baseadapter适配器（baseadapter适配器）.docVIP

baseadapter适配器（baseadapter适配器） Custom adapter case A case of mixed map and text: The first step: to use the component definition ListView listview=null; The second step: writing a method, data processing method in Public void (initdata) { ListMapString, Object data=new ArrayListMapString (Object); For (int i=1; i=10; i++) { MapString, Object map=new HashMapString (Object); Map.put (image, R.drawable.ic_launcher); Map.put (content, head and read); Data.add (map); } } The third step: Custom adapter 1 defines a static inner class, the definition of various components in the layout Static class ViewHolder{ Public ImageView image; / / in the custom layout file to do oh Public TextView content; } 2 custom adapter Public class MyAdapter extends BaseAdapter{ Loading / layout file Private LayoutInflater layoutInflater; Public MyAdapter (Context context) { LayoutInflater= (layoutInflater) context.getSystemService (Context.LAYOUT_INFLATER_SERVICE); } In / / BaseAdapter class inheritance must achieve four methods Get / / data size Public int (getCount) { Return (data.size); } Get / position Public Object getItem (int position) { Return position; } Get / / location number Public long getItemId (int position) { Return position; } / / Public View getView (int position, View convertView, ViewGroup parent) { ViewHolder holder =null; If (convertView==null) { Loading / layout file ConvertView=layoutInflater.inflate (R.layout.item, null); Hodler=new (ViewHolder); / / will get the control object in Hodler Hodler.image= (ImageView) convertView.findViewById (R.id.image); Hodler.image= (TextView) convertView.findViewById (R.id.content); Do / / tag markers ConvertView.setTag (holder); }else{ Hodler= (ViewHolder) (converView.getTag); } / / bind data to the control Holder.image.setBackgroundResource ((Integer) data.get (position).Get (image)); Holder.content.setText (data.get (postion).Get (content) (.ToString)); Return convertView; } The fourth step: add adapter in the host UI Listview.SetAd