https://plus.google.com/u/0/events/chlh8qqr5q5grs1lajpqnvvql8kcfem=1&authkey=CNXMrZuHsMWhNg
explain by website:
https://www.bignerdranch.com/blog/customizing-android-listview-rows-subclassing/
http://guides.codepath.com/android/Using-an-ArrayAdapter-with-ListView#using-a-custom-arrayadapter
ArrayAdapter
simple use
when only want to show same simple thing in the list view
for example ,a single text in the list view
ListAdapter adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, new String[]{"A", "B", "C", "D"});
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custom the adapter
create a class that extends ArrayAdapte
oerrride a constructor
overrride the get view
remember!!!! in the getVIew
we need to check is the convertView==null
public class MyArrayAdapter extends ArrayAdapter<MyStoreClass> {
public MyArrayAdapter(Context context, int resource, List<MyStoreClass> objects) {
super(context, resource, objects);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
MyStoreClass store = getItem(position);
if(convertView==null){
convertView=LayoutInflater.from(getContext()).inflate(R.layout.lisview_layout,parent,false);
}
TextView tv1 = (TextView) convertView.findViewById(R.id.tvList1);
TextView tv2 = (TextView) convertView.findViewById(R.id.tvList2);
tv1.setText(store.getN1()+"");
tv2.setText(store.getN2()+"");
return convertView;
}
}
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