invoker | 技不如人，甘拜下风
2015-02-24 | learn

Android RecyclerView 尝试

说来惭愧,最近才发现这个组件,直接看代码吧.

  • 先上布局,很简单
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<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</FrameLayout>

  • XxxActivity.java

    注意: 使用 RecyclerView 必须设置 LayoutManager 用来管理子视图的布局

    就是下面 RecyclerView.Adapter 中的ListItemViewHolder

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//...
    private RecyclerView recyclerView = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_auto_hide_tool_bar);

        RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
        //使用 RecyclerView 必须设置 LayoutManager 用来管理 Child View 的布局
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
        linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
        linearLayoutManager.scrollToPosition(0);
        //显示用的数据
        List<DataModel> list = new ArrayList<DataModel>();
        for (int i = 0; i < 20; i++) {
            list.add(new DataModel("name"+i, "address"+i) );
        }

        recyclerView.setLayoutManager(linearLayoutManager);
        recyclerView.setAdapter(new MyRecycleeAdapter(list));
    }

//..
  • 实现 RecyclerView.Adapter 文件
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//必须要实现以下 3个方法

public ListItemViewHolder onCreateViewHolder(ViewGroup viewGroup, int i);
public void onBindViewHolder(ListItemViewHolder listItemViewHolder, int i);
public int getItemCount();

//**************分割线**************
//以下是最基本的 RecyclerView.Adapter 实现

public class MyRecycleeAdapter
extends RecyclerView.Adapter<MyRecycleeAdapter.ListItemViewHolder> {
    private List<DataModel> list;

    public MyRecycleeAdapter(List<DataModel> list) {
        if (list == null) {
            throw new IllegalArgumentException("list 不能为 null");
        }
        this.list = list;
    }

    @Override
    public ListItemViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
        //list_item.xml 文件就不贴了
        View view = LayoutInflater.from(viewGroup.getContext())
                .inflate(R.layout.list_item, viewGroup, false);
        return new ListItemViewHolder(view);
    }

    @Override
    public void onBindViewHolder(ListItemViewHolder listItemViewHolder, int i) {
        DataModel dataModel = list.get(i);
        listItemViewHolder.name.setText(dataModel.getName());
        listItemViewHolder.address.setText(dataModel.getAddress());
    }

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


    //ViewHolder
    public static final class ListItemViewHolder
            extends RecyclerView.ViewHolder {
        TextView name;
        TextView address;

        ListItemViewHolder(View itemView) {
            super(itemView);

            name = (TextView) itemView.findViewById(R.id.name);
            address = (TextView) itemView.findViewById(R.id.address);
        }
    }

}

以上 就可以跑一个最简单的list了

熟悉 ListView 用法的话使用 RecyclerView 几乎没有难度

参考文章: