优化

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

@@ -1,5 +1,6 @@
 package io.legado.app.help.book
 
+import android.os.ParcelFileDescriptor
 import androidx.documentfile.provider.DocumentFile
 import io.legado.app.constant.AppLog
 import io.legado.app.constant.AppPattern
@@ -198,6 +199,22 @@ object BookHelp {
         return ZipFile(uri.path)
     }
 
+    /**
+     * 获取本地书籍文件的ParcelFileDescriptor
+     *
+     * @param book
+     * @return
+     */
+    @Throws(IOException::class, FileNotFoundException::class)
+    fun getBookPFD(book: Book): ParcelFileDescriptor? {
+        val uri = book.getLocalUri()
+        return if (uri.isContentScheme()) {
+            appCtx.contentResolver.openFileDescriptor(uri, "r")
+        } else {
+            ParcelFileDescriptor.open(File(uri.path), ParcelFileDescriptor.MODE_READ_ONLY)
+        }
+    }
+
     fun getChapterFiles(book: Book): HashSet<String> {
         val fileNames = hashSetOf<String>()
         if (book.isLocalTxt) {

app/src/main/java/io/legado/app/help/glide/LegadoGlideModule.kt

@@ -8,10 +8,12 @@ import com.bumptech.glide.load.model.GlideUrl
 import com.bumptech.glide.module.AppGlideModule
 import java.io.InputStream
 
+
 @Suppress("unused")
 @GlideModule
 class LegadoGlideModule : AppGlideModule() {
 
+
     override fun registerComponents(context: Context, glide: Glide, registry: Registry) {
         registry.replace(
             GlideUrl::class.java,

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

@@ -2,6 +2,7 @@ package io.legado.app.model.localBook
 
 import android.graphics.Bitmap
 import android.graphics.BitmapFactory
+import android.os.ParcelFileDescriptor
 import android.text.TextUtils
 import io.legado.app.constant.AppLog
 import io.legado.app.data.entities.Book
@@ -12,6 +13,7 @@ import me.ag2s.epublib.domain.EpubBook
 import me.ag2s.epublib.domain.Resource
 import me.ag2s.epublib.domain.TOCReference
 import me.ag2s.epublib.epub.EpubReader
+import me.ag2s.epublib.util.zip.AndroidZipFile
 import org.jsoup.Jsoup
 import org.jsoup.nodes.Element
 import org.jsoup.select.Elements
@@ -65,9 +67,14 @@ class EpubFile(var book: Book) {
     }
 
     private var mCharset: Charset = Charset.defaultCharset()
+
+    /**
+     *持有引用，避免被回收
+     */
+    private var fileDescriptor: ParcelFileDescriptor? = null
     private var epubBook: EpubBook? = null
         get() {
-            if (field != null) {
+            if (field != null && fileDescriptor != null) {
                 return field
             }
             field = readEpub()
@@ -107,8 +114,14 @@ class EpubFile(var book: Book) {
     private fun readEpub(): EpubBook? {
         return kotlin.runCatching {
             //ContentScheme拷贝到私有文件夹采用懒加载防止OOM
-            val zipFile = BookHelp.getEpubFile(book)
-            EpubReader().readEpubLazy(zipFile, "utf-8")
+            //val zipFile = BookHelp.getEpubFile(book)
+            BookHelp.getBookPFD(book)?.let {
+                fileDescriptor = it
+                val zipFile = AndroidZipFile(it, book.originName)
+                EpubReader().readEpubLazy(zipFile, "utf-8")
+            }
+
+
         }.onFailure {
             AppLog.put("读取Epub文件失败\n${it.localizedMessage}", it)
             it.printOnDebug()
@@ -350,4 +363,9 @@ class EpubFile(var book: Book) {
         }
     }
 
+
+    protected fun finalize() {
+        fileDescriptor?.close()
+    }
+
 }

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

@@ -57,10 +57,13 @@ class PdfFile(var book: Book) {
 
     }
 
+    /**
+     *持有引用，避免被回收
+     */
     private var fileDescriptor: ParcelFileDescriptor? = null
     private var pdfRenderer: PdfRenderer? = null
         get() {
-            if (field != null) {
+            if (field != null && fileDescriptor != null) {
                 return field
             }
             field = readPdf()
@@ -180,7 +183,7 @@ class PdfFile(var book: Book) {
             val index = href.toInt()
             val bitmap = openPdfPage(pdfRenderer!!, index)
             if (bitmap != null) {
-                BitmapUtils.toInputStream(bitmap).also { bitmap.recycle() }
+                BitmapUtils.toInputStream(bitmap)
             } else {
                 null
             }