Merge pull request #1 from gedoor/master

Sys code

app/build.gradle

@@ -211,11 +211,6 @@ dependencies {
 
     //转换繁体
     implementation 'com.github.liuyueyi.quick-chinese-transfer:quick-transfer-core:0.1.3'
-    //epub
-//    implementation('com.positiondev.epublib:epublib-core:3.1') {
-//        exclude group: 'org.slf4j'
-//        exclude group: 'xmlpull'
-//    }
 
 }
 

app/src/main/AndroidManifest.xml

@@ -171,6 +171,10 @@
         <activity
             android:name=".ui.audio.AudioPlayActivity"
             android:launchMode="singleTask" />
+        <!-- 授权界面 -->
+        <activity
+            android:name=".help.permission.PermissionActivity"
+            android:theme="@style/Activity.Permission" />
         <!-- 二维码扫描 -->
         <activity
             android:name=".ui.qrcode.QrCodeActivity"

app/src/main/assets/defaultData/rssSources.json

@@ -1,9 +1,18 @@
 [
   {
-    "articleStyle": 0,
     "customOrder": 1,
     "enableJs": true,
     "enabled": true,
+    "singleUrl": true,
+    "sourceIcon": "http:\/\/ku.mumuceo.com\/static\/images\/applogo\/yuedu.png",
+    "sourceName": "使用说明",
+    "sourceUrl": "https://www.yuque.com/legado"
+  },
+  {
+    "articleStyle": 0,
+    "customOrder": 2,
+    "enableJs": true,
+    "enabled": true,
     "loadWithBaseUrl": false,
     "ruleArticles": "class.release-main-section||tbody@tr",
     "ruleContent": "@js:\nif(baseUrl.match(\/90pan\/)){\nresult=result.replace(\/true\\||<a href=\"([^\"]+)\".*?><.*?>([^<]+)<\\\/span><\\\/a>\/g,'<h4><a href=\"$1\" style=\"color:#000\">$2<\/a><\/h4><p style=\"font-size:10px\">$1<\/p>\\n\\n')}\nelse{\nhtml=String(java.getString(\"@@class.markdown-body@html\",false)+java.getString(\"@@class.flex-justify-between.-1@html\",false));\nhref='https:\/\/github.com'+String(java.getString(\"@@class.flex-justify-between.-1@class.Box-body.0@a@href\",false))\nhtml+'<br><p>下载地址：<\/p><a style=\"font-size:13px\">'+href+'<\/a>'\n}",
@@ -19,7 +28,7 @@
     "style": ""
   },
   {
-    "customOrder": 1,
+    "customOrder": 3,
     "enableJs": true,
     "enabled": true,
     "singleUrl": true,

app/src/main/assets/updateLog.md

@@ -7,6 +7,7 @@
 * 修复繁简转换“勐”“十”问题。使用了剥离HanLP简繁代码的民间库。APK减少6M左右
 * js添加一个并发访问的方法 java.ajaxAll(urlList: Array<String>) 返回 Array<StrResponse?>
 * 优化目录并发访问
+* 添加自定义epublib,支持epub v3解析目录。by ag2s20150909
 
 **2021/03/19**
 * 修复图片地址参数缺少的bug

app/src/main/java/io/legado/app/help/LocalConfig.kt

@@ -10,6 +10,33 @@ object LocalConfig {
     private val localConfig =
         appCtx.getSharedPreferences("local", Context.MODE_PRIVATE)
 
+    val readHelpVersionIsLast: Boolean
+        get() = isLastVersion(1, "readHelpVersion", "firstRead")
+
+    val backupHelpVersionIsLast: Boolean
+        get() = isLastVersion(1, "backupHelpVersion", "firstBackup")
+
+    val readMenuHelpVersionIsLast: Boolean
+        get() = isLastVersion(1, "readMenuHelpVersion", "firstReadMenu")
+
+    val bookSourcesHelpVersionIsLast: Boolean
+        get() = isLastVersion(1, "bookSourceHelpVersion", "firstOpenBookSources")
+
+    val debugHelpVersionIsLast: Boolean
+        get() = isLastVersion(1, "debugHelpVersion")
+
+    val ruleHelpVersionIsLast: Boolean
+        get() = isLastVersion(1, "ruleHelpVersion")
+
+    val hasUpHttpTTS: Boolean
+        get() = !isLastVersion(3, "httpTtsVersion")
+
+    val hasUpTxtTocRule: Boolean
+        get() = !isLastVersion(1, "txtTocRuleVersion")
+
+    val hasUpRssSources: Boolean
+        get() = !isLastVersion(3, "rssSourceVersion")
+
     var versionCode
         get() = localConfig.getLong(versionCodeKey, 0)
         set(value) {
@@ -46,30 +73,4 @@ object LocalConfig {
         return true
     }
 
-    val readHelpVersionIsLast: Boolean
-        get() = isLastVersion(1, "readHelpVersion", "firstRead")
-
-    val backupHelpVersionIsLast: Boolean
-        get() = isLastVersion(1, "backupHelpVersion", "firstBackup")
-
-    val readMenuHelpVersionIsLast: Boolean
-        get() = isLastVersion(1, "readMenuHelpVersion", "firstReadMenu")
-
-    val bookSourcesHelpVersionIsLast: Boolean
-        get() = isLastVersion(1, "bookSourceHelpVersion", "firstOpenBookSources")
-
-    val debugHelpVersionIsLast: Boolean
-        get() = isLastVersion(1, "debugHelpVersion")
-
-    val ruleHelpVersionIsLast: Boolean
-        get() = isLastVersion(1, "ruleHelpVersion")
-
-    val hasUpHttpTTS: Boolean
-        get() = !isLastVersion(3, "httpTtsVersion")
-
-    val hasUpTxtTocRule: Boolean
-        get() = !isLastVersion(1, "txtTocRuleVersion")
-
-    val hasUpRssSources: Boolean
-        get() = !isLastVersion(1, "rssSourceVersion")
 }

app/src/main/java/io/legado/app/help/permission/ActivitySource.kt

@@ -0,0 +1,20 @@
+package io.legado.app.help.permission
+
+import android.content.Context
+import android.content.Intent
+import androidx.appcompat.app.AppCompatActivity
+
+import java.lang.ref.WeakReference
+
+internal class ActivitySource(activity: AppCompatActivity) : RequestSource {
+
+    private val actRef: WeakReference<AppCompatActivity> = WeakReference(activity)
+
+    override val context: Context?
+        get() = actRef.get()
+
+    override fun startActivity(intent: Intent) {
+        actRef.get()?.startActivity(intent)
+    }
+
+}

app/src/main/java/io/legado/app/help/permission/FragmentSource.kt

@@ -0,0 +1,19 @@
+package io.legado.app.help.permission
+
+import android.content.Context
+import android.content.Intent
+import androidx.fragment.app.Fragment
+
+import java.lang.ref.WeakReference
+
+internal class FragmentSource(fragment: Fragment) : RequestSource {
+
+    private val fragRef: WeakReference<Fragment> = WeakReference(fragment)
+
+    override val context: Context?
+        get() = fragRef.get()?.requireContext()
+
+    override fun startActivity(intent: Intent) {
+        fragRef.get()?.startActivity(intent)
+    }
+}

app/src/main/java/io/legado/app/help/permission/OnPermissionsDeniedCallback.kt

@@ -0,0 +1,7 @@
+package io.legado.app.help.permission
+
+interface OnPermissionsDeniedCallback {
+
+    fun onPermissionsDenied(requestCode: Int, deniedPermissions: Array<String>)
+
+}

app/src/main/java/io/legado/app/help/permission/OnPermissionsGrantedCallback.kt

@@ -0,0 +1,7 @@
+package io.legado.app.help.permission
+
+interface OnPermissionsGrantedCallback {
+
+    fun onPermissionsGranted(requestCode: Int)
+
+}

app/src/main/java/io/legado/app/help/permission/OnPermissionsResultCallback.kt

@@ -0,0 +1,9 @@
+package io.legado.app.help.permission
+
+interface OnPermissionsResultCallback {
+
+    fun onPermissionsGranted(requestCode: Int)
+
+    fun onPermissionsDenied(requestCode: Int, deniedPermissions: Array<String>)
+
+}

app/src/main/java/io/legado/app/help/permission/OnRequestPermissionsResultCallback.kt

@@ -0,0 +1,14 @@
+package io.legado.app.help.permission
+
+import android.content.Intent
+
+interface OnRequestPermissionsResultCallback {
+
+    fun onRequestPermissionsResult(
+        requestCode: Int,
+        permissions: Array<String>,
+        grantResults: IntArray
+    )
+
+    fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?)
+}

app/src/main/java/io/legado/app/help/permission/PermissionActivity.kt

@@ -0,0 +1,84 @@
+package io.legado.app.help.permission
+
+import android.content.Intent
+import android.net.Uri
+import android.os.Bundle
+import android.provider.Settings
+import android.view.KeyEvent
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.app.ActivityCompat
+import io.legado.app.R
+import io.legado.app.utils.toastOnUi
+
+class PermissionActivity : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        when (intent.getIntExtra(KEY_INPUT_REQUEST_TYPE, Request.TYPE_REQUEST_PERMISSION)) {
+            Request.TYPE_REQUEST_PERMISSION//权限请求
+            -> {
+                val requestCode = intent.getIntExtra(KEY_INPUT_PERMISSIONS_CODE, 1000)
+                val permissions = intent.getStringArrayExtra(KEY_INPUT_PERMISSIONS)
+                if (permissions != null) {
+                    ActivityCompat.requestPermissions(this, permissions, requestCode)
+                } else {
+                    finish()
+                }
+            }
+            Request.TYPE_REQUEST_SETTING//跳转到设置界面
+            -> try {
+                val settingIntent = Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS)
+                settingIntent.data = Uri.fromParts("package", packageName, null)
+                startActivityForResult(settingIntent, Request.TYPE_REQUEST_SETTING)
+            } catch (e: Exception) {
+                toastOnUi(R.string.tip_cannot_jump_setting_page)
+                finish()
+            }
+
+        }
+    }
+
+    override fun onRequestPermissionsResult(
+        requestCode: Int,
+        permissions: Array<String>,
+        grantResults: IntArray
+    ) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
+        RequestPlugins.sRequestCallback?.onRequestPermissionsResult(
+            requestCode,
+            permissions,
+            grantResults
+        )
+        finish()
+    }
+
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        super.onActivityResult(requestCode, resultCode, data)
+        RequestPlugins.sRequestCallback?.onActivityResult(requestCode, resultCode, data)
+        finish()
+    }
+
+    override fun startActivity(intent: Intent) {
+        super.startActivity(intent)
+        overridePendingTransition(0, 0)
+    }
+
+    override fun finish() {
+        super.finish()
+        overridePendingTransition(0, 0)
+    }
+
+    override fun onKeyDown(keyCode: Int, event: KeyEvent): Boolean {
+        return if (keyCode == KeyEvent.KEYCODE_BACK) {
+            true
+        } else super.onKeyDown(keyCode, event)
+    }
+
+    companion object {
+
+        const val KEY_INPUT_REQUEST_TYPE = "KEY_INPUT_REQUEST_TYPE"
+        const val KEY_INPUT_PERMISSIONS_CODE = "KEY_INPUT_PERMISSIONS_CODE"
+        const val KEY_INPUT_PERMISSIONS = "KEY_INPUT_PERMISSIONS"
+    }
+}

app/src/main/java/io/legado/app/help/permission/Permissions.kt

@@ -1,4 +1,4 @@
-package io.legado.app.constant
+package io.legado.app.help.permission
 
 @Suppress("unused")
 object Permissions {

app/src/main/java/io/legado/app/help/permission/PermissionsCompat.kt

@@ -0,0 +1,94 @@
+package io.legado.app.help.permission
+
+import androidx.annotation.StringRes
+import androidx.appcompat.app.AppCompatActivity
+import androidx.fragment.app.Fragment
+import java.util.*
+
+@Suppress("unused")
+class PermissionsCompat private constructor() {
+
+    private var request: Request? = null
+
+    fun request() {
+        RequestManager.pushRequest(request)
+    }
+
+    companion object {
+        // 检查权限, 如果已经拥有返回 true
+        fun check(activity: AppCompatActivity, vararg permissions: String): Boolean {
+            val request = Request(activity)
+            val pers = ArrayList<String>()
+            pers.addAll(listOf(*permissions))
+            val data = request.getDeniedPermissions(pers.toTypedArray())
+            return data == null
+        }
+    }
+
+    class Builder {
+        private val request: Request
+
+        constructor(activity: AppCompatActivity) {
+            request = Request(activity)
+        }
+
+        constructor(fragment: Fragment) {
+            request = Request(fragment)
+        }
+
+        fun addPermissions(vararg permissions: String): Builder {
+            request.addPermissions(*permissions)
+            return this
+        }
+
+        fun requestCode(requestCode: Int): Builder {
+            request.setRequestCode(requestCode)
+            return this
+        }
+
+        fun onGranted(callback: (requestCode: Int) -> Unit): Builder {
+            request.setOnGrantedCallback(object : OnPermissionsGrantedCallback {
+                override fun onPermissionsGranted(requestCode: Int) {
+                    callback(requestCode)
+                }
+            })
+            return this
+        }
+
+        fun onDenied(callback: (requestCode: Int, deniedPermissions: Array<String>) -> Unit): Builder {
+            request.setOnDeniedCallback(object : OnPermissionsDeniedCallback {
+                override fun onPermissionsDenied(
+                    requestCode: Int,
+                    deniedPermissions: Array<String>
+                ) {
+                    callback(requestCode, deniedPermissions)
+                }
+            })
+            return this
+        }
+
+        fun rationale(rationale: CharSequence): Builder {
+            request.setRationale(rationale)
+            return this
+        }
+
+        fun rationale(@StringRes resId: Int): Builder {
+            request.setRationale(resId)
+            return this
+        }
+
+        fun build(): PermissionsCompat {
+            val compat = PermissionsCompat()
+            compat.request = request
+            return compat
+        }
+
+        fun request(): PermissionsCompat {
+            val compat = build()
+            compat.request = request
+            compat.request()
+            return compat
+        }
+    }
+
+}

