android - SwipeRefreshLayout works but the spinner won't show -

i'm having issue using swiperefreshlayout, functionality works spinner won't show. i've used provided solutions out there still nothing.

i don't use xml @ code , avoid it. have class extending swiperefreshlayout create listview, add adapter , configure refresh action etc. minimum api level 16.

if guys need further details or code please let me know , i'll glad provide them, appreciated!

my activity

public class mainactivity extends activity {      private static mainactivity mainactivity = null;     private mainview mainview;      @override     protected void oncreate(bundle savedinstancestate) {          super.oncreate(savedinstancestate);          mainview = new mainview(this);         setcontentview(mainview);     }      public static mainactivity getmainactivity() {         return mainactivity;     } } 

my main view:

public class mainview extends swiperefreshlayout {      private listview listview;      public mainview(context context) {         super(context);          final string [] objects = new string[] {"panda", "horse", "fox"};          listview = new listview(context);         final arrayadapter arrayadapter = new arrayadapter<string>(context, android.r.layout.simple_list_item_1, objects);         listview.setadapter(arrayadapter);         addview(listview);          this.setonrefreshlistener(new onrefreshlistener() {             @override             public void onrefresh() {                 objects[0] = "big panda!";                 arrayadapter.notifydatasetchanged();                 setrefreshing(false);             }         });     }      @override     protected void onlayout(boolean changed, int l, int t, int r, int b) {         int width = r - l;         int height = b - t;          listview.layout(0, 0, width, height);     } } 

hard tell without seeing code, gut tells me need make sure appropriate progress view linked , setting visibility visible , invisible @ right times.