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November 27, 2015 08:29
Android，抽象ArrayAdapter与ViewHolder之间的代码
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| import android.content.Context; | |
| import android.view.LayoutInflater; | |
| import android.view.View; | |
| import android.view.ViewGroup; | |
| import android.widget.ArrayAdapter; | |
| /** | |
| * @author solo | |
| */ | |
| public abstract class MagicArrayAdapter<T> extends ArrayAdapter<T> { | |
| private final LayoutInflater mInflater; | |
| private final int mResource; | |
| public MagicArrayAdapter(Context context, int resource) { | |
| super(context, resource); | |
| mResource = resource; | |
| mInflater = LayoutInflater.from(context); | |
| } | |
| @Override | |
| public View getView(int position, View convertView, ViewGroup parent) { | |
| MagicViewHolder<T> h; | |
| if (convertView == null) { | |
| convertView = mInflater.inflate(mResource, parent, false); | |
| h = getViewHolder(position, convertView, parent); | |
| convertView.setTag(h); | |
| } else { | |
| h = (MagicViewHolder<T>) convertView.getTag(); | |
| } | |
| h.populateView(position, convertView, parent, getItem(position)); | |
| return convertView; | |
| } | |
| abstract public MagicViewHolder<T> getViewHolder(int position, View convertView, ViewGroup parent); | |
| } |
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| import android.view.View; | |
| import android.view.ViewGroup; | |
| import android.widget.ImageView; | |
| /** | |
| * @author solo | |
| */ | |
| public abstract class MagicViewHolder<T> { | |
| public MagicViewHolder(View view) { | |
| } | |
| /** | |
| * 更新AdapterView的每个item | |
| */ | |
| abstract public void populateView(int position, View convertView, ViewGroup parent, T item); | |
| } |
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