app/src/main/java/io/legado/app/help/permission/Request.kt

@@ -0,0 +1,204 @@
+package io.legado.app.help.permission
+
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.os.Build
+import androidx.annotation.StringRes
+import androidx.appcompat.app.AlertDialog
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.content.ContextCompat
+import androidx.fragment.app.Fragment
+import io.legado.app.R
+import io.legado.app.utils.startActivity
+import java.util.*
+
+internal class Request : OnRequestPermissionsResultCallback {
+
+    internal val requestTime: Long
+    private var requestCode: Int = TYPE_REQUEST_PERMISSION
+    private var source: RequestSource? = null
+    private var permissions: ArrayList<String>? = null
+    private var grantedCallback: OnPermissionsGrantedCallback? = null
+    private var deniedCallback: OnPermissionsDeniedCallback? = null
+    private var rationaleResId: Int = 0
+    private var rationale: CharSequence? = null
+
+    private var rationaleDialog: AlertDialog? = null
+
+    private val deniedPermissions: Array<String>?
+        get() {
+            return getDeniedPermissions(this.permissions?.toTypedArray())
+        }
+
+    constructor(activity: AppCompatActivity) {
+        source = ActivitySource(activity)
+        permissions = ArrayList()
+        requestTime = System.currentTimeMillis()
+    }
+
+    constructor(fragment: Fragment) {
+        source = FragmentSource(fragment)
+        permissions = ArrayList()
+        requestTime = System.currentTimeMillis()
+    }
+
+    fun addPermissions(vararg permissions: String) {
+        this.permissions?.addAll(listOf(*permissions))
+    }
+
+    fun setRequestCode(requestCode: Int) {
+        this.requestCode = requestCode
+    }
+
+    fun setOnGrantedCallback(callback: OnPermissionsGrantedCallback) {
+        grantedCallback = callback
+    }
+
+    fun setOnDeniedCallback(callback: OnPermissionsDeniedCallback) {
+        deniedCallback = callback
+    }
+
+    fun setRationale(@StringRes resId: Int) {
+        rationaleResId = resId
+        rationale = null
+    }
+
+    fun setRationale(rationale: CharSequence) {
+        this.rationale = rationale
+        rationaleResId = 0
+    }
+
+    fun start() {
+        RequestPlugins.setOnRequestPermissionsCallback(this)
+
+        val deniedPermissions = deniedPermissions
+
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
+            if (deniedPermissions == null) {
+                onPermissionsGranted(requestCode)
+            } else {
+                val rationale =
+                    if (rationaleResId != 0) source?.context?.getText(rationaleResId) else rationale
+                if (rationale != null) {
+                    showSettingDialog(rationale) {
+                        onPermissionsDenied(
+                            requestCode,
+                            deniedPermissions
+                        )
+                    }
+                } else {
+                    onPermissionsDenied(requestCode, deniedPermissions)
+                }
+            }
+        } else {
+            if (deniedPermissions != null) {
+                source?.context?.startActivity<PermissionActivity> {
+                    putExtra(PermissionActivity.KEY_INPUT_REQUEST_TYPE, TYPE_REQUEST_PERMISSION)
+                    putExtra(PermissionActivity.KEY_INPUT_PERMISSIONS_CODE, requestCode)
+                    putExtra(PermissionActivity.KEY_INPUT_PERMISSIONS, deniedPermissions)
+                }
+            } else {
+                onPermissionsGranted(requestCode)
+            }
+        }
+    }
+
+    fun clear() {
+        grantedCallback = null
+        deniedCallback = null
+    }
+
+    fun getDeniedPermissions(permissions: Array<String>?): Array<String>? {
+        if (permissions != null) {
+            val deniedPermissionList = ArrayList<String>()
+            for (permission in permissions) {
+                if (source?.context?.let {
+                        ContextCompat.checkSelfPermission(
+                            it,
+                            permission
+                        )
+                    } != PackageManager.PERMISSION_GRANTED
+                ) {
+                    deniedPermissionList.add(permission)
+                }
+            }
+            val size = deniedPermissionList.size
+            if (size > 0) {
+                return deniedPermissionList.toTypedArray()
+            }
+        }
+        return null
+    }
+
+    private fun showSettingDialog(rationale: CharSequence, cancel: () -> Unit) {
+        rationaleDialog?.dismiss()
+        source?.context?.let {
+            runCatching {
+                rationaleDialog = AlertDialog.Builder(it)
+                    .setTitle(R.string.dialog_title)
+                    .setMessage(rationale)
+                    .setPositiveButton(R.string.dialog_setting) { _, _ ->
+                        it.startActivity<PermissionActivity> {
+                            putExtra(
+                                PermissionActivity.KEY_INPUT_REQUEST_TYPE,
+                                TYPE_REQUEST_SETTING
+                            )
+                        }
+                    }
+                    .setNegativeButton(R.string.dialog_cancel) { _, _ -> cancel() }
+                    .show()
+            }
+        }
+    }
+
+    private fun onPermissionsGranted(requestCode: Int) {
+        try {
+            grantedCallback?.onPermissionsGranted(requestCode)
+        } catch (ignore: Exception) {
+        }
+
+        RequestPlugins.sResultCallback?.onPermissionsGranted(requestCode)
+    }
+
+    private fun onPermissionsDenied(requestCode: Int, deniedPermissions: Array<String>) {
+        try {
+            deniedCallback?.onPermissionsDenied(requestCode, deniedPermissions)
+        } catch (ignore: Exception) {
+        }
+
+        RequestPlugins.sResultCallback?.onPermissionsDenied(requestCode, deniedPermissions)
+    }
+
+    override fun onRequestPermissionsResult(
+        requestCode: Int,
+        permissions: Array<String>,
+        grantResults: IntArray
+    ) {
+        val deniedPermissions = getDeniedPermissions(permissions)
+        if (deniedPermissions != null) {
+            val rationale =
+                if (rationaleResId != 0) source?.context?.getText(rationaleResId) else rationale
+            if (rationale != null) {
+                showSettingDialog(rationale) { onPermissionsDenied(requestCode, deniedPermissions) }
+            } else {
+                onPermissionsDenied(requestCode, deniedPermissions)
+            }
+        } else {
+            onPermissionsGranted(requestCode)
+        }
+    }
+
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        val deniedPermissions = deniedPermissions
+        if (deniedPermissions == null) {
+            onPermissionsGranted(this.requestCode)
+        } else {
+            onPermissionsDenied(this.requestCode, deniedPermissions)
+        }
+    }
+
+    companion object {
+        const val TYPE_REQUEST_PERMISSION = 1
+        const val TYPE_REQUEST_SETTING = 2
+    }
+}

app/src/main/java/io/legado/app/help/permission/RequestManager.kt

@@ -0,0 +1,69 @@
+package io.legado.app.help.permission
+
+import android.os.Handler
+import android.os.Looper
+import java.util.*
+
+internal object RequestManager : OnPermissionsResultCallback {
+
+    private var requests: Stack<Request>? = null
+    private var request: Request? = null
+
+    private val handler = Handler(Looper.getMainLooper())
+
+    private val requestRunnable = Runnable {
+        request?.start()
+    }
+
+    private val isCurrentRequestInvalid: Boolean
+        get() = request?.let { System.currentTimeMillis() - it.requestTime > 5 * 1000L } ?: true
+
+    init {
+        RequestPlugins.setOnPermissionsResultCallback(this)
+    }
+
+    fun pushRequest(request: Request?) {
+        if (request == null) return
+
+        if (requests == null) {
+            requests = Stack()
+        }
+
+        requests?.let {
+            val index = it.indexOf(request)
+            if (index >= 0) {
+                val to = it.size - 1
+                if (index != to) {
+                    @Suppress("NULLABILITY_MISMATCH_BASED_ON_JAVA_ANNOTATIONS")
+                    Collections.swap(requests, index, to)
+                }
+            } else {
+                it.push(request)
+            }
+
+            if (!it.empty() && isCurrentRequestInvalid) {
+                this.request = it.pop()
+                handler.post(requestRunnable)
+            }
+        }
+    }
+
+    private fun startNextRequest() {
+        request?.clear()
+        request = null
+
+        requests?.let {
+            request = if (it.empty()) null else it.pop()
+            request?.let { handler.post(requestRunnable) }
+        }
+    }
+
+    override fun onPermissionsGranted(requestCode: Int) {
+        startNextRequest()
+    }
+
+    override fun onPermissionsDenied(requestCode: Int, deniedPermissions: Array<String>) {
+        startNextRequest()
+    }
+
+}

app/src/main/java/io/legado/app/help/permission/RequestPlugins.kt

@@ -0,0 +1,20 @@
+package io.legado.app.help.permission
+
+internal object RequestPlugins {
+
+    @Volatile
+    var sRequestCallback: OnRequestPermissionsResultCallback? = null
+
+    @Volatile
+    var sResultCallback: OnPermissionsResultCallback? = null
+
+    fun setOnRequestPermissionsCallback(callback: OnRequestPermissionsResultCallback) {
+        sRequestCallback = callback
+    }
+
+    fun setOnPermissionsResultCallback(callback: OnPermissionsResultCallback) {
+        sResultCallback = callback
+    }
+
+
+}

app/src/main/java/io/legado/app/help/permission/RequestSource.kt

@@ -0,0 +1,12 @@
+package io.legado.app.help.permission
+
+import android.content.Context
+import android.content.Intent
+
+interface RequestSource {
+
+    val context: Context?
+
+    fun startActivity(intent: Intent)
+
+}

app/src/main/java/io/legado/app/model/localBook/EpubFile.kt

@@ -5,14 +5,12 @@ import android.graphics.BitmapFactory
 import android.net.Uri
 import android.text.TextUtils
 import io.legado.app.data.appDb
+import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookChapter
-import io.legado.app.data.entities.EpubChapter
 import io.legado.app.utils.*
-
+import me.ag2s.epublib.domain.EpubBook
-import me.ag2s.epublib.domain.Book
 import me.ag2s.epublib.domain.MediaTypes
 import me.ag2s.epublib.domain.Resources
-import me.ag2s.epublib.domain.TOCReference
 import me.ag2s.epublib.epub.EpubReader
 import me.ag2s.epublib.util.ResourceUtil
 import org.jsoup.Jsoup
@@ -26,15 +24,15 @@ import java.util.*
 import java.util.zip.ZipEntry
 import java.util.zip.ZipInputStream
 
-class EPUBFile(var book: io.legado.app.data.entities.Book) {
+class EpubFile(var book: Book) {
 
     companion object {
-        private var eFile: EPUBFile? = null
+        private var eFile: EpubFile? = null
 
         @Synchronized
-        private fun getEFile(book: io.legado.app.data.entities.Book): EPUBFile {
+        private fun getEFile(book: Book): EpubFile {
             if (eFile == null || eFile?.book?.bookUrl != book.bookUrl) {
-                eFile = EPUBFile(book)
+                eFile = EpubFile(book)
                 return eFile!!
             }
             eFile?.book = book
@@ -42,30 +40,30 @@ class EPUBFile(var book: io.legado.app.data.entities.Book) {
         }
 
         @Synchronized
-        fun getChapterList(book: io.legado.app.data.entities.Book): ArrayList<BookChapter> {
+        fun getChapterList(book: Book): ArrayList<BookChapter> {
             return getEFile(book).getChapterList()
         }
 
         @Synchronized
-        fun getContent(book: io.legado.app.data.entities.Book, chapter: BookChapter): String? {
+        fun getContent(book: Book, chapter: BookChapter): String? {
             return getEFile(book).getContent(chapter)
         }
 
         @Synchronized
         fun getImage(
-            book: io.legado.app.data.entities.Book,
+            book: Book,
             href: String
         ): InputStream? {
             return getEFile(book).getImage(href)
         }
 
         @Synchronized
-        fun upBookInfo(book: io.legado.app.data.entities.Book) {
+        fun upBookInfo(book: Book) {
             return getEFile(book).upBookInfo()
         }
     }
 
-    private var epubBook: Book? = null
+    private var epubBook: EpubBook? = null
     private var mCharset: Charset = Charset.defaultCharset()
 
     init {
@@ -102,7 +100,7 @@ class EPUBFile(var book: io.legado.app.data.entities.Book) {
     }
 
     /*重写epub文件解析代码，直接读出压缩包文件生成Resources给epublib，这样的好处是可以逐一修改某些文件的格式错误*/
-    private fun readEpub(input: InputStream?): Book? {
+    private fun readEpub(input: InputStream?): EpubBook? {
         if (input == null) return null
         try {
             val inZip = ZipInputStream(input)
@@ -156,7 +154,7 @@ class EPUBFile(var book: io.legado.app.data.entities.Book) {
             }
 
             /*选择去除正文中的H标签，部分书籍标题与阅读标题重复待优化*/
-            var tag = io.legado.app.data.entities.Book.hTag
+            var tag = Book.hTag
             if (book.getDelTag(tag)) {
                 body.getElementsByTag("h1")?.remove()
                 body.getElementsByTag("h2")?.remove()
@@ -168,7 +166,7 @@ class EPUBFile(var book: io.legado.app.data.entities.Book) {
             }
 
             /*选择去除正文中的img标签，目前图片支持效果待优化*/
-            tag = io.legado.app.data.entities.Book.imgTag
+            tag = Book.imgTag
             if (book.getDelTag(tag)) {
                 body.getElementsByTag("img")?.remove()
             }
@@ -177,7 +175,7 @@ class EPUBFile(var book: io.legado.app.data.entities.Book) {
             elements.select("script").remove()
             elements.select("style").remove()
             /*选择去除正文中的ruby标签，目前注释支持效果待优化*/
-            tag = io.legado.app.data.entities.Book.rubyTag
+            tag = Book.rubyTag
             var html = elements.outerHtml()
             if (book.getDelTag(tag)) {
                 html = html.replace("<ruby>\\s?([\\u4e00-\\u9fa5])\\s?.*?</ruby>".toRegex(), "$1")
@@ -212,15 +210,7 @@ class EPUBFile(var book: io.legado.app.data.entities.Book) {
 
     private fun getChapterList(): ArrayList<BookChapter> {
         val chapterList = ArrayList<BookChapter>()
-        epubBook?.let { eBook ->
+        epubBook?.tableOfContents?.allUniqueResources?.forEachIndexed { index, resource ->
-            val refs = eBook.tableOfContents.tocReferences
-            if (refs == null || refs.isEmpty()) {
-                val spineReferences = eBook.spine.spineReferences
-                var i = 0
-                val size = spineReferences.size
-                while (i < size) {
-                    val resource =
-                        spineReferences[i].resource
             var title = resource.title
             if (TextUtils.isEmpty(title)) {
                 try {
@@ -235,133 +225,19 @@ class EPUBFile(var book: io.legado.app.data.entities.Book) {
                 }
             }
             val chapter = BookChapter()
-                    chapter.index = i
+            chapter.index = index
             chapter.bookUrl = book.bookUrl
             chapter.url = resource.href
-                    if (i == 0 && title.isEmpty()) {
+            if (index == 0 && title.isEmpty()) {
                 chapter.title = "封面"
             } else {
                 chapter.title = title
             }
             chapterList.add(chapter)
-                    i++
-                }
-            } else {
-                parseFirstPage(chapterList, refs)
-                parseMenu(chapterList, refs, 0)
-                for (i in chapterList.indices) {
-                    chapterList[i].index = i
-                }
-                getChildChapter(chapterList)
-            }
         }
         book.latestChapterTitle = chapterList.lastOrNull()?.title
         book.totalChapterNum = chapterList.size
         return chapterList
     }
 
-    /*获取当前章节的子章节。部分书籍一个章节包含多个html文件，（一些精排书籍，每一章节正文前的标题、标题封面、引言等都会有独立html）*/
-    /*需在读取常规章节列表后调用，遍历书籍全内容，根据href检索原不包含在章节内的html归属父章节*/
-    private fun getChildChapter(chapterList: ArrayList<BookChapter>) {
-        epubBook?.let {
-            val contents = it.contents
-            val chapters = ArrayList<EpubChapter>()
-            if (contents != null) {
-                var i = 0
-                var j = 0
-                var parentHref: String? = null
-                while (i < contents.size) {
-                    val content = contents[i]
-                    if (j < chapterList.size && content.href == chapterList[j].url) {
-                        parentHref = content.href
-                        j++
-                    } else if (!parentHref.isNullOrBlank() && content.mediaType.toString()
-                            .contains("htm")
-                    ) {
-                        val epubChapter = EpubChapter()
-                        epubChapter.bookUrl = book.bookUrl
-                        epubChapter.href = content.href
-                        epubChapter.parentHref = parentHref
-                        chapters.add(epubChapter)
-                    }
-                    i++
-                }
-            }
-            appDb.epubChapterDao.deleteByName(book.bookUrl)
-            if (chapters.size > 0) appDb.epubChapterDao.insert(*chapters.toTypedArray())
-        }
-    }
-
-    /*获取书籍起始页内容。部分书籍第一章之前存在封面，引言，扉页等内容*/
-    /*tile获取不同书籍风格杂乱，格式化处理待优化*/
-    private var durIndex = 0
-    private fun parseFirstPage(
-        chapterList: ArrayList<BookChapter>,
-        refs: List<TOCReference>?
-    ) {
-        val contents = epubBook?.contents
-        if (epubBook == null || contents == null || refs == null) return
-        var i = 0
-        durIndex = 0
-        while (i < contents.size) {
-            val content = contents[i]
-            if (!content.mediaType.toString().contains("htm")) continue
-            /*检索到第一章href停止*/
-            if (refs[0].completeHref == content.href) break
-            val chapter = BookChapter()
-            var title = content.title
-            if (TextUtils.isEmpty(title)) {
-                val elements = Jsoup.parse(
-                    String(
-                        epubBook!!.resources.getByHref(content.href).data,
-                        mCharset
-                    )
-                ).getElementsByTag("title")
-                title =
-                    if (elements != null && elements.size > 0 && elements[0].text()
-                            .isNotBlank()
-                    ) elements[0].text() else "--卷首--"
-            }
-            chapter.bookUrl = book.bookUrl
-            chapter.title = title
-            chapter.url = content.href
-            chapter.startFragmentId =
-                if (content.href.substringAfter("#") == content.href) null
-                else content.href.substringAfter("#")
-            if (durIndex > 0) {
-                val preIndex = durIndex - 1
-                chapterList[preIndex].endFragmentId = chapter.startFragmentId
-            }
-            chapterList.add(chapter)
-            durIndex++
-            i++
-        }
-    }
-
-    private fun parseMenu(
-        chapterList: ArrayList<BookChapter>,
-        refs: List<TOCReference>?,
-        level: Int
-    ) {
-        refs?.forEach { ref ->
-            if (ref.resource != null) {
-                val chapter = BookChapter()
-                chapter.bookUrl = book.bookUrl
-                chapter.title = ref.title
-                chapter.url = ref.completeHref
-                chapter.startFragmentId = ref.fragmentId
-                if (durIndex > 0) {
-                    val preIndex = durIndex - 1
-                    chapterList[preIndex].endFragmentId = chapter.startFragmentId
-                }
-                chapterList.add(chapter)
-                durIndex++
-            }
-            if (ref.children != null && ref.children.isNotEmpty()) {
-                parseMenu(chapterList, ref.children, level + 1)
-            }
-        }
-    }
-
-
 }

app/src/main/java/io/legado/app/model/localBook/LocalBook.kt

@@ -22,7 +22,7 @@ object LocalBook {
 
     fun getChapterList(book: Book): ArrayList<BookChapter> {
         return if (book.isEpub()) {
-            EPUBFile.getChapterList(book)
+            EpubFile.getChapterList(book)
         } else {
             AnalyzeTxtFile().analyze(book)
         }
@@ -30,7 +30,7 @@ object LocalBook {
 
     fun getContext(book: Book, chapter: BookChapter): String? {
         return if (book.isEpub()) {
-            EPUBFile.getContent(book, chapter)
+            EpubFile.getContent(book, chapter)
         } else {
             AnalyzeTxtFile.getContent(book, chapter)
         }
@@ -83,7 +83,7 @@ object LocalBook {
                 "${MD5Utils.md5Encode16(path)}.jpg"
             )
         )
-        if (book.isEpub()) EPUBFile.upBookInfo(book)
+        if (book.isEpub()) EpubFile.upBookInfo(book)
         appDb.bookDao.insert(book)
         return book
     }

app/src/main/java/io/legado/app/ui/book/info/edit/BookInfoEditActivity.kt

@@ -1,18 +1,19 @@
 package io.legado.app.ui.book.info.edit
 
 import android.app.Activity
+import android.content.Intent
 import android.net.Uri
 import android.os.Bundle
 import android.view.Menu
 import android.view.MenuItem
-import androidx.activity.result.contract.ActivityResultContracts
 import androidx.activity.viewModels
 import androidx.documentfile.provider.DocumentFile
 import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
-import io.legado.app.constant.Permissions
 import io.legado.app.data.entities.Book
 import io.legado.app.databinding.ActivityBookInfoEditBinding
+import io.legado.app.help.permission.Permissions
+import io.legado.app.help.permission.PermissionsCompat
 import io.legado.app.ui.book.changecover.ChangeCoverDialog
 import io.legado.app.utils.*
 import java.io.File
@@ -21,9 +22,7 @@ class BookInfoEditActivity :
     VMBaseActivity<ActivityBookInfoEditBinding, BookInfoEditViewModel>(),
     ChangeCoverDialog.CallBack {
 
