如何使按钮取消CountDownTimer-Android应用 [英] How to make a button cancel a CountDownTimer - Android app

问题描述

我有一个带有以下代码的倒数计时器，如何使按钮(i.d button2)停止(或取消)计时器.但也要这样做，如果时间用完了，可以将它们用于Scores.class.

I have a Count down timer with the following code, how can I make a button (i.d button2) stop (or cancel) the timer. but also make it so if the time runs out they are intent'ed to Scores.class.

计时器代码:

LevelOne context;
@Override protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Intent intent = getIntent();
    setContentView(R.layout.activity_level_one);

    context = this;

    new CountDownTimer(1500, 1500) {
        public void onTick(long millisUntilFinished) {

        }

        public void onFinish() {

            Intent intent = new Intent(context, Scores.class);
            startActivity(intent);
        }
    }.start();

}

推荐答案

不要只使用"new CountDownTimer"(不实例化CountDownTimer对象)，否则您基本上将无法再次引用它.

Don't just use "new CountDownTimer" (without instantiating a CountDownTimer object) or else you basically won't have a way to reference it again.

因此，改为创建一个实际的CountDownTimer对象，例如

So instead, make an actual CountDownTimer object, e.g.

CountDownTimer myCountDownTimerObject = new CountDownTimer(1500, 1500)
{
    public void onTick(long millisUntilFinished) {

    }

    public void onFinish() {

        Intent intent = new Intent(context, Scores.class);
        startActivity(intent);
    }
};

请注意，我没有包含".start()".那是因为您稍后会调用它在onCreate或您要启动"计时器的任何地方.

Notice there I did not include the ".start()". That is because you will call it later e.g. in onCreate, or wherever you want to "start" your timer.

因此，在onCreate(例如)中，写:

So, in onCreate (for example), write:

myCountDownTimerObject.start();

然后，在onClick中为您的按钮键入以下内容:

Then, inside your onClick for your button, type this:

myCountDownTimerObject.cancel();

我希望这会有所帮助！

编辑

EDIT

public class MyActivity extends Activity {


    Button myButton;

    CountDownTimer timer = new CountDownTimer(30000, 1000)
    {

        @Override
        public void onFinish() {
            Intent intent = new Intent("com.example.intentForYourActivity");
            startActivity(intent);
        }

        @Override
        public void onTick(long arg0) {
            //do something
        }

    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //ass soon as this activity is created, I start my timer.
        timer.start();

        myButton = (Button) findViewById(R.id.cancel);

        myButton.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View arg0) {
                timer.cancel();
            }});
    }
}

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