Setting up a virtual device (Emulator) & Owned device for app testing
In Android Studio, Navigate to Tools > AVD Manager
Click "Create Virtual Device" (bottom left)
Choose a device your want to emulate such as: Pixel 3 and click next
in System Image dialog in the recommended tab choose the latest release
Click Download next to the android version you choose
Accept the default settings click finish and your ready to start.
Select Run > Run 'app' or click the green arrow icon next to your selected device name in the top right corner, use the red square to stop the application from its running state.
You should now see your new mobile emulator displaying your app
This should be how your Newley created app should look
Android Studio Status Bar Messages:
Gradle build running
Waiting for target device to come online
Run your app on your own device
Enable USB Debugging on your device
Open your device settings > About phone > tap Build Number seven times
Go back to settings & Developer options should appear at the bottom of the list click Developer Options
Click "Enable USB Debugging"
Connect your phone to your computer via USB or USB-C cable
Once you connect your device you should see a pop up message asking to agree to allow USB Debugging click allow
In Android Studio Click Run Select your personal device as the Deployment Target and click OK your app should now run on your device.