ViewHolder mode: Simple Writing and viewholder mode writing
public View getView(final int position, View convertView, ViewGroup parent) { if (convertView == null) convertView = LayoutInflater.from(mContext).inflate(R.layout.item, parent, false); TextView name = ViewHolder.get(convertView, R.id.tv_name); name.setText(""); return convertView;}class ViewHolder { // I added a generic return type to reduce the casting noise in client code @SuppressWarnings("unchecked") public static <T extends View> T get(View view, int id) { SparseArray<View> viewHolder = (SparseArray<View>) view.getTag(); if (viewHolder == null) { viewHolder = new SparseArray<View>(); view.setTag(viewHolder); } View childView = viewHolder.get(id); if (childView == null) { childView = view.findViewById(id); viewHolder.put(id, childView); } return (T) childView; }}
It is worth noting that the SparseArray knowledge point, the optimized hashmap for storing integer and object key-value pairs
Source: http://www.eoeandroid.com/thread-321547-1-1.html