RecyclerView条目点击和长按

来源：互联网发布：人工智能专业就业大学编辑：程序博客网时间：2024/05/22 02:40
RecyclerView虽然很强大，但是没有点击事件，美中不足！所以需要自己写点击事件啦。
Activity界面
public class MainActivity extends AppCompatActivity {    private RecyclerView rv;    private SwipeRefreshLayout sr;    private List<String> data;    private MyRecyclerViewAdapter adapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initView();//初始化view        initData();//填充数据        //条目点击事件,调用适配器写的条目点击的方法        adapter.setOnItemClickListener(new OnItemClickListener() {            @Override            public void setOnItemClickListener(View view, int position) {                Toast.makeText(MainActivity.this,"这是条目"+position,Toast.LENGTH_SHORT).show();            }        });        //条目长按事件,调用适配器写的条目长按的方法        adapter.setOnLongClickListener(new OnLongClickListener() {            @Override            public void setOnLongClickListener(View view, int position) {                //长按删除                data.remove(position);                //刷新适配器                adapter.notifyDataSetChanged();            }        });        sr.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {            @Override            public void onRefresh() {                initData();                sr.setRefreshing(false);            }        });    }    private void initData() {        data = new ArrayList<>();        for (int i = 0; i <20; i++) {            data.add("这是条目"+i);        }        adapter = new MyRecyclerViewAdapter(MainActivity.this, data);        rv.setAdapter(adapter);//设置适配器    }    private void initView() {        rv = (RecyclerView) findViewById(R.id.rv);        sr = (SwipeRefreshLayout) findViewById(R.id.sr);        LinearLayoutManager linearLayoutManager=new LinearLayoutManager(this);//线性样式显示，和ListView显示的布局格式一致        GridLayoutManager gridLayoutManager=new GridLayoutManager(this,3);//九宫格样式显示,和GridView显示的布局格式一致        StaggeredGridLayoutManager staggeredGridLayoutManager=new StaggeredGridLayoutManager(3,StaggeredGridLayoutManager.VERTICAL);//瀑布流样式显示        rv.setLayoutManager(linearLayoutManager);//LinearLayoutManager、gridLayoutManager、staggeredGridLayoutManager三者都可使用    }}activity_main布局文件：<LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"   >    <android.support.v4.widget.SwipeRefreshLayout        android:layout_width="match_parent"        android:layout_height="match_parent"        android:id="@+id/sr">        <android.support.v7.widget.RecyclerView            android:layout_width="match_parent"            android:layout_height="match_parent"            android:id="@+id/rv">        </android.support.v7.widget.RecyclerView>    </android.support.v4.widget.SwipeRefreshLayout></LinearLayout>
适配器布局文件
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical" android:layout_width="match_parent"    android:layout_height="match_parent">    <TextView        android:padding="20dp"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/tv"/></LinearLayout>

 
适配器代码：
public class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.MyViewHolder> {    private List<String> data=new ArrayList<>();    private Context context;    //定义两个变量，接收条目点击和长按的对象    private OnItemClickListener mOnItemClickListener;    private OnLongClickListener mOnLongClickListener;    public MyRecyclerViewAdapter(Context context,List<String> data){        this.context=context;        this.data=data;    }    //创建条目点击的方法，用变量接收一下接口对象    public void setOnItemClickListener(OnItemClickListener onItemClickListener){        this.mOnItemClickListener=onItemClickListener;    }    //创建条目长按的方法，用变量接收一下接口对象    public void setOnLongClickListener(OnLongClickListener onLongClickListener){        this.mOnLongClickListener=onLongClickListener;    }    @Override    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        //创建自己的ViewHolder        View view = LayoutInflater.from(context).inflate(R.layout.recycletview, null);        MyViewHolder myViewHolder=new MyViewHolder(view);        return myViewHolder;    }    @Override    public void onBindViewHolder(final MyViewHolder holder, final int position) {        holder.tv.setText(data.get(position));        //holder的视图点击监听        holder.itemView.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {               mOnItemClickListener.setOnItemClickListener(holder.tv,position);//控件和条目下标            }        });        //holder的条目视图长按监听        holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {            @Override            public boolean onLongClick(View view) {                mOnLongClickListener.setOnLongClickListener(holder.tv,position);                return false;            }        });    }    @Override    public int getItemCount() {        return data!=null?data.size():0;    }    //创建ViewHolder    class MyViewHolder extends RecyclerView.ViewHolder{        private  TextView tv;        public MyViewHolder(View itemView) {            super(itemView);            //使用itemView找到控件            tv = (TextView) itemView.findViewById(R.id.tv);        }    }}
  两个接口：
public interface OnItemClickListener {    void setOnItemClickListener(View view,int position);}public interface OnLongClickListener {    void setOnLongClickListener(View view, int position);}
 代码就这么多，很好理解！
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