android listview万能适配器

public class CommonViewHolder {

private Context context;
private int position;
private int layoutId;

private View convertView;
private SparseArray<View> views;

private CommonViewHolder(Context context, ViewGroup parent, int layoutId, int position) {
this.context = context;
this.layoutId = layoutId;
this.position = position;
views = new SparseArray<>();
convertView = View.inflate(context, layoutId, null);
convertView.setTag(this);
}

public static CommonViewHolder getInstance(Context context, ViewGroup parent, int resId, int position, View convertView) {
if (convertView == null) {
return new CommonViewHolder(context, parent, resId, position);
} else {
CommonViewHolder holder = (CommonViewHolder) convertView.getTag();
holder.position = position;
return holder;
}
}

public int getPosition() { return position;   }

public View getConvertView() { return convertView;  }

public <T extends View> T getView(int viewId) {
View view = views.get(viewId);
if (view == null) {
view = this.convertView.findViewById(viewId);
views.put(viewId, view);
}
return (T) view;
}

public CommonViewHolder setText(int viewId, String text) {
((TextView) getView(viewId)).setText(text);
return this;
}

public CommonViewHolder setImageResource(int viewId, int resId) {
((ImageView) getView(viewId)).setImageResource(resId);
return this;
}

public CommonViewHolder setOnClickListener(int viewId, View.OnClickListener onClickListener) {
getView(viewId).setOnClickListener(onClickListener);
return this;
}
}

public abstract class CommonAdapter<T> extends BaseAdapter {
private List<T> datas;
private Context context;
private int layoutId;

public CommonAdapter(Context context, List<T> datas, int layoutId) {
super();
this.datas = datas;
this.context = context;
this.layoutId = layoutId;
}

@Override
public int getCount() {return datas == null ? 0 : datas.size(); }

@Override
public T getItem(int position) {return datas.get(position); }

@Override
public long getItemId(int position) {return position;}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
CommonViewHolder holder = CommonViewHolder.getInstance(context, parent, layoutId, position, convertView);
convert(holder, datas.get(position));
return holder.getConvertView();
}

public abstract void convert(CommonViewHolder holder, T t);
}