-    private val selectCover = registerForActivityResult(ActivityResultContracts.GetContent()) {
+    private val resultSelectCover = 132
-        coverChangeTo(it)
-    }
 
     override val viewModel: BookInfoEditViewModel
             by viewModels()
@@ -61,7 +60,7 @@ class BookInfoEditActivity :
             }
         }
         tvSelectCover.setOnClickListener {
-            selectCover.launch("image/*")
+            selectImage()
         }
         tvRefreshCover.setOnClickListener {
             viewModel.book?.customCoverUrl = tieCoverUrl.text?.toString()
@@ -97,6 +96,13 @@ class BookInfoEditActivity :
         }
     }
 
+    private fun selectImage() {
+        val intent = Intent(Intent.ACTION_GET_CONTENT)
+        intent.addCategory(Intent.CATEGORY_OPENABLE)
+        intent.type = "image/*"
+        startActivityForResult(intent, resultSelectCover)
+    }
+
     override fun coverChangeTo(coverUrl: String) {
         viewModel.book?.customCoverUrl = coverUrl
         binding.tieCoverUrl.setText(coverUrl)
@@ -117,7 +123,13 @@ class BookInfoEditActivity :
                 } ?: toastOnUi("获取文件出错")
             }
         } else {
-            registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) {
+            PermissionsCompat.Builder(this)
+                .addPermissions(
+                    Permissions.READ_EXTERNAL_STORAGE,
+                    Permissions.WRITE_EXTERNAL_STORAGE
+                )
+                .rationale(R.string.bg_image_per)
+                .onGranted {
                     RealPathUtil.getPath(this, uri)?.let { path ->
                         val imgFile = File(path)
                         if (imgFile.exists()) {
@@ -127,8 +139,21 @@ class BookInfoEditActivity :
                             coverChangeTo(file.absolutePath)
                         }
                     }
-            }.launch(Permissions.Group.STORAGE)
+                }
+                .request()
         }
     }
 
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        super.onActivityResult(requestCode, resultCode, data)
+        when (requestCode) {
+            resultSelectCover -> {
+                if (resultCode == Activity.RESULT_OK) {
+                    data?.data?.let { uri ->
+                        coverChangeTo(uri)
+                    }
+                }
+            }
+        }
+    }
 }

app/src/main/java/io/legado/app/ui/book/local/ImportBookActivity.kt

@@ -8,7 +8,6 @@ import android.os.Bundle
 import android.provider.DocumentsContract
 import android.view.Menu
 import android.view.MenuItem
-import androidx.activity.result.contract.ActivityResultContracts
 import androidx.activity.viewModels
 import androidx.appcompat.widget.PopupMenu
 import androidx.documentfile.provider.DocumentFile
@@ -16,10 +15,11 @@ import androidx.lifecycle.LiveData
 import androidx.recyclerview.widget.LinearLayoutManager
 import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
-import io.legado.app.constant.Permissions
 import io.legado.app.data.appDb
 import io.legado.app.databinding.ActivityImportBookBinding
 import io.legado.app.help.AppConfig
+import io.legado.app.help.permission.Permissions
+import io.legado.app.help.permission.PermissionsCompat
 import io.legado.app.lib.theme.backgroundColor
 import io.legado.app.ui.filepicker.FilePicker
 import io.legado.app.ui.filepicker.FilePickerDialog
@@ -148,12 +148,16 @@ class ImportBookActivity : VMBaseActivity<ActivityImportBookBinding, ImportBookV
             }
             else -> {
                 binding.tvEmptyMsg.visible()
-                registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) {
+                PermissionsCompat.Builder(this)
+                    .addPermissions(*Permissions.Group.STORAGE)
+                    .rationale(R.string.tip_perm_request_storage)
+                    .onGranted {
                         rootDoc = null
                         subDocs.clear()
                         path = lastPath
                         upPath()
-                }.launch(Permissions.Group.STORAGE)
+                    }
+                    .request()
             }
         }
     }

app/src/main/java/io/legado/app/ui/book/read/config/BgTextConfigDialog.kt

@@ -8,17 +8,17 @@ import android.graphics.Color
 import android.net.Uri
 import android.os.Bundle
 import android.view.*
-import androidx.activity.result.contract.ActivityResultContracts
 import androidx.documentfile.provider.DocumentFile
 import com.jaredrummler.android.colorpicker.ColorPickerDialog
 import io.legado.app.R
 import io.legado.app.base.BaseDialogFragment
 import io.legado.app.constant.EventBus
-import io.legado.app.constant.Permissions
 import io.legado.app.databinding.DialogEditTextBinding
 import io.legado.app.databinding.DialogReadBgTextBinding
 import io.legado.app.databinding.ItemBgImageBinding
 import io.legado.app.help.ReadBookConfig
+import io.legado.app.help.permission.Permissions
+import io.legado.app.help.permission.PermissionsCompat
 import io.legado.app.lib.dialogs.alert
 import io.legado.app.lib.theme.bottomBackground
 import io.legado.app.lib.theme.getPrimaryTextColor
@@ -40,6 +40,7 @@ class BgTextConfigDialog : BaseDialogFragment(), FilePickerDialog.CallBack {
     }
 
     private val binding by viewBinding(DialogReadBgTextBinding::bind)
+    private val requestCodeBg = 123
     private val requestCodeExport = 131
     private val requestCodeImport = 132
     private val configFileName = "readConfig.zip"
@@ -190,9 +191,10 @@ class BgTextConfigDialog : BaseDialogFragment(), FilePickerDialog.CallBack {
     }
 
     private fun selectImage() {
-        registerForActivityResult(ActivityResultContracts.GetContent()) {
+        val intent = Intent(Intent.ACTION_GET_CONTENT)
-            setBgFromUri(it)
+        intent.addCategory(Intent.CATEGORY_OPENABLE)
-        }.launch("image/*")
+        intent.type = "image/*"
+        startActivityForResult(intent, requestCodeBg)
     }
 
     @Suppress("BlockingMethodInNonBlockingContext")
@@ -369,7 +371,13 @@ class BgTextConfigDialog : BaseDialogFragment(), FilePickerDialog.CallBack {
     }
 
     override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        super.onActivityResult(requestCode, resultCode, data)
         when (requestCode) {
+            requestCodeBg -> if (resultCode == RESULT_OK) {
+                data?.data?.let { uri ->
+                    setBgFromUri(uri)
+                }
+            }
             requestCodeImport -> if (resultCode == RESULT_OK) {
                 data?.data?.let { uri ->
                     importConfig(uri)
@@ -399,13 +407,20 @@ class BgTextConfigDialog : BaseDialogFragment(), FilePickerDialog.CallBack {
                 } ?: toastOnUi("获取文件出错")
             }
         } else {
-            registerForActivityResult(ActivityResultContracts.RequestPermission()) {
+            PermissionsCompat.Builder(this)
+                .addPermissions(
+                    Permissions.READ_EXTERNAL_STORAGE,
+                    Permissions.WRITE_EXTERNAL_STORAGE
+                )
+                .rationale(R.string.bg_image_per)
+                .onGranted {
                     RealPathUtil.getPath(requireContext(), uri)?.let { path ->
                         ReadBookConfig.durConfig.setCurBg(2, path)
                         ReadBookConfig.upBg()
                         postEvent(EventBus.UP_CONFIG, false)
                     }
-            }.launch(Permissions.READ_EXTERNAL_STORAGE)
+                }
+                .request()
         }
     }
 }

