"Android Basics" Asynctask learning--How to cancel out Asynctask

In Asynctask, we have no way to stop the asynchronous task directly, only through the Cancel method to mark Asynctask as the cancel state, that is, the Cancel method simply passes a semaphore, instead of actually cancel the asynchronous task.
So if you want the Cancel method to cancel the asynchronous task directly, you need to detect the current state in Doinbackground: When the state is the cancel state, jump out of the loop immediately.

Using Cancel:

//将task的状态标记为cancel  if(task!=null&&    task.getStatus() == AsyncTask.Status.RUNNING){   task.cancel(true);  }

Detects whether the current status is cancel in an asynchronous task loop and, if cancel, ends the task directly:

 class testtask extends asynctask<Void,Integer,  Void>{@Overrideprotectedvoid Doinbackground (void ... params) {//TODO auto-generated method stub    for(intI=0;i< +; i++) {//If the current mark is cancel, jump out of the loop and return directly    if( This. iscancelled ()) {return NULL; }Try{Thread.Sleep ( -); }Catch(Interruptedexception e) {//TODO auto-generated catch blockE.printstacktrace (); }   }return NULL; } }

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"Android Basics" Asynctask learning--How to cancel out Asynctask