epub封面完成

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

@@ -9,6 +9,7 @@ import io.legado.app.data.entities.ReplaceRule
 import io.legado.app.model.localBook.LocalBook
 import io.legado.app.utils.FileUtils
 import io.legado.app.utils.MD5Utils
+import io.legado.app.utils.externalFilesDir
 import io.legado.app.utils.postEvent
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.Dispatchers.Main
@@ -20,9 +21,7 @@ import kotlin.math.min
 
 object BookHelp {
     private const val cacheFolderName = "book_cache"
-    private val downloadDir: File =
-        App.INSTANCE.getExternalFilesDir(null)
-            ?: App.INSTANCE.cacheDir
+    private val downloadDir: File = App.INSTANCE.externalFilesDir
 
     private fun bookFolderName(book: Book): String {
         return formatFolderName(book.name) + MD5Utils.md5Encode16(book.bookUrl)

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

@@ -1,16 +1,18 @@
 package io.legado.app.model.localBook
 
+import android.graphics.Bitmap
+import android.graphics.BitmapFactory
 import android.net.Uri
 import android.text.TextUtils
 import io.legado.app.App
 import io.legado.app.data.entities.BookChapter
-import io.legado.app.utils.htmlFormat
-import io.legado.app.utils.isContentPath
+import io.legado.app.utils.*
 import nl.siegmann.epublib.domain.Book
 import nl.siegmann.epublib.domain.TOCReference
 import nl.siegmann.epublib.epub.EpubReader
 import org.jsoup.Jsoup
 import java.io.File
+import java.io.FileOutputStream
 import java.io.IOException
 import java.nio.charset.Charset
 import java.util.*
@@ -19,6 +21,7 @@ class EPUBFile(val book: io.legado.app.data.entities.Book) {
 
     companion object {
         private var eFile: EPUBFile? = null
+        private val coverDir = App.INSTANCE.externalFilesDir
 
         @Synchronized
         private fun getEFile(book: io.legado.app.data.entities.Book): EPUBFile {
@@ -53,7 +56,25 @@ class EPUBFile(val book: io.legado.app.data.entities.Book) {
                 File(book.bookUrl).inputStream()
             }
             epubBook = epubReader.readEpub(inputStream)
+            if (book.coverUrl.isNullOrEmpty()) {
+                book.coverUrl = FileUtils.getPath(
+                    App.INSTANCE.externalFilesDir,
+                    "${MD5Utils.md5Encode16(book.bookUrl)}.jpg",
+                    "covers"
+                )
+            }
+            if (!File(book.coverUrl!!).exists()) {
+                epubBook!!.coverImage?.inputStream?.let {
+                    val cover = BitmapFactory.decodeStream(it)
+                    val out = FileOutputStream(FileUtils.createFileIfNotExist(book.coverUrl!!))
+                    cover.compress(Bitmap.CompressFormat.JPEG, 90, out)
+                    out.flush()
+                    out.close()
+                    it.close()
+                }
+            }
         } catch (e: Exception) {
+            e.printStackTrace()
         }
     }
 

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

@@ -7,6 +7,8 @@ import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookChapter
 import io.legado.app.help.BookHelp
 import io.legado.app.utils.FileUtils
+import io.legado.app.utils.MD5Utils
+import io.legado.app.utils.externalFilesDir
 import io.legado.app.utils.isContentPath
 import java.io.File
 
@@ -57,7 +59,12 @@ object LocalBook {
             bookUrl = path,
             name = name,
             author = author,
-            originName = fileName
+            originName = fileName,
+            coverUrl = FileUtils.getPath(
+                App.INSTANCE.externalFilesDir,
+                "${MD5Utils.md5Encode16(path)}.jpg",
+                "covers"
+            )
         )
         App.db.bookDao().insert(book)
     }

app/src/main/java/io/legado/app/utils/ContextExtensions.kt

@@ -20,6 +20,7 @@ import androidx.core.content.edit
 import cn.bingoogolapple.qrcode.zxing.QRCodeEncoder
 import com.google.zxing.EncodeHintType
 import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel
+import io.legado.app.App
 import io.legado.app.BuildConfig
 import io.legado.app.R
 import org.jetbrains.anko.defaultSharedPreferences
@@ -157,7 +158,10 @@ val Context.sysBattery: Int
         val iFilter = IntentFilter(Intent.ACTION_BATTERY_CHANGED)
         val batteryStatus = registerReceiver(null, iFilter)
         return batteryStatus?.getIntExtra(BatteryManager.EXTRA_LEVEL, -1) ?: -1
-}
+    }
+
+val Context.externalFilesDir: File
+    get() = App.INSTANCE.getExternalFilesDir(null) ?: App.INSTANCE.filesDir
 
 fun Context.openUrl(url: String) {
     openUrl(Uri.parse(url))