app/src/main/java/io/legado/app/ui/book/read/page/delegate/curl/CurlMesh.java

@@ -0,0 +1,957 @@
+package io.legado.app.ui.book.read.page.delegate.curl;
+
+import android.graphics.Bitmap;
+import android.graphics.Color;
+import android.graphics.PointF;
+import android.graphics.RectF;
+import android.opengl.GLUtils;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.FloatBuffer;
+
+import javax.microedition.khronos.opengles.GL10;
+
+/**
+ * Class implementing actual curl/page rendering.
+ *
+ * @author harism
+ */
+public class CurlMesh {
+
+    // Flag for rendering some lines used for developing. Shows
+    // curl position and one for the direction from the
+    // position given. Comes handy once playing around with different
+    // ways for following pointer.
+    private static final boolean DRAW_CURL_POSITION = false;
+    // Flag for drawing polygon outlines. Using this flag crashes on emulator
+    // due to reason unknown to me. Leaving it here anyway as seeing polygon
+    // outlines gives good insight how original rectangle is divided.
+    private static final boolean DRAW_POLYGON_OUTLINES = false;
+    // Flag for enabling shadow rendering.
+    private static final boolean DRAW_SHADOW = true;
+    // Flag for texture rendering. While this is likely something you
+    // don't want to do it's been used for development purposes as texture
+    // rendering is rather slow on emulator.
+    private static final boolean DRAW_TEXTURE = true;
+
+    // Colors for shadow. Inner one is the color drawn next to surface where
+    // shadowed area starts and outer one is color shadow ends to.
+    private static final float[] SHADOW_INNER_COLOR = {0f, 0f, 0f, .5f};
+    private static final float[] SHADOW_OUTER_COLOR = {0f, 0f, 0f, .0f};
+
+    // Let's avoid using 'new' as much as possible. Meaning we introduce arrays
+    // once here and reuse them on runtime. Doesn't really have very much effect
+    // but avoids some garbage collections from happening.
+    private Array<ShadowVertex> mArrDropShadowVertices;
+    private Array<Vertex> mArrIntersections;
+    private Array<Vertex> mArrOutputVertices;
+    private Array<Vertex> mArrRotatedVertices;
+    private Array<Double> mArrScanLines;
+    private Array<ShadowVertex> mArrSelfShadowVertices;
+    private Array<ShadowVertex> mArrTempShadowVertices;
+    private Array<Vertex> mArrTempVertices;
+
+    // Buffers for feeding rasterizer.
+    private FloatBuffer mBufColors;
+    private FloatBuffer mBufCurlPositionLines;
+    private FloatBuffer mBufShadowColors;
+    private FloatBuffer mBufShadowVertices;
+    private FloatBuffer mBufTexCoords;
+    private FloatBuffer mBufVertices;
+
+    private int mCurlPositionLinesCount;
+    private int mDropShadowCount;
+
+    // Boolean for 'flipping' texture sideways.
+    private boolean mFlipTexture = false;
+    // Maximum number of split lines used for creating a curl.
+    private int mMaxCurlSplits;
+
+    // Bounding rectangle for this mesh. mRectagle[0] = top-left corner,
+    // mRectangle[1] = bottom-left, mRectangle[2] = top-right and mRectangle[3]
+    // bottom-right.
+    private final Vertex[] mRectangle = new Vertex[4];
+    private int mSelfShadowCount;
+
+    private boolean mTextureBack = false;
+    // Texture ids and other variables.
+    private int[] mTextureIds = null;
+    private final CurlPage mTexturePage = new CurlPage();
+    private final RectF mTextureRectBack = new RectF();
+    private final RectF mTextureRectFront = new RectF();
+
+    private int mVerticesCountBack;
+    private int mVerticesCountFront;
+
+    /**
+     * Constructor for mesh object.
+     *
+     * @param maxCurlSplits Maximum number curl can be divided into. The bigger the value
+     *                      the smoother curl will be. With the cost of having more
+     *                      polygons for drawing.
+     */
+    public CurlMesh(int maxCurlSplits) {
+        // There really is no use for 0 splits.
+        mMaxCurlSplits = maxCurlSplits < 1 ? 1 : maxCurlSplits;
+
+        mArrScanLines = new Array<Double>(maxCurlSplits + 2);
+        mArrOutputVertices = new Array<Vertex>(7);
+        mArrRotatedVertices = new Array<Vertex>(4);
+        mArrIntersections = new Array<Vertex>(2);
+        mArrTempVertices = new Array<Vertex>(7 + 4);
+        for (int i = 0; i < 7 + 4; ++i) {
+            mArrTempVertices.add(new Vertex());
+        }
+
+        if (DRAW_SHADOW) {
+            mArrSelfShadowVertices = new Array<ShadowVertex>(
+                    (mMaxCurlSplits + 2) * 2);
+            mArrDropShadowVertices = new Array<ShadowVertex>(
+                    (mMaxCurlSplits + 2) * 2);
+            mArrTempShadowVertices = new Array<ShadowVertex>(
+                    (mMaxCurlSplits + 2) * 2);
+            for (int i = 0; i < (mMaxCurlSplits + 2) * 2; ++i) {
+                mArrTempShadowVertices.add(new ShadowVertex());
+            }
+        }
+
+        // Rectangle consists of 4 vertices. Index 0 = top-left, index 1 =
+        // bottom-left, index 2 = top-right and index 3 = bottom-right.
+        for (int i = 0; i < 4; ++i) {
+            mRectangle[i] = new Vertex();
+        }
+        // Set up shadow penumbra direction to each vertex. We do fake 'self
+        // shadow' calculations based on this information.
+        mRectangle[0].mPenumbraX = mRectangle[1].mPenumbraX = mRectangle[1].mPenumbraY = mRectangle[3].mPenumbraY = -1;
+        mRectangle[0].mPenumbraY = mRectangle[2].mPenumbraX = mRectangle[2].mPenumbraY = mRectangle[3].mPenumbraX = 1;
+
+        if (DRAW_CURL_POSITION) {
+            mCurlPositionLinesCount = 3;
+            ByteBuffer hvbb = ByteBuffer
+                    .allocateDirect(mCurlPositionLinesCount * 2 * 2 * 4);
+            hvbb.order(ByteOrder.nativeOrder());
+            mBufCurlPositionLines = hvbb.asFloatBuffer();
+            mBufCurlPositionLines.position(0);
+        }
+
+        // There are 4 vertices from bounding rect, max 2 from adding split line
+        // to two corners and curl consists of max mMaxCurlSplits lines each
+        // outputting 2 vertices.
+        int maxVerticesCount = 4 + 2 + (2 * mMaxCurlSplits);
+        ByteBuffer vbb = ByteBuffer.allocateDirect(maxVerticesCount * 3 * 4);
+        vbb.order(ByteOrder.nativeOrder());
+        mBufVertices = vbb.asFloatBuffer();
+        mBufVertices.position(0);
+
+        if (DRAW_TEXTURE) {
+            ByteBuffer tbb = ByteBuffer
+                    .allocateDirect(maxVerticesCount * 2 * 4);
+            tbb.order(ByteOrder.nativeOrder());
+            mBufTexCoords = tbb.asFloatBuffer();
+            mBufTexCoords.position(0);
+        }
+
+        ByteBuffer cbb = ByteBuffer.allocateDirect(maxVerticesCount * 4 * 4);
+        cbb.order(ByteOrder.nativeOrder());
+        mBufColors = cbb.asFloatBuffer();
+        mBufColors.position(0);
+
+        if (DRAW_SHADOW) {
+            int maxShadowVerticesCount = (mMaxCurlSplits + 2) * 2 * 2;
+            ByteBuffer scbb = ByteBuffer
+                    .allocateDirect(maxShadowVerticesCount * 4 * 4);
+            scbb.order(ByteOrder.nativeOrder());
+            mBufShadowColors = scbb.asFloatBuffer();
+            mBufShadowColors.position(0);
+
+            ByteBuffer sibb = ByteBuffer
+                    .allocateDirect(maxShadowVerticesCount * 3 * 4);
+            sibb.order(ByteOrder.nativeOrder());
+            mBufShadowVertices = sibb.asFloatBuffer();
+            mBufShadowVertices.position(0);
+
+            mDropShadowCount = mSelfShadowCount = 0;
+        }
+    }
+
+    /**
+     * Adds vertex to buffers.
+     */
+    private void addVertex(Vertex vertex) {
+        mBufVertices.put((float) vertex.mPosX);
+        mBufVertices.put((float) vertex.mPosY);
+        mBufVertices.put((float) vertex.mPosZ);
+        mBufColors.put(vertex.mColorFactor * Color.red(vertex.mColor) / 255f);
+        mBufColors.put(vertex.mColorFactor * Color.green(vertex.mColor) / 255f);
+        mBufColors.put(vertex.mColorFactor * Color.blue(vertex.mColor) / 255f);
+        mBufColors.put(Color.alpha(vertex.mColor) / 255f);
+        if (DRAW_TEXTURE) {
+            mBufTexCoords.put((float) vertex.mTexX);
+            mBufTexCoords.put((float) vertex.mTexY);
+        }
+    }
+
+    /**
+     * Sets curl for this mesh.
+     *
+     * @param curlPos Position for curl 'center'. Can be any point on line collinear
+     *                to curl.
+     * @param curlDir Curl direction, should be normalized.
+     * @param radius  Radius of curl.
+     */
+    public synchronized void curl(PointF curlPos, PointF curlDir, double radius) {
+
+        // First add some 'helper' lines used for development.
+        if (DRAW_CURL_POSITION) {
+            mBufCurlPositionLines.position(0);
+
+            mBufCurlPositionLines.put(curlPos.x);
+            mBufCurlPositionLines.put(curlPos.y - 1.0f);
+            mBufCurlPositionLines.put(curlPos.x);
+            mBufCurlPositionLines.put(curlPos.y + 1.0f);
+            mBufCurlPositionLines.put(curlPos.x - 1.0f);
+            mBufCurlPositionLines.put(curlPos.y);
+            mBufCurlPositionLines.put(curlPos.x + 1.0f);
+            mBufCurlPositionLines.put(curlPos.y);
+
+            mBufCurlPositionLines.put(curlPos.x);
+            mBufCurlPositionLines.put(curlPos.y);
+            mBufCurlPositionLines.put(curlPos.x + curlDir.x * 2);
+            mBufCurlPositionLines.put(curlPos.y + curlDir.y * 2);
+
+            mBufCurlPositionLines.position(0);
+        }
+
+        // Actual 'curl' implementation starts here.
+        mBufVertices.position(0);
+        mBufColors.position(0);
+        if (DRAW_TEXTURE) {
+            mBufTexCoords.position(0);
+        }
+
+        // Calculate curl angle from direction.
+        double curlAngle = Math.acos(curlDir.x);
+        curlAngle = curlDir.y > 0 ? -curlAngle : curlAngle;
+
+        // Initiate rotated rectangle which's is translated to curlPos and
+        // rotated so that curl direction heads to right (1,0). Vertices are
+        // ordered in ascending order based on x -coordinate at the same time.
+        // And using y -coordinate in very rare case in which two vertices have
+        // same x -coordinate.
+        mArrTempVertices.addAll(mArrRotatedVertices);
+        mArrRotatedVertices.clear();
+        for (int i = 0; i < 4; ++i) {
+            Vertex v = mArrTempVertices.remove(0);
+            v.set(mRectangle[i]);
+            v.translate(-curlPos.x, -curlPos.y);
+            v.rotateZ(-curlAngle);
+            int j = 0;
+            for (; j < mArrRotatedVertices.size(); ++j) {
+                Vertex v2 = mArrRotatedVertices.get(j);
+                if (v.mPosX > v2.mPosX) {
+                    break;
+                }
+                if (v.mPosX == v2.mPosX && v.mPosY > v2.mPosY) {
+                    break;
+                }
+            }
+            mArrRotatedVertices.add(j, v);
+        }
+
+        // Rotated rectangle lines/vertex indices. We need to find bounding
+        // lines for rotated rectangle. After sorting vertices according to
+        // their x -coordinate we don't have to worry about vertices at indices
+        // 0 and 1. But due to inaccuracy it's possible vertex 3 is not the
+        // opposing corner from vertex 0. So we are calculating distance from
+        // vertex 0 to vertices 2 and 3 - and altering line indices if needed.
+        // Also vertices/lines are given in an order first one has x -coordinate
+        // at least the latter one. This property is used in getIntersections to
+        // see if there is an intersection.
+        int lines[][] = {{0, 1}, {0, 2}, {1, 3}, {2, 3}};
+        {
+            // TODO: There really has to be more 'easier' way of doing this -
+            // not including extensive use of sqrt.
+            Vertex v0 = mArrRotatedVertices.get(0);
+            Vertex v2 = mArrRotatedVertices.get(2);
+            Vertex v3 = mArrRotatedVertices.get(3);
+            double dist2 = Math.sqrt((v0.mPosX - v2.mPosX)
+                    * (v0.mPosX - v2.mPosX) + (v0.mPosY - v2.mPosY)
+                    * (v0.mPosY - v2.mPosY));
+            double dist3 = Math.sqrt((v0.mPosX - v3.mPosX)
+                    * (v0.mPosX - v3.mPosX) + (v0.mPosY - v3.mPosY)
+                    * (v0.mPosY - v3.mPosY));
+            if (dist2 > dist3) {
+                lines[1][1] = 3;
+                lines[2][1] = 2;
+            }
+        }
+
+        mVerticesCountFront = mVerticesCountBack = 0;
+
+        if (DRAW_SHADOW) {
+            mArrTempShadowVertices.addAll(mArrDropShadowVertices);
+            mArrTempShadowVertices.addAll(mArrSelfShadowVertices);
+            mArrDropShadowVertices.clear();
+            mArrSelfShadowVertices.clear();
+        }
+
+        // Length of 'curl' curve.
+        double curlLength = Math.PI * radius;
+        // Calculate scan lines.
+        // TODO: Revisit this code one day. There is room for optimization here.
+        mArrScanLines.clear();
+        if (mMaxCurlSplits > 0) {
+            mArrScanLines.add((double) 0);
+        }
+        for (int i = 1; i < mMaxCurlSplits; ++i) {
+            mArrScanLines.add((-curlLength * i) / (mMaxCurlSplits - 1));
+        }
+        // As mRotatedVertices is ordered regarding x -coordinate, adding
+        // this scan line produces scan area picking up vertices which are
+        // rotated completely. One could say 'until infinity'.
+        mArrScanLines.add(mArrRotatedVertices.get(3).mPosX - 1);
+
+        // Start from right most vertex. Pretty much the same as first scan area
+        // is starting from 'infinity'.
+        double scanXmax = mArrRotatedVertices.get(0).mPosX + 1;
+
+        for (int i = 0; i < mArrScanLines.size(); ++i) {
+            // Once we have scanXmin and scanXmax we have a scan area to start
+            // working with.
+            double scanXmin = mArrScanLines.get(i);
+            // First iterate 'original' rectangle vertices within scan area.
+            for (int j = 0; j < mArrRotatedVertices.size(); ++j) {
+                Vertex v = mArrRotatedVertices.get(j);
+                // Test if vertex lies within this scan area.
+                // TODO: Frankly speaking, can't remember why equality check was
+                // added to both ends. Guessing it was somehow related to case
+                // where radius=0f, which, given current implementation, could
+                // be handled much more effectively anyway.
+                if (v.mPosX >= scanXmin && v.mPosX <= scanXmax) {
+                    // Pop out a vertex from temp vertices.
+                    Vertex n = mArrTempVertices.remove(0);
+                    n.set(v);
+                    // This is done solely for triangulation reasons. Given a
+                    // rotated rectangle it has max 2 vertices having
+                    // intersection.
+                    Array<Vertex> intersections = getIntersections(
+                            mArrRotatedVertices, lines, n.mPosX);
+                    // In a sense one could say we're adding vertices always in
+                    // two, positioned at the ends of intersecting line. And for
+                    // triangulation to work properly they are added based on y
+                    // -coordinate. And this if-else is doing it for us.
+                    if (intersections.size() == 1
+                            && intersections.get(0).mPosY > v.mPosY) {
+                        // In case intersecting vertex is higher add it first.
+                        mArrOutputVertices.addAll(intersections);
+                        mArrOutputVertices.add(n);
+                    } else if (intersections.size() <= 1) {
+                        // Otherwise add original vertex first.
+                        mArrOutputVertices.add(n);
+                        mArrOutputVertices.addAll(intersections);
+                    } else {
+                        // There should never be more than 1 intersecting
+                        // vertex. But if it happens as a fallback simply skip
+                        // everything.
+                        mArrTempVertices.add(n);
+                        mArrTempVertices.addAll(intersections);
+                    }
+                }
+            }
+
+            // Search for scan line intersections.
+            Array<Vertex> intersections = getIntersections(mArrRotatedVertices,
+                    lines, scanXmin);
+
+            // We expect to get 0 or 2 vertices. In rare cases there's only one
+            // but in general given a scan line intersecting rectangle there
+            // should be 2 intersecting vertices.
+            if (intersections.size() == 2) {
+                // There were two intersections, add them based on y
+                // -coordinate, higher first, lower last.
+                Vertex v1 = intersections.get(0);
+                Vertex v2 = intersections.get(1);
+                if (v1.mPosY < v2.mPosY) {
+                    mArrOutputVertices.add(v2);
+                    mArrOutputVertices.add(v1);
+                } else {
+                    mArrOutputVertices.addAll(intersections);
+                }
+            } else if (intersections.size() != 0) {
+                // This happens in a case in which there is a original vertex
+                // exactly at scan line or something went very much wrong if
+                // there are 3+ vertices. What ever the reason just return the
+                // vertices to temp vertices for later use. In former case it
+                // was handled already earlier once iterating through
+                // mRotatedVertices, in latter case it's better to avoid doing
+                // anything with them.
+                mArrTempVertices.addAll(intersections);
+            }
+
+            // Add vertices found during this iteration to vertex etc buffers.
+            while (mArrOutputVertices.size() > 0) {
+                Vertex v = mArrOutputVertices.remove(0);
+                mArrTempVertices.add(v);
+
+                // Local texture front-facing flag.
+                boolean textureFront;
+
+                // Untouched vertices.
+                if (i == 0) {
+                    textureFront = true;
+                    mVerticesCountFront++;
+                }
+                // 'Completely' rotated vertices.
+                else if (i == mArrScanLines.size() - 1 || curlLength == 0) {
+                    v.mPosX = -(curlLength + v.mPosX);
+                    v.mPosZ = 2 * radius;
+                    v.mPenumbraX = -v.mPenumbraX;
+
+                    textureFront = false;
+                    mVerticesCountBack++;
+                }
+                // Vertex lies within 'curl'.
+                else {
+                    // Even though it's not obvious from the if-else clause,
+                    // here v.mPosX is between [-curlLength, 0]. And we can do
+                    // calculations around a half cylinder.
+                    double rotY = Math.PI * (v.mPosX / curlLength);
+                    v.mPosX = radius * Math.sin(rotY);
+                    v.mPosZ = radius - (radius * Math.cos(rotY));
+                    v.mPenumbraX *= Math.cos(rotY);
+                    // Map color multiplier to [.1f, 1f] range.
+                    v.mColorFactor = (float) (.1f + .9f * Math.sqrt(Math
+                            .sin(rotY) + 1));
+
+                    if (v.mPosZ >= radius) {
+                        textureFront = false;
+                        mVerticesCountBack++;
+                    } else {
+                        textureFront = true;
+                        mVerticesCountFront++;
+                    }
+                }
+
+                // We use local textureFront for flipping backside texture
