优化

app/src/main/java/io/legado/app/help/config/ReadBookConfig.kt

@@ -425,6 +425,7 @@ object ReadBookConfig {
                 }
                 if (config.bgType == 2) {
                     val bgName = FileUtils.getName(config.bgStr)
+                    config.bgStr = bgName
                     val bgPath = FileUtils.getPath(appCtx.externalFiles, "bg", bgName)
                     if (!FileUtils.exist(bgPath)) {
                         val bgFile = configDir.getFile(bgName)
@@ -436,6 +437,7 @@ object ReadBookConfig {
                 }
                 if (config.bgTypeNight == 2) {
                     val bgName = FileUtils.getName(config.bgStrNight)
+                    config.bgStrNight = bgName
                     val bgPath = FileUtils.getPath(appCtx.externalFiles, "bg", bgName)
                     if (!FileUtils.exist(bgPath)) {
                         val bgFile = configDir.getFile(bgName)
@@ -447,6 +449,7 @@ object ReadBookConfig {
                 }
                 if (config.bgTypeEInk == 2) {
                     val bgName = FileUtils.getName(config.bgStrEInk)
+                    config.bgStrEInk = bgName
                     val bgPath = FileUtils.getPath(appCtx.externalFiles, "bg", bgName)
                     if (!FileUtils.exist(bgPath)) {
                         val bgFile = configDir.getFile(bgName)
@@ -570,10 +573,12 @@ object ReadBookConfig {
                     bgTypeEInk = bgType
                     bgStrEInk = bg
                 }
+
                 AppConfig.isNightTheme -> {
                     bgTypeNight = bgType
                     bgStrNight = bg
                 }
+
                 else -> {
                     this.bgType = bgType
                     bgStr = bg
@@ -611,8 +616,13 @@ object ReadBookConfig {
                         val bitmap = BitmapUtils.decodeAssetsBitmap(appCtx, path, width, height)
                         BitmapDrawable(resources, bitmap?.resizeAndRecycle(width, height))
                     }
+
                     else -> {
-                        val bitmap = BitmapUtils.decodeBitmap(curBgStr(), width, height)
+                        val path = curBgStr().let {
+                            if (it.contains(File.separator)) it
+                            else FileUtils.getPath(appCtx.externalFiles, "bg", curBgStr())
+                        }
+                        val bitmap = BitmapUtils.decodeBitmap(path, width, height)
                         BitmapDrawable(resources, bitmap?.resizeAndRecycle(width, height))
                     }
                 }

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

@@ -367,7 +367,7 @@ class BgTextConfigDialog : BaseDialogFragment(R.layout.dialog_read_bg_text) {
                 FileOutputStream(file).use { outputStream ->
                     inputStream.copyTo(outputStream)
                 }
-                ReadBookConfig.durConfig.setCurBg(2, file.absolutePath)
+                ReadBookConfig.durConfig.setCurBg(2, fileName)
                 postEvent(EventBus.UP_CONFIG, false)
             }.onFailure {
                 appCtx.toastOnUi(it.localizedMessage)

app/src/main/java/io/legado/app/utils/FileUtils.kt

@@ -551,15 +551,15 @@ object FileUtils {
     /**
      * 获取文件或网址的名称（包括后缀）
      */
-    fun getName(pathOrUrl: String?): String {
+    fun getName(path: String?): String {
-        if (pathOrUrl == null) {
+        if (path == null) {
             return ""
         }
-        val pos = pathOrUrl.lastIndexOf('/')
+        val pos = path.lastIndexOf(File.separator)
         return if (0 <= pos) {
-            pathOrUrl.substring(pos + 1)
+            path.substring(pos + 1)
         } else {
-            System.currentTimeMillis().toString() + "." + getExtension(pathOrUrl)
+            path
         }
     }