Latest Samsung's smartphone has interesting feature called full screen (or in marketing terms infinity display). In this mode app covers also part of display where home/back buttons are. Usual apps don't cover this area, leaving it black. But Samsung's native ones cover this area.
Question: how to achieve this effect? I mean what kind of manifest declaration or programmatic call (possibly Samsung's legacy API) should I use?
To enable new Samsung Galaxy S8 and LG G6 full screen support add to the AndroidManifest.xml under the <application> element:
<meta-data android:name="android.max_aspect" android:value="2.1" />
Where value of 2.1 is aspect ratio 18.5:9 (By default your App defaults to maximum ratio for 16:9 - 1.86). More info in: Android Blog.
Alternatively, you can set the following attribute for Application or Activity:
android:resizeableActivity="true"
Because the documentations states (link):
You do not need to set a maximum aspect ratio if an activity's android:resizeableActivity attribute is set to true. If your app targets API level 24 or higher, this attribute defaults to true.