优化

app/src/main/java/io/legado/app/base/adapter/ItemViewDelegate.kt

@@ -7,7 +7,7 @@ import android.content.Context
  *
  * item代理，
  */
-abstract class ItemViewDelegate<in ITEM>(protected val context: Context, val layoutId: Int) {
+abstract class ItemViewDelegate<ITEM>(protected val context: Context, val layoutId: Int) {
 
     abstract fun convert(holder: ItemViewHolder, item: ITEM, payloads: MutableList<Any>)
 

app/src/main/java/io/legado/app/model/webbook/SourceDebug.kt

@@ -23,8 +23,7 @@ class SourceDebug(private val webBook: WebBook, callback: Callback) {
         private val startTime: Long = System.currentTimeMillis()
 
         fun printLog(sourceUrl: String?, state: Int, msg: String, print: Boolean = true, isHtml: Boolean = false) {
-            if (debugSource != sourceUrl) return
-            if (!print) return
+            if (debugSource != sourceUrl || callback == null || !print) return
             var printMsg = msg
             if (isHtml) {
                 printMsg = printMsg.htmlFormat()
@@ -34,20 +33,20 @@ class SourceDebug(private val webBook: WebBook, callback: Callback) {
             callback?.printLog(state, printMsg)
         }
 
-        fun cancelDebug() {
+        fun cancelDebug(destroy: Boolean = false) {
             tasks.forEach {
                 if (!it.isCancelled) {
                     it.cancel()
                 }
             }
             tasks.clear()
-        }
 
-        fun stopDebug(){
-            cancelDebug()
-            debugSource = null
-            callback = null
+            if (destroy) {
+                debugSource = null
+                callback = null
+            }
         }
+
     }
 
     init {

app/src/main/java/io/legado/app/ui/sourcedebug/SourceDebugModel.kt

@@ -37,6 +37,6 @@ class SourceDebugModel(application: Application) : BaseViewModel(application), S
 
     override fun onCleared() {
         super.onCleared()
-        SourceDebug.stopDebug()
+        SourceDebug.cancelDebug(true)
     }
 }