import android.support.v7.widget.RecyclerView.Adapter;
import android.support.v7.widget.RecyclerView.ViewHolder;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import com.tech.frontier.demo.listeners.OnItemClickListener;
import java.util.ArrayList;
import java.util.List;
/**
* 适用于RecyclerView的抽象Adapter,封装了数据集、ViewHolder的创建与绑定过程,简化子类的操作
*
* @param <D> 数据集中的类型,例如Article等
* @param <V> ViewHolder类型
*/
public abstract class RecyclerBaseAdapter<D, V extends ViewHolder> extends Adapter<V> {
/**
* RecyclerView中的数据集
*/
protected final List<D> mDataSet = new ArrayList<D>();
/**
* 点击事件处理回调
*/
private OnItemClickListener<D> mItemClickListener;
@Override
public int getItemCount() {
return mDataSet.size();
}
protected D getItem(int position) {
return mDataSet.get(position);
}
public void addItems(List<D> items) {
// 移除已经存在的数据,避免数据重复
items.removeAll(mDataSet) ;
// 添加新数据
mDataSet.addAll(items);
notifyDataSetChanged();
}
public void clear() {
mDataSet.clear();
notifyDataSetChanged();
}
/*
* 绑定数据,主要分为两步,绑定数据与设置每项的点击事件处理
* @see
* android.support.v7.widget.RecyclerView.Adapter#onBindViewHolder(android
* .support.v7.widget.RecyclerView.ViewHolder, int)
*/
@Override
public final void onBindViewHolder(V viewHolder, int position) {
final D item = getItem(position);
bindDataToItemView(viewHolder, item);
setupItemViewClickListener(viewHolder, item);
}
protected View inflateItemView(ViewGroup viewGroup, int layoutId) {
return LayoutInflater.from(viewGroup.getContext()).inflate(layoutId, viewGroup, false);
}
public void setOnItemClickListener(OnItemClickListener<D> mItemClickListener) {
this.mItemClickListener = mItemClickListener;
}
/**
* ItemView的点击事件
*
* @param viewHolder
* @param position
*/
protected void setupItemViewClickListener(V viewHolder, final D item) {
viewHolder.itemView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (mItemClickListener != null) {
mItemClickListener.onClick(item);
}
}
});
}
/**
* 将数据绑定到ItemView上
*/
protected abstract void bindDataToItemView(V viewHolder, D item);
}
OnItemClickListener
public interface OnItemClickListener<T> {
public void onClick(T item);
}