How do you make custom widgets?
When developing widgets for Android use, it seems that you cannot add your own custom View classes to the AppWidgetProvider.
For example, I created a custom class that extends the View, which works fine when used in an activity, but when I add it to the widget, I get a “ClassNotFoundException” because Android seems to only allow a specific set of system widgets to be added.
I’ve seen some apps look like they made their own custom widgets in them. For example, there is a radial menu that pops up when clicked showing the application shortcut. How are these achieved? Can I use my own custom widget? They seem to have a block canvas that can be drawn inside the widget.
Good quick example https://market.android.com/details?id=zombiesinthelab.widgets.droidpetwidget&feature=top-paid
So this widget is done by drawing ImageView and updating them regularly instead of using the Canvas drawing frame?
Android widgets can only contain Layout-Widgets supported by RemoteViews.
A RemoteViews object (and,
consequently, an App Widget) can
support the following layout classes:
FrameLayout LinearLayout RelativeLayout
And the following widget classes:
AnalogClock Button Chronometer ImageButton ImageView ProgressBar TextView
> Descendants of these classes are not
Pay attention to the last sentence. You cannot change this behavior, it is hardcoded in Android.