Nrthugu

I know there are several related topics but I have tried them all and nothing happens. I have a "MainActivity" class that contains a fragment called "HomeFragment" which this fragment contains a viewPager with two fragments one of them called "ListFragment". By setting up an adapter named as "ListAdapter" an onClick method for each items works fine, the problem is when I set:

                intentRequestDetails.putExtra(KEY_POSITION, position);

                intentRequestDetails.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

                ((Activity) context).startActivityForResult(intentRequestDetails, 2);

to onItemClick in adapter,
I do not know how to get result in "ListFragment".
I pass "getActivity()" to adapter and ListFragment but non of them worked!
Please help me with this to get result in "ListFragment"

@Override

public void onActivityResult(int requestCode, int resultCode, Intent data) {

    if (requestCode == 2) {

        if (resultCode == Activity.RESULT_OK) {

            int position = data.getIntExtra("position", -1);

            userRequestsViewModel.getResult().remove(position);

            viewHolder.rView.getAdapter().notifyItemRemoved(position);

            viewHolder.rView.getAdapter().notifyItemRangeChanged(position, viewHolder.rView.getAdapter().getItemCount());



        } else if (resultCode == Activity.RESULT_CANCELED) {

            //Write your code if there's no result

        }

    }

What I need
is what to pass from fragment to adapter as context? where and how to override the onActivityResult and if there is anything else that i missed?

• The onActivityResult in ListFragment does not triggered since the startActivityForResult is being called from ListAdapter! How should I handle this?


• How to get adapter and ListFragment in MainActivity if its a chance to update the list?

In addition to override onActivityResult in fragment, you also need override it in activity class:

@Override

 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 

    Fragment fragment = getSupportFragmentManager().findFragmentById("yourFragment"); 

    fragment.onActivityResult(requestCode, resultCode, data); 

}

and in fragment:

  @Override

  protected void onActivityResult(int requestCode, int resultCode, Intent data) {

   //do something

  }

After spending hours of research I finally solve this problem as follow:
As I have two nested fragments as child and parent in a one activity and I design to take action on each item click on the recyclerView items and going to another activity to get the result back and refreshing the list I added this code in MainActivity:

@Override

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

    Fragment fragment = getSupportFragmentManager().getFragments().get(1);

    fragment.onActivityResult(requestCode, resultCode, data);

}

which select the targeted fragment (parentFragment) to pass data to, and then in that parentFragment I add this method:

@Override

public void onActivityResult(int requestCode, int resultCode, Intent data) {

    Fragment fragment = getChildFragmentManager().getFragments().get(1);

    fragment.onActivityResult(requestCode, resultCode, data);

}

to send onActivityResult to the child fragment. After all in the child fragment:

@Override

public void onActivityResult(int requestCode, int resultCode, Intent data) {

     if (requestCode == 2){

        if (resultCode == Activity.RESULT_OK) {

            int position = data.getIntExtra("position", -1);

            userRequestsViewModel.getResult().remove(position);

            viewHolder.rView.getAdapter().notifyItemRemoved(position);

            viewHolder.rView.getAdapter().notifyItemRangeChanged(position, viewHolder.rView.getAdapter().getItemCount());

        }

    }

}

to refresh the recyclerView adapter and notify it that an item has been removed! Another important point is that in adapter I just did this:

Intent intent = new Intent(view.getContext(), SecondActivity.class);



                intent.putExtra(KEY_POSITION, position);

                ((Activity) context).startActivityForResult(intent, 2);

and remove this line of code:

intentRequestDetails.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

and of course I passed the context of activity from fragment to adapter: simply

getContext()

I hope this works for you too if you deal with such a problem one day