Get clicked item and its position in RecyclerView
I am replacing my ListView
with RecyclerView
, list showing ok, but I would like to know how to get clicked item and its position, similar to the method OnItemClickListener.onItemClick(AdapterView parent, View v, int position, long id)
we use in ListView
.
Thanks for ideas!
Based on the link: Why doesn't RecyclerView have onItemClickListener()? and How RecyclerView is different from Listview?, and also @Duncan's general idea, I give my solution here:
-
Define one interface
RecyclerViewClickListener
for a passing message from the adapter toActivity
/Fragment
:public interface RecyclerViewClickListener { public void recyclerViewListClicked(View v, int position); }
-
In
Activity
/Fragment
implement the interface, and also pass listener to adapter:@Override public void recyclerViewListClicked(View v, int position){... ...} //set up adapter and pass clicked listener this myAdapter = new MyRecyclerViewAdapter(context, this);
-
In
Adapter
andViewHolder
:public class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.ItemViewHolder> { ... ... private Context context; private static RecyclerViewClickListener itemListener; public MyRecyclerViewAdapter(Context context, RecyclerViewClickListener itemListener) { this.context = context; this.itemListener = itemListener; ... ... } //ViewHolder class implement OnClickListener, //set clicklistener to itemView and, //send message back to Activity/Fragment public static class ItemViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{ ... ... public ItemViewHolder(View convertView) { super(convertView); ... ... convertView.setOnClickListener(this); } @Override public void onClick(View v) { itemListener.recyclerViewListClicked(v, this.getPosition()); } } }
After testing, it works fine.
[UPDATE]
Since API 22, RecyclerView.ViewHolder.getPosition()
is deprecated, so instead with getLayoutPosition()
.
public class MyRvAdapter extends RecyclerView.Adapter<MyRvAdapter.MyViewHolder>{
public Context context;
public ArrayList<RvDataItem> dataItems;
...
constructor
overrides
...
class MyViewHolder extends RecyclerView.ViewHolder{
public TextView textView;
public Context context;
public MyViewHolder(View itemView, Context context) {
super(itemView);
this.context = context;
this.textView = (TextView)itemView.findViewById(R.id.textView);
// on item click
itemView.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
// get position
int pos = getAdapterPosition();
// check if item still exists
if(pos != RecyclerView.NO_POSITION){
RvDataItem clickedDataItem = dataItems.get(pos);
Toast.makeText(v.getContext(), "You clicked " + clickedDataItem.getName(), Toast.LENGTH_SHORT).show();
}
}
});
}
}
}
Here is an Example to set a Click Listener.
Adapter extends RecyclerView.Adapter<MessageAdapter.MessageViewHolder> { ... }
public static class MessageViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public TextView tv_msg;
public TextView tv_date;
public TextView tv_sendTime;
public ImageView sharedFile;
public ProgressBar sendingProgressBar;
public MessageViewHolder(View v) {
super(v);
tv_msg = (TextView) v.findViewById(R.id.tv_msg);
tv_date = (TextView) v.findViewById(R.id.tv_date);
tv_sendTime = (TextView) v.findViewById(R.id.tv_sendTime);
sendingProgressBar = (ProgressBar) v.findViewById(R.id.sendingProgressBar);
sharedFile = (ImageView) v.findViewById(R.id.sharedFile);
sharedFile.setOnClickListener(this);
}
@Override
public void onClick(View view) {
int position = getAdapterPosition();
switch (view.getId()){
case R.id.sharedFile:
Log.w("", "Selected"+position);
break;
}
}
}
Put this code where you define recycler view in activity.
rv_list.addOnItemTouchListener(
new RecyclerItemClickListener(activity, new RecyclerItemClickListener.OnItemClickListener() {
@Override
public void onItemClick(View v, int position) {
Toast.makeText(activity, "" + position, Toast.LENGTH_SHORT).show();
}
})
);
Then make separate class and put this code:
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
public class RecyclerItemClickListener implements RecyclerView.OnItemTouchListener {
private OnItemClickListener mListener;
public interface OnItemClickListener {
public void onItemClick(View view, int position);
}
GestureDetector mGestureDetector;
public RecyclerItemClickListener(Context context, OnItemClickListener listener) {
mListener = listener;
mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onSingleTapUp(MotionEvent e) {
return true;
}
});
}
@Override
public boolean onInterceptTouchEvent(RecyclerView view, MotionEvent e) {
View childView = view.findChildViewUnder(e.getX(), e.getY());
if (childView != null && mListener != null && mGestureDetector.onTouchEvent(e)) {
mListener.onItemClick(childView, view.getChildAdapterPosition(childView));
}
return false;
}
@Override
public void onTouchEvent(RecyclerView view, MotionEvent motionEvent) {
}
@Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
}