RecyclerView基本用法

1. 在gradle.build的dependencies中添加RecyclerView需要的包

compile 'com.android.support:cardview-v7:23.4.0'
compile 'com.android.support:recyclerview-v7:23.4.0'

添加完后记得要Sync Gradle

 

2. 在布局文件中添加控件RecyclerView. 

<android.support.v7.widget.RecyclerView
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
    
</android.support.v7.widget.RecyclerView>

3.在Activity中找到RecyclerView并设置LayoutManager和Adapter

RecyclerView rv;

NewsAdapter adapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    rv = (RecyclerView) findViewById(R.id.rv);
    rv.setLayoutManager(new LinearLayoutManager(this));
    rv.setAdapter(adapter);

}

4. 写Adapter

class NewsAdapter extends RecyclerView.Adapter<NewsAdapter.VH> {
    String[] data = {"a","b","c","d","e"};

　　//创建ViewHoler
    @Override
    public VH onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.news_item,parent,false);
        VH vh = new VH(view);
        return vh;
    }

　　//数据绑定
    @Override
    public void onBindViewHolder(VH holder, int position) {
        holder.title.setText(data[position]);

    }

    @Override
    public int getItemCount() {
        return data.length;
    }
  
　　//内部类VH 保存所有view
    class VH extends RecyclerView.ViewHolder {
        public TextView title;
        public VH(View itemView) {
            super(itemView);
            title = (TextView)itemView.findViewById(R.id.title);
        }
    }


}