How do you create an app widget on Android?
Defines the initial layout for the App Widget, defined in XML. Additionally, you can implement an App Widget configuration Activity. This is an optional Activity that launches when the user adds your App Widget and allows them to modify App Widget settings at create-time.
How does the app widgetprovider class work in Android?
The AppWidgetProvider class extends BroadcastReceiver as a convenience class to handle the App Widget broadcasts. The AppWidgetProvider receives only the event broadcasts that are relevant to the App Widget, such as when the App Widget is updated, deleted, enabled, and disabled.
How to determine the size of an app widget?
If the values for an App Widget’s minimum width or height don’t match the dimensions of the cells, then the App Widget dimensions round up to the nearest cell size. See the App Widget Design Guidelines for more information on sizing your App Widgets.
What’s the targetdkversion for Android app widgets?
As of Android 4.0, app widgets are automatically given padding between the widget frame and the app widget’s bounding box to provide better alignment with other widgets and icons on the user’s home screen. To take advantage of this strongly recommended behavior, set your application’s targetSdkVersion to 14 or greater.
How are widgets placed on the home screen?
The default Home screen positions App Widgets in its window based on a grid of cells that have a defined height and width. If the values for an App Widget’s minimum width or height don’t match the dimensions of the cells, then the App Widget dimensions round up to the nearest cell size.
What does widgetcategory do in Android 4.0?
Introduced in Android 4.0. The widgetCategory attribute declares whether your App Widget can be displayed on the home screen ( home_screen ), the lock screen ( keyguard ), or both. Only Android versions lower than 5.0 support lock-screen widgets. For Android 5.0 and higher, only home_screen is valid.