public class AppManagerAdapter extends BaseAdapter {
private static final String TAG = "AppManagerAdapter";
private List appinfos;
private Context context;
//把要创建的ImageView和TextView定义在外面成静态
private static ImageView iv;
private static TextView tv;
public AppManagerAdapter(List appinfos, Context context) {
this.appinfos = appinfos;
this.context = context;
}
public int getCount() {
// TODO Auto-generated method stub
return appinfos.size();
}
public Object getItem(int position) {
// TODO Auto-generated method stub
return appinfos.get(position);
}
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
/**
* View convertView (转化view对象 ,历史view对象的缓存) convertview 就是拖动的时候被回收掉的view对象
*/
public View getView(int position, View convertView, ViewGroup parent) {
AppInfo info = appinfos.get(position);
View view;
if (convertView == null) {
Log.i(TAG,"通过资源文件 创建view对象");
view = View.inflate(context, R.layout.app_item, null);
} else {
Log.i(TAG,"使用历史缓存view对象");
view = convertView;
}
iv = (ImageView) view.findViewById(R.id.iv_app_icon);
tv = (TextView) view.findViewById(R.id.tv_app_name);
iv.setImageDrawable(info.getIcon());
tv.setText(info.getAppname());
return view;
}
}
