how to pass data from one fragment to previous fragment?

Question

I am going FragmentA->FragmentB. Now From FragmentB I want to pass data to FragmentA.So How can I do that??

Currently am going FragmentB->FragmentA with getCus

Answer 1

Work for me.

In FragmentB create interface callback like this

private FragmentCallBacks fragmentCallBacks;

public interface FragmentCallBacks{
    void onCallBack(String data);
}

public void setFragmentCallBacks(FragmentCallBacks fragmentCallBacks) {
    this.fragmentCallBacks = fragmentCallBacks;
}

//onDestroy add this code
@Override
public void onDestroy() {
    super.onDestroy();
    fragmentCallBacks.onCallBack("This data from FragmentB");
}

And add this code in FragmentA

FragmentB fragment = new FragmentB();
replaceFragment(fragment, "TAG");
fragment.setFragmentCallBacks(data -> {
    //do something here with your data
});

public void replaceFragment(Fragment fragment, String tag) {
    FragmentManager fragmentManager = getSupportFragmentManager();
    FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
    fragmentTransaction.replace(R.id.frameLayout, fragment);
    fragmentTransaction.addToBackStack(tag);
    fragmentTransaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
    fragmentTransaction.commit();
}

I hope this help you.