+                // locally. Plus additionally if mesh is in flip texture mode,
+                // we'll make the procedure "backwards". Also, until this point,
+                // texture coordinates are within [0, 1] range so we'll adjust
+                // them to final texture coordinates too.
+                if (textureFront != mFlipTexture) {
+                    v.mTexX *= mTextureRectFront.right;
+                    v.mTexY *= mTextureRectFront.bottom;
+                    v.mColor = mTexturePage.getColor(CurlPage.SIDE_FRONT);
+                } else {
+                    v.mTexX *= mTextureRectBack.right;
+                    v.mTexY *= mTextureRectBack.bottom;
+                    v.mColor = mTexturePage.getColor(CurlPage.SIDE_BACK);
+                }
+
+                // Move vertex back to 'world' coordinates.
+                v.rotateZ(curlAngle);
+                v.translate(curlPos.x, curlPos.y);
+                addVertex(v);
+
+                // Drop shadow is cast 'behind' the curl.
+                if (DRAW_SHADOW && v.mPosZ > 0 && v.mPosZ <= radius) {
+                    ShadowVertex sv = mArrTempShadowVertices.remove(0);
+                    sv.mPosX = v.mPosX;
+                    sv.mPosY = v.mPosY;
+                    sv.mPosZ = v.mPosZ;
+                    sv.mPenumbraX = (v.mPosZ / 2) * -curlDir.x;
+                    sv.mPenumbraY = (v.mPosZ / 2) * -curlDir.y;
+                    sv.mPenumbraColor = v.mPosZ / radius;
+                    int idx = (mArrDropShadowVertices.size() + 1) / 2;
+                    mArrDropShadowVertices.add(idx, sv);
+                }
+                // Self shadow is cast partly over mesh.
+                if (DRAW_SHADOW && v.mPosZ > radius) {
+                    ShadowVertex sv = mArrTempShadowVertices.remove(0);
+                    sv.mPosX = v.mPosX;
+                    sv.mPosY = v.mPosY;
+                    sv.mPosZ = v.mPosZ;
+                    sv.mPenumbraX = ((v.mPosZ - radius) / 3) * v.mPenumbraX;
+                    sv.mPenumbraY = ((v.mPosZ - radius) / 3) * v.mPenumbraY;
+                    sv.mPenumbraColor = (v.mPosZ - radius) / (2 * radius);
+                    int idx = (mArrSelfShadowVertices.size() + 1) / 2;
+                    mArrSelfShadowVertices.add(idx, sv);
+                }
+            }
+
+            // Switch scanXmin as scanXmax for next iteration.
+            scanXmax = scanXmin;
+        }
+
+        mBufVertices.position(0);
+        mBufColors.position(0);
+        if (DRAW_TEXTURE) {
+            mBufTexCoords.position(0);
+        }
+
+        // Add shadow Vertices.
+        if (DRAW_SHADOW) {
+            mBufShadowColors.position(0);
+            mBufShadowVertices.position(0);
+            mDropShadowCount = 0;
+
+            for (int i = 0; i < mArrDropShadowVertices.size(); ++i) {
+                ShadowVertex sv = mArrDropShadowVertices.get(i);
+                mBufShadowVertices.put((float) sv.mPosX);
+                mBufShadowVertices.put((float) sv.mPosY);
+                mBufShadowVertices.put((float) sv.mPosZ);
+                mBufShadowVertices.put((float) (sv.mPosX + sv.mPenumbraX));
+                mBufShadowVertices.put((float) (sv.mPosY + sv.mPenumbraY));
+                mBufShadowVertices.put((float) sv.mPosZ);
+                for (int j = 0; j < 4; ++j) {
+                    double color = SHADOW_OUTER_COLOR[j]
+                            + (SHADOW_INNER_COLOR[j] - SHADOW_OUTER_COLOR[j])
+                            * sv.mPenumbraColor;
+                    mBufShadowColors.put((float) color);
+                }
+                mBufShadowColors.put(SHADOW_OUTER_COLOR);
+                mDropShadowCount += 2;
+            }
+            mSelfShadowCount = 0;
+            for (int i = 0; i < mArrSelfShadowVertices.size(); ++i) {
+                ShadowVertex sv = mArrSelfShadowVertices.get(i);
+                mBufShadowVertices.put((float) sv.mPosX);
+                mBufShadowVertices.put((float) sv.mPosY);
+                mBufShadowVertices.put((float) sv.mPosZ);
+                mBufShadowVertices.put((float) (sv.mPosX + sv.mPenumbraX));
+                mBufShadowVertices.put((float) (sv.mPosY + sv.mPenumbraY));
+                mBufShadowVertices.put((float) sv.mPosZ);
+                for (int j = 0; j < 4; ++j) {
+                    double color = SHADOW_OUTER_COLOR[j]
+                            + (SHADOW_INNER_COLOR[j] - SHADOW_OUTER_COLOR[j])
+                            * sv.mPenumbraColor;
+                    mBufShadowColors.put((float) color);
+                }
+                mBufShadowColors.put(SHADOW_OUTER_COLOR);
+                mSelfShadowCount += 2;
+            }
+            mBufShadowColors.position(0);
+            mBufShadowVertices.position(0);
+        }
+    }
+
+    /**
+     * Calculates intersections for given scan line.
+     */
+    private Array<Vertex> getIntersections(Array<Vertex> vertices,
+                                           int[][] lineIndices, double scanX) {
+        mArrIntersections.clear();
+        // Iterate through rectangle lines each re-presented as a pair of
+        // vertices.
+        for (int j = 0; j < lineIndices.length; j++) {
+            Vertex v1 = vertices.get(lineIndices[j][0]);
+            Vertex v2 = vertices.get(lineIndices[j][1]);
+            // Here we expect that v1.mPosX >= v2.mPosX and wont do intersection
+            // test the opposite way.
+            if (v1.mPosX > scanX && v2.mPosX < scanX) {
+                // There is an intersection, calculate coefficient telling 'how
+                // far' scanX is from v2.
+                double c = (scanX - v2.mPosX) / (v1.mPosX - v2.mPosX);
+                Vertex n = mArrTempVertices.remove(0);
+                n.set(v2);
+                n.mPosX = scanX;
+                n.mPosY += (v1.mPosY - v2.mPosY) * c;
+                if (DRAW_TEXTURE) {
+                    n.mTexX += (v1.mTexX - v2.mTexX) * c;
+                    n.mTexY += (v1.mTexY - v2.mTexY) * c;
+                }
+                if (DRAW_SHADOW) {
+                    n.mPenumbraX += (v1.mPenumbraX - v2.mPenumbraX) * c;
+                    n.mPenumbraY += (v1.mPenumbraY - v2.mPenumbraY) * c;
+                }
+                mArrIntersections.add(n);
+            }
+        }
+        return mArrIntersections;
+    }
+
+    /**
+     * Getter for textures page for this mesh.
+     */
+    public synchronized CurlPage getTexturePage() {
+        return mTexturePage;
+    }
+
+    /**
+     * Renders our page curl mesh.
+     */
+    public synchronized void onDrawFrame(GL10 gl) {
+        // First allocate texture if there is not one yet.
+        if (DRAW_TEXTURE && mTextureIds == null) {
+            // Generate texture.
+            mTextureIds = new int[2];
+            gl.glGenTextures(2, mTextureIds, 0);
+            for (int textureId : mTextureIds) {
+                // Set texture attributes.
+                gl.glBindTexture(GL10.GL_TEXTURE_2D, textureId);
+                gl.glTexParameterf(GL10.GL_TEXTURE_2D,
+                        GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_NEAREST);
+                gl.glTexParameterf(GL10.GL_TEXTURE_2D,
+                        GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_NEAREST);
+                gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S,
+                        GL10.GL_CLAMP_TO_EDGE);
+                gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T,
+                        GL10.GL_CLAMP_TO_EDGE);
+            }
+        }
+
+        if (DRAW_TEXTURE && mTexturePage.getTexturesChanged()) {
+            gl.glBindTexture(GL10.GL_TEXTURE_2D, mTextureIds[0]);
+            Bitmap texture = mTexturePage.getTexture(mTextureRectFront,
+                    CurlPage.SIDE_FRONT);
+            GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, texture, 0);
+            texture.recycle();
+
+            mTextureBack = mTexturePage.hasBackTexture();
+            if (mTextureBack) {
+                gl.glBindTexture(GL10.GL_TEXTURE_2D, mTextureIds[1]);
+                texture = mTexturePage.getTexture(mTextureRectBack,
+                        CurlPage.SIDE_BACK);
+                GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, texture, 0);
+                texture.recycle();
+            } else {
+                mTextureRectBack.set(mTextureRectFront);
+            }
+
+            mTexturePage.recycle();
+            reset();
+        }
+
+        // Some 'global' settings.
+        gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
+
+        // TODO: Drop shadow drawing is done temporarily here to hide some
+        // problems with its calculation.
+        if (DRAW_SHADOW) {
+            gl.glDisable(GL10.GL_TEXTURE_2D);
+            gl.glEnable(GL10.GL_BLEND);
+            gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
+            gl.glEnableClientState(GL10.GL_COLOR_ARRAY);
+            gl.glColorPointer(4, GL10.GL_FLOAT, 0, mBufShadowColors);
+            gl.glVertexPointer(3, GL10.GL_FLOAT, 0, mBufShadowVertices);
+            gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, mDropShadowCount);
+            gl.glDisableClientState(GL10.GL_COLOR_ARRAY);
+            gl.glDisable(GL10.GL_BLEND);
+        }
+
+        if (DRAW_TEXTURE) {
+            gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
+            gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, mBufTexCoords);
+        }
+        gl.glVertexPointer(3, GL10.GL_FLOAT, 0, mBufVertices);
+        // Enable color array.
+        gl.glEnableClientState(GL10.GL_COLOR_ARRAY);
+        gl.glColorPointer(4, GL10.GL_FLOAT, 0, mBufColors);
+
+        // Draw front facing blank vertices.
+        gl.glDisable(GL10.GL_TEXTURE_2D);
+        gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, mVerticesCountFront);
+
+        // Draw front facing texture.
+        if (DRAW_TEXTURE) {
+            gl.glEnable(GL10.GL_BLEND);
+            gl.glEnable(GL10.GL_TEXTURE_2D);
+
+            if (!mFlipTexture || !mTextureBack) {
+                gl.glBindTexture(GL10.GL_TEXTURE_2D, mTextureIds[0]);
+            } else {
+                gl.glBindTexture(GL10.GL_TEXTURE_2D, mTextureIds[1]);
+            }
+
+            gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
+            gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, mVerticesCountFront);
+
+            gl.glDisable(GL10.GL_BLEND);
+            gl.glDisable(GL10.GL_TEXTURE_2D);
+        }
+
+        int backStartIdx = Math.max(0, mVerticesCountFront - 2);
+        int backCount = mVerticesCountFront + mVerticesCountBack - backStartIdx;
+
+        // Draw back facing blank vertices.
+        gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, backStartIdx, backCount);
+
+        // Draw back facing texture.
+        if (DRAW_TEXTURE) {
+            gl.glEnable(GL10.GL_BLEND);
+            gl.glEnable(GL10.GL_TEXTURE_2D);
+
+            if (mFlipTexture || !mTextureBack) {
+                gl.glBindTexture(GL10.GL_TEXTURE_2D, mTextureIds[0]);
+            } else {
+                gl.glBindTexture(GL10.GL_TEXTURE_2D, mTextureIds[1]);
+            }
+
+            gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
+            gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, backStartIdx, backCount);
+
+            gl.glDisable(GL10.GL_BLEND);
+            gl.glDisable(GL10.GL_TEXTURE_2D);
+        }
+
+        // Disable textures and color array.
+        gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
+        gl.glDisableClientState(GL10.GL_COLOR_ARRAY);
+
+        if (DRAW_POLYGON_OUTLINES) {
+            gl.glEnable(GL10.GL_BLEND);
+            gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
+            gl.glLineWidth(1.0f);
+            gl.glColor4f(0.5f, 0.5f, 1.0f, 1.0f);
+            gl.glVertexPointer(3, GL10.GL_FLOAT, 0, mBufVertices);
+            gl.glDrawArrays(GL10.GL_LINE_STRIP, 0, mVerticesCountFront);
+            gl.glDisable(GL10.GL_BLEND);
+        }
+
+        if (DRAW_CURL_POSITION) {
+            gl.glEnable(GL10.GL_BLEND);
+            gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
+            gl.glLineWidth(1.0f);
+            gl.glColor4f(1.0f, 0.5f, 0.5f, 1.0f);
+            gl.glVertexPointer(2, GL10.GL_FLOAT, 0, mBufCurlPositionLines);
+            gl.glDrawArrays(GL10.GL_LINES, 0, mCurlPositionLinesCount * 2);
+            gl.glDisable(GL10.GL_BLEND);
+        }
+
+        if (DRAW_SHADOW) {
+            gl.glEnable(GL10.GL_BLEND);
+            gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
+            gl.glEnableClientState(GL10.GL_COLOR_ARRAY);
+            gl.glColorPointer(4, GL10.GL_FLOAT, 0, mBufShadowColors);
+            gl.glVertexPointer(3, GL10.GL_FLOAT, 0, mBufShadowVertices);
+            gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, mDropShadowCount,
+                    mSelfShadowCount);
+            gl.glDisableClientState(GL10.GL_COLOR_ARRAY);
+            gl.glDisable(GL10.GL_BLEND);
+        }
+
+        gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
+    }
+
+    /**
+     * Resets mesh to 'initial' state. Meaning this mesh will draw a plain
+     * textured rectangle after call to this method.
+     */
+    public synchronized void reset() {
+        mBufVertices.position(0);
+        mBufColors.position(0);
+        if (DRAW_TEXTURE) {
+            mBufTexCoords.position(0);
+        }
+        for (int i = 0; i < 4; ++i) {
+            Vertex tmp = mArrTempVertices.get(0);
+            tmp.set(mRectangle[i]);
+
+            if (mFlipTexture) {
+                tmp.mTexX *= mTextureRectBack.right;
+                tmp.mTexY *= mTextureRectBack.bottom;
+                tmp.mColor = mTexturePage.getColor(CurlPage.SIDE_BACK);
+            } else {
+                tmp.mTexX *= mTextureRectFront.right;
+                tmp.mTexY *= mTextureRectFront.bottom;
+                tmp.mColor = mTexturePage.getColor(CurlPage.SIDE_FRONT);
+            }
+
+            addVertex(tmp);
+        }
+        mVerticesCountFront = 4;
+        mVerticesCountBack = 0;
+        mBufVertices.position(0);
+        mBufColors.position(0);
+        if (DRAW_TEXTURE) {
+            mBufTexCoords.position(0);
+        }
+
+        mDropShadowCount = mSelfShadowCount = 0;
+    }
+
+    /**
+     * Resets allocated texture id forcing creation of new one. After calling
+     * this method you most likely want to set bitmap too as it's lost. This
+     * method should be called only once e.g GL context is re-created as this
+     * method does not release previous texture id, only makes sure new one is
+     * requested on next render.
+     */
+    public synchronized void resetTexture() {
+        mTextureIds = null;
+    }
+
+    /**
+     * If true, flips texture sideways.
+     */
+    public synchronized void setFlipTexture(boolean flipTexture) {
+        mFlipTexture = flipTexture;
+        if (flipTexture) {
+            setTexCoords(1f, 0f, 0f, 1f);
+        } else {
+            setTexCoords(0f, 0f, 1f, 1f);
+        }
+    }
+
+    /**
+     * Update mesh bounds.
+     */
+    public void setRect(RectF r) {
+        mRectangle[0].mPosX = r.left;
+        mRectangle[0].mPosY = r.top;
+        mRectangle[1].mPosX = r.left;
+        mRectangle[1].mPosY = r.bottom;
+        mRectangle[2].mPosX = r.right;
+        mRectangle[2].mPosY = r.top;
+        mRectangle[3].mPosX = r.right;
+        mRectangle[3].mPosY = r.bottom;
+    }
+
+    /**
+     * Sets texture coordinates to mRectangle vertices.
+     */
+    private synchronized void setTexCoords(float left, float top, float right,
+                                           float bottom) {
+        mRectangle[0].mTexX = left;
+        mRectangle[0].mTexY = top;
+        mRectangle[1].mTexX = left;
+        mRectangle[1].mTexY = bottom;
+        mRectangle[2].mTexX = right;
+        mRectangle[2].mTexY = top;
+        mRectangle[3].mTexX = right;
+        mRectangle[3].mTexY = bottom;
+    }
+
+    /**
+     * Simple fixed size array implementation.
+     */
+    private class Array<T> {
+        private Object[] mArray;
+        private int mCapacity;
+        private int mSize;
+
+        public Array(int capacity) {
+            mCapacity = capacity;
+            mArray = new Object[capacity];
+        }
+
+        public void add(int index, T item) {
+            if (index < 0 || index > mSize || mSize >= mCapacity) {
+                throw new IndexOutOfBoundsException();
+            }
+            for (int i = mSize; i > index; --i) {
+                mArray[i] = mArray[i - 1];
+            }
+            mArray[index] = item;
+            ++mSize;
+        }
+
+        public void add(T item) {
+            if (mSize >= mCapacity) {
+                throw new IndexOutOfBoundsException();
+            }
+            mArray[mSize++] = item;
+        }
+
+        public void addAll(Array<T> array) {
+            if (mSize + array.size() > mCapacity) {
+                throw new IndexOutOfBoundsException();
+            }
+            for (int i = 0; i < array.size(); ++i) {
+                mArray[mSize++] = array.get(i);
+            }
+        }
+
+        public void clear() {
+            mSize = 0;
+        }
+
+        @SuppressWarnings("unchecked")
+        public T get(int index) {
+            if (index < 0 || index >= mSize) {
+                throw new IndexOutOfBoundsException();
+            }
+            return (T) mArray[index];
+        }
+
+        @SuppressWarnings("unchecked")
+        public T remove(int index) {
+            if (index < 0 || index >= mSize) {
+                throw new IndexOutOfBoundsException();
+            }
+            T item = (T) mArray[index];
+            for (int i = index; i < mSize - 1; ++i) {
+                mArray[i] = mArray[i + 1];
+            }
+            --mSize;
+            return item;
+        }
+
+        public int size() {
+            return mSize;
+        }
+
+    }
+
+    /**
+     * Holder for shadow vertex information.
+     */
+    private class ShadowVertex {
+        public double mPenumbraColor;
+        public double mPenumbraX;
+        public double mPenumbraY;
+        public double mPosX;
+        public double mPosY;
+        public double mPosZ;
+    }
+
+    /**
+     * Holder for vertex information.
+     */
+    private class Vertex {
+        public int mColor;
+        public float mColorFactor;
+        public double mPenumbraX;
+        public double mPenumbraY;
+        public double mPosX;
+        public double mPosY;
+        public double mPosZ;
+        public double mTexX;
+        public double mTexY;
+
+        public Vertex() {
+            mPosX = mPosY = mPosZ = mTexX = mTexY = 0;
+            mColorFactor = 1.0f;
+        }
+
+        public void rotateZ(double theta) {
+            double cos = Math.cos(theta);
+            double sin = Math.sin(theta);
+            double x = mPosX * cos + mPosY * sin;
+            double y = mPosX * -sin + mPosY * cos;
+            mPosX = x;
+            mPosY = y;
+            double px = mPenumbraX * cos + mPenumbraY * sin;
+            double py = mPenumbraX * -sin + mPenumbraY * cos;
+            mPenumbraX = px;
+            mPenumbraY = py;
+        }
+
+        public void set(Vertex vertex) {
+            mPosX = vertex.mPosX;
+            mPosY = vertex.mPosY;
+            mPosZ = vertex.mPosZ;
+            mTexX = vertex.mTexX;
+            mTexY = vertex.mTexY;
+            mPenumbraX = vertex.mPenumbraX;
+            mPenumbraY = vertex.mPenumbraY;
+            mColor = vertex.mColor;
+            mColorFactor = vertex.mColorFactor;
+        }
+
+        public void translate(double dx, double dy) {
+            mPosX += dx;
+            mPosY += dy;
+        }
+    }
+}

