Activity starts again when lock phone screen

Question

I having the next problem. I’m developing a game. When I lock the device from the physical button and unlock it, the game starts again. The activity starts again. When I unlock it I want to continue playing from the moment I lock it.

Answer 1

Then you need to save the state in onPause and load it again in onResume

Answer 2

you need to save and restore state of your activity using onSaveInstanceState and onRestoreInstanceState

save:

static final String STATE_SCORE = "playerScore";
static final String STATE_LEVEL = "playerLevel";
...

@Override
public void onSaveInstanceState(Bundle savedInstanceState) {
    // Save the user's current game state
    savedInstanceState.putInt(STATE_SCORE, mCurrentScore);
    savedInstanceState.putInt(STATE_LEVEL, mCurrentLevel);

    // Always call the superclass so it can save the view hierarchy state
    super.onSaveInstanceState(savedInstanceState);
}

restore:

public void onRestoreInstanceState(Bundle savedInstanceState) {
    // Always call the superclass so it can restore the view hierarchy
    super.onRestoreInstanceState(savedInstanceState);

    // Restore state members from saved instance
    mCurrentScore = savedInstanceState.getInt(STATE_SCORE);
    mCurrentLevel = savedInstanceState.getInt(STATE_LEVEL);
}