[SOLVED] Passing data between two fragments using a callback

Passing data between two fragments using a callback

I'm trying to pass data from one fragment to another using a callback but im having trouble doing it. In my activity I call a fragment A, that calls fragment B. In fragment B i select a item and I need to pass that item to fragment A. Can someone tell me how can I do that?

I know that with a callback I can get the data from fragment B to the activity, but how can I send that data to fragment A with keeping the state of that fragment?

Solution

Your activity should implement the callback, the callback can then find fragment B and post data to one of its public methods. If you make the public method in fragment B accept whatever data you need, you should be able to pass it straight through.

Something like this:

@Override
public void onCallback(String data) {
    FragmentB frag = (FragmentB) getSupportFragmentManager().findFragmentByTag(FragmentB.class.getSimpleName());
    if (frag != null) {
        frag.myMethod(data);
    }
}