Question

我正在使用android开发。我有一个线程，我想恢复或停止取决于按钮按钮，但我不知道为什么我的线程不会恢复... 这是代码

public class MainActivity extends Activity {

private Thread clientThread;

Boolean running = true;

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

    clientThread = new Thread(new Client());
    clientThread.start();

}

@SuppressLint("NewApi")
class Client implements Runnable {

    @Override
    public void run() 
    { 
      try {
          while (running == true) {

          //get sensor data here

          if (fsensor3 > 200) 
          {
              running = false; //To stop thread from repeating
              new MyVoltageAlert().execute(fsensor3);
              //What do I do here?
          }

          runOnUiThread(new Runnable()
          {
              @Override
              public void run() {
                  //UI stuff here

              }
          });
          }

      }
      catch(Exception e){

          e.printStackTrace();
      }

    }


}//End Client Thread

class MyVoltageAlert extends AsyncTask<Integer, Void, Integer>{

    @Override
    protected Integer doInBackground(Integer... params){
        return params[0];
    }

    @Override
    protected void onPostExecute(Integer result) {
        super.onPostExecute(result);
        AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);

        builder.setMessage(result + "mv")
        .setTitle("Sensor Warning!");
        // Add the buttons
        builder.setPositiveButton("Continue", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                        //What do I do here?
                        // running = true;
                }
            });
        builder.setNegativeButton("Stop", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                        //What do I do here? 
                        // running = false;
                }
            });

     // Create the AlertDialog
     AlertDialog dialog = builder.create();
     dialog.show();
    }
  }
}

我的问题是，当弹出通知并要求用户停止或继续时，即使再次将running设置为true，线程也不再运行。我知道线程不能在通知窗口上等待，但为什么当用户将running值设置为true时，代码是否会再次运行？

Answer 1

看看这些代码：

if (fsensor3 > 200) 
      {
          running = false; //To stop thread from repeating
          new MyVoltageAlert().execute(fsensor3);
          //What do I do here?
      }

也许你的问题的原因是，上面的逻辑再次将running设置为false。

我将如何恢复和暂停此线程？

1 个答案: