How to call getFragmentManager on Recycler.Adapter?

Question

I am converting ListView of my app to RecyclerView. On ListView, it was very easy to implement OnClickListener but in RecyclerView, we have to do it in adapter. I want to open a new Fragment when user clicks on a item. To do this I have to call FragmentManager in adapter which I am not able to do. This is my code of RecyclerAdapter:

public ListItemViewHolder(View itemView) {
            super(itemView);
            title = (TextView) itemView.findViewById(R.id.title);
            description = (TextView) itemView.findViewById(R.id.description);
            itemView.setOnClickListener(this);
        }

        @Override
        public void onClick(View v) {
            //Call FragmentManager and add Fragment to it.
            }
        }

So, how to call FragmentManager and add Fragments in it. Is there any better way than this like sendingBroadcast or any other method.

Answer 1

You just need an activity context passed in your constructor. Be sure to call new Adapter(this,...) from activities and new Adapter(getActivity(),...) from fragments.

private Context context;  @Override public void onClick(View v) {     FragmentManager manager = ((AppCompatActivity)context).getSupportFragmentManager(); } 

Answer 2

To add on to the approved answer: if you still get an error you might need to replace this line;

FragmentManager manager = ((Activity)context).getFragmentManager();

With this

FragmentManager manager = ((AppCompatActivity)context).getSupportFragmentManager();

For me this was because I was using the support.v4.app.FragmentManager instead of the regular fragmentmanager

Still get an error?

As one comment below pointed out, this might throw a java.lang.ClassCastException: and log ... cannot be cast to android.support.v7.app.AppCompatActivity (check comments for details)

Their fix was to use this instead (I haven't tested it but it worked for them):

((AppCompatActivity)activity).getSupportFragmentManager()

Answer 3

Make sure to pass context to the ArrayAdapter or RecyclerViewAdpater,So that we can get it inside Adapter Class.

If your mainActivity is extending Activity then use :

 FragmentManager fragmentManager = ((Activity)context).getFragmentManager();

If your mainActivity is extending AppCompatActivity then use :

FragmentManager fragmentManager = ((AppCompatActivity)context).getSupportFragmentManager();