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.graphics.BitmapFactory
 import android.os.ParcelFileDescriptor
 import androidx.documentfile.provider.DocumentFile
 import io.legado.app.constant.AppLog
@@ -16,6 +17,7 @@ import kotlinx.coroutines.*
 import kotlinx.coroutines.Dispatchers.IO
 import org.apache.commons.text.similarity.JaccardSimilarity
 import splitties.init.appCtx
+import java.io.ByteArrayInputStream
 import java.io.File
 import java.io.FileNotFoundException
 import java.io.FileOutputStream
@@ -147,6 +149,9 @@ object BookHelp {
             ImageUtils.decode(
                 src, bytes, isCover = false, bookSource, book
             )?.let {
+                if (!checkImage(bytes)) {
+                    AppLog.put("图片 $src 下载错误，数据异常")
+                }
                 FileUtils.createFileIfNotExist(
                     downloadDir,
                     cacheFolderName,
@@ -157,7 +162,7 @@ object BookHelp {
             }
         } catch (e: Exception) {
             e.printStackTrace()
-            AppLog.put("${src}下载错误", e)
+            AppLog.put("图片 $src 下载错误", e)
         } finally {
             downloadImages.remove(src)
         }
@@ -255,16 +260,40 @@ object BookHelp {
         if (!hasContent(book, bookChapter)) {
             return false
         }
+        var ret = true
+        val op = BitmapFactory.Options()
+        op.inJustDecodeBounds = true
         getContent(book, bookChapter)?.let {
             val matcher = AppPattern.imgPattern.matcher(it)
             while (matcher.find()) {
-                matcher.group(1)?.let { src ->
+                val src = matcher.group(1)!!
                 val image = getImage(book, src)
                 if (!image.exists()) {
-                        return false
+                    ret = false
+                    continue
+                }
+                if (SvgUtils.getSize(image.absolutePath) != null) {
+                    continue
+                }
+                BitmapFactory.decodeFile(image.absolutePath, op)
+                if (op.outWidth < 1 && op.outHeight < 1) {
+                    ret = false
+                    image.delete()
                 }
             }
         }
+        return ret
+    }
+
+    private fun checkImage(bytes: ByteArray): Boolean {
+        if (SvgUtils.getSize(ByteArrayInputStream(bytes)) != null) {
+            return true
+        }
+        val op = BitmapFactory.Options()
+        op.inJustDecodeBounds = true
+        BitmapFactory.decodeByteArray(bytes, 0, bytes.size, op)
+        if (op.outWidth < 1 && op.outHeight < 1) {
+            return false
         }
         return true
     }