RecyclerView点击事件与长按事件,并添加点击效果

1.添加点击效果

为了让5.0以上的系统产生水波纹效果，所以我们新建一个drawable-v21目录来存放drawable文件

RecyclerView点击事件与长按事件,并添加点击效果

5.0以下drawable文件

recycler_bg.xml

[code]<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true" >
        <shape android:shape="rectangle">
            <solid android:color="#cfd8dc"></solid>
        </shape>
    </item>
</selector>

5.0以上 drawable-v21

recycler_rectangle.xml

recycler_bg.xml

[code]<!--点击出现的水波纹效果是矩形的 -->
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
    <solid android:color="#FFFFFF" />
</shape>

[code]<?xml version="1.0" encoding="utf-8"?>
<!-- ripple 是5.0才出现的新标签-->
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
    android:color="#cfd8dc" ><!-- 点击出现的水波纹的颜色 -->
    <item android:drawable="@drawable/recycler_rectangle"/>
</ripple>

在网上找了一下实现方法，有的说在adapter里添加回调接口来实现点击事件与长按事件。
不过经过测试，有时候会产生这样的现象：点击item跳转到下一个页面，再返回回来时，
item的点击事件会失效。后来在Stack Overflow找到了新的方法。
原文链接如下：RecyclerView onClick。这里贴上代码：

public class RecyclerItemClickListener implements RecyclerView.OnItemTouchListener {
public interface OnItemClickListener {
void onItemClick(View view, int position);

void onItemLongClick(View view, int position);
    }

private OnItemClickListener mListener;

private 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 childView = recyclerView.findChildViewUnder(e.getX(), e.getY());

if (childView != null && mListener != null) {
                    mListener.onItemLongClick(childView, recyclerView.getChildAdapterPosition(childView));
                }
            }
        });
    }

@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) {
    }
}

然后在activity中添加事件即可

recyclerView.addOnItemTouchListener(new RecyclerItemClickListener(getActivity(), recyclerView, new RecyclerItemClickListener.OnItemClickListener() {
    @Override
    public void onItemClick(View view, int position) {
        // ...
    }

    @Override
    public void onItemLongClick(View view, int position) {
        // ...
    }
}));</pre><br /><br />

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RecyclerView点击事件与长按事件,并添加点击效果

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