优化

app/src/main/java/io/legado/app/help/glide/BlurTransformation.kt

@@ -3,7 +3,7 @@ package io.legado.app.help.glide
 import android.graphics.Bitmap
 import androidx.annotation.IntRange
 import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool
-import com.bumptech.glide.load.resource.bitmap.CenterCrop
+import com.bumptech.glide.load.resource.bitmap.BitmapTransformation
 import io.legado.app.utils.stackBlur
 import java.security.MessageDigest
 
@@ -13,7 +13,7 @@ import java.security.MessageDigest
  */
 class BlurTransformation(
     @IntRange(from = 0, to = 25) private val radius: Int
-) : CenterCrop() {
+) : BitmapTransformation() {
 
     override fun transform(
         pool: BitmapPool,
@@ -21,8 +21,7 @@ class BlurTransformation(
         outWidth: Int,
         outHeight: Int
     ): Bitmap {
-        val transform = super.transform(pool, toTransform, outWidth, outHeight)
+        return toTransform.stackBlur(radius)
-        return transform.stackBlur(radius)
     }
 
     override fun updateDiskCacheKey(messageDigest: MessageDigest) {

app/src/main/java/io/legado/app/model/BookCover.kt

@@ -5,6 +5,7 @@ import android.content.Context
 import android.graphics.drawable.BitmapDrawable
 import android.graphics.drawable.Drawable
 import com.bumptech.glide.RequestBuilder
+import com.bumptech.glide.load.resource.bitmap.CenterCrop
 import com.bumptech.glide.load.resource.drawable.DrawableTransitionOptions
 import com.bumptech.glide.request.RequestOptions
 import io.legado.app.R
@@ -86,14 +87,14 @@ object BookCover {
         loadOnlyWifi: Boolean = false
     ): RequestBuilder<Drawable> {
         val loadBlur = ImageLoader.load(context, defaultDrawable)
-            .transform(BlurTransformation(25))
+            .transform(BlurTransformation(25), CenterCrop())
         return if (AppConfig.useDefaultCover) {
             loadBlur
         } else {
             val options = RequestOptions().set(OkHttpModelLoader.loadOnlyWifiOption, loadOnlyWifi)
             ImageLoader.load(context, path)
                 .apply(options)
-                .transform(BlurTransformation(25))
+                .transform(BlurTransformation(25), CenterCrop())
                 .transition(DrawableTransitionOptions.withCrossFade(1500))
                 .thumbnail(loadBlur)
         }