Android: Passing data from child fragment to parent fragment

I need to pass some data from the child fragment to the parent fragment that I will be able to read when I go back to the parent fragment. In detail:

I have a FragmentActivity that calls FragmentParent. From FragmentParent I call FragmentChild like this:

FragmentChild fragmentChild = new FragmentChild();
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.replace(, fragmentChild);

In FragmentChild I set a string value which I need to pass back to FragmentParent and then I return back to FragmentParent.

String result = "OK";

What is the best/proper way to read the result string in FragmentParent?

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You can use setTargetFragment and onActivityResult to achieve this.

Set FragmentParent instance as target fragment on FragmentChild instance i.e.

FragmentChild fragmentChild = new FragmentChild();
fragmentChild.setTargetFragment(this, FRAGMENT_CODE);
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.replace(, fragmentChild);

In FragmentChild, wherever you are invoking the popBackStack, call onActivityResult on the set target Fragment. Use Bundle to pass on additional data.

Intent intent = new Intent();
intent.putExtra(FRAGMENT_KEY, "Ok");
getTargetFragment().onActivityResult(getTargetRequestCode(), Activity.RESULT_OK, intent);

Back in FragmentParent, override the default onActivityResult method.

public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if(requestCode == FRAGMENT_CODE && resultCode == Activity.RESULT_OK) {
        if(data != null) {
           String value = intent.getStringExtra(FRAGMENT_KEY);
           if(value != null) {
              Log.v(TAG, "Data passed from Child fragment = " + value);