Asynctask在doInBackground中取消后不会停止

我试图编写一个进度条，它会根据定时器（从0开始并上升到我选择的某个时间）增加。当我点击一个按钮时，进度条减小（从值[0] - 5减少）。当进度条值为30时，我想停止进度条，所以请停止asynctask，然后重新启动它，以便进度条值现在为0.Asynctask在doInBackground中取消后不会停止

我的代码没有任何错误，问题在于进度条不会停止并且不会重新启动。（我知道，因为我做了一个敬酒打印进度条的值，它从不停止）

这是我在MainActivity代码

公共类MainActivity扩展活动{

ProgressBar progressBar_eau; 

TextView txt; 
int compteur = 0; 

Button btn_arrosoir; 

MyTask task_eau; 
Boolean restart = true; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    btn_arrosoir = (Button) findViewById(R.id.btn_arrosoir);//my button when you click the progress bar decreases 
    progressBar_eau = (ProgressBar) findViewById(R.id.barre_eau); 
    progressBar_eau.setMax(30); 
    Drawable draw3=getResources().getDrawable(R.drawable.custom_eau); 
    progressBar_eau.setProgressDrawable(draw3); 

    progressBar_eau.setProgress(0); 

    task_eau = new MyTask(progressBar_eau); 
    task_eau.execute(300); 

    btn_arrosoir.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      //OnCLick Stuff 
      compteur = compteur - 5; 

     } 
    }); 

} 


public void cancelAsynctask(){ 
    if (restart == false){ 
     task_eau.cancel(true); 
     restartAsynctask(); 
     Toast.makeText(MainActivity.this, 
         "cancel", Toast.LENGTH_LONG).show(); 
     restart = true; 
    } 

} 

public void restartAsynctask(){ 
    task_eau = new MyTask(progressBar_lumiere); 
      task_eau.execute(300); 
      Toast.makeText(MainActivity.this, 
        "restart", Toast.LENGTH_LONG).show();//my emulator shows both message start and restart even though the progress bar doesn't stop 
} 

public class MyTask extends AsyncTask<Integer, Integer, String> { 

    ProgressBar progressBar_actuelle; 
    public MyTask(ProgressBar target) { 
     progressBar_actuelle = target; 

    } 


    @Override 
      protected String doInBackground(Integer... params) { 


      while (task_eau.isCancelled() == false){ 
       for (; count <= params[0]; count++) { 

        try { 
        Thread.sleep(1000); 
               publishProgress(count); 

              } catch (InterruptedException e) { 
               e.printStackTrace(); 
              } 
       } 
       } 

       return null; 
      } 

    @Override 
    protected void onPostExecute(String result) { 

    } 



    @Override 
    protected void onProgressUpdate(Integer... values) { 

     progressBar_actuelle.setProgress(values[0]+compteur); 

     if (progressBar_actuelle.getProgress() >= 30){ 
      restart = false; 
      cancelAsynctask(); 
     } 

    } 
}

}

来源

2017-03-08 Solene Gochard-Lezebot