Android學習筆記之RecyclerView

鑑於RecyclerView較之於ListView和GrideView有較大的靈活性，現在比較流行。

本菜今天學習下RecyclerView

轉載請註明出處#
[我的博客]http://www.lostbug.com

RecyclerView是谷歌V7包下新增的控件,用來替代ListView的使用

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
整體上看RecyclerView架構，提供了一種插拔式的體驗，高度的解耦，異常的靈活，通過設置它提供的不同LayoutManager，ItemDecoration , ItemAnimator實現令人瞠目的效果。

首先，在xml文件中寫入控件：

<android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"/>

在activity中引用，並設置初始化

        RecyclerView mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
        //設置佈局管理器
//        mRecyclerView.setLayoutManager(new LinearLayoutManager(this)) ;//ListView
        mRecyclerView.setLayoutManager(new GridLayoutManager(this, 2));//GridView
//        mRecyclerView.setLayoutManager(new StaggeredGridLayoutManager(2, OrientationHelper.VERTICAL));//瀑布流
        //設置Item添加、移除動畫
        mRecyclerView.setItemAnimator(new DefaultItemAnimator());
        //添加分割線
//        mRecyclerView.addItemDecoration(RecyclerView.ItemDecoration);

重寫RecyclerView的Adapter類

/**
 * www.lostbug.com
 * Created by admin on 2016/6/12.
 */
public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.NormalTextViewHolder> {
    private Context mContext;
    private ArrayList mData;

    public void setData(ArrayList data) {
        mData = data;
    }

    public RecyclerAdapter(Context context) {
        mContext = context;
    }

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

    @Override
    public NormalTextViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        NormalTextViewHolder myViewHolder = 
        new NormalTextViewHolder(LayoutInflater.from(mContext).
        inflate(R.layout.item_recycler, parent, false));
        return myViewHolder;
    }

    @Override
    public void onBindViewHolder(NormalTextViewHolder holder, int position) {
        try {
            holder.tv.setText((String) mData.get(position));
        } catch (Exception e) {
        }
    }

    class NormalTextViewHolder extends RecyclerView.ViewHolder {
        TextView tv;

        public NormalTextViewHolder(View itemView) {
            super(itemView);
            tv = (TextView) itemView.findViewById(R.id.item_textView);
        }
    }
}

最後在activity中給RecyclerView傳入數據：

        RecyclerAdapter mRecyclerAdapter;
        mRecyclerView.setAdapter(mRecyclerAdapter=new RecyclerAdapter(this));
        ArrayList<String> names=new ArrayList<>();
        names.add("Java");
        names.add("Android");
        names.add("C++");
        names.add("PHP");
        names.add("Html");
        names.add("Spring");
        mRecyclerAdapter.setData(names);
        mRecyclerAdapter.notifyDataSetChanged();

RecyclerView的基本功能就實現啦！！！