RecyclerView: how to catch the onClick on an ImageView?

问题

I have an ImageView in CardViews of my RecyclerView. I would like to catch the onClick on the ImageView, like I already did with the ListView. So, in the public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) I tried with:

 myViewHolder.imageView.setClickable(true);
 myViewHolder.imageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
               Log.d("TEST", "Clicked");
            }

but this was totally ignored. The following code is working:

 myViewHolder.imageView.setImageResource(R.drawable.star_yellow);

What can I do?

回答1:

Here's what I do in my project.

1. Have an interface class somewhere in your project:

   public interface RecyclerViewClickListener {
   
       void onRowClicked(int position);
       void onViewClicked(View v, int position);
   }
   

2. In your RecyclerView.Adapter class, add this interface as a field and pass it to adapter via constructor:

   public class YourRecAdapter extends RecyclerView.Adapter<YourRecAdapter.SimpleViewHolder>{
   
       private RecyclerViewClickListener listener;
   
       public YourRecAdapter(RecyclerViewClickListener listener){
           this.listener = listener;
       }
   
       public static class SimpleViewHolder extends RecyclerView.ViewHolder {
   
           public SimpleViewHolder(View itemView, final RecyclerViewClickListener listener) {
               super(itemView);
   
               // find view ids here
   
               itemView.setOnClickListener(new View.OnClickListener() {
                   @Override
                   public void onClick(View v) {
                       if(listener != null)
                           listener.onRowClicked(getAdapterPosition());
                   }
               });
   
               someViewholderView.setOnClickListener(new View.OnClickListener() {
                   @Override
                   public void onClick(View v) {
                       if(listener != null)
                           listener.onViewClicked(v, getAdapterPosition());
                   }
               });
           }
       }
   }
   

3. Implement the interface in your Activity / Fragment:

   public class YourFragment extends Fragment implements RecyclerViewClickListener {
   
      @Override
      public void onViewClicked(View v, int position) {
          if(v.getId == R.id.yourDesiredView){
              // Do your stuff here
          }
      }
   
      @Override
      public void onRowClicked(int position) {
          // Clicked entire row
      }
   }
   

回答2:

Inside your Viewholder class you can set the OnClickListener but you will need another interface in order to pass your OnClick register back to your adapter (or wherever your intended target is).

来源：https://stackoverflow.com/questions/33264042/recyclerview-how-to-catch-the-onclick-on-an-imageview