优化

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

@@ -22,6 +22,7 @@ import org.jsoup.Jsoup
 import org.jsoup.nodes.Element
 import org.jsoup.parser.Parser
 import org.jsoup.select.Elements
+import java.io.File
 import java.io.FileOutputStream
 import java.io.IOException
 import java.io.InputStream
@@ -95,6 +96,10 @@ class EpubFile(var book: Book) {
             return field
         }
 
+    init {
+        upBookCover(true)
+    }
+
     /**
      * 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
      */
@@ -249,12 +254,15 @@ class EpubFile(var book: Book) {
         return epubBook?.resources?.getByHref(abHref)?.inputStream
     }
 
-    private fun upBookCover() {
+    private fun upBookCover(fastCheck: Boolean = false) {
         try {
             epubBook?.let {
                 if (book.coverUrl.isNullOrEmpty()) {
                     book.coverUrl = LocalBook.getCoverPath(book)
                 }
+                if (fastCheck && File(book.coverUrl!!).exists()) {
+                    return
+                }
                 /*部分书籍DRM处理后，封面获取异常，待优化*/
                 it.coverImage?.inputStream?.use { input ->
                     val cover = BitmapFactory.decodeStream(input)

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

@@ -16,6 +16,7 @@ import io.legado.app.utils.FileUtils
 import io.legado.app.utils.HtmlFormatter
 import io.legado.app.utils.printOnDebug
 import org.jsoup.Jsoup
+import java.io.File
 import java.io.FileOutputStream
 import java.io.InputStream
 
@@ -70,6 +71,10 @@ class MobiFile(var book: Book) {
             return field
         }
 
+    init {
+        upBookCover(true)
+    }
+
     private fun readMobi(): MobiBook? {
         return kotlin.runCatching {
             BookHelp.getBookPFD(book)?.let {
@@ -266,12 +271,15 @@ class MobiFile(var book: Book) {
         return kf8Book.getResourceByHref(href)?.inputStream()
     }
 
-    private fun upBookCover() {
+    private fun upBookCover(fastCheck: Boolean = false) {
         try {
             mobiBook?.let {
                 if (book.coverUrl.isNullOrEmpty()) {
                     book.coverUrl = LocalBook.getCoverPath(book)
                 }
+                if (fastCheck && File(book.coverUrl!!).exists()) {
+                    return
+                }
                 it.getCover()?.let { bytes ->
                     val bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.size)
                     val file = FileUtils.createFileIfNotExist(book.coverUrl!!)

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

@@ -74,6 +74,10 @@ class PdfFile(var book: Book) {
             return field
         }
 
+    init {
+        upBookCover(true)
+    }
+
     /**
      * 读取PDF文件
      *
@@ -188,12 +192,15 @@ class PdfFile(var book: Book) {
         return chapterList
     }
 
-    private fun upBookCover() {
+    private fun upBookCover(fastCheck: Boolean = false) {
         try {
             pdfRenderer?.let { renderer ->
                 if (book.coverUrl.isNullOrEmpty()) {
                     book.coverUrl = LocalBook.getCoverPath(book)
                 }
+                if (fastCheck && File(book.coverUrl!!).exists()) {
+                    return
+                }
                 FileOutputStream(FileUtils.createFileIfNotExist(book.coverUrl!!)).use { out ->
                     openPdfPage(renderer, 0)?.compress(Bitmap.CompressFormat.JPEG, 90, out)
                     out.flush()

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

@@ -7,6 +7,7 @@ import io.legado.app.utils.FileUtils
 import io.legado.app.utils.printOnDebug
 import me.ag2s.umdlib.domain.UmdBook
 import me.ag2s.umdlib.umd.UmdReader
+import java.io.File
 import java.io.InputStream
 
 class UmdFile(var book: Book) {
@@ -58,17 +59,24 @@ class UmdFile(var book: Book) {
             return field
         }
 
+    init {
+        upBookCover(true)
+    }
+
     private fun readUmd(): UmdBook? {
         val input = LocalBook.getBookInputStream(book)
         return UmdReader().read(input)
     }
 
-    private fun upBookCover() {
+    private fun upBookCover(fastCheck: Boolean = false) {
         try {
             umdBook?.let {
                 if (book.coverUrl.isNullOrEmpty()) {
                     book.coverUrl = LocalBook.getCoverPath(book)
                 }
+                if (fastCheck && File(book.coverUrl!!).exists()) {
+                    return
+                }
                 FileUtils.writeBytes(book.coverUrl!!, it.cover.coverData)
             }
         } catch (e: Exception) {