优化

app/src/main/java/io/legado/app/ui/changecover/ChangeCoverViewModel.kt

@@ -22,10 +22,13 @@ class ChangeCoverViewModel(application: Application) : BaseViewModel(application
 
     fun initData() {
         execute {
-            App.db.searchBookDao().getEnableHasCover(name, author).let {
+            App.db.searchBookDao().getEnableHasCover(name, author)
+        }.onSuccess {
+            it?.let {
                 callBack?.adapter?.setItems(it)
-                search()
             }
+        }.onFinally {
+            search()
         }
     }
 

app/src/main/java/io/legado/app/ui/changecover/CoverAdapter.kt

@@ -16,6 +16,7 @@ class CoverAdapter(context: Context) :
         with(holder.itemView) {
             item.coverUrl?.let {
                 ImageLoader.load(context, it)
+                    .error(R.drawable.image_cover_default)
                     .centerCrop()
                     .into(iv_cover)
             }

app/src/main/res/layout/item_cover.xml

@@ -15,7 +15,6 @@
         android:layout_height="100dp"
         android:contentDescription="@string/img_cover"
         android:scaleType="centerCrop"
-        android:src="@drawable/image_cover_default"
         android:transitionName="img_cover"
         app:layout_constraintLeft_toLeftOf="parent"
         app:layout_constraintRight_toRightOf="parent"