android TV开发：使用RecycleView实现横向的Listview并响应点击事件

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1.先贴出自己的效果图(可横向滚动，并响应item点击事件)：

2.关于点击事件的实现细节：参考鸿洋老师的博客

核心：使用接口回调

在adapter中自己定义了个接口，然后在onBindViewHolder中去为holder.itemView去设置相应的监听最后回调我们设置的监听。

class HomeAdapter extends RecyclerView.Adapter<HomeAdapter.MyViewHolder>{//...    public interface OnItemClickLitener    {        void onItemClick(View view, int position);        void onItemLongClick(View view , int position);    }    private OnItemClickLitener mOnItemClickLitener;    public void setOnItemClickLitener(OnItemClickLitener mOnItemClickLitener)    {        this.mOnItemClickLitener = mOnItemClickLitener;    }    @Override    public void onBindViewHolder(final MyViewHolder holder, final int position)    {        holder.tv.setText(mDatas.get(position));        // 如果设置了回调，则设置点击事件        if (mOnItemClickLitener != null)        {            holder.itemView.setOnClickListener(new OnClickListener()            {                @Override                public void onClick(View v)                {                    int pos = holder.getLayoutPosition();                    mOnItemClickLitener.onItemClick(holder.itemView, pos);                }            });            holder.itemView.setOnLongClickListener(new OnLongClickListener()            {                @Override                public boolean onLongClick(View v)                {                    int pos = holder.getLayoutPosition();                    mOnItemClickLitener.onItemLongClick(holder.itemView, pos);                    return false;                }            });        }    }//...}

在activity设置监听，并实现接口

 mAdapter.setOnItemClickLitener(new OnItemClickLitener()        {            @Override            public void onItemClick(View view, int position)            {                Toast.makeText(HomeActivity.this, position + " click",                        Toast.LENGTH_SHORT).show();            }            @Override            public void onItemLongClick(View view, int position)            {                Toast.makeText(HomeActivity.this, position + " long click",                        Toast.LENGTH_SHORT).show();                        mAdapter.removeData(position);            }        });

3.实现横向效果

核心：LinearLayoutManager

   LinearLayoutManager linearLayoutManager =  new LinearLayoutManager(mContext,LinearLayoutManager.HORIZONTAL,false);   mRecyclerView.setLayoutManager(linearLayoutManager);

4. 让RecyclerView的子item获得焦点

mRecyclerView.setOnFocusChangeListener(new OnFocusChangeListener() {            @Override            public void onFocusChange(View v, boolean hasFocus) {                if(hasFocus){                    if(mRecyclerView.getChildCount()>0){                        mRecyclerView.getChildAt(0).requestFocus();                    }                }            }        });

5.代码实现：

//定义自己的布局文件public class EasyLayout extends LinearLayout{    private MyAdapter mAdapter;    private RecyclerView mRecyclerView;    private Context mContext;    private List<String> mDatas;    public EasyLayout(Context context) {        super(context);        mDatas = new ArrayList<String>();        for (int i=0;i<20;i++){            String str = "图片:"+i;            mDatas.add(str);        }        this.setBackgroundColor(Color.parseColor("#407EAf"));        this.mContext = context;        this.setOrientation(VERTICAL);        createLayout();    }    private void createLayout() {        //空出上边留白        TextView te = new TextView(mContext);        ViewGroup.LayoutParams lp = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,160);        this.addView(te,lp);        mRecyclerView = new RecyclerView(mContext);        lp = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.WRAP_CONTENT);        this.addView(mRecyclerView,lp);        LinearLayoutManager linearLayoutManager =  new LinearLayoutManager(mContext,LinearLayoutManager.HORIZONTAL,false);        mRecyclerView.setLayoutManager(linearLayoutManager);        //设置适配器        mAdapter = new MyAdapter( mContext,mDatas);        mRecyclerView.setAdapter(mAdapter);        //监听点击事件        mAdapter.setmOnItemClickLitener(new MyAdapter.OnItemClickLitener() {            @Override            public void onItemClick(View view, int position) {                Toast.makeText(mContext,"点击了图片:"+position,Toast.LENGTH_SHORT).show();            }        });    //让RecyclerView的子item获得焦点        mRecyclerView.setOnFocusChangeListener(new OnFocusChangeListener() {            @Override            public void onFocusChange(View v, boolean hasFocus) {                if(hasFocus){                    if(mRecyclerView.getChildCount()>0){                        mRecyclerView.getChildAt(0).requestFocus();                    }                }            }        });    }

//定义适配器类    public static class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder>    {        private Context mContext;        private List<String> mDatas;        private LayoutInflater mInflater;        private  OnItemClickLitener mOnItemClickLitener;        //定义点击事件的接口        public interface OnItemClickLitener        {            void onItemClick(View view, int position);        }        public MyAdapter( Context mContext,List<String> datats)        {            this.mContext = mContext;            this.mDatas = datats;            mInflater = LayoutInflater.from(this.mContext);        }        public void setmOnItemClickLitener(OnItemClickLitener mOnItemClickLitener)        {            this.mOnItemClickLitener = mOnItemClickLitener;        }        @Override        public int getItemCount()        {            return mDatas.size();        }        /**         * 创建ViewHolder         */        @Override        public ViewHolder onCreateViewHolder(ViewGroup parent, int i)        {            View view = mInflater.inflate(R.layout.easy_item,null);            ViewHolder viewHolder = new ViewHolder(view);            return viewHolder;        }        /**         * 设置值         */        @Override        public void onBindViewHolder(final ViewHolder viewHolder, final int position)        {            viewHolder.btn.setText(mDatas.get(position));            viewHolder.btn.setTextSize(40);            viewHolder.btn.setGravity(Gravity.CENTER);            //设置回调            if (mOnItemClickLitener != null){                viewHolder.btn.setOnClickListener(new OnClickListener() {                    @Override                    public void onClick(View v) {                        int pos = viewHolder.getLayoutPosition();                        mOnItemClickLitener.onItemClick( viewHolder.btn,pos);                    }                });            }        }        public class ViewHolder extends RecyclerView.ViewHolder  //我们需要inflate的item布局需要传入        {            Button btn;            public ViewHolder(View arg0)            {                super(arg0);                btn = (Button) arg0.findViewById(R.id.btn);            }        }    }

//在activity加载自己的布局public class GallarRecyActivity extends AppCompatActivity {    @Override    protected void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        EasyLayout easyLayout = new EasyLayout(this);        setContentView(easyLayout);    }}

easy_item.xml文件

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="horizontal" android:layout_width="match_parent"    android:layout_height="match_parent">    <Button        android:id="@+id/btn"        android:layout_width="320dp"        android:layout_height="430dp" /></LinearLayout>

6.源码及apk

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