Android - call fragment from a recycler view inside another fragment-CodePudding

I have an application (Java) which originally had 5 sections. All of these are fragments and they are accessed by 5 icons in the bottom navigation. However, one of the sections (Lessons) is now being replaced by a different fragment which contains a recycler view. Under this new design, one of the items in the recycler view will call the Lessons fragment.

The question is, how can I call the Lessons fragment from within the Recycler View contained in the new fragment?

Usually inside a recycler view I'd use code like the following:

    @Override
    public void onClick(View v) {

        int index = getAdapterPosition();
        LessonItem item = lessonList.get(index);

        Intent intent = new Intent(context, SomeActivity.class);

        Bundle bundle = new Bundle();
        bundle.putSerializable("lesson", item);
        intent.putExtras(bundle);

        ((Activity) context).startActivityForResult(intent, 1);

    }

but in this case I'm not dealing with an activity. Is there a way I can accomplish this without having to convert the fragment to an activity?

CodePudding user response：

As ismailfarisi mentioned before, if you use Navigation Component, it makes the transition easier.

However, if you want to still manage fragment replacements manually, you can interfaces as callback.

interface LessonItemListener {
     void onItemClick(LessonItem item);
}

in your recycler view adapter

class YourAdapter {

   public YourAdapter(LessonItemListener listener) {
       this.listener = listener;
   }

   private LessonItemListener listener;

   ...

   @Override
   public void onClick(View v) {
        int index = getAdapterPosition();
        LessonItem item = lessonList.get(index);
        listener.onItemClick();
   }

}

in your fragment has recyclerview

class YourFragment {

     private LessonItemListener listener;

     
     public void setListener(LessonItemListener listener) {
          this.listener = listener;
     }

     private void setupRecyclerView() {
          YourAdapter adapter = new YourAdapter(listener);
          recyclerView.setAdapter(adapter);
     }

}

in your Activity contains those fragments

class YourActivity extends AppCompatActivity implements LessonItemListener {


    private void setupFragments() {
          YourFragment fragment = new YourFragment();
          fragment.setListener(this);
    }

    ...

    @Override
    public void onItemClick(LessonItem item) {
         //you are in activity now
         //make whatever you want here
         //such as fragment replacement in your bottom nav
    }

}

CodePudding user response：

navigation component from jetpack is better for handling fragment transition

you can check this documentation https://developer.android.com/guide/navigation