Changing app widget background color programmatically

Remember widget is remoteView. You have very limited resource to updates UI of widget and not directly.

You can try :

remoteViews.setInt(viewId, "setBackgroundColor", Color.BLACK);

I never used it but i guess it may be the way.

I guess you need to change color dynamically.

You can change color of ImageView image in "RemoteViews" by doing this:

remoteviews.setInt(viewid, "setColorFilter", color);