android appwidget won't update from activity

Question

I have a simple appwidget and I want to update it when an action occurs in an activity (in the same app). in onUpdate(), I immediately update the widget, which works fine. I

Answer 1

Rather than use a static method take advantage of the fact that the widget is already a broadcast receiver and register an update intent for it in your manifest. Then whenever you need to update it from the activity just call

//in your activity
sendBroadcast(new Intent(MyWidget.ACTION_UPDATE).putExtra(whatever));  



//In widget class
public static final String ACTION_UPDATE = "com.example.UPDATE_MY_WIDGET";

and inside the receiver tags of your manifest file