Error validating application difference between validating and non validating parser
Or you can register for the event that the state of the phone changes, e.g., someone is calling.
A provider defines a structured interface to application data.
For a nice experience a modern computer is recommended, for example, a 2.6 GHz CPU with at least 8 GB of memory.
An SSD speeds up the start of the Android emulator significantly.
Also the design tools support constraint layout very well.
If you stop and AVD during startup process the AVD might get corrupted.
The first start may take long, e.g., several minutes on an older machine.
For example, a broadcast receiver can notify the user via the notification framework in Android.
A receiver can be registered to listen to system messages and intents.