RecyclerView的使用

简单使用

1.添加依赖

compile 'com.android.support:design:24.2.0'

2.Activity布局

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.konfyt.myapplication.MainActivity">    <android.support.v7.widget.RecyclerView        android:id="@+id/mRecyclerView"        android:layout_width="match_parent"        android:layout_height="match_parent" /></RelativeLayout>

3.Item布局

<?xml version="1.0" encoding="utf-8"?><!-- 注意：RecyclerView 的 LinearLayoutManager,     item的最外层布局参数是有效的 --><LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="horizontal"    android:layout_width="match_parent"    android:layout_height="wrap_content">    <ImageView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_margin="20dp"        android:src="@mipmap/ic_launcher"/>    <TextView        android:id="@+id/item_textView"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:gravity="center"        android:textSize="25sp"/></LinearLayout>

4.创建Model 作为RecyclerView的数据源

public class MyModel {    private String msg;    public String getMsg() {        return msg;    }    public void setMsg(String msg) {        this.msg = msg;    }}

5.RecyclerView的适配器

/** * 创建Adapter继承RecyclerView.Adapter<VH> *     需要一个ViewHolder作为泛型 *     此ViewHolder需要继承RecyclerView.ViewHolder */public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder>{    private List<MyModel> data;    private LayoutInflater inflater;    public MyAdapter(List<MyModel> data, Context context) {        this.data = data;        inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);    }    // 获取数据源的个数    @Override    public int getItemCount() {        return data==null?0:data.size();    }    /**     * 创建ViewHolder     * @param parent itemView的父控件     * @param viewType 用来加载不同的布局（多布局）     * @return     */    @Override    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        View itemView = inflater.inflate(R.layout.item,parent,false);        //public ViewHolder(View itemView)        return new ViewHolder(itemView);    }    // 加载数据    @Override    public void onBindViewHolder(ViewHolder holder, int position) {        holder.mTextView.setText(data.get(position).getMsg());    }    static class ViewHolder extends RecyclerView.ViewHolder{        TextView mTextView;        public ViewHolder(View itemView) {            super(itemView);            mTextView = (TextView) itemView.findViewById(R.id.item_textView);        }    }}

6.绑定适配器

public class MainActivity extends AppCompatActivity {    private RecyclerView mRecyclerView;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initView();    }    private void initView() {        mRecyclerView = (RecyclerView) findViewById(R.id.mRecyclerView);        // RecyclerView 需要使用布局管理器        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));        List<MyModel> data = getData();        MyAdapter adapter = new MyAdapter(data,this);        mRecyclerView.setAdapter(adapter);    }    private List<MyModel> getData() {        List<MyModel> data = new ArrayList<>();        for (int i = 0; i < 10; i++) {            MyModel myModel = new MyModel();            myModel.setMsg("item"+i);            data.add(myModel);        }        return data;    }}

7.效果

进阶 - 点击事件

方式一：（在adapter里操作）

@Override    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        View itemView = inflater.inflate(R.layout.item,parent,false);        // 方式一：填充itemView的时候，为itemView设置点击事件        // 当前MyAdapter实现View.OnClickListener        itemView.setOnClickListener(this);        // public ViewHolder(View itemView)        return new ViewHolder(itemView);    }

// 重写点击事件@Override    public void onClick(View view) {        // onClick(View view) 此时的view 就是点击的itemView        // public int getChildAdapterPosition(@Nullable android.view.View child)        // 此方法可以返回 这个itemView 的 position        int position = mRecyclerView.getChildAdapterPosition(view);        Snackbar.make(view,data.get(position).getMsg(),Snackbar.LENGTH_LONG).show();    }

// RecyclerView绑定适配器的时候 会把recyclerView作为参数传递过来    @Override    public void onAttachedToRecyclerView(RecyclerView recyclerView) {        super.onAttachedToRecyclerView(recyclerView);        mRecyclerView = recyclerView;    }

方式二：接口回调

// 1.定义接口(模拟ListView的OnItemClickListener)public interface OnItemClickListener{        void onItemClick(int position);}

// 2.声明OnItemClickListener接口的引用，并提供setter方法private OnItemClickListener listener;// 提供setter方法public void setListener(OnItemClickListener listener) {    this.listener = listener;}

// 3. 填充itemView的时候，为itemView设置view的点击事件@Overridepublic ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {    View itemView = inflater.inflate(R.layout.item,parent,false);    // 当前MyAdapter实现View.OnClickListener    itemView.setOnClickListener(this);    return new ViewHolder(itemView);}

// 4.重写view的onClick()方法@Overridepublic void onClick(View view) {    int position = mRecyclerView.getChildAdapterPosition(view);    if (listener != null) {        // 将点击事件转移给外面的调用者        listener.onItemClick(position);    }}

// 5.在Activity进行具体实现// 当前activity实现OnItemClickListener接口adapter.setListener(this);@Overridepublic void onItemClick(int position) {    Toast.makeText(this,"当前点击的位置是："+position,Toast.LENGTH_LONG).show();}

源码下载