Activity gets killed when orientation is changed

Question

I have two activities in my project- Splash and AActivity. Splash is the main activity and is working fine. But if i change the orientation while Splash activity is running, the UI of splash activity goes off but it opens the AActivity after 10 sec.

code for splash activity is -

public class Splash extends Activity{

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

        Thread timer = new Thread(){
            public void run() {
                try{
                    sleep(10000);   

                }catch(InterruptedException e){
                    e.printStackTrace();
                }finally{
                    Intent AActivityIntent = new Intent("com.example.ex.AACTIVITY");
                    startActivity(AActivityIntent);
                }
            }};

        timer.start();
    }

    @Override
    protected void onPause() {
        super.onPause();
        finish();                                   
    }

}

I want to retain the UI of splash activity for 10 seconds even if orientation is changed. After 10 sec splash activity should be finished. How to do it ???

Answer 1

I suggest you doing the following:

public class Splash extends Activity {
    private Thread timer;
    private volatile long timeLeft;
    private long timeStarted;
    private long timeStopped;

    private static final long TIME_TO_SHOW = 100000
    private static final String KEY_TIME_LEFT = "timeLeftToRun";

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

        if (savedInstanceState != null) {
            timeLeft = savedInstanceState.getLong(KEY_TIME_LEFT, 0);
        } else {
            timeleft = TIME_TO_SHOW;
        }

        timer = new Thread() {
            public void run() {
                try {
                    sleep(timeLeft);   
                    Intent AActivityIntent = new Intent("com.example.ex.LISTSCREEN");
                    startActivity(AActivityIntent);
                } catch(InterruptedException e) {}
            }
        }};
        timeStarted = SystemClock.elapsedRealtime();
        timer.start();
    }

    @Override
    protected void onPause() {
        super.onPause();
        timer.interrupt();
        timeStopped = SystemClock.elapsedRealtime();
        finish();                                   
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        timeLeft -= timeStopped - timeStarted;
        if (timeLeft > 0) outState.putLong(timeLeft);
    }
}

The main idea here is that you kill the thread if the activity is killed, but you take a note for how long it has run and how much time it has left. When the activity is restored, you do the same actions, except you have to wait for a smaller amount of time.

The code above is, of course, untested, but it should illustrate the idea.

Answer 2

Insert into your manifest these below block. It means orientation change situation controlled by your "activity". http://developer.android.com/guide/topics/manifest/activity-element.html#config

android:configChanges="orientation"

And more.

Override "onConfigurationChanged" method.

Try this. You can do everything you want.

Answer 3

使用Alarmmanager而不是使用Thread延迟启动活动，即使您退出该应用程序，也可以随时取消待处理的Alarm