Sample of Java code - OnSaveInstanceState/OnCreate/OnRestoreInstanceState

OnSave; OnCreate; OnRestore

    //Saves data before changing activity
    @Override
    public void onSaveInstanceState(Bundle savedInstanceState) {
        savedInstanceState.putString(PLAYER_1_NAME, playerAName);
        savedInstanceState.putString(PLAYER_2_NAME, playerBName);
        savedInstanceState.putInt(SCORE_A, scorePlayerA);
        savedInstanceState.putInt(SCORE_B, scorePlayerB);
        super.onSaveInstanceState(savedInstanceState);
    }

    @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            // Check whether we're recreating a previously destroyed instance
            if (savedInstanceState != null) {
                // Restore value of members from saved state
                playerAName = savedInstanceState.getString(PLAYER_1_NAME);
                playerBName = savedInstanceState.getString(PLAYER_2_NAME);
                scorePlayerA = savedInstanceState.getInt(SCORE_A);
                scorePlayerB = savedInstanceState.getInt(SCORE_B);
            }
        }

        //Shows scores of player A and B after changing phone position - portrait to landscape and vice versus
        @Override
        protected void onRestoreInstanceState(Bundle savedInstanceState) {
            super.onRestoreInstanceState(savedInstanceState);
            playerAName = savedInstanceState.getString(PLAYER_1_NAME);
            scorePlayerA = savedInstanceState.getInt(SCORE_A);
            displayForPlayerA(scorePlayerA);
            displayForPlayerB(scorePlayerB);