RecyclerView的点击事件，使用很简单

方法一：代码来自，Getting your clicks on RecyclerView
当ItemView attach RecyclerView时实现事件监听

import android.support.v7.widget.RecyclerView;
import android.view.View;

/**
* Created by r on AD2018-7-7.
*/

public class ItemClickSupport {
private final RecyclerView mRecyclerView;
private OnItemClickListener mOnItemClickListener;
private OnItemLongClickListener mOnItemLongClickListener;

/*实例化一个onClickListener对象*/
private View.OnClickListener mOnClickListener = new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        if (mOnItemClickListener != null) {
            RecyclerView.ViewHolder holder = mRecyclerView.getChildViewHolder(v);
            mOnItemClickListener.onItemClicked(mRecyclerView, holder.getAdapterPosition(), v);
        }
    }
};

/*实例化一个onLongClickListener对象*/
private View.OnLongClickListener mOnLongClickListener = new View.OnLongClickListener() {
    @Override
    public boolean onLongClick(View v) {
        if (mOnItemLongClickListener != null) {
            RecyclerView.ViewHolder holder = mRecyclerView.getChildViewHolder(v);
            return mOnItemLongClickListener.onItemLongClicked(mRecyclerView, holder.getAdapterPosition(), v);
        }
        return false;
    }
};

/*实例化一个attachListener对象*/
private RecyclerView.OnChildAttachStateChangeListener mAttachListener
        = new RecyclerView.OnChildAttachStateChangeListener() {
    @Override
    public void onChildViewAttachedToWindow(View view) {
        if (mOnItemClickListener != null) {
            view.setOnClickListener(mOnClickListener);
        }
        if (mOnItemLongClickListener != null) {
            view.setOnLongClickListener(mOnLongClickListener);
        }
    }

    @Override
    public void onChildViewDetachedFromWindow(View view) {}
};

/*设置recyclerView的tag值，添加recyclerView的childAttachStateChange事件监听*/
private ItemClickSupport(RecyclerView recyclerView) {
    mRecyclerView = recyclerView;
    mRecyclerView.setTag(R.id.text1, this);
    mRecyclerView.addOnChildAttachStateChangeListener(mAttachListener);
}

/*返回ItemClickSupport对象，传入RecycleView对象*/
public static ItemClickSupport addTo(RecyclerView view) {
    ItemClickSupport support = (ItemClickSupport) view.getTag(R.id.text1);
    if (support == null) {
        support = new ItemClickSupport(view);
    }
    return support;
}

/*移除support事件监听*/
public static ItemClickSupport removeFrom(RecyclerView view) {
    ItemClickSupport support = (ItemClickSupport) view.getTag(R.id.text1);
    if (support != null) {
        support.detach(view);
    }
    return support;
}

/*设置点击监听，返回当前Support对象*/
public ItemClickSupport setOnItemClickListener(OnItemClickListener listener) {
    mOnItemClickListener = listener;
    return this;
}

/*设置长按事件，并返回当前support对象*/
public ItemClickSupport setOnItemLongClickListener(OnItemLongClickListener listener) {
    mOnItemLongClickListener = listener;
    return this;
}

private void detach(RecyclerView view) {
    view.removeOnChildAttachStateChangeListener(mAttachListener);
    view.setTag(R.id.text1, null);
}

public interface OnItemClickListener {
    void onItemClicked(RecyclerView recyclerView, int position, View v);
}

public interface OnItemLongClickListener {
    boolean onItemLongClicked(RecyclerView recyclerView, int position, View v);
}

}

在Activity中使用：
ItemClickSupport itemClickSupport = ItemClickSupport.addTo(rv);
itemClickSupport.setOnItemClickListener(new ItemClickSupport.OnItemClickListener() {
@Override
public void onItemClicked(RecyclerView recyclerView, int position, View v) {
Toast.makeText(MainActivity.this, “you click me!” + position, Toast.LENGTH_SHORT).show();
}
});

方法二：使用RecyclerView 的 addOnItemTouchListener事件监听，
来自
实现原理：创建类继承自RecyclerView的SimpleOnItemTouchListener,
然后在构造方法中通过GestureDetectorCompat实现单点和长按的事件，
用借口回掉的方式提供给Activity调用，并且在方法中返回itemView和position

import android.support.v4.view.GestureDetectorCompat;
import android.support.v7.widget.RecyclerView;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;

/**
* Created by r on AD2018-7-7.
*/

public class ItemClickListener extends RecyclerView.SimpleOnItemTouchListener {

private OnItemClickListener clickListener;
private GestureDetectorCompat gestureDetector;

public interface OnItemClickListener {

    void onItemClick(View view, int position);

    void onItemLongClick(View view, int position);
}

public ItemClickListener(final RecyclerView recyclerView,OnItemClickListener listener) {
    this.clickListener = listener;
    gestureDetector = new GestureDetectorCompat(recyclerView.getContext(),new GestureDetector.SimpleOnGestureListener({
                @Override
                public boolean onSingleTapUp(MotionEvent e) {
                    View childView = recyclerView.findChildViewUnder(e.getX(), e.getY());
                    if (childView != null && clickListener != null) {
                        clickListener.onItemClick(childView, recyclerView.getChildAdapterPosition(childView));
                    }
                    return true;
                }

                @Override
                public void onLongPress(MotionEvent e) {
                    View childView = recyclerView.findChildViewUnder(e.getX(), e.getY());
                    if (childView != null && clickListener != null) {
                        clickListener.onItemLongClick(childView,
                                recyclerView.getChildAdapterPosition(childView));
                    }
                }
            });
}

@Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
    gestureDetector.onTouchEvent(e);
    return false;
}

}

使用：
rv.addOnItemTouchListener(new ItemClickListener(rv, new ItemClickListener.OnItemClickListener() {

                @Override
                public void onItemClick(View view, int position) {
                    view.setBackgroundColor(ContextCompat.getColor(MainActivity.this, R.color.colorAccent));
                    Log.i("touch click name:", "" + position);
                    Toast.makeText(MainActivity.this, "the success road:" + position, Toast.LENGTH_SHORT).show();
                }

                @Override
                public void onItemLongClick(View view, int position) {
                    Log.i("touch long click:", "" + position);
                    Toast.makeText(MainActivity.this, "touch long click:" + position, Toast.LENGTH_SHORT).show();
                }
            }));