How to save very simple state

OC-SavingStateActivity.java

private static final String STATE_COUNTER = "counter";

private int mCounter;

...

@Override
protected void onSaveInstanceState(Bundle outState) {
    // Make sure to call the super method so that the states of our views are saved
    super.onSaveInstanceState(outState);
    // Save our own state now
    outState.putInt(STATE_COUNTER, mCounter);
}