How can app get the mode of the navigation bar

Question

It means, how the app get the navigation bar mode in which of the following 3 modes

• gesture navigation

• 3-button navigation

• 2-button navigation

Answer 1

You can use the below code , may not work on all android devices

public static int isEdgeToEdgeEnabled(Context context) {
        Resources resources = context.getResources();
        int resourceId = resources.getIdentifier("config_navBarInteractionMode", "integer", "android");
        if (resourceId > 0) {
            return resources.getInteger(resourceId);
        }
        return 0;
    }

The value that returned by isEdgeToEdgeEnabled function will follow below:

• Navigation is displaying with 3 buttons

• Navigation is displaying with 2 button(Android P navigation mode)

• Full screen gesture(Gesture on android Q)

Answer 2

import android.content.Context
import android.provider.Settings

enum class SystemNavigation {
    THREE_BUTTON,
    TWO_BUTTON,
    GESTURE;

    companion object {
        fun create(context: Context) = values().getOrNull(
            Settings.Secure.getInt(context.contentResolver, "navigation_mode", -1)
        )
    }
}

Usage

val systemNavigation = SystemNavigation.create(context)