android - Call widget's onUpdate method from the app's main activity -

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i'm working on android application includes widget. main interface of app simple activity, of things users can in activity make necessary update widget - i.e. run onupdate method.

how can trigger method activity? looking @ other questions, i've been able write code changes layout, doesn't seem run onupdate (since i'm left empty layout , none of data added during onupdate).

any ideas or code samples appreciated!

i still pretty new android, accomplished 3 steps:

first, put contents of appwidgetprovider.onupdate in method (myupdate(context)).

second, overrode appwidgetprovider.onreceive() this:

public void onreceive(final context context, final intent intent) {     super.onreceive(context, intent);      if (my_public_static_string.equals(intent.getaction()))     {         myupdate(context);     } }

third, other activity, send generic broadcast action set on intent. 

intent updatewidgetintent = new intent(context, mywidget.class); updatewidgetintent.setaction(mywidget.my_public_static_string); context.sendbroadcast(updatewidgetintent);

this have down side of having find appwidgetmanager context , app widget ids, instead of nice interface onupdate gives you. skeptical right approach. best of luck.

myupdate(context) starts this:

appwidgetmanager appwidgetmanager = appwidgetmanager.getinstance(context); int[] appwidgetids =     appwidgetmanager.getappwidgetids(new componentname(context, this.getclass()));

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