RecycleView添加item点击效果

RecycleView不像ListView有自带的item点击效果 所以需要自己手动添加

最直接的方式是在onBindViewHolder()方法中对item添加View.setOnClickedLisetener();

这样如果需要在点击的时候将当前点击的positon传到监听方法中的话，每次onBindViewHolder()方法都会new一个Listener这样需要产生多个对象，未免浪费

所以这里的思路是通过ViewHolder来纪录当前被点击条目的position

上代码

public abstract class BaseRecycleViewAdapter<T extends BaseRecycleViewAdapter.ViewHolder> extends RecyclerView.Adapter<T> {

private OnItemClickListener mOnItemClickListener;

public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

private int mPosition = -1; //由ViewHolder纪录当前item的position 设置默认值为-1

public ViewHolder(View itemView) {
super(itemView);
ButterKnife.bind(this, itemView); //这里使用了ButterKnife来代替findViewById
itemView.setOnClickListener(this);//给ViewHolder添加点击事件
}

public void setPosition(int i) {
mPosition = i; //用于向viewHolder传入position
}

@Override
public void onClick(View v) {
//把点击事件交给OnItemClickListener 来处理
if (mOnItemClickListener != null) {
if (mPosition != -1) {
mOnItemClickListener.onItemClicked(v, mPosition);
} else {
//如果没有给ViewHolder设置position会导致=-1
Debug.e("ViewHolder's positon = -1");
}
}

}
}

//设置监听
public void setOnItemClickListener(OnItemClickListener onItemClickListener) {
mOnItemClickListener = onItemClickListener;
}
//用于最终实现监听的接口
public interface OnItemClickListener {

void onItemClicked(View v, int postion);

}

}

使用时:

class MyAdapter extends BaseRecycleViewAdapter<MonthAdapter.ViewHolder> {

@Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
setOnItemClickListener(new MonthAdapter.OnClickListener());
MyAdapter .ViewHolder holder = new MyAdapter .ViewHolder(LayoutInflater.from(mActivity).inflate(R.layout.myadapter , viewGroup, false));

...

return holder;
}

@Override
public void onBindViewHolder(ViewHolder viewHolder, int i) {
viewHolder.setPosition(i); //一定要运行这个方法

...

}

@Override
public int getItemCount() {

return list.size();
}

class ViewHolder extends BaseRecycleViewAdapter.ViewHolder {
@Bind(R.id.item)
Button item;

public ViewHolder(View itemView) {
super(itemView);
}
}

//实现的点击监听
class OnClickListener implements BaseRecycleViewAdapter.OnItemClickListener {

@Override
public void onItemClicked(View v, int postion) {
//实现监听内容
}
}
}
}

完成