diff --git a/navlib/src/main/java/pl/szczodrzynski/navlib/SystemBarsUtil.kt b/navlib/src/main/java/pl/szczodrzynski/navlib/SystemBarsUtil.kt
index 5867c8a..1a0cc7b 100644
--- a/navlib/src/main/java/pl/szczodrzynski/navlib/SystemBarsUtil.kt
+++ b/navlib/src/main/java/pl/szczodrzynski/navlib/SystemBarsUtil.kt
@@ -7,13 +7,16 @@ import android.graphics.Color
 import android.os.Build.VERSION.SDK_INT
 import android.os.Build.VERSION_CODES.*
 import android.util.Log
-import android.view.*
+import android.view.View
 import android.view.View.*
+import android.view.Window
+import android.view.WindowManager
 import androidx.core.graphics.ColorUtils
 import androidx.core.view.ViewCompat
 import com.mikepenz.materialize.util.KeyboardUtil
 
-class SystemBarsUtil(val activity: Activity) {
+
+class SystemBarsUtil(private val activity: Activity) {
     companion object {
         private const val COLOR_TRANSPARENT = Color.TRANSPARENT
         /**
@@ -310,9 +313,7 @@ class SystemBarsUtil(val activity: Activity) {
 
 
                     var navigationBarSize = 0
-                    val hasMenuKey = ViewConfiguration.get(activity).hasPermanentMenuKey()
-                    val hasBackKey = KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_BACK)
-                    if (!hasMenuKey && !hasBackKey && targetAppFullscreen) {
+                    if (hasNavigationBar(resources) && targetAppFullscreen) {
                         val orientation = resources.configuration.orientation
 
                         val navigationBarRes = when {
diff --git a/navlib/src/main/java/pl/szczodrzynski/navlib/Utils.kt b/navlib/src/main/java/pl/szczodrzynski/navlib/Utils.kt
index 1767a69..40f7223 100644
--- a/navlib/src/main/java/pl/szczodrzynski/navlib/Utils.kt
+++ b/navlib/src/main/java/pl/szczodrzynski/navlib/Utils.kt
@@ -3,13 +3,17 @@ package pl.szczodrzynski.navlib
 import android.app.Activity
 import android.content.Context
 import android.content.res.Configuration
-import android.graphics.Color
+import android.content.res.Resources
+import android.graphics.drawable.Drawable
 import android.os.Build
 import android.util.TypedValue
 import android.view.View
 import androidx.annotation.AttrRes
-import androidx.annotation.ColorInt
-import androidx.core.graphics.ColorUtils
+import androidx.annotation.DrawableRes
+import com.google.android.material.elevation.ElevationOverlayProvider
+import com.mikepenz.iconics.IconicsColor
+import com.mikepenz.iconics.IconicsDrawable
+
 
 /*private val displayMetrics by lazy {
     context.resources.displayMetrics
@@ -76,6 +80,37 @@ fun blendColors(background: Int, foreground: Int): Int {
     return (0xff000000 or (red.toLong() shl 16) or (green.toLong() shl 8) or (blue.toLong())).toInt()
 }
 
+fun elevateSurface(context: Context, dp: Int): Int {
+    ElevationOverlayProvider(context).apply {
+        return compositeOverlay(themeSurfaceColor, dp * context.resources.displayMetrics.density)
+    }
+}
+
 fun isTablet(c: Context): Boolean {
     return (c.resources.configuration.screenLayout and Configuration.SCREENLAYOUT_SIZE_MASK) >= Configuration.SCREENLAYOUT_SIZE_LARGE
+}
+
+fun hasNavigationBar(resources: Resources): Boolean {
+    val id = resources.getIdentifier("config_showNavigationBar", "bool", "android")
+    var hasNavigationBar = id > 0 && resources.getBoolean(id)
+
+    // Allow a system property to override this. Used by the emulator.
+    // See also hasNavigationBar().
+    val navBarOverride = System.getProperty("qemu.hw.mainkeys")
+    if (navBarOverride == "1")
+        hasNavigationBar = true
+    else if (navBarOverride == "0") hasNavigationBar = false
+
+    return hasNavigationBar
+}
+
+fun IconicsDrawable.colorAttr(context: Context, @AttrRes attrRes: Int) = color(IconicsColor.colorInt(getColorFromAttr(context, attrRes)))
+
+fun Context.getDrawableFromRes(@DrawableRes id: Int): Drawable {
+    return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+        resources.getDrawable(id, theme)
+    }
+    else {
+        resources.getDrawable(id)
+    }
 }
\ No newline at end of file