start Fragment from RecycleView Adapter Onclick

问题

Hi I have A RecycleView Adapter and A button. I want that button to start a Fragment. I can start an activity but not a fragment. I have tried this Onclick method for my Button

@Override
        public void onClick(View v) {
            Bundle bundle = new Bundle();
            bundle.putParcelable("event", events.get(getLayoutPosition()));
            Fragment fragment = new EditEventDetailFragment();
            fragment.setArguments(bundle);
            fragment.getFragmentManager().beginTransaction().replace(R.id.contentMainDrawer,fragment).commit();
        }

But have error invoke null object (contentMainDrawer) is my Main activity content_layout.

Any help is much appreciate. The Fragment host recycle view is call from Mainactivity

回答1:

Use below code for replace fragment

 Fragment fragment = new EditEventDetailFragment();
 FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
 FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
 fragmentTransaction.replace(R.id.contentMainDrawer, fragment, "tag").commit();

if you are using this code inside adapter than replace getActivity() to ((Activity) context).

回答2:

Hi I have found 2 answer that help whoever needed. The answer is to use the Activity that host the calling fragment. Many thanks @Mohit Suthar

Bundle bundle = new Bundle();
            bundle.putParcelable("event", events.get(getLayoutPosition()));
            Fragment fragment = new EditEventDetailFragment();
            fragment.setArguments(bundle);

            FragmentManager fragmentManager = ((MainActivity) context).getSupportFragmentManager();
            FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
            fragmentTransaction.replace(R.id.contentMainDrawer, fragment, "tag").commit();

来源：https://stackoverflow.com/questions/34527115/start-fragment-from-recycleview-adapter-onclick