Android HashMap in Bundle?

Question

The android.os.Message uses a Bundle to send with it\'s sendMessage-method. Therefore, is it possible to put a HashMap inside a

Answer 1

Please note: If you are using a AppCompatActivity, you will have to call the protected void onSaveInstanceState(Bundle outState) {} (NOT public void onSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) {}) method.

Example code...

Store the map:

@Override
protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.putSerializable("leftMaxima", leftMaxima);
    outState.putSerializable("rightMaxima", rightMaxima);
}

And receive it in onCreate:

if (savedInstanceState != null) {
    leftMaxima = (HashMap) savedInstanceState.getSerializable("leftMaxima");
    rightMaxima = (HashMap) savedInstanceState.getSerializable("rightMaxima");
}

Sorry if it's some kind of a duplicate answer - maybe someone will find it useful. :)