diff --git a/app/src/main/java/io/legado/app/help/BookHelp.kt b/app/src/main/java/io/legado/app/help/BookHelp.kt
index febe400c2..dba76f97f 100644
--- a/app/src/main/java/io/legado/app/help/BookHelp.kt
+++ b/app/src/main/java/io/legado/app/help/BookHelp.kt
@@ -1,5 +1,6 @@
 package io.legado.app.help
 
+import android.net.Uri
 import io.legado.app.constant.AppPattern
 import io.legado.app.constant.EventBus
 import io.legado.app.data.appDb
@@ -21,9 +22,9 @@ import kotlin.math.max
 import kotlin.math.min
 
 object BookHelp {
-    const val cacheFolderName = "book_cache"
+    private const val cacheFolderName = "book_cache"
     private const val cacheImageFolderName = "images"
-    val downloadDir: File = appCtx.externalFilesDir
+    private val downloadDir: File = appCtx.externalFilesDir
     private val downloadImages = CopyOnWriteArraySet<String>()
 
     fun clearCache() {
@@ -55,6 +56,28 @@ object BookHelp {
         }
     }
 
+    fun getEpubFile(book: Book,): File {
+        val file = FileUtils.getFile(
+            downloadDir,
+            cacheFolderName,
+            book.getFolderName(),
+            "index.epubx"
+        )
+        if(!file.exists()){
+            val input = if (book.bookUrl.isContentScheme()) {
+                val uri = Uri.parse(book.bookUrl)
+                appCtx.contentResolver.openInputStream(uri)
+            } else {
+                File(book.bookUrl).inputStream()
+            }
+            if (input != null) {
+                FileUtils.writeInputStream(file, input)
+            }
+
+        }
+        return file
+    }
+
     suspend fun saveContent(book: Book, bookChapter: BookChapter, content: String) {
         if (content.isEmpty()) return
         //保存文本
diff --git a/app/src/main/java/io/legado/app/model/localBook/EpubFile.kt b/app/src/main/java/io/legado/app/model/localBook/EpubFile.kt
index 310f2263e..b80540f74 100644
--- a/app/src/main/java/io/legado/app/model/localBook/EpubFile.kt
+++ b/app/src/main/java/io/legado/app/model/localBook/EpubFile.kt
@@ -2,12 +2,14 @@ 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.data.entities.Book
 import io.legado.app.data.entities.BookChapter
 import io.legado.app.help.BookHelp
-import io.legado.app.utils.*
+import io.legado.app.utils.FileUtils
+import io.legado.app.utils.HtmlFormatter
+import io.legado.app.utils.MD5Utils
+import io.legado.app.utils.externalFilesDir
 import me.ag2s.epublib.domain.EpubBook
 import me.ag2s.epublib.epub.EpubReader
 import org.jsoup.Jsoup
@@ -27,6 +29,7 @@ class EpubFile(var book: Book) {
 
         @Synchronized
         private fun getEFile(book: Book): EpubFile {
+            BookHelp.getEpubFile(book)
             if (eFile == null || eFile?.book?.bookUrl != book.bookUrl) {
                 eFile = EpubFile(book)
                 return eFile!!
@@ -98,28 +101,8 @@ class EpubFile(var book: 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(): EpubBook? {
         try {
-            //f
-            val file = FileUtils.getFile(
-                BookHelp.downloadDir,
-                BookHelp.cacheFolderName,
-                book.getFolderName(),
-                "index.epubx"
-            )
-            if (!file.exists()) {
-                val input = if (book.bookUrl.isContentScheme()) {
-                    val uri = Uri.parse(book.bookUrl)
-                    appCtx.contentResolver.openInputStream(uri)
-                } else {
-                    File(book.bookUrl).inputStream()
-                }
-                input ?: return null
-                FileUtils.writeInputStream(file, input)
-                if (!file.exists()){
-                    return EpubReader().readEpub(input)
-                }
-
-            }
 
+            val file = BookHelp.getEpubFile(book)
             //通过懒加载读取epub
             return EpubReader().readEpubLazy(ZipFile(file), "utf-8")
 
diff --git a/app/src/main/java/io/legado/app/model/localBook/LocalBook.kt b/app/src/main/java/io/legado/app/model/localBook/LocalBook.kt
index a01efaee0..001cc93b5 100644
--- a/app/src/main/java/io/legado/app/model/localBook/LocalBook.kt
+++ b/app/src/main/java/io/legado/app/model/localBook/LocalBook.kt
@@ -138,6 +138,13 @@ object LocalBook {
                 val bookFile = FileUtils.getFile(cacheFolder, book.originName)
                 bookFile.delete()
             }
+            if(book.isEpub()){
+                val bookFile=BookHelp.getEpubFile(book).parentFile
+                if (bookFile!=null&&bookFile.exists()){
+                    FileUtils.delete(bookFile,true)
+                }
+
+            }
 
             if (deleteOriginal) {
                 if (book.bookUrl.isContentScheme()) {
diff --git a/app/src/main/java/io/legado/app/utils/BitmapUtils.kt b/app/src/main/java/io/legado/app/utils/BitmapUtils.kt
index 39d1e1534..bae066fe6 100644
--- a/app/src/main/java/io/legado/app/utils/BitmapUtils.kt
+++ b/app/src/main/java/io/legado/app/utils/BitmapUtils.kt
@@ -28,6 +28,7 @@ object BitmapUtils {
      */
     fun decodeBitmap(path: String, width: Int, height: Int): Bitmap? {
         val op = BitmapFactory.Options()
+        op.inPreferredConfig=Config.RGB_565
         var ips=FileInputStream(path)
         // inJustDecodeBounds如果设置为true,仅仅返回图片实际的宽和高,宽和高是赋值给opts.outWidth,opts.outHeight;
         op.inJustDecodeBounds = true
@@ -54,6 +55,7 @@ object BitmapUtils {
      */
     fun decodeBitmap(path: String): Bitmap? {
         val opts = BitmapFactory.Options()
+        opts.inPreferredConfig=Config.RGB_565
         var ips=FileInputStream(path)
         opts.inJustDecodeBounds = true
         BitmapFactory.decodeStream(ips,null,opts)
diff --git a/epublib/src/main/java/me/ag2s/epublib/util/IOUtil.java b/epublib/src/main/java/me/ag2s/epublib/util/IOUtil.java
index 0ce72d062..dcbda6830 100644
--- a/epublib/src/main/java/me/ag2s/epublib/util/IOUtil.java
+++ b/epublib/src/main/java/me/ag2s/epublib/util/IOUtil.java
@@ -450,7 +450,7 @@ public class IOUtil {
                 output.write(buffer, 0, n);
                 count += n;
             }
-            input.close();
+            //input.close();
         }
         return count;
     }