RecyclerView的简单使用方法(一)

1、在build中引入compile ‘com.android.support:recyclerview-v7:25.3.1‘

2、在activity中布局如下：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.example.myapplication.MainActivity">   <android.support.v7.widget.RecyclerView       android:id="@+id/recycylview"       android:layout_width="match_parent"       android:layout_height="wrap_content">   </android.support.v7.widget.RecyclerView></RelativeLayout> 

item.xml布局：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:background="@color/colorPrimary"    android:gravity="center"    android:padding="20dp"    android:layout_height="match_parent"><TextView    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:id="@+id/text"    android:layout_gravity="center"    android:gravity="center"    android:text="Hello"    android:textSize="20dp"    android:padding="20dp"    android:textColor="#fff"/></LinearLayout>

3.在MainActivity中代码如下:

private RecyclerView mRecyclerView;private List<String> datas = new ArrayList();private  MyAdapter mAdapter;

@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);

mRecyclerView = (RecyclerView) findViewById(R.id.recycylview);    mAdapter = new MyAdapter(datas);    mRecyclerView.setAdapter(mAdapter);    mRecyclerView.setLayoutManager(new StaggeredGridLayoutManager(4,StaggeredGridLayoutManager.HORIZONTAL));//可以设置列表模式    mRecyclerView.addItemDecoration(new MyItemDacoration(this));//加载列表样式    initDatas();

}private void initDatas(){    datas.add("New York");    datas.add("Boston");    datas.add("New York");    datas.add("New York");    datas.add("New York");    datas.add("New York");    datas.add("New York");    datas.add("New York");    datas.add("New York");    datas.add("New York");    datas.add("New York");

}
4.适配器代码:

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {    private List<String> mDatas ;   private MyAdapter mAdapter;   private LayoutInflater inflater;    public MyAdapter(List<String> datas){        mDatas =datas;

}    @Override    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        inflater = LayoutInflater.from(parent.getContext());        View view  = inflater.inflate(R.layout.item,parent,false);        return new ViewHolder(view);    }

@Override    public void onBindViewHolder(ViewHolder holder, int position) {//绑定数据        holder.textView.setText(mDatas.get(position));

}

@Override    public int getItemCount() {        return mDatas.size();    }

class ViewHolder extends RecyclerView.ViewHolder{        private TextView textView;

public ViewHolder(View itemView) {            super(itemView);            textView = (TextView) itemView.findViewById(R.id.text);        }    }}
5、新建dimen.xml文件
<dimen name="divider">10dp</dimen>  />

6.新建Java文件设置列表样式：

public class MyItemDacoration extends RecyclerView.ItemDecoration {    private int divider;

public MyItemDacoration(Context context) {        //即你要设置的分割线的宽度 --这里设为10dp        divider = context.getResources().getDimensionPixelSize(R.dimen.divider);    }

@Override    public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {        super.getItemOffsets(outRect, view, parent, state);//        outRect.left = divider;  //相当于 设置 left padding//        outRect.top = divider;   //相当于 设置 top padding//        outRect.right = divider; //相当于 设置 right padding        outRect.bottom = divider;  //相当于 设置 bottom padding    }