Android email widget not updating
See the Wiktionary sample's App Widget Provider for an example of an App Widget running a On devices running Android 8.0 (API level 26) and higher, the launchers that allow you to create pinned shortcuts also allow you to pin app widgets onto the launcher.
Similar to pinned shortcuts, these pinned widgets give users access to specific tasks in your app.
App Widgets are miniature application views that can be embedded in other applications (such as the Home screen) and receive periodic updates.
You can design your App Widget using the View objects listed below, but before you begin designing your App Widget, please read and understand the App Widget Design Guidelines.
Through it, you will receive broadcasts when the App Widget is updated, enabled, disabled and deleted.
that launches when the user adds your App Widget and allows them to modify App Widget settings at create-time.
For example, if the user adds two instances of your App Widget, this is only called the first time.
If you need to open a new database or perform other setup that only needs to occur once for all App Widget instances, then this is a good place to do it.