app/src/main/java/io/legado/app/ui/book/read/page/delegate/curl/CurlPage.java

@@ -0,0 +1,195 @@
+package io.legado.app.ui.book.read.page.delegate.curl;
+
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.RectF;
+
+/**
+ * Storage class for page textures, blend colors and possibly some other values
+ * in the future.
+ *
+ * @author harism
+ */
+public class CurlPage {
+
+    public static final int SIDE_BACK = 2;
+    public static final int SIDE_BOTH = 3;
+    public static final int SIDE_FRONT = 1;
+
+    private int mColorBack;
+    private int mColorFront;
+    private Bitmap mTextureBack;
+    private Bitmap mTextureFront;
+    private boolean mTexturesChanged;
+
+    /**
+     * Default constructor.
+     */
+    public CurlPage() {
+        reset();
+    }
+
+    /**
+     * Getter for color.
+     */
+    public int getColor(int side) {
+        switch (side) {
+            case SIDE_FRONT:
+                return mColorFront;
+            default:
+                return mColorBack;
+        }
+    }
+
+    /**
+     * Calculates the next highest power of two for a given integer.
+     */
+    private int getNextHighestPO2(int n) {
+        n -= 1;
+        n = n | (n >> 1);
+        n = n | (n >> 2);
+        n = n | (n >> 4);
+        n = n | (n >> 8);
+        n = n | (n >> 16);
+        n = n | (n >> 32);
+        return n + 1;
+    }
+
+    /**
+     * Generates nearest power of two sized Bitmap for give Bitmap. Returns this
+     * new Bitmap using default return statement + original texture coordinates
+     * are stored into RectF.
+     */
+    private Bitmap getTexture(Bitmap bitmap, RectF textureRect) {
+        // Bitmap original size.
+        int w = bitmap.getWidth();
+        int h = bitmap.getHeight();
+        // Bitmap size expanded to next power of two. This is done due to
+        // the requirement on many devices, texture width and height should
+        // be power of two.
+        int newW = getNextHighestPO2(w);
+        int newH = getNextHighestPO2(h);
+
+        // TODO: Is there another way to create a bigger Bitmap and copy
+        // original Bitmap to it more efficiently? Immutable bitmap anyone?
+        Bitmap bitmapTex = Bitmap.createBitmap(newW, newH, bitmap.getConfig());
+        Canvas c = new Canvas(bitmapTex);
+        c.drawBitmap(bitmap, 0, 0, null);
+
+        // Calculate final texture coordinates.
+        float texX = (float) w / newW;
+        float texY = (float) h / newH;
+        textureRect.set(0f, 0f, texX, texY);
+
+        return bitmapTex;
+    }
+
+    /**
+     * Getter for textures. Creates Bitmap sized to nearest power of two, copies
+     * original Bitmap into it and returns it. RectF given as parameter is
+     * filled with actual texture coordinates in this new upscaled texture
+     * Bitmap.
+     */
+    public Bitmap getTexture(RectF textureRect, int side) {
+        switch (side) {
+            case SIDE_FRONT:
+                return getTexture(mTextureFront, textureRect);
+            default:
+                return getTexture(mTextureBack, textureRect);
+        }
+    }
+
+    /**
+     * Returns true if textures have changed.
+     */
+    public boolean getTexturesChanged() {
+        return mTexturesChanged;
+    }
+
+    /**
+     * Returns true if back siding texture exists and it differs from front
+     * facing one.
+     */
+    public boolean hasBackTexture() {
+        return !mTextureFront.equals(mTextureBack);
+    }
+
+    /**
+     * Recycles and frees underlying Bitmaps.
+     */
+    public void recycle() {
+        if (mTextureFront != null) {
+            mTextureFront.recycle();
+        }
+        mTextureFront = Bitmap.createBitmap(1, 1, Bitmap.Config.RGB_565);
+        mTextureFront.eraseColor(mColorFront);
+        if (mTextureBack != null) {
+            mTextureBack.recycle();
+        }
+        mTextureBack = Bitmap.createBitmap(1, 1, Bitmap.Config.RGB_565);
+        mTextureBack.eraseColor(mColorBack);
+        mTexturesChanged = false;
+    }
+
+    /**
+     * Resets this CurlPage into its initial state.
+     */
+    public void reset() {
+        mColorBack = Color.WHITE;
+        mColorFront = Color.WHITE;
+        recycle();
+    }
+
+    /**
+     * Setter blend color.
+     */
+    public void setColor(int color, int side) {
+        switch (side) {
+            case SIDE_FRONT:
+                mColorFront = color;
+                break;
+            case SIDE_BACK:
+                mColorBack = color;
+                break;
+            default:
+                mColorFront = mColorBack = color;
+                break;
+        }
+    }
+
+    /**
+     * Setter for textures.
+     */
+    public void setTexture(Bitmap texture, int side) {
+        if (texture == null) {
+            texture = Bitmap.createBitmap(1, 1, Bitmap.Config.RGB_565);
+            if (side == SIDE_BACK) {
+                texture.eraseColor(mColorBack);
+            } else {
+                texture.eraseColor(mColorFront);
+            }
+        }
+        switch (side) {
+            case SIDE_FRONT:
+                if (mTextureFront != null)
+                    mTextureFront.recycle();
+                mTextureFront = texture;
+                break;
+            case SIDE_BACK:
+                if (mTextureBack != null)
+                    mTextureBack.recycle();
+                mTextureBack = texture;
+                break;
+            case SIDE_BOTH:
+                if (mTextureFront != null)
+                    mTextureFront.recycle();
+                if (mTextureBack != null)
+                    mTextureBack.recycle();
+                mTextureFront = mTextureBack = texture;
+                break;
+        }
+        mTexturesChanged = true;
+    }
+
+}

app/src/main/java/io/legado/app/ui/book/read/page/provider/ImageProvider.kt

@@ -3,7 +3,7 @@ package io.legado.app.ui.book.read.page.provider
 import android.graphics.Bitmap
 import io.legado.app.data.entities.Book
 import io.legado.app.help.BookHelp
-import io.legado.app.model.localBook.EPUBFile
+import io.legado.app.model.localBook.EpubFile
 import io.legado.app.utils.BitmapUtils
 import io.legado.app.utils.FileUtils
 import kotlinx.coroutines.runBlocking
@@ -36,7 +36,7 @@ object ImageProvider {
         val vFile = BookHelp.getImage(book, src)
         if (!vFile.exists()) {
             if (book.isEpub()) {
-                EPUBFile.getImage(book, src)?.use { input ->
+                EpubFile.getImage(book, src)?.use { input ->
                     val newFile = FileUtils.createFileIfNotExist(vFile.absolutePath)
                     FileOutputStream(newFile).use { output ->
                         input.copyTo(output)

app/src/main/java/io/legado/app/ui/config/BackupRestoreUi.kt

@@ -3,14 +3,14 @@ package io.legado.app.ui.config
 import android.app.Activity.RESULT_OK
 import android.content.Intent
 import android.net.Uri
-import androidx.activity.result.contract.ActivityResultContracts
 import androidx.documentfile.provider.DocumentFile
 import androidx.fragment.app.Fragment
 import io.legado.app.R
-import io.legado.app.constant.Permissions
 import io.legado.app.constant.PreferKey
 import io.legado.app.help.AppConfig
 import io.legado.app.help.coroutine.Coroutine
+import io.legado.app.help.permission.Permissions
+import io.legado.app.help.permission.PermissionsCompat
 import io.legado.app.help.storage.Backup
 import io.legado.app.help.storage.BookWebDav
 import io.legado.app.help.storage.ImportOldData
@@ -56,14 +56,18 @@ object BackupRestoreUi {
         fragment: Fragment,
         path: String
     ) {
-        fragment.registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) {
+        PermissionsCompat.Builder(fragment)
+            .addPermissions(*Permissions.Group.STORAGE)
+            .rationale(R.string.tip_perm_request_storage)
+            .onGranted {
                 Coroutine.async {
                     AppConfig.backupPath = path
                     Backup.backup(fragment.requireContext(), path)
                 }.onSuccess {
                     fragment.toastOnUi(R.string.backup_success)
                 }
-        }.launch(Permissions.Group.STORAGE)
+            }
+            .request()
     }
 
     fun selectBackupFolder(fragment: Fragment, requestCode: Int = selectFolderRequestCode) {
@@ -99,13 +103,17 @@ object BackupRestoreUi {
     }
 
     private fun restoreUsePermission(fragment: Fragment, path: String) {
-        fragment.registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) {
+        PermissionsCompat.Builder(fragment)
+            .addPermissions(*Permissions.Group.STORAGE)
+            .rationale(R.string.tip_perm_request_storage)
+            .onGranted {
                 Coroutine.async {
                     AppConfig.backupPath = path
                     Restore.restoreDatabase(path)
                     Restore.restoreConfig(path)
                 }
-        }.launch(Permissions.Group.STORAGE)
+            }
+            .request()
     }
 
     fun importOldData(fragment: Fragment) {

app/src/main/java/io/legado/app/ui/config/OtherConfigFragment.kt

@@ -10,18 +10,18 @@ import android.net.Uri
 import android.os.Bundle
 import android.os.Process
 import android.view.View
-import androidx.activity.result.contract.ActivityResultContracts
 import androidx.documentfile.provider.DocumentFile
 import androidx.preference.ListPreference
 import androidx.preference.Preference
 import io.legado.app.R
 import io.legado.app.base.BasePreferenceFragment
 import io.legado.app.constant.EventBus
-import io.legado.app.constant.Permissions
 import io.legado.app.constant.PreferKey
 import io.legado.app.databinding.DialogEditTextBinding
 import io.legado.app.help.AppConfig
 import io.legado.app.help.BookHelp
+import io.legado.app.help.permission.Permissions
+import io.legado.app.help.permission.PermissionsCompat
 import io.legado.app.lib.dialogs.alert
 import io.legado.app.lib.dialogs.selector
 import io.legado.app.lib.theme.ATH
@@ -224,7 +224,13 @@ class OtherConfigFragment : BasePreferenceFragment(),
                 } ?: toastOnUi("获取文件出错")
             }
         } else {
-            registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) {
+            PermissionsCompat.Builder(this)
+                .addPermissions(
+                    Permissions.READ_EXTERNAL_STORAGE,
+                    Permissions.WRITE_EXTERNAL_STORAGE
+                )
+                .rationale(R.string.bg_image_per)
+                .onGranted {
                     RealPathUtil.getPath(requireContext(), uri)?.let { path ->
                         val imgFile = File(path)
                         if (imgFile.exists()) {
@@ -235,7 +241,8 @@ class OtherConfigFragment : BasePreferenceFragment(),
                             CoverImageView.upDefaultCover()
                         }
                     }
-            }.launch(Permissions.Group.STORAGE)
+                }
+                .request()
         }
     }
 

app/src/main/java/io/legado/app/ui/config/ThemeConfigFragment.kt

@@ -1,6 +1,8 @@
 package io.legado.app.ui.config
 
 import android.annotation.SuppressLint
+import android.app.Activity
+import android.content.Intent
 import android.content.SharedPreferences
 import android.net.Uri
 import android.os.Build
@@ -9,19 +11,19 @@ import android.view.Menu
 import android.view.MenuInflater
 import android.view.MenuItem
 import android.view.View
-import androidx.activity.result.contract.ActivityResultContracts
 import androidx.documentfile.provider.DocumentFile
 import androidx.preference.Preference
 import io.legado.app.R
 import io.legado.app.base.BasePreferenceFragment
 import io.legado.app.constant.AppConst
 import io.legado.app.constant.EventBus
-import io.legado.app.constant.Permissions
 import io.legado.app.constant.PreferKey
 import io.legado.app.databinding.DialogEditTextBinding
 import io.legado.app.help.AppConfig
 import io.legado.app.help.LauncherIconHelp
 import io.legado.app.help.ThemeConfig
+import io.legado.app.help.permission.Permissions
+import io.legado.app.help.permission.PermissionsCompat
 import io.legado.app.lib.dialogs.alert
 import io.legado.app.lib.dialogs.selector
 import io.legado.app.lib.theme.ATH
@@ -36,17 +38,8 @@ import java.io.File
 class ThemeConfigFragment : BasePreferenceFragment(),
     SharedPreferences.OnSharedPreferenceChangeListener {
 
-    private val setLightBgImage = registerForActivityResult(ActivityResultContracts.GetContent()) {
+    private val requestCodeBgImage = 234
-        setBgFromUri(it, PreferKey.bgImage) {
+    private val requestCodeBgImageN = 342
-            upTheme(false)
-        }
-    }
-
-    private val setDarkBgImage = registerForActivityResult(ActivityResultContracts.GetContent()) {
-        setBgFromUri(it, PreferKey.bgImageN) {
-            upTheme(false)
-        }
-    }
 
     override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
         addPreferencesFromResource(R.xml.pref_config_theme)
@@ -193,26 +186,26 @@ class ThemeConfigFragment : BasePreferenceFragment(),
             "themeList" -> ThemeListDialog().show(childFragmentManager, "themeList")
             "saveDayTheme", "saveNightTheme" -> saveThemeAlert(key)
             PreferKey.bgImage -> if (getPrefString(PreferKey.bgImage).isNullOrEmpty()) {
-                setLightBgImage.launch("image/*")
+                selectImage(requestCodeBgImage)
             } else {
                 selector(items = arrayListOf("删除图片", "选择图片")) { _, i ->
                     if (i == 0) {
                         removePref(PreferKey.bgImage)
                         upTheme(false)
                     } else {
-                        setLightBgImage.launch("image/*")
+                        selectImage(requestCodeBgImage)
                     }
                 }
             }
             PreferKey.bgImageN -> if (getPrefString(PreferKey.bgImageN).isNullOrEmpty()) {
-                setDarkBgImage.launch("image/*")
+                selectImage(requestCodeBgImageN)
             } else {
                 selector(items = arrayListOf("删除图片", "选择图片")) { _, i ->
                     if (i == 0) {
                         removePref(PreferKey.bgImageN)
                         upTheme(true)
                     } else {
-                        setDarkBgImage.launch("image/*")
+                        selectImage(requestCodeBgImageN)
                     }
                 }
             }
@@ -220,6 +213,13 @@ class ThemeConfigFragment : BasePreferenceFragment(),
         return super.onPreferenceTreeClick(preference)
     }
 
+    private fun selectImage(requestCode: Int) {
+        val intent = Intent(Intent.ACTION_GET_CONTENT)
+        intent.addCategory(Intent.CATEGORY_OPENABLE)
+        intent.type = "image/*"
+        startActivityForResult(intent, requestCode)
+    }
+
     @SuppressLint("InflateParams")
     private fun saveThemeAlert(key: String) {
         alert(R.string.theme_name) {
@@ -279,7 +279,13 @@ class ThemeConfigFragment : BasePreferenceFragment(),
                 } ?: toastOnUi("获取文件出错")
             }
         } else {
-            registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) {
+            PermissionsCompat.Builder(this)
+                .addPermissions(
+                    Permissions.READ_EXTERNAL_STORAGE,
+                    Permissions.WRITE_EXTERNAL_STORAGE
+                )
+                .rationale(R.string.bg_image_per)
+                .onGranted {
                     RealPathUtil.getPath(requireContext(), uri)?.let { path ->
                         val imgFile = File(path)
                         if (imgFile.exists()) {
@@ -291,7 +297,28 @@ class ThemeConfigFragment : BasePreferenceFragment(),
                             success()
                         }
                     }
-            }.launch(Permissions.Group.STORAGE)
+                }
+                .request()
+        }
+    }
+
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        super.onActivityResult(requestCode, resultCode, data)
+        when (requestCode) {
+            requestCodeBgImage -> if (resultCode == Activity.RESULT_OK) {
+                data?.data?.let { uri ->
+                    setBgFromUri(uri, PreferKey.bgImage) {
+                        upTheme(false)
+                    }
+                }
+            }
+            requestCodeBgImageN -> if (resultCode == Activity.RESULT_OK) {
+                data?.data?.let { uri ->
+                    setBgFromUri(uri, PreferKey.bgImageN) {
+                        upTheme(true)
+                    }
+                }
+            }
         }
     }
 

app/src/main/java/io/legado/app/ui/filepicker/FilePicker.kt

@@ -2,11 +2,11 @@ package io.legado.app.ui.filepicker
 
 import android.content.Intent
 import android.os.Build
-import androidx.activity.result.contract.ActivityResultContracts
 import androidx.appcompat.app.AppCompatActivity
 import androidx.fragment.app.Fragment
 import io.legado.app.R
-import io.legado.app.constant.Permissions
+import io.legado.app.help.permission.Permissions
+import io.legado.app.help.permission.PermissionsCompat
 import io.legado.app.lib.dialogs.alert
 
 @Suppress("unused")
@@ -247,15 +247,23 @@ object FilePicker {
     }
 
     private fun checkPermissions(fragment: Fragment, success: (() -> Unit)? = null) {
-        fragment.registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) {
+        PermissionsCompat.Builder(fragment)
+            .addPermissions(*Permissions.Group.STORAGE)
+            .rationale(R.string.tip_perm_request_storage)
+            .onGranted {
                 success?.invoke()
-        }.launch(Permissions.Group.STORAGE)
+            }
+            .request()
     }
 
     private fun checkPermissions(activity: AppCompatActivity, success: (() -> Unit)? = null) {
-        activity.registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) {
+        PermissionsCompat.Builder(activity)
+            .addPermissions(*Permissions.Group.STORAGE)
+            .rationale(R.string.tip_perm_request_storage)
+            .onGranted {
                 success?.invoke()
-        }.launch(Permissions.Group.STORAGE)
+            }
+            .request()
     }
 
     private fun typesOfExtensions(allowExtensions: Array<String>): Array<String> {

app/src/main/java/io/legado/app/ui/filepicker/FilePickerDialog.kt

@@ -8,6 +8,7 @@ import android.view.LayoutInflater
 import android.view.MenuItem
 import android.view.View
 import android.view.ViewGroup
+import androidx.activity.result.contract.ActivityResultContracts
 import androidx.appcompat.widget.Toolbar
 import androidx.fragment.app.DialogFragment
 import androidx.fragment.app.FragmentManager
@@ -15,6 +16,7 @@ import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import io.legado.app.R
 import io.legado.app.databinding.DialogFileChooserBinding
+import io.legado.app.help.permission.Permissions
 import io.legado.app.lib.theme.primaryColor
 import io.legado.app.ui.filepicker.adapter.FileAdapter
 import io.legado.app.ui.filepicker.adapter.PathAdapter
@@ -69,7 +71,19 @@ class FilePickerDialog : DialogFragment(),
     override var isShowHomeDir: Boolean = false
     override var isShowUpDir: Boolean = true
     override var isShowHideDir: Boolean = false
-
+    private val queryPermission =
+        registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) {
+            var hasPermission = true
+            it.forEach { (t, u) ->
+                if (!u) {
+                    hasPermission = false
+                    toastOnUi(t)
+                }
+            }
+            if (hasPermission) {
+                refreshCurrentDirPath(initPath)
+            }
+        }
     private var requestCode: Int = 0
     var title: String? = null
     private var initPath = FileUtils.getSdCardPath()
@@ -118,7 +132,7 @@ class FilePickerDialog : DialogFragment(),
         }
         initMenu()
         initContentView()
-        refreshCurrentDirPath(initPath)
+        queryPermission.launch(Permissions.Group.STORAGE)
     }
 
     private fun initMenu() {

app/src/main/java/io/legado/app/ui/widget/font/FontSelectDialog.kt

@@ -8,16 +8,16 @@ import android.view.LayoutInflater
 import android.view.MenuItem
 import android.view.View
 import android.view.ViewGroup
-import androidx.activity.result.contract.ActivityResultContracts
 import androidx.appcompat.widget.Toolbar
 import androidx.documentfile.provider.DocumentFile
 import androidx.recyclerview.widget.LinearLayoutManager
 import io.legado.app.R
 import io.legado.app.base.BaseDialogFragment
-import io.legado.app.constant.Permissions
 import io.legado.app.constant.PreferKey
 import io.legado.app.databinding.DialogFontSelectBinding
 import io.legado.app.help.AppConfig
+import io.legado.app.help.permission.Permissions
+import io.legado.app.help.permission.PermissionsCompat
 import io.legado.app.lib.dialogs.alert
 import io.legado.app.lib.theme.primaryColor
 import io.legado.app.ui.filepicker.FilePicker
@@ -162,9 +162,13 @@ class FontSelectDialog : BaseDialogFragment(),
     }
 
     private fun loadFontFilesByPermission(path: String) {
-        registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) {
+        PermissionsCompat.Builder(this@FontSelectDialog)
+            .addPermissions(*Permissions.Group.STORAGE)
+            .rationale(R.string.tip_perm_request_storage)
+            .onGranted {
                 loadFontFiles(path)
-        }.launch(Permissions.Group.STORAGE)
+            }
+            .request()
     }
 
     private fun loadFontFiles(path: String) {

avd.bat

@@ -0,0 +1 @@
+emulator -avd %1 -dns-server 8.8.8.8 -no-snapshot-load

avd11.bat

@@ -1 +0,0 @@
-emulator -avd android11 -dns-server 8.8.8.8 -no-snapshot-load

epublib/src/main/java/me/ag2s/epublib/browsersupport/NavigationEvent.java

@@ -1,9 +1,10 @@
 package me.ag2s.epublib.browsersupport;
 
