安卓Recyclerview

RecyclerView 是Android L版本中新添加的一個用來取代ListView的SDK，它的靈活性與可替代性比listview更好

1、添加依賴
在AS的build.gradle中添加依賴，然後同步一下就可以引入依賴包

dependencies {
compile 'com.android.support:recyclerview-v7:21.0.+'
}

2、編寫代碼

public class MainActivity extends AppCompatActivity {

    private RecyclerView rv;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
      //創建默認的線性LayoutManager
        rv=new RecyclerView(this);
        setContentView(rv);

        rv.setLayoutManager(new LinearLayoutManager(this));

        //創建適配器Adapter
        rv.setAdapter(new RecyclerView.Adapter() {


            //自定義的類，持有每個Item的的所有界面元素
            class ViewLay extends RecyclerView.ViewHolder{
                private TextView tv;
                public ViewLay(View itemView) {
                    super(itemView);
                    tv= (TextView) itemView;
                }

                public TextView getTv() {
                    return tv;
                }
            }
            //創建數組
            private String []data=new String[]{"ck","vk","yoyo"};



            //創建新View，被LayoutManager所調用
            @Override
            public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
                return new ViewLay(new TextView(parent.getContext()));
            }


            //將數據與界面進行綁定的操作
            @Override
            public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
               ViewLay vl= (ViewLay) holder;
                vl.getTv().setText(data[position]);
            }


            //獲取數據的數量
            @Override
            public int getItemCount() {
                return data.length;
            }
        });


    }
}

寫完這些代碼這個例子既可以跑起來了。從例子也可以看出來，RecyclerView的用法並不比ListView複雜，反而更靈活好用