What is the simplest change that I can make to a new Blank Activity, as created by the latest version of Android Studio, to get the app to appear fullscreen?
I want
Update Answer I added android:windowIsTranslucent in case you have white screen in start of activity
android:windowIsTranslucent
just create new Style in values/styles.xml
from your AndroidManifest.xml add style to your activity
android:theme="@style/AppTheme"
to be like this