**RecyclerView**是谷歌V7包下新增的控件,用来替代ListView的使用,在RecyclerView标准化了ViewHolder类似于ListView中convertView用来做视图缓.
可以通过设置LayoutManager来快速实现listview、gridview、瀑布流的效果，而且还可以设置横向和纵向显示，添加动画效果也非常简单(自带了ItemAnimation，可以设置加载和移除时的动画，方便做出各种动态浏览的效果),也是官方推荐使用的.以下是官方的说明:
> RecyclerView is a more advanced and flexible version of ListView. This widget is a container for large sets of views that can be recycled and scrolled very efficiently. Use the RecyclerView widget when you have lists with elements that change dynamically. 简单说就是当你需要动态展示一组数据的时候就会需要用到它。
>
使用步骤：
1、引入类库
~~~
implementation 'com.android.support:appcompat-v7:26.1.0'
~~~
2、布局文件
~~~
<android.support.v7.widget.RecyclerView
android:id="@+id/rv_projects"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/darker_gray" />
~~~
3、Activity实现
~~~
recyclerView = view.findViewById(R.id.recyclerView);
recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
adapter = new ProjectAdapter(R.layout.list_item_project, projectList);
recyclerView.addOnItemTouchListener(new OnItemClickListener() {
@Override
public void onSimpleItemClick(BaseQuickAdapter adapter, View view, int position) {
}
});
recyclerView.setAdapter(adapter);
~~~
