Question

我有一个应用程序，我需要从3到1显示计数器然后快速切换到另一个活动。 TimerTask会不适合这样做？有人能告诉我一个如何做到这一点的例子吗？

CountDownTimer工作。显示计时器3秒的代码是。

new CountDownTimer(4000, 1000) {

             public void onTick(long millisUntilFinished) {
                 Animation myFadeOutAnimation = AnimationUtils.loadAnimation(countdown.this, R.anim.fadeout);       
                 counter.startAnimation(myFadeOutAnimation);
                 counter.setText(Long.toString(millisUntilFinished / 1000));
             }

             public void onFinish() {
                 counter.setText("done!");
             }
        }.start();

Answer 1

我最好使用CountDownTimer。

如果您想要计数器计数3秒：

//new Counter that counts 3000 ms with a tick each 1000 ms
CountDownTimer myCountDown = new CountDownTimer(3000, 1000) {
    public void onTick(long millisUntilFinished) {
        //update the UI with the new count
    }

    public void onFinish() {
        //start the activity
   }
};
//start the countDown
myCountDown.start();

Answer 2

使用CountDownTimer，如下所示。

第1步：创建CountDownTimer类

class MyCount extends CountDownTimer {
        public MyCount(long millisInFuture, long countDownInterval) {
            super(millisInFuture, countDownInterval);
        }

        public void onFinish() {
            dialog.dismiss();
           // Use Intent to Navigate from this activity to another
        }

        @Override
        public void onTick(long millisUntilFinished) {
            // TODO Auto-generated method stub
        }
}

第二步：为该类创建一个对象

MyCount counter = new MyCount(2000, 1000); // set your seconds
counter.start();

在Android中实现计数器

2 个答案: