Widget update via remoteview Android -

i want activity "but1" update text on widget button through button in but1 activity. i've tried , shows no error still widget doesn't updates. im missing in manifest file?moreover log cat doesnt show problem following code in but1.class

et1.setonclicklistener(new onclicklistener() {      intent in=new intent();              bundle extras=in.getextras();               if(extras!=null)             {                 awid=extras.getint(appwidgetmanager.extra_appwidget_id,appwidgetmanager.invalid_appwidget_id);             }                 aw=appwidgetmanager.getinstance(context);                 @override                 public void onclick(view arg0) {                     // todo auto-generated method stub                        remoteviews rv=new remoteviews(context.getpackagename(),r.layout.activity_main);                     rv.settextviewtext(r.id.button1, "mughazf,f,jvnl");                     aw.updateappwidget(awid, rv);                     intent result=new intent();                     result.putextra(appwidgetmanager.extra_appwidget_id, awid);                     setresult(result_ok,r  esult); 

and widget is:

@override     public void onupdate(context context, appwidgetmanager appwidgetmanager,             int[] appwidgetids) {         // todo auto-generated method stub         super.onupdate(context, appwidgetmanager, appwidgetids);          final int n = appwidgetids.length;          (int i=0; i<n; i++) {             int appwidgetid = appwidgetids[i];   intent intent = new intent(context, but1.class);             pendingintent pendingintent = pendingintent.getactivity(context, 0, intent, 0);              remoteviews views = new remoteviews(context.getpackagename(), r.layout.activity_main);             views.setonclickpendingintent(r.id.button2, pendingintent);   appwidgetmanager.updateappwidget(appwidgetid, views);           }     }  } 

problem should widget app id . need keep remembering widget id update later.

your widget provider onupdate() method should store widget id in shared preference or database

i using shared preference here,

 sharedpreferences prefs = context.getsharedpreferences("private preference", context.mode_private);  // here saving 1 widget id. change logic store widget id's  prefs.edit().putint("widgetid",appwidgetid).commit(); 

then when activity launched , button clicked. can update widget layout this

first read widget id shared preference

 sharedpreferences prefs = getsharedpreferences("private preference", context.mode_private);  int awid = prefs.getint("widgetid", appwidgetmanager.invalid_appwidget_id); 

then, create instance of remoteview , set new text textview

 remoteviews rv=new remoteviews(getpackagename(),r.layout.widget_layout);  rv.settextviewtext(r.id.textview1, "some 1 updated me"); 

then , instance of appwidget manager

  appwidgetmanager appwidgetmanager = appwidgetmanager.getinstance(getapplicationcontext()); 

and, update widget new remoteview layout.

  appwidgetmanager.updateappwidget(awid, rv); 

so, awid - widget id got onupdate method.

this should work. let me know if see issue.