-import me.ag2s.epublib.domain.Book;
+import java.util.EventObject;
+
+import me.ag2s.epublib.domain.EpubBook;
 import me.ag2s.epublib.domain.Resource;
 import me.ag2s.epublib.util.StringUtil;
-import java.util.EventObject;
 
 /**
  * Used to tell NavigationEventListener just what kind of navigation action
@@ -19,7 +20,7 @@ public class NavigationEvent extends EventObject {
   private Resource oldResource;
   private int oldSpinePos;
   private Navigator navigator;
-  private Book oldBook;
+  private EpubBook oldBook;
   private int oldSectionPos;
   private String oldFragmentId;
 
@@ -59,7 +60,7 @@ public class NavigationEvent extends EventObject {
     this.oldFragmentId = oldFragmentId;
   }
 
-  public Book getOldBook() {
+  public EpubBook getOldBook() {
     return oldBook;
   }
 
@@ -122,11 +123,11 @@ public class NavigationEvent extends EventObject {
   }
 
 
-  public void setOldBook(Book oldBook) {
+  public void setOldBook(EpubBook oldBook) {
     this.oldBook = oldBook;
   }
 
-  public Book getCurrentBook() {
+  public EpubBook getCurrentBook() {
     return getNavigator().getBook();
   }
 

epublib/src/main/java/me/ag2s/epublib/browsersupport/NavigationHistory.java

@@ -1,15 +1,15 @@
 package me.ag2s.epublib.browsersupport;
 
-import me.ag2s.epublib.domain.Book;
-import me.ag2s.epublib.domain.Resource;
 import java.util.ArrayList;
 import java.util.List;
 
+import me.ag2s.epublib.domain.EpubBook;
+import me.ag2s.epublib.domain.Resource;
+
 /**
  * A history of the user's locations with the epub.
  *
  * @author paul.siegmann
- *
  */
 public class NavigationHistory implements NavigationEventListener {
 
@@ -58,7 +58,7 @@ public class NavigationHistory implements NavigationEventListener {
     return currentSize;
   }
 
-  public void initBook(Book book) {
+  public void initBook(EpubBook book) {
     if (book == null) {
       return;
     }

epublib/src/main/java/me/ag2s/epublib/browsersupport/Navigator.java

@@ -1,11 +1,12 @@
 package me.ag2s.epublib.browsersupport;
 
-import me.ag2s.epublib.domain.Book;
-import me.ag2s.epublib.domain.Resource;
 import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
 
+import me.ag2s.epublib.domain.EpubBook;
+import me.ag2s.epublib.domain.Resource;
+
 /**
  * A helper class for epub browser applications.
  *
@@ -18,7 +19,7 @@ import java.util.List;
 public class Navigator implements Serializable {
 
   private static final long serialVersionUID = 1076126986424925474L;
-  private Book book;
+  private EpubBook book;
   private int currentSpinePos;
   private Resource currentResource;
   private int currentPagePos;
@@ -30,7 +31,7 @@ public class Navigator implements Serializable {
     this(null);
   }
 
-  public Navigator(Book book) {
+  public Navigator(EpubBook book) {
     this.book = book;
     this.currentSpinePos = 0;
     if (book != null) {
@@ -158,7 +159,7 @@ public class Navigator implements Serializable {
     return gotoSpineSection(book.getSpine().size() - 1, source);
   }
 
-  public void gotoBook(Book book, Object source) {
+  public void gotoBook(EpubBook book, Object source) {
     NavigationEvent navigationEvent = new NavigationEvent(source, this);
     this.book = book;
     this.currentFragmentId = null;
@@ -193,7 +194,7 @@ public class Navigator implements Serializable {
     this.currentResource = book.getSpine().getResource(currentIndex);
   }
 
-  public Book getBook() {
+  public EpubBook getBook() {
     return book;
   }
 

epublib/src/main/java/me/ag2s/epublib/domain/EpubBook.java

@@ -39,7 +39,7 @@ import java.util.Map;
  * @author paul
  * @author jake
  */
-public class Book implements Serializable {
+public class EpubBook implements Serializable {
 
   private static final long serialVersionUID = 2068355170895770100L;
 

epublib/src/main/java/me/ag2s/epublib/epub/BookProcessor.java

@@ -1,6 +1,6 @@
 package me.ag2s.epublib.epub;
 
-import me.ag2s.epublib.domain.Book;
+import me.ag2s.epublib.domain.EpubBook;
 
 /**
  * Post-processes a book.
@@ -16,5 +16,5 @@ public interface BookProcessor {
    */
   BookProcessor IDENTITY_BOOKPROCESSOR = book -> book;
 
-  Book processBook(Book book);
+  EpubBook processBook(EpubBook book);
 }

epublib/src/main/java/me/ag2s/epublib/epub/BookProcessorPipeline.java

@@ -2,15 +2,17 @@ package me.ag2s.epublib.epub;
 
 import android.util.Log;
 
-import me.ag2s.epublib.domain.Book;
-//import io.documentnode.minilog.Logger;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
 
+import me.ag2s.epublib.domain.EpubBook;
+
+//import io.documentnode.minilog.Logger;
+
 /**
  * A book processor that combines several other bookprocessors
- *
+ * <p>
  * Fixes coverpage/coverimage.
  * Cleans up the XHTML.
  *
@@ -30,7 +32,7 @@ public class BookProcessorPipeline implements BookProcessor {
   }
 
   @Override
-  public Book processBook(Book book) {
+  public EpubBook processBook(EpubBook book) {
     if (bookProcessors == null) {
       return book;
     }

epublib/src/main/java/me/ag2s/epublib/epub/EpubReader.java

@@ -2,15 +2,9 @@ package me.ag2s.epublib.epub;
 
 import android.util.Log;
 
-import me.ag2s.epublib.Constants;
+import org.w3c.dom.Document;
-import me.ag2s.epublib.domain.Book;
+import org.w3c.dom.Element;
-import me.ag2s.epublib.domain.MediaType;
+
-import me.ag2s.epublib.domain.Resource;
-import me.ag2s.epublib.domain.Resources;
-import me.ag2s.epublib.domain.MediaTypes;
-import me.ag2s.epublib.util.ResourceUtil;
-import me.ag2s.epublib.util.StringUtil;
-//import io.documentnode.minilog.Logger;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.Arrays;
@@ -18,8 +12,16 @@ import java.util.List;
 import java.util.zip.ZipFile;
 import java.util.zip.ZipInputStream;
 
-import org.w3c.dom.Document;
+import me.ag2s.epublib.Constants;
-import org.w3c.dom.Element;
+import me.ag2s.epublib.domain.EpubBook;
+import me.ag2s.epublib.domain.MediaType;
+import me.ag2s.epublib.domain.MediaTypes;
+import me.ag2s.epublib.domain.Resource;
+import me.ag2s.epublib.domain.Resources;
+import me.ag2s.epublib.util.ResourceUtil;
+import me.ag2s.epublib.util.StringUtil;
+
+//import io.documentnode.minilog.Logger;
 
 /**
  * Reads an epub file.
@@ -32,15 +34,15 @@ public class EpubReader {
   private static String TAG= EpubReader.class.getName();
   private BookProcessor bookProcessor = BookProcessor.IDENTITY_BOOKPROCESSOR;
 
-  public Book readEpub(InputStream in) throws IOException {
+  public EpubBook readEpub(InputStream in) throws IOException {
     return readEpub(in, Constants.CHARACTER_ENCODING);
   }
 
-  public Book readEpub(ZipInputStream in) throws IOException {
+  public EpubBook readEpub(ZipInputStream in) throws IOException {
     return readEpub(in, Constants.CHARACTER_ENCODING);
   }
 
-  public Book readEpub(ZipFile zipfile) throws IOException {
+  public EpubBook readEpub(ZipFile zipfile) throws IOException {
     return readEpub(zipfile, Constants.CHARACTER_ENCODING);
   }
 
@@ -52,7 +54,7 @@ public class EpubReader {
    * @return the Book as read from the inputstream
    * @throws IOException
    */
-  public Book readEpub(InputStream in, String encoding) throws IOException {
+  public EpubBook readEpub(InputStream in, String encoding) throws IOException {
     return readEpub(new ZipInputStream(in), encoding);
   }
 
@@ -62,21 +64,20 @@ public class EpubReader {
    *
    * @param zipFile  the file to load
    * @param encoding the encoding for XHTML files
-   *
    * @return this Book without loading all resources into memory.
    * @throws IOException
    */
-  public Book readEpubLazy(ZipFile zipFile, String encoding)
+  public EpubBook readEpubLazy(ZipFile zipFile, String encoding)
           throws IOException {
     return readEpubLazy(zipFile, encoding,
             Arrays.asList(MediaTypes.mediaTypes));
   }
 
-  public Book readEpub(ZipInputStream in, String encoding) throws IOException {
+  public EpubBook readEpub(ZipInputStream in, String encoding) throws IOException {
     return readEpub(ResourcesLoader.loadResources(in, encoding));
   }
 
-  public Book readEpub(ZipFile in, String encoding) throws IOException {
+  public EpubBook readEpub(ZipFile in, String encoding) throws IOException {
     return readEpub(ResourcesLoader.loadResources(in, encoding));
   }
 
@@ -89,20 +90,20 @@ public class EpubReader {
    * @return this Book without loading all resources into memory.
    * @throws IOException
    */
-  public Book readEpubLazy(ZipFile zipFile, String encoding,
+  public EpubBook readEpubLazy(ZipFile zipFile, String encoding,
                                List<MediaType> lazyLoadedTypes) throws IOException {
     Resources resources = ResourcesLoader
             .loadResources(zipFile, encoding, lazyLoadedTypes);
     return readEpub(resources);
   }
 
-  public Book readEpub(Resources resources) throws IOException {
+  public EpubBook readEpub(Resources resources) throws IOException {
-    return readEpub(resources, new Book());
+    return readEpub(resources, new EpubBook());
   }
 
-  public Book readEpub(Resources resources, Book result) throws IOException {
+  public EpubBook readEpub(Resources resources, EpubBook result) throws IOException {
     if (result == null) {
-      result = new Book();
+      result = new EpubBook();
     }
     handleMimeType(result, resources);
     String packageResourceHref = getPackageResourceHref(resources);
@@ -116,20 +117,20 @@ public class EpubReader {
   }
 
 
-  private Book postProcessBook(Book book) {
+  private EpubBook postProcessBook(EpubBook book) {
     if (bookProcessor != null) {
       book = bookProcessor.processBook(book);
     }
     return book;
   }
 
-  private Resource processNcxResource(Resource packageResource, Book book) {
+  private Resource processNcxResource(Resource packageResource, EpubBook book) {
     Log.d(TAG, "OPF:getHref()" + packageResource.getHref());
 
     return NCXDocument.read(book, this);
   }
 
-  private Resource processPackageResource(String packageResourceHref, Book book,
+  private Resource processPackageResource(String packageResourceHref, EpubBook book,
                                           Resources resources) {
     Resource packageResource = resources.remove(packageResourceHref);
     try {
@@ -163,7 +164,7 @@ public class EpubReader {
     return result;
   }
 
-  private void handleMimeType(Book result, Resources resources) {
+  private void handleMimeType(EpubBook result, Resources resources) {
     resources.remove("mimetype");
   }
 }

epublib/src/main/java/me/ag2s/epublib/epub/EpubWriter.java

@@ -2,11 +2,8 @@ package me.ag2s.epublib.epub;
 
 import android.util.Log;
 
-import me.ag2s.epublib.domain.Book;
+import org.xmlpull.v1.XmlSerializer;
-import me.ag2s.epublib.domain.MediaTypes;
+
-import me.ag2s.epublib.domain.Resource;
-import me.ag2s.epublib.util.IOUtil;
-//import io.documentnode.minilog.Logger;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
@@ -15,7 +12,13 @@ import java.io.Writer;
 import java.util.zip.CRC32;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipOutputStream;
-import org.xmlpull.v1.XmlSerializer;
+
+import me.ag2s.epublib.domain.EpubBook;
+import me.ag2s.epublib.domain.MediaTypes;
+import me.ag2s.epublib.domain.Resource;
+import me.ag2s.epublib.util.IOUtil;
+
+//import io.documentnode.minilog.Logger;
 
 /**
  * Generates an epub file. Not thread-safe, single use object.
@@ -41,7 +44,7 @@ public class EpubWriter {
   }
 
 
-  public void write(Book book, OutputStream out) throws IOException {
+  public void write(EpubBook book, OutputStream out) throws IOException {
     book = processBook(book);
     ZipOutputStream resultStream = new ZipOutputStream(out);
     writeMimeType(resultStream);
@@ -52,14 +55,14 @@ public class EpubWriter {
     resultStream.close();
   }
 
-  private Book processBook(Book book) {
+  private EpubBook processBook(EpubBook book) {
     if (bookProcessor != null) {
       book = bookProcessor.processBook(book);
     }
     return book;
   }
 
-  private void initTOCResource(Book book) {
+  private void initTOCResource(EpubBook book) {
     Resource tocResource;
     try {
       tocResource = NCXDocument.createNCXResource(book);
@@ -77,7 +80,7 @@ public class EpubWriter {
   }
 
 
-  private void writeResources(Book book, ZipOutputStream resultStream)
+  private void writeResources(EpubBook book, ZipOutputStream resultStream)
           throws IOException {
     for (Resource resource : book.getResources().getAll()) {
       writeResource(resource, resultStream);
@@ -107,7 +110,7 @@ public class EpubWriter {
   }
 
 
-  private void writePackageDocument(Book book, ZipOutputStream resultStream)
+  private void writePackageDocument(EpubBook book, ZipOutputStream resultStream)
           throws IOException {
     resultStream.putNextEntry(new ZipEntry("OEBPS/content.opf"));
     XmlSerializer xmlSerializer = EpubProcessorSupport

epublib/src/main/java/me/ag2s/epublib/epub/NCXDocument.java

@@ -2,31 +2,30 @@ package me.ag2s.epublib.epub;
 
 import android.util.Log;
 
+import org.w3c.dom.Element;
+import org.w3c.dom.NodeList;
+import org.xmlpull.v1.XmlSerializer;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.UnsupportedEncodingException;
+import java.net.URLDecoder;
+import java.util.List;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipOutputStream;
+
 import me.ag2s.epublib.Constants;
 import me.ag2s.epublib.domain.Author;
-import me.ag2s.epublib.domain.Book;
+import me.ag2s.epublib.domain.EpubBook;
 import me.ag2s.epublib.domain.Identifier;
 import me.ag2s.epublib.domain.MediaTypes;
 import me.ag2s.epublib.domain.Resource;
 import me.ag2s.epublib.domain.TOCReference;
 import me.ag2s.epublib.domain.TableOfContents;
-import me.ag2s.epublib.util.ResourceUtil;
 import me.ag2s.epublib.util.StringUtil;
+
 //import io.documentnode.minilog.Logger;
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-import java.io.UnsupportedEncodingException;
-import java.net.URLDecoder;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.zip.ZipEntry;
-import java.util.zip.ZipOutputStream;
 //import javax.xml.stream.FactoryConfigurationError;
-import org.w3c.dom.Document;
-import org.w3c.dom.Element;
-import org.w3c.dom.Node;
-import org.w3c.dom.NodeList;
-import org.xmlpull.v1.XmlSerializer;
 
