Android TV开发：使用RecycleView实现横向的Listview并响应点击事件的代码

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;   }   });  }  } //... } 

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);   }  }); 

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

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

//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);  } } 

<?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>