重新安装应用后没有权限的本地书籍会提示选择文件所在文件夹,不需要重新添加

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

@@ -29,7 +29,7 @@ object LocalBook {
         FileUtils.createFolderIfNotExist(appCtx.externalFiles, folderName)
     }
 
-    @Throws(FileNotFoundException::class)
+    @Throws(FileNotFoundException::class, SecurityException::class)
     fun getBookInputStream(book: Book): InputStream {
         if (book.bookUrl.isContentScheme()) {
             val uri = Uri.parse(book.bookUrl)

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

@@ -29,6 +29,7 @@ import io.legado.app.model.ReadBook
 import io.legado.app.ui.book.read.config.BgTextConfigDialog
 import io.legado.app.ui.book.read.config.ClickActionConfigDialog
 import io.legado.app.ui.book.read.config.PaddingConfigDialog
+import io.legado.app.ui.document.HandleFileContract
 import io.legado.app.utils.*
 import io.legado.app.utils.viewbindingdelegate.viewBinding
 
@@ -41,6 +42,13 @@ abstract class BaseReadBookActivity :
     override val binding by viewBinding(ActivityBookReadBinding::inflate)
     override val viewModel by viewModels<ReadBookViewModel>()
     var bottomDialog = 0
+    private val selectBookFolderResult = registerForActivityResult(HandleFileContract()){
+        it.uri?.let {
+            ReadBook.book?.let { book ->
+                viewModel.loadChapterList(book)
+            }
+        } ?: ReadBook.upMsg("没有权限访问")
+    }
 
     override fun onCreate(savedInstanceState: Bundle?) {
         ReadBook.msg = null
@@ -51,6 +59,12 @@ abstract class BaseReadBookActivity :
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         binding.navigationBar.setBackgroundColor(bottomBackground)
+        viewModel.permissionDenialLiveData.observe(this) {
+            selectBookFolderResult.launch {
+                mode = HandleFileContract.SYS_DIR
+                title = "选择书籍所在文件夹"
+            }
+        }
         if (!LocalConfig.readHelpVersionIsLast) {
             showClickRegionalConfig()
         }

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

@@ -2,6 +2,7 @@ package io.legado.app.ui.book.read
 
 import android.app.Application
 import android.content.Intent
+import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.viewModelScope
 import io.legado.app.R
 import io.legado.app.base.BaseViewModel
@@ -30,6 +31,7 @@ import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.ensureActive
 
 class ReadBookViewModel(application: Application) : BaseViewModel(application) {
+    val permissionDenialLiveData = MutableLiveData<Int>()
     var isInitFinish = false
     var searchContentQuery = ""
     private var changeSourceCoroutine: Coroutine<*>? = null
@@ -121,7 +123,12 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
                     ReadBook.loadContent(resetPageOffset = true)
                 }
             }.onError {
-                ReadBook.upMsg("LoadTocError:${it.localizedMessage}")
+                when (it) {
+                    is SecurityException -> {
+                        permissionDenialLiveData.postValue(1)
+                    }
+                    else -> ReadBook.upMsg("LoadTocError:${it.localizedMessage}")
+                }
             }
         } else {
             ReadBook.bookSource?.let {

app/src/main/java/io/legado/app/ui/document/HandleFileActivity.kt

@@ -58,6 +58,7 @@ class HandleFileActivity :
         }
         val allowExtensions = intent.getStringArrayExtra("allowExtensions")
         val selectList: ArrayList<SelectItem<Int>> = when (mode) {
+            HandleFileContract.SYS_DIR -> getDirActions(true)
             HandleFileContract.DIR -> getDirActions()
             HandleFileContract.FILE -> getFileActions()
             HandleFileContract.EXPORT -> arrayListOf(
@@ -141,14 +142,14 @@ class HandleFileActivity :
         return null
     }
 
-    private fun getDirActions(): ArrayList<SelectItem<Int>> {
+    private fun getDirActions(onlySys: Boolean = false): ArrayList<SelectItem<Int>> {
-        return if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.Q) {
+        return if (Build.VERSION.SDK_INT > Build.VERSION_CODES.Q || onlySys) {
+            arrayListOf(SelectItem(getString(R.string.sys_folder_picker), HandleFileContract.DIR))
+        } else {
             arrayListOf(
                 SelectItem(getString(R.string.sys_folder_picker), HandleFileContract.DIR),
                 SelectItem(getString(R.string.app_folder_picker), 10)
             )
-        } else {
-            arrayListOf(SelectItem(getString(R.string.sys_folder_picker), HandleFileContract.DIR))
         }
     }
 

app/src/main/java/io/legado/app/ui/document/HandleFileContract.kt

@@ -46,6 +46,7 @@ class HandleFileContract :
     companion object {
         const val DIR = 0
         const val FILE = 1
+        const val SYS_DIR = 2
         const val EXPORT = 3
     }