[안드로이드 스튜디오] RecyclerView 리스너

1. RecyclerView를 구성하는 cardView에 각각 리스너 달아주기

- Adapter에서 onBindViewHolder 메소드나 ViewHolder 클래스에서 리스너 등록

- 같은 원리로 cardView 내의 버튼에만 리스너를 다는 등 할 수 있음

http://kingpiggylab.tistory.com/130 참고

2. RecylclerView 자체에 리스너를 등록

- addOnClickListener(리스너)로 등록

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
 
public class RecyclerItemClickListener implements RecyclerView.OnItemTouchListener {
    private OnItemClickListener mListener;
 
    public interface OnItemClickListener {
        void onItemClick(View view, int position);
 
        void onLongItemClick(View view, int position);
    }
 
    GestureDetector mGestureDetector;
 
    public RecyclerItemClickListener(Context context, final RecyclerView recyclerView, OnItemClickListener listener) {
        mListener = listener;
        mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
            @Override
            public boolean onSingleTapUp(MotionEvent e) {
                return true;
            }
 
            @Override
            public void onLongPress(MotionEvent e) {
                View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
                if (child != null && mListener != null) {
                    mListener.onLongItemClick(child, recyclerView.getChildAdapterPosition(child));
                }
            }
        });
    }
 
    @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 true;
        }
        return false;
    }
 
    @Override
    public void onTouchEvent(RecyclerView view, MotionEvent motionEvent) {
    }
 
    @Override
    public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
    }
}

mRecyclerView.addOnItemTouchListener(
                new RecyclerItemClickListener(getApplicationContext(), mRecyclerView, new RecyclerItemClickListener.OnItemClickListener() {
                    @Override
                    public void onItemClick(View view, int position) {
                        Toast.makeText(getApplicationContext(),position+"번 째 아이템 클릭",Toast.LENGTH_SHORT).show();
                        switch (position){
                            case 0:
 
                                break;
                            case 1:
                                break;
                            case 2:
                                break;
                        }
                    }
 
                    @Override
                    public void onLongItemClick(View view, int position) {
                        Toast.makeText(getApplicationContext(),position+"번 째 아이템 롱 클릭",Toast.LENGTH_SHORT).show();
                    }
                }));