Restoring very simple state

OC-RestoringStateActivity.java

private static final String STATE_COUNTER = "counter";

private TextView mCounterTextView;
private int mCounter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    
    ...
    
    // If we have a saved state then we can restore it now
    if (savedInstanceState != null) {
        mCounter = savedInstanceState.getInt(STATE_COUNTER, 0);
    }
    
    // Display the value of the counter
    mCounterTextView = (TextView) findViewById(R.id.counter_text);
    mCounterTextView.setText(Integer.toString(mCounter));
    
    ...
}

@Override
protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.putInt(STATE_COUNTER, mCounter);
}