优化

app/src/main/java/io/legado/app/help/ThemeConfig.kt

@@ -59,7 +59,6 @@ object ThemeConfig {
         if (bgCfg.first.isNullOrBlank()) return null
         val bgImage = BitmapUtils
             .decodeBitmap(bgCfg.first!!, metrics.widthPixels, metrics.heightPixels)
-            ?: return null
         if (bgCfg.second == 0) {
             return bgImage
         }

app/src/main/java/io/legado/app/ui/book/read/page/provider/ImageProvider.kt

@@ -61,9 +61,7 @@ object ImageProvider {
                 ChapterProvider.visibleWidth,
                 ChapterProvider.visibleHeight
             )
-            if (bitmap != null) {
             setCache(chapterIndex, src, bitmap)
-            }
             bitmap
         } catch (e: Exception) {
             null

app/src/main/java/io/legado/app/ui/document/HandleFileContract.kt

@@ -52,7 +52,7 @@ class HandleFileContract :
         var title: String? = null,
         var allowExtensions: Array<String> = arrayOf(),
         var otherActions: ArrayList<SelectItem<Int>>? = null,
-        var fileData: Triple<String, ByteArray, String>? = null
+        var fileData: Triple<String, ByteArray, String>? = null,
     )
 
 }