Android app restarts when opened by clicking app icon

Question

Scenario :

I open my app by clicking icon, do something, navigate through activities, pause the app by clicking home button.

Case 1:

If I

Answer 1

In current activity set some image which needs to be displayed for 2 seconds like below.

ImageView im = new ImageView(this);
im.setImageResource(set your image);
setContentView(im);
intentMainScreen = new Intent(getApplicationContext(), MainScreen.class);
Handler x = new Handler();
x.postDelayed(new splashhandler(), 2000);

Then start your activity in the SplashHandler class (which implements runnable and call start activity in run method).

It will display your Splash screen for 2 seconds and start another activity.