Recycleview的adapter封装

ViewHolder封装

public class ViewHolder extends RecyclerView.ViewHolder {
private SparseArray<View> mViews;
private View mConvertView;
private Context mContext;

public ViewHolder(Context context, View itemView, ViewGroup parent) {
super(itemView);
mContext = context;
mConvertView = itemView;
mViews = new SparseArray<View>();
}

public static ViewHolder get(Context context, ViewGroup parent, int layoutId) {

View itemView = LayoutInflater.from(context).inflate(layoutId, parent, false);
ViewHolder holder = new ViewHolder(context, itemView, parent);
return holder;
}
/**
* 通过viewId获取控件
*
* @param viewId
* @return
*/
public <T extends View> T getView(int viewId)
{
View view = mViews.get(viewId);
if (view == null)
{
view = mConvertView.findViewById(viewId);
mViews.put(viewId, view);
}
return (T) view;
}
}

adapter封装

public abstract class CommonAdapter<T> extends RecyclerView.Adapter<ViewHolder>{
protected Context mContext;
protected int mLayoutId;
protected List<T> mDatas;
protected LayoutInflater mInflater;

public CommonAdapter(Context context, int layoutId, List<T> datas)
{
mContext = context;
mInflater = LayoutInflater.from(context);
mLayoutId = layoutId;
mDatas = datas;
}

@Override
public ViewHolder onCreateViewHolder(final ViewGroup parent, int viewType)
{
ViewHolder viewHolder = ViewHolder.get(mContext, parent, mLayoutId);
return viewHolder;
}

@Override
public void onBindViewHolder(ViewHolder holder, int position) {
//        holder.updatePosition(position);
convert(holder, mDatas.get(position),position);
}

public abstract void convert(ViewHolder holder, T t,int postion);

@Override
public int getItemCount() {
return mDatas.size();
}
}

使用

idRecy.setAdapter(new CommonAdapter(RecyDemoActivity.this, R.layout.recly_item_layout, arrList) {

@Override
public void convert(ViewHolder holder, Object o,int postion) {

String mStr=o.toString();
TextView tvLL = holder.getView(R.id.tv_item_text);
tvLL.setText(mStr);
}

//            @Override
//            public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
//
//            }
});