android - ArrayAdapter Initializing not Clear -

i trying create list containing names of available applications on phone triggering implicit intent. being beginner in android following tutorials book. have created custom adapters extending arrayadapter before syntax of simple arrayadapter not being clear me. here is:

arrayadapter<resolveinfo> adapter = new arrayadapter<resolveinfo> (getactivity(),android.r.layout.activity_list_item,activities) {     @override     public view getview(int position, view convertview, viewgroup parent) {         // todo auto-generated method stub         view v =  super.getview(position, convertview, parent);         textview tv = (textview)v;         resolveinfo ri = getitem (position);         tv.settext(ri.loadlabel(pm));         return v;     } }; 

1- why method getview being called in within parenthesis after calling constructor of arrayadapter?

2- kind of anonymous class structure?

3- in reality custom adapter object type of resolveinfo?

any appreciated. thanks

1. getview(int position, view convertview, viewgroup parent) called within brackets because constructing new array adapter, , therefore must provide required methods adapter.

2. yes is

3. yes, creating customized arrayadapter arrays of object resolveinfo,

i assume have extended arrayadapter class implementing own java class file, doing same thing. benefit implementing own java class file thatyou can use same arrayadapter anywhere in project. however, if place need adapter, may better implement way.