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  1. 我有 2 个按钮
  2. 当我单击返回按钮时,我将退出延迟 10 秒
  3. 如果按下 2 个按钮中的任何一个按钮,那么我想停止退出应用程序。
  4. 如果未检测到按下按钮,则继续退出。

公共类 MainActivity 扩展 Activity {

int count=0;
boolean pressed;
Button b1,b2;
TextView t1;
Thread t;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    b1= (Button) findViewById(R.id.button1);
    b2= (Button) findViewById(R.id.button2);
    t1 = (TextView) findViewById(R.id.textView2);

    b1.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {

            pressed=true;
            t1.setText("Button1 Pressed");
            System.out.println("Button1");


        }
    });
    b2.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {

            pressed=true;
            t1.setText("Button2 Pressed");
            System.out.println("Button2");


        }
    });
}
/* (non-Javadoc)
 * @see android.app.Activity#onBackPressed()
 */
@SuppressLint("ParserError")
@Override
public void onBackPressed() {
    System.out.println("Inside Back Button");
    pressed=false;
    t = new Thread(new ABC(), "My Thread");

    t.start();
    System.out.println("OutSide while Loop in BACKBUTTON");
    if(pressed==true){
        System.out.println("Button 1 or 2 Pressed");
        t.interrupt();
        System.out.println("Stopping Thread forcefully");

        count =0;
    }
    if(pressed==false){
        System.out.println("Button 1 or 2 NOT Pressed");
        t.stop();
        super.onBackPressed();
    }
}


public class ABC implements Runnable{



    @Override
    public void run() {
        System.out.println("Inside Thread");
        do{
            count++;
            System.out.println(count);

        }
        while((count <1000) && (pressed==false));
        System.out.println("OutSide while Loop");

    }

}

}

4

1 回答 1

2

在这里使用Handler是您最好的解决方案。按下后添加通过handler.postDelayed(yourRunnableThatCallsFinish, 10000)调用Activity.finish()的可运行对象。请务必在按钮的 onClick 事件中调用 handler.removeCallbacks(SameRunnableObjectThatSendToQueueViaPostDelayed)以防止执行该可运行文件。

于 2012-08-05T09:34:21.370 回答