Why does my Android app stops, when I move it to the background?

Question

I'm developing an Android application and I have the following code lines:

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK || keyCode == KeyEvent.KEYCODE_HOME) {
        moveTaskToBack(true);
        return true;
    }

    [... SOME MORE CODE ...]

}

When I test it on the emulator, it works perfectly and it closes the app and opens it at the some point as before. But when I load the APK on a real device, it always stops the application and starts it new, when I open it again. With the loading screen.

Where is the problem?

Answer 1

Have you tried saving the state of the activity ? the solution is here