How to add OnClickListner to CardView?

Question

I work with RecyclerViewand CardView. I want to snap OnClickListnerto each card. I tried many answers on stackoverflow, but they do not work for me. So far I tried -

public class SubjectAdapter extends RecyclerView.Adapter<SubjectAdapter.ViewHolder> implements View.OnClickListener,
    View.OnLongClickListener{

private static final String LOGCAT = "SubjectAdapter";
private final Context mContext;

List<Subject> SubjectsList;

public SubjectAdapter(Context context) {
    super();
    this.mContext = context;
    SQLiteDatabase.loadLibs(mContext);
    DBHelper myDbHelper = new DBHelper(mContext);
    SubjectsList = new ArrayList<Subject>();
    SubjectsList = myDbHelper.getAllSubjects();
    myDbHelper.close();
}

@Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
    View v = LayoutInflater.from(viewGroup.getContext())
            .inflate(R.layout.subject_cardview_row, viewGroup, false);
    ViewHolder viewHolder = new ViewHolder(v);

    // Below two lines are NOT working
    viewHolder.tvSubjectName.setOnClickListener(this);
    //viewHolder.setOnClickListener(this);

    return viewHolder;
}

@Override
public void onBindViewHolder(ViewHolder viewHolder, int i) {
    Subject subject = SubjectsList.get(i);
    viewHolder.tvSubjectName.setText(subject.getSubject_Name());
    viewHolder.tvCounts.setText(String.valueOf(subject.getSubject_Number_of_Questions()));

    // Below two lines are NOT working
    viewHolder.tvSubjectName.setOnClickListener(this);
    //viewHolder.setOnClickListener(this);
}

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

@Override
public void onClick(View v) {
    // It not working either
    ViewHolder holder = (ViewHolder) v.getTag();
    int position = holder.getPosition();

    if (v.getId() == holder.tvSubjectName.getId()){
        Log.d(LOGCAT, "tvSubjectName onClick at" + position);
        //Toast.makeText(mContext, "tvSubjectName onClick at" + position, Toast.LENGTH_LONG).show();
    } else {
        Log.d(LOGCAT, "RecyclerView Item onClick at " + position);
        //Toast.makeText(mContext, "RecyclerView Item onClick at " + position, Toast.LENGTH_LONG).show();
    }
}

@Override
public boolean onLongClick(View v) {
    return false;
}

class ViewHolder extends RecyclerView.ViewHolder {

    public TextView tvSubjectName;
    public TextView tvCounts;

    public ViewHolder(View itemView) {
        super(itemView);
        tvSubjectName = (TextView) itemView.findViewById(R.id.tv_subject_name);
        tvCounts = (TextView) itemView.findViewById(R.id.tv_text_counts);
    }
}
}

As you can see, I tried setOnClickListenerwith onCreateViewHolderand onBindViewHolder, as well as a separate one onClick, but none of them seem to work for me. So I want to know How to add OnClickListner to CardView?

Answer 1

The view returned by onClick does not necessarily correspond to the row hierarchy view in the recycler view. I think you should change onBindViewHolderwith

@Override
public void onBindViewHolder(final ViewHolder viewHolder, final int i) {
   final Subject subject = SubjectsList.get(i); 
   viewHolder.tvSubjectName.setOnClickListener(new View.OnClickListener(){


    @Override
    public void onClick(View v) {
        Log.d(LOGCAT, "tvSubjectName onClick at" + i);
       // etc
    }

   });
...
}

, View.OnClickListener View.OnLongClickListener onClick onLongClick.

Answer 2

! setOnClickListener ViewHolder.

class ViewHolder extends RecyclerView.ViewHolder
{
    public TextView tvSubjectName;
    public TextView tvCounts;

    public ViewHolder(View itemView) 
    {
        super(itemView);
        tvSubjectName = (TextView) itemView.findViewById(R.id.tv_subject_name);
        tvCounts = (TextView) itemView.findViewById(R.id.tv_text_counts);

        itemView.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                 //write here the code for wathever you want to do with a card
                 //...
            }
        });

}

}

Answer 3

API TwoWayView Lucas Rocha.

TwoWayLayoutManager - API LayoutManager, , , , RecyclerView.

, API , RecyclerView CardView.

http://lucasr.org/2014/07/31/the-new-twowayview/

Answer 4

OnClickListener itemView RecyclerView.ViewHolder, cardView getAdapterPosition(), putExtra . doc getAdapterPosition

`

class ViewHolder extends RecyclerView.ViewHolder
{
    public TextView tvSubjectName;
    public TextView tvCounts;

    public ViewHolder(View itemView) 
    {
        super(itemView);
        tvSubjectName = (TextView) itemView.findViewById(R.id.tv_subject_name);
        tvCounts = (TextView) itemView.findViewById(R.id.tv_text_counts);

        itemView.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                 int position = getAdapterPosition();
                 // use position to put extra data
            }
        });
}

`

Answer 5

onclick listener,

• View ViewHolderClass itemView,

2.setOnClickListener , ( ViewHolder) onBindViewHolder

cardView