Shulou(Shulou.com)06/02 Report--

Adapter 中如何为RecyclerView添加单击事件，相信很多没有经验的人对此束手无策，为此本文总结了问题出现的原因和解决方法，通过这篇文章希望你能解决这个问题。

RecyclerView 的每个Item的点击事件并没有像 ListView 一样封装在组件中，需要 Item 的单击事件时就需要自己去实现，在 Adapter 中为RecyclerView 添加单击事件参考如下：

第一步：

在 RecyclerView 的 Adapyer 中定义单击事件的回调接口：

/** * 定义 RecyclerView 选项单击事件的回调接口 */public interface OnItemClickListener{ //参数（父组件，当前单击的View,单击的View的位置，数据） void onItemClick(RecyclerView parent,View view, int position, String data);}第二步：

在RecyclerView的Adapyer中声明该接口，并提供setter方法：

private OnItemClickListener onItemClickListener;public void setOnItemClickListener(OnItemClickListener onItemClickListener){ this.onItemClickListener = onItemClickListener;}第三步：

在RecyclerView的Adapyer类实现View.OnClickListener接口，并重写onClick(View view)方法，然后设置给接口的事件监听：

public class RvAdapter1 extends RecyclerView.Adapter implements View.OnClickListener{ ... view.setOnClickListener(this);//设置监听器 ... @Override public void onClick(View view) { //根据RecyclerView获得当前View的位置 int position = recyclerView.getChildAdapterPosition(view); //程序执行到此，会去执行具体实现的onItemClick()方法 if (onItemClickListener!=null){ onItemClickListener.onItemClick(recyclerView,view,position,mList.get(position)); } } ...}第四步：

在MainActivity中通过Adapter设置每个Item的单击事件：

adapter.setOnItemClickListener(new RvAdapter1.OnItemClickListener() { @Override public void onItemClick(RecyclerView parent, View view, int position, String data) { Toast.makeText(MainActivity.this, data, Toast.LENGTH_SHORT).show(); }});参考代码Adapter/** * Created by jzman on 2017/5/13 0013. * RecycleView的Adapter */public class RvAdapter1 extends RecyclerView.Adapter implements View.OnClickListener{ private Context mContext; private RecyclerView recyclerView; private ArrayList mList; public RvAdapter1() {} public RvAdapter1(Context mContext, ArrayList mList) { this.mContext = mContext; this.mList = mList; } /** * 用于创建ViewHolder * @param parent * @param viewType * @return */ @Override public DataViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View view = LayoutInflater.from(mContext).inflate(R.layout.item,null); view.setOnClickListener(this); //使用代码设置宽高（xml布局设置无效时） view.setLayoutParams(new ViewGroup.LayoutParams( ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT)); DataViewHolder holder = new DataViewHolder(view); return holder; } /** * 绑定数据 * @param holder * @param position */ @Override public void onBindViewHolder(DataViewHolder holder, int position) { holder.tv_data.setText(mList.get(position)); } /** * 选项总数 * @return */ @Override public int getItemCount() { return mList.size(); } @Override public void onClick(View view) { //根据RecyclerView获得当前View的位置 int position = recyclerView.getChildAdapterPosition(view); //程序执行到此，会去执行具体实现的onItemClick()方法 if (onItemClickListener!=null){ onItemClickListener.onItemClick(recyclerView,view,position,mList.get(position)); } } /** * 创建ViewHolder */ public static class DataViewHolder extends RecyclerView.ViewHolder{ TextView tv_data; public DataViewHolder(View itemView) { super(itemView); tv_data = (TextView) itemView.findViewById(R.id.tv_recycle); } } private OnItemClickListener onItemClickListener; public void setOnItemClickListener(OnItemClickListener onItemClickListener){ this.onItemClickListener = onItemClickListener; } /** * 定义RecyclerView选项单击事件的回调接口 */ public interface OnItemClickListener{ //参数（父组件，当前单击的View,单击的View的位置，数据） void onItemClick(RecyclerView parent,View view, int position, String data); } /** * 将RecycleView附加到Adapter上 */ @Override public void onAttachedToRecyclerView(RecyclerView recyclerView) { super.onAttachedToRecyclerView(recyclerView); this.recyclerView= recyclerView; } /** * 将RecycleView从Adapter解除 */ @Override public void onDetachedFromRecyclerView(RecyclerView recyclerView) { super.onDetachedFromRecyclerView(recyclerView); this.recyclerView = null; }}MainActivity/** * Created by jzman on 2017/5/13 0013. */public class MainActivity extends AppCompatActivity { private RecyclerView rv; RvAdapter1 adapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); rv = (RecyclerView) findViewById(R.id.rv); //设置布局管理器// rv.setLayoutManager(new LinearLayoutManager(this));//线性 rv.setLayoutManager(new GridLayoutManager(this,4));//线性// rv.setLayoutManager(new StaggeredGridLayoutManager(4,StaggeredGridLayoutManager.VERTICAL));//线性 adapter = new RvAdapter1(this,initData()); adapter.setOnItemClickListener(new RvAdapter1.OnItemClickListener() { @Override public void onItemClick(RecyclerView parent, View view, int position, String data) { Toast.makeText(MainActivity.this, data, Toast.LENGTH_SHORT).show(); } }); rv.setAdapter(adapter); } public static ArrayList initData(){ ArrayList arrayList = new ArrayList(); for (int i=0;i

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