本文讲述了Android TV开发：使用RecycleView实现横向的Listview并响应点击事件的代码。分享给大家供大家参考，具体如下：
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
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{ //... 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 mDatas;
public EasyLayout(Context context) {
super(context);
mDatas = new ArrayList();
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{ private Context mContext; private List 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 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
6.源码及apk
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