Question

当线程运行进度条到达时，我的进度条从100变为0时需要停止线程和处理程序但是progressStatus值为负，请帮助我在进度条达到0后停止线程

 new Thread(runn =new Runnable() {
     public void run() {

         while (progressStatus <= 100) {
             progressStatus += doWork();
             try {
                 Thread.sleep(10);
             } catch (InterruptedException e) {
                 e.printStackTrace();
             }

             // Update the progress bar
             handler.post(runn1=new Runnable() {
                 public void run() {
                     bar.setProgress(progressStatus);
                     i=-1;                                                  
                     if(bar.getProgress()==0)
                     {
                        handler.removeCallbacks(runn); 
                        handler.removeCallbacks(runn1);
                         System.out.println("Reached");
                      congrats.setVisibility(View.VISIBLE);
                         restart.setVisibility(View.VISIBLE); 
                         rightbutton.setVisibility(View.GONE);
                         wrongbutton.setVisibility(View.GONE);

                     }
                 }
             });



         }



     }
     private int doWork() {

         return i;
      }

     }).start();

Answer 1

你的程序不是线程安全，你实际上是从两个不同的线程读取和编写变量(progressStatus)，你必须避免这样做，或者如果你想这样做，你必须使用{ {1}}阻止。为了解决您的问题，您可以这样做：

synchronized

我建议您采用另一种方式Thread t; progressStatus = 100; t = new Thread(runn =new Runnable() { public void run() { while (!Thread.currentThread().isInterrupted()) { try { Thread.sleep(10); } catch (InterruptedException e) { e.printStackTrace(); return; } // Update the progress bar handler.post(runn1=new Runnable() { public void run() { bar.setProgress(progressStatus); progressStatus=progressStatus-1; if(bar.getProgress()==0) { handler.removeCallbacks(runn); handler.removeCallbacks(runn1); System.out.println("Reached"); congrats.setVisibility(View.VISIBLE); restart.setVisibility(View.VISIBLE); rightbutton.setVisibility(View.GONE); wrongbutton.setVisibility(View.GONE); t.interrupt(); } } });使用函数ScheduledThreadPoolExecutor。类似的东西：

scheduleAtFixedRate(Runnable command, long initialDelay, long period, TimeUnit unit)

要关闭它，请使用final ScheduledThreadPoolExecutor myTimer = new ScheduledThreadPoolExecutor(1); myTimer.scheduleAtFixedRate(new Runnable() { @Override public void run() { getActivity().runOnUiThread(new Runnable(){ @Override public void run(){ } }); } } }, 0,10, TimeUnit.MILLISECONDS);

当进度条在android中达到0时我需要停止线程

1 个答案: