Question

如何通过活动开始立即开始倒计时，并在时间到来时开始新活动？提前致谢

编辑：活动包含一个按钮。用户应该按下它直到时间结束，否则另一个活动开始

Answer 1

试试这段代码

new CountDownTimer(30000, 1000) {

     public void onTick(long millisUntilFinished) {
         mTextField.setText("seconds remaining: " + millisUntilFinished / 1000);
     }

     public void onFinish() {
         mTextField.setText("done!");
        //start new activity
     }
  }.start();

Answer 2

这是您正在寻找 spalshActivity

的答案

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_splash_screen);
    try {
        TimerTask timerTask = new TimerTask() {

            @Override
            public void run() {
                Intent i = new Intent(SplashScreen.this,
                        MainActivity.class);
                startActivity(i);
                finish();

            }
        };
        Timer timer = new Timer();
        timer.schedule(timerTask, 300);// DElay of 300 mil sec
    } catch (Exception e) {

        Log.e("ERROR in Splash Screen", e.toString());
    }

}

Answer 3

您可以通过两种方式实现这一目标

方法1：创建线程并在重定向到主应用程序屏幕后准确设置睡眠时间。 方法2：设置处理程序的时间并调用Handler（）。postDelayed，在设置时间并重定向到主应用程序屏幕后，它将调用runnable的run方法。

我们可以用这种给定的方式实现我们可以为MainScreen编写代码

import android.os.Bundle;
import android.os.Handler;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;

public class MainScreen extends Activity {

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

// METHOD 1     

         /****** Create Thread that will sleep for 10 seconds *************/        
        Thread background = new Thread() {
            public void run() {

                try {
                    // Thread will sleep for 10 seconds
                    sleep(10*1000);

                    // After 10 seconds redirect to another intent
                    Intent i=new Intent(getBaseContext(),AnotherScreen .class);
                    startActivity(i);

                    //Remove activity
                    finish();

                } catch (Exception e) {

                }
            }
        };

        // start thread
        background.start();

//METHOD 2  

        /*
        new Handler().postDelayed(new Runnable() {

            // Using handler with postDelayed called runnable run method

            @Override
            public void run() {
                Intent i = new Intent(MainScreen.this, AnotherScreen.class);
                startActivity(i);

                // close this activity
                finish();
            }
        }, 10*1000); // wait for 10 seconds
        */
    }

    @Override
    protected void onDestroy() {

        super.onDestroy();

    }}

AnotherScreen代码可以如下

    import android.app.Activity;
import android.os.Bundle;

public class AnotherScreen extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.anotherScreen); 

    } 

    @Override
    protected void onDestroy() {

        super.onDestroy();

    }
}

另一个示例访问http://www.androidhive.info/2013/07/how-to-implement-android-splash-screen-2/

https://codereview.stackexchange.com/questions/31295/review-request-android-countdowntimer-activity

活动开始时CountDown Timer

3 个答案: