java - Android 倒计时器，新 Activity 继续计时器

Question

我创建了一个可以运行的倒计时器，但它会在每次 Activity 时重新开始。我正在尝试保存倒计时值并在第二个 Activity 中使用它。以下是我的主要 Activity 页面上的倒计时代码。

    //Countdown Start


    new CountDownTimer(10000, 1000) {


        public void onTick(long millisUntilFinished) {
        final int j = (int) millisUntilFinished / 1000;

        long timed;
        timed = millisUntilFinished;




            TextView textic = (TextView) findViewById(R.id.textView2);
            textic.setText("" + (millisUntilFinished));



            runOnUiThread(new Runnable() {
              @Override
                public void run() {
                TextView textic = (TextView) findViewById(R.id.textView2);
                textic.setText(Integer.toString((j)));;


                }
            });





            }


            public void onFinish() {        
            }
        }.start();

//Countdown Finish

我尝试存储倒计时值，然后在我的 Intent 中使用 passextra 来传递“定时”，但这不起作用。我四处搜寻，找不到任何有效的解决方案。任何帮助将不胜感激。

谢谢

================

编辑

================

公共(public)类MainActivity扩展了startscreen{

private CountDownTimer timer3;
public void onCreate(){

    timer3 = new CountDownTimer(10000,100){

        public void onTick(long millisUntilFinished) {

            TextView displaytime = (TextView) findViewById(R.id.textView3);
            displaytime.setText("" + (millisUntilFinished));}

         public void onFinish() {
         }

      }.start();




        };;

public void startTimer(){

}

public void cancelTimer(){

}

==============

编辑2

            //Counter 1 
            Counter1 = new CountDownTimer(10000 , 1000) { 
                public void onTick(long millisUntilFinished) { 
                    mCounter1TextField.setText("Seconds left: " + formatTime(millisUntilFinished));


                } 


                public void onFinish() { 



                    mCounter1TextField.setText("Finished!"); 
                    // Counter1.start();
                } 
            }; 



              Counter1.start();


                    public void starttimer() {
       Counter1.start();


}

然后在我的第二个 Activity 中我得到了:

    MainActivity Counter1 = (MainActivity) getApplicationContext();
    Counter1.starttimer();

    TextView mCounter1TextField=(TextView)findViewById(R.id.textView4);
    mCounter1TextField.setText("Seconds left: " + (Counter1));

Answer 1

扩展Application类并在那里添加您的全局计时器。你的类看起来像这样

 public class MyApplication extends Application{
    private CountDownTimer timer;
    public void onCreate(){
        super.onCreate();
        timer = new CountDownTimer(10000,100){
                .....
            };
    }
    public void startTimer(){
        ...
    }

    public void cancelTimer(){
        ...
    }
}

通过从 Activity 中调用 getApplicationContext() 来启动此计时器

MyApplication application = (MyApplication) getApplicationContext();
application.startTimer();

此外，请确保在 Android list 中重命名您的应用程序。

<application ... android:name=".MyApplication" .../>