优化

app/src/main/java/io/legado/app/help/coroutine/ActivelyCancelException.kt

@@ -0,0 +1,5 @@
+package io.legado.app.help.coroutine
+
+import kotlin.coroutines.cancellation.CancellationException
+
+class ActivelyCancelException : CancellationException()

app/src/main/java/io/legado/app/help/coroutine/Coroutine.kt

@@ -40,8 +40,6 @@ class Coroutine<T>(
     private var timeMillis: Long? = null
     private var errorReturn: Result<T>? = null
 
-    private var isCancelCalled = false
-
     val isCancelled: Boolean
         get() = job.isCancelled
 
@@ -116,8 +114,7 @@ class Coroutine<T>(
     }
 
     //取消当前任务
-    fun cancel(cause: CancellationException? = null) {
+    fun cancel(cause: ActivelyCancelException = ActivelyCancelException()) {
-        isCancelCalled = true
         job.cancel(cause)
         cancel?.let {
             MainScope().launch {
@@ -149,7 +146,7 @@ class Coroutine<T>(
                 success?.let { dispatchCallback(this, value, it) }
             } catch (e: Throwable) {
                 e.printOnDebug()
-                if (e is CancellationException && !isCancelCalled) this@Coroutine.cancel()
+                if (e is ActivelyCancelException) this@Coroutine.cancel()
                 if (e is CancellationException && e !is TimeoutCancellationException) {
                     return@launch
                 }