 /**
  * Writes the ncx document as defined by namespace http://www.daisy.org/z3986/2005/ncx/
@@ -75,7 +74,7 @@ public class NCXDocument {
 
     }
 
-    public static Resource read(Book book, EpubReader epubReader) {
+    public static Resource read(EpubBook book, EpubReader epubReader) {
         Log.d(TAG, book.getVersion());
         String version = book.getVersion();
         if (version.startsWith("2.")) {
@@ -89,7 +88,7 @@ public class NCXDocument {
     }
 
     private static List<TOCReference> readTOCReferences(NodeList navpoints,
-                                                        Book book) {
+                                                        EpubBook book) {
         Log.d(TAG, book.getVersion());
         String version = book.getVersion();
         if (version.startsWith("2.")) {
@@ -102,7 +101,7 @@ public class NCXDocument {
 
     }
 
-    static TOCReference readTOCReference(Element navpointElement, Book book) {
+    static TOCReference readTOCReference(Element navpointElement, EpubBook book) {
         Log.d(TAG, book.getVersion());
         String version = book.getVersion();
         if (version.startsWith("2.")) {
@@ -138,7 +137,7 @@ public class NCXDocument {
     }
 
 
-    public static void write(EpubWriter epubWriter, Book book,
+    public static void write(EpubWriter epubWriter, EpubBook book,
                              ZipOutputStream resultStream) throws IOException {
         resultStream
                 .putNextEntry(new ZipEntry(book.getSpine().getTocResource().getHref()));
@@ -158,13 +157,13 @@ public class NCXDocument {
      * @throws IllegalArgumentException
      * @1throws FactoryConfigurationError
      */
-    public static void write(XmlSerializer xmlSerializer, Book book)
+    public static void write(XmlSerializer xmlSerializer, EpubBook book)
             throws IllegalArgumentException, IllegalStateException, IOException {
         write(xmlSerializer, book.getMetadata().getIdentifiers(), book.getTitle(),
                 book.getMetadata().getAuthors(), book.getTableOfContents());
     }
 
-    public static Resource createNCXResource(Book book)
+    public static Resource createNCXResource(EpubBook book)
             throws IllegalArgumentException, IllegalStateException, IOException {
         return createNCXResource(book.getMetadata().getIdentifiers(),
                 book.getTitle(), book.getMetadata().getAuthors(),

epublib/src/main/java/me/ag2s/epublib/epub/NCXDocumentV2.java

@@ -19,7 +19,7 @@ import java.util.zip.ZipOutputStream;
 
 import me.ag2s.epublib.Constants;
 import me.ag2s.epublib.domain.Author;
-import me.ag2s.epublib.domain.Book;
+import me.ag2s.epublib.domain.EpubBook;
 import me.ag2s.epublib.domain.Identifier;
 import me.ag2s.epublib.domain.MediaTypes;
 import me.ag2s.epublib.domain.Resource;
@@ -75,7 +75,7 @@ public class NCXDocumentV2 extends NCXDocument{
 
   }
 
-  public static Resource read(Book book, EpubReader epubReader) {
+  public static Resource read(EpubBook book, EpubReader epubReader) {
     Resource ncxResource = null;
     if (book.getSpine().getTocResource() == null) {
       Log.e(TAG, "Book does not contain a table of contents file");
@@ -102,7 +102,7 @@ public class NCXDocumentV2 extends NCXDocument{
   }
 
   static List<TOCReference> readTOCReferences(NodeList navpoints,
-                                              Book book) {
+                                              EpubBook book) {
     if (navpoints == null) {
       return new ArrayList<>();
     }
@@ -122,7 +122,7 @@ public class NCXDocumentV2 extends NCXDocument{
     return result;
   }
 
-  static TOCReference readTOCReference(Element navpointElement, Book book) {
+  static TOCReference readTOCReference(Element navpointElement, EpubBook book) {
     String label = readNavLabel(navpointElement);
     //Log.d(TAG,"label:"+label);
     String tocResourceRoot = StringUtil
@@ -174,7 +174,7 @@ public class NCXDocumentV2 extends NCXDocument{
   }
 
 
-  public static void write(EpubWriter epubWriter, Book book,
+  public static void write(EpubWriter epubWriter, EpubBook book,
                            ZipOutputStream resultStream) throws IOException {
     resultStream
             .putNextEntry(new ZipEntry(book.getSpine().getTocResource().getHref()));
@@ -195,13 +195,13 @@ public class NCXDocumentV2 extends NCXDocument{
    * @throws IllegalStateException
    * @throws IllegalArgumentException
    */
-  public static void write(XmlSerializer xmlSerializer, Book book)
+  public static void write(XmlSerializer xmlSerializer, EpubBook book)
           throws IllegalArgumentException, IllegalStateException, IOException {
     write(xmlSerializer, book.getMetadata().getIdentifiers(), book.getTitle(),
             book.getMetadata().getAuthors(), book.getTableOfContents());
   }
 
-  public static Resource createNCXResource(Book book)
+  public static Resource createNCXResource(EpubBook book)
           throws IllegalArgumentException, IllegalStateException, IOException {
     return createNCXResource(book.getMetadata().getIdentifiers(),
             book.getTitle(), book.getMetadata().getAuthors(),

epublib/src/main/java/me/ag2s/epublib/epub/NCXDocumentV3.java

@@ -6,22 +6,14 @@ import org.w3c.dom.Document;
 import org.w3c.dom.Element;
 import org.w3c.dom.Node;
 import org.w3c.dom.NodeList;
-import org.xmlpull.v1.XmlSerializer;
 
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
 import java.io.UnsupportedEncodingException;
 import java.net.URLDecoder;
 import java.util.ArrayList;
 import java.util.List;
-import java.util.zip.ZipEntry;
-import java.util.zip.ZipOutputStream;
 
 import me.ag2s.epublib.Constants;
-import me.ag2s.epublib.domain.Author;
+import me.ag2s.epublib.domain.EpubBook;
-import me.ag2s.epublib.domain.Book;
-import me.ag2s.epublib.domain.Identifier;
-import me.ag2s.epublib.domain.MediaTypes;
 import me.ag2s.epublib.domain.Resource;
 import me.ag2s.epublib.domain.TOCReference;
 import me.ag2s.epublib.domain.TableOfContents;
@@ -69,7 +61,7 @@ public class NCXDocumentV3 extends NCXDocument {
 
     }
 
-    public static Resource read(Book book, EpubReader epubReader) {
+    public static Resource read(EpubBook book, EpubReader epubReader) {
         Resource ncxResource = null;
         if (book.getSpine().getTocResource() == null) {
             Log.e(TAG, "Book does not contain a table of contents file");
@@ -99,7 +91,7 @@ public class NCXDocumentV3 extends NCXDocument {
         return ncxResource;
     }
 
-    public static List<TOCReference> doToc(Node n, Book book) {
+    public static List<TOCReference> doToc(Node n, EpubBook book) {
         List<TOCReference> result = new ArrayList<>();
 
         if (n == null || n.getNodeType() != Document.ELEMENT_NODE) {
@@ -118,7 +110,7 @@ public class NCXDocumentV3 extends NCXDocument {
 
 
     static List<TOCReference> readTOCReferences(NodeList navpoints,
-                                                Book book) {
+                                                EpubBook book) {
         if (navpoints == null) {
             return new ArrayList<>();
         }
@@ -146,7 +138,7 @@ public class NCXDocumentV3 extends NCXDocument {
     }
 
 
-    static TOCReference readTOCReference(Element navpointElement, Book book) {
+    static TOCReference readTOCReference(Element navpointElement, EpubBook book) {
         String label = readNavLabel(navpointElement);
         //Log.d(TAG, "label:" + label);
         String tocResourceRoot = StringUtil

epublib/src/main/java/me/ag2s/epublib/epub/PackageDocumentMetadataWriter.java

@@ -1,16 +1,19 @@
 package me.ag2s.epublib.epub;
 
+import org.xmlpull.v1.XmlSerializer;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+
+import javax.xml.namespace.QName;
+
 import me.ag2s.epublib.Constants;
 import me.ag2s.epublib.domain.Author;
-import me.ag2s.epublib.domain.Book;
 import me.ag2s.epublib.domain.Date;
+import me.ag2s.epublib.domain.EpubBook;
 import me.ag2s.epublib.domain.Identifier;
 import me.ag2s.epublib.util.StringUtil;
-import java.io.IOException;
-import java.util.List;
-import java.util.Map;
-import javax.xml.namespace.QName;
-import org.xmlpull.v1.XmlSerializer;
 
 public class PackageDocumentMetadataWriter extends PackageDocumentBase {
 
@@ -23,7 +26,7 @@ public class PackageDocumentMetadataWriter extends PackageDocumentBase {
    * @throws IllegalStateException
    * @throws IllegalArgumentException
    */
-  public static void writeMetaData(Book book, XmlSerializer serializer)
+  public static void writeMetaData(EpubBook book, XmlSerializer serializer)
           throws IllegalArgumentException, IllegalStateException, IOException {
     serializer.startTag(NAMESPACE_OPF, OPFTags.metadata);
     serializer.setPrefix(PREFIX_DUBLIN_CORE, NAMESPACE_DUBLIN_CORE);

epublib/src/main/java/me/ag2s/epublib/epub/PackageDocumentReader.java

@@ -1,21 +1,12 @@
 package me.ag2s.epublib.epub;
 
 import android.util.Log;
-import android.widget.Toast;
 
-import me.ag2s.epublib.Constants;
+import org.w3c.dom.Document;
-import me.ag2s.epublib.domain.Book;
+import org.w3c.dom.Element;
-import me.ag2s.epublib.domain.Guide;
+import org.w3c.dom.NodeList;
-import me.ag2s.epublib.domain.GuideReference;
+import org.xml.sax.SAXException;
-import me.ag2s.epublib.domain.MediaType;
+
-import me.ag2s.epublib.domain.Resource;
-import me.ag2s.epublib.domain.Resources;
-import me.ag2s.epublib.domain.Spine;
-import me.ag2s.epublib.domain.SpineReference;
-import me.ag2s.epublib.domain.MediaTypes;
-import me.ag2s.epublib.util.ResourceUtil;
-import me.ag2s.epublib.util.StringUtil;
-//import io.documentnode.minilog.Logger;
 import java.io.IOException;
 import java.io.UnsupportedEncodingException;
 import java.net.URLDecoder;
@@ -27,11 +18,23 @@ import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
+
 import javax.xml.parsers.ParserConfigurationException;
-import org.w3c.dom.Document;
+
-import org.w3c.dom.Element;
+import me.ag2s.epublib.Constants;
-import org.w3c.dom.NodeList;
+import me.ag2s.epublib.domain.EpubBook;
-import org.xml.sax.SAXException;
+import me.ag2s.epublib.domain.Guide;
+import me.ag2s.epublib.domain.GuideReference;
+import me.ag2s.epublib.domain.MediaType;
+import me.ag2s.epublib.domain.MediaTypes;
+import me.ag2s.epublib.domain.Resource;
+import me.ag2s.epublib.domain.Resources;
+import me.ag2s.epublib.domain.Spine;
+import me.ag2s.epublib.domain.SpineReference;
+import me.ag2s.epublib.util.ResourceUtil;
+import me.ag2s.epublib.util.StringUtil;
+
+//import io.documentnode.minilog.Logger;
 
 /**
  * Reads the opf package document as defined by namespace http://www.idpf.org/2007/opf
@@ -47,7 +50,7 @@ public class PackageDocumentReader extends PackageDocumentBase {
 
 
   public static void read(
-      Resource packageResource, EpubReader epubReader, Book book,
+          Resource packageResource, EpubReader epubReader, EpubBook book,
           Resources resources)
       throws UnsupportedEncodingException, SAXException, IOException, ParserConfigurationException {
     Document packageDocument = ResourceUtil.getAsDocument(packageResource);
@@ -151,7 +154,7 @@ public class PackageDocumentReader extends PackageDocumentBase {
    * @param resources
    */
   private static void readGuide(Document packageDocument,
-      EpubReader epubReader, Book book, Resources resources) {
+                                EpubReader epubReader, EpubBook book, Resources resources) {
     Element guideElement = DOMUtil
             .getFirstElementByTagNameNS(packageDocument.getDocumentElement(),
                     NAMESPACE_OPF, OPFTags.guide);
@@ -400,11 +403,12 @@ public class PackageDocumentReader extends PackageDocumentBase {
   /**
    * Finds the cover resource in the packageDocument and adds it to the book if found.
    * Keeps the cover resource in the resources map
+   *
    * @param packageDocument
    * @param book
    * @1param resources
    */
-  private static void readCover(Document packageDocument, Book book) {
+  private static void readCover(Document packageDocument, EpubBook book) {
 
     Collection<String> coverHrefs = findCoverHrefs(packageDocument);
     for (String coverHref : coverHrefs) {

epublib/src/main/java/me/ag2s/epublib/epub/PackageDocumentWriter.java

@@ -2,24 +2,26 @@ package me.ag2s.epublib.epub;
 
 import android.util.Log;
 
+import org.xmlpull.v1.XmlSerializer;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+
 import me.ag2s.epublib.Constants;
-import me.ag2s.epublib.domain.Book;
+import me.ag2s.epublib.domain.EpubBook;
 import me.ag2s.epublib.domain.Guide;
 import me.ag2s.epublib.domain.GuideReference;
 import me.ag2s.epublib.domain.MediaTypes;
 import me.ag2s.epublib.domain.Resource;
 import me.ag2s.epublib.domain.Spine;
 import me.ag2s.epublib.domain.SpineReference;
-import me.ag2s.epublib.util.ResourceUtil;
 import me.ag2s.epublib.util.StringUtil;
+
 //import io.documentnode.minilog.Logger;
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.Comparator;
-import java.util.List;
 //import javax.xml.stream.XMLStreamException;
-import org.xmlpull.v1.XmlSerializer;
 
 /**
  * Writes the opf package document as defined by namespace http://www.idpf.org/2007/opf
@@ -33,7 +35,7 @@ public class PackageDocumentWriter extends PackageDocumentBase {
   private static String TAG= PackageDocumentWriter.class.getName();
 
   public static void write(EpubWriter epubWriter, XmlSerializer serializer,
-      Book book) throws IOException {
+                           EpubBook book) throws IOException {
     try {
       serializer.startDocument(Constants.CHARACTER_ENCODING, false);
       serializer.setPrefix(PREFIX_OPF, NAMESPACE_OPF);
@@ -71,7 +73,7 @@ public class PackageDocumentWriter extends PackageDocumentBase {
    * @throws IllegalArgumentException
    * 1@throws XMLStreamException
    */
-  private static void writeSpine(Book book, EpubWriter epubWriter,
+  private static void writeSpine(EpubBook book, EpubWriter epubWriter,
                                  XmlSerializer serializer)
           throws IllegalArgumentException, IllegalStateException, IOException {
     serializer.startTag(NAMESPACE_OPF, OPFTags.spine);
@@ -98,7 +100,7 @@ public class PackageDocumentWriter extends PackageDocumentBase {
   }
 
 
-  private static void writeManifest(Book book, EpubWriter epubWriter,
+  private static void writeManifest(EpubBook book, EpubWriter epubWriter,
                                     XmlSerializer serializer)
           throws IllegalArgumentException, IllegalStateException, IOException {
     serializer.startTag(NAMESPACE_OPF, OPFTags.manifest);
@@ -122,7 +124,7 @@ public class PackageDocumentWriter extends PackageDocumentBase {
     serializer.endTag(NAMESPACE_OPF, OPFTags.manifest);
   }
 
-  private static List<Resource> getAllResourcesSortById(Book book) {
+  private static List<Resource> getAllResourcesSortById(EpubBook book) {
     List<Resource> allResources = new ArrayList<Resource>(
             book.getResources().getAll());
     Collections.sort(allResources, new Comparator<Resource>() {
@@ -137,14 +139,14 @@ public class PackageDocumentWriter extends PackageDocumentBase {
 
   /**
    * Writes a resources as an item element
+   *
    * @param resource
    * @param serializer
    * @throws IOException
    * @throws IllegalStateException
-   * @throws IllegalArgumentException
+   * @throws IllegalArgumentException 1@throws XMLStreamException
-   * 1@throws XMLStreamException
    */
-  private static void writeItem(Book book, Resource resource,
+  private static void writeItem(EpubBook book, Resource resource,
                                 XmlSerializer serializer)
           throws IllegalArgumentException, IllegalStateException, IOException {
     if (resource == null ||
@@ -206,7 +208,7 @@ public class PackageDocumentWriter extends PackageDocumentBase {
     }
   }
 
-  private static void writeGuide(Book book, EpubWriter epubWriter,
+  private static void writeGuide(EpubBook book, EpubWriter epubWriter,
                                  XmlSerializer serializer)
           throws IllegalArgumentException, IllegalStateException, IOException {
     serializer.startTag(NAMESPACE_OPF, OPFTags.guide);

settings.gradle

@@ -1,2 +1 @@
-include ':app'
+include ':app',':epublib'
-include ':epublib'