Simple ViewHolder and viewholder

Simple ViewHolder and viewholder

This method is written by a foreign company.

Provides a static method:

public class ViewHolder {    @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;    }}

Use the following in getView:

public View getView(int position, View convertView, ViewGroup parent) {    if (convertView == null) {        convertView = LayoutInflater.from(context)          .inflate(R.layout.banana_phone, parent, false);    }    ImageView bananaView = ViewHolder.get(convertView, R.id.banana);    TextView phoneView = ViewHolder.get(convertView, R.id.phone);    BananaPhone bananaPhone = getItem(position);    phoneView.setText(bananaPhone.getPhone());    bananaView.setImageResource(bananaPhone.getBanana());    return convertView;}

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