Rotate ImageView in widget

问题:

I'm creating a widget where I need to rotate an ImageView. The ImageView resides insides a layout which in turn is described in a RemoteView. Is this possible? In my regular application Activity gained a reference to the ImageView using findViewById() and then calling setRotate(), but as RemoteView isn't an activity findViewById() isn't available.

I can see that it has been done before in this app: https://market.android.com/details?id=com.lanteanstudio.compass

回答1:

If you are using RemoteViews, then you cannot directly change the visible View itself, as there is no way of getting a reference to it -- a RemoteViews object generally runs in a different process (in the case of the widgets on the Homescreen this is true - the widgets run in the Homescreen process, not your own).

Instead you need to create a new RemoteViews with the image rotated - you need to rotate the bitmap before setting it to the ImageView.

Then get an instance of AppWidgetManager, and call manager.updateAppWidget(appWidgetId, remoteView).