Android常用控件之RecyclerView

目錄:android.support.v7.widget.RecyclerView

xml布局:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/my_recycler_view"
        android:scrollbars="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
</RelativeLayout>

代碼使用:

public class MainActivity extends AppCompatActivity {
    private RecyclerView mRecyclerView;
    private RecyclerView.Adapter mAdapter;
    private RecyclerView.LayoutManager mLayoutManager;

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

    private void initView() {
        mRecyclerView = (RecyclerView) findViewById(R.id.my_recycler_view);
        // 設(shè)置布局管理器
        mLayoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
        mRecyclerView.setLayoutManager(mLayoutManager);
        // 設(shè)置adapter
        mRecyclerView.setAdapter(mAdapter = new RvAdapter(getData()));
    }

    private List<String> getData() {
        List<String> data = new ArrayList<>();
        String temp = " item";
        for(int i = 0; i < 20; i++) {
            data.add(i + temp);
        }
        return data;
    }

}

使用的適配器:

public class RvAdapter extends RecyclerView.Adapter<RvAdapter.ViewHolder>{

    private List<String> mData;

    public RvAdapter(List<String> data) {
        this.mData = data;
    }

    public void updateData(List<String> data) {
        this.mData = data;
        notifyDataSetChanged();
    }

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

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        holder.processData(position);
    }

    @Override
    public int getItemCount() {
        return mData == null ? 0 : mData.size();
    }

    public class ViewHolder extends RecyclerView.ViewHolder {

        private TextView tv_title;

        public ViewHolder(View itemView) {
            super(itemView);
            tv_title = (TextView) itemView.findViewById(R.id.tv_title);
        }

        private void processData(int position) {
            tv_title.setText(mData.get(position));
        }
    }
}
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