Error when calling intent in setOnItemClickListener RecyclerView

Question

Im trying to intent Upcoming.java to MeetingDetails.java. I already try toast inside OnItemClickListener and it works, but when i try to intent there is an error.

Upcoming.Java

mAdapter = new MeetingsAdapter(meetingList);
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext());
    recyclerView.setLayoutManager(mLayoutManager);
    recyclerView.addItemDecoration(new MeetingDivider(this, LinearLayoutManager.VERTICAL));
    recyclerView.setItemAnimator(new DefaultItemAnimator());
    recyclerView.setAdapter(mAdapter);

    MeetingListClickSupport.addTo(recyclerView).setOnItemClickListener(new MeetingListClickSupport.OnItemClickListener() {
        @Override
        public void onItemClicked(RecyclerView recyclerView, int position, View v) {
            Meeting meeting = meetingList.get(position);
            Intent i = new Intent(getApplicationContext() , MeetingDetails.class);
            i.putExtra("id", meeting.getId());
            i.putExtra("status", "U");
            startActivity(i);
        }
    });

MeetingListClickSupport.java

    @Override
    public void onClick(View v) {
        if (mOnItemClickListener != null) {
            RecyclerView.ViewHolder holder = mRecyclerView.getChildViewHolder(v);
            mOnItemClickListener.onItemClicked(mRecyclerView, holder.getAdapterPosition(), v);
        }
     }

MeetingsAdapter.java

private List<Meeting> meetingsList;

public class MyViewHolder extends RecyclerView.ViewHolder {
    public TextView mName, description;

    public MyViewHolder(View view) {
        super(view);
        mName = (TextView) view.findViewById(R.id.mName);
        description = (TextView) view.findViewById(R.id.description);
    }
}

public MeetingsAdapter(List<Meeting> meetingsList) {
    this.meetingsList = meetingsList;
}

@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View itemView = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.activity_meeting_list, parent, false);

    return new MyViewHolder(itemView);
}

@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
    Meeting meeting = meetingsList.get(position);
    holder.mName.setText(meeting.getName());
    holder.description.setText(meeting.getDescription());
}

@Override
public int getItemCount() {
    return meetingsList.size();
}

I got an error like this :

FATAL EXCEPTION: main
Process: com.example.erice.attendancecontroller, PID: 1358
java.lang.NullPointerException: Attempt to invoke virtual method 'android.app.ActivityThread$ApplicationThread android.app.ActivityThread.getApplicationThread()' on a null object reference
                  at com.example.erice.attendancecontroller.Upcoming$1.onItemClicked(Upcoming.java:65)
                  at com.example.erice.attendancecontroller.MeetingListClickSupport$1.onClick(MeetingListClickSupport.java:20)

Please if anyone can help me, thank you very much

It would be better if you start by telling us what you're trying to do so that we understand the context without reading every bit of code. Down voting because it's not clear, even though there's valid answers. — Justin Mitchell, Nov 24 '16 at 06:07
Possible duplicate of [What is a NullPointerException, and how do I fix it?](http://stackoverflow.com/questions/218384/what-is-a-nullpointerexception-and-how-do-i-fix-it) — sushildlh, Nov 24 '16 at 06:08
Hey pass the current Activity context not the Application context. — Sagar Gangawane, Nov 24 '16 at 06:09
im trying to pass Upcoming.this but still got the same error — Ricz Tan, Nov 24 '16 at 06:18
@Ironman when i use this, there will be a red line cannot resolve constructor MeetingListClickSupport.OnitemClickListener — Ricz Tan, Nov 24 '16 at 06:22
Check your parameters for call `mOnItemClickListener.onItemClicked`. I think one of them is `null` — , Nov 24 '16 at 06:23
@RiczTan I have update my answer with full explanation just check it out — Harshad Pansuriya, Nov 24 '16 at 06:24
Test by moving the code from the onClickListener to the onCreate function. Does it crash there? — lionscribe, Nov 24 '16 at 06:47

Harshad Pansuriya · Answer 1 · 2016-11-24T06:18:29.827

0

In your this line

RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext());

your passing getApplicationContext() you have to pass Activity context.

use this

RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(this);

then in RecycleView.Adapter class Create Constructor.

public MeetingsAdapter : RecyclerView.Adapter
{
    Activity context;

     public MeetingsAdapter(Activity context)
        {
            this.context = context;
        }
}

Now in your OnClick use this way

Intent i = new Intent(context , MeetingDetails.class);

edited Nov 24 '16 at 06:18

answered Nov 24 '16 at 06:07

Harshad Pansuriya

20,189
8
67
95

thank you for your response, but when i use context in OnClick where context refers to ? since i have MeetingsAdapter.Java and i already create a constructor public MeetingsAdapter(Activity context) and declare Activity context in MeetingsAdapter.java – Ricz Tan Nov 24 '16 at 06:30
I add my MeetingsAdapter.java in the post – Ricz Tan Nov 24 '16 at 06:35

Error when calling intent in setOnItemClickListener RecyclerView

1 Answers1