diff --git a/app/src/main/java/mw/gri/android/Utils.java b/app/src/main/java/mw/gri/android/Utils.java
new file mode 100644
index 0000000..2725c9d
--- /dev/null
+++ b/app/src/main/java/mw/gri/android/Utils.java
@@ -0,0 +1,75 @@
+package mw.gri.android;
+
+import android.annotation.SuppressLint;
+import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.Point;
+import android.os.Build;
+import android.view.Display;
+import android.view.WindowInsets;
+import android.view.WindowManager;
+
+public class Utils {
+
+    public static int getStatusBarHeight(Context context) {
+        WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
+        if (Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.R) {
+            return windowManager
+                    .getCurrentWindowMetrics()
+                    .getWindowInsets()
+                    .getInsets(WindowInsets.Type.navigationBars())
+                    .bottom;
+        } else {
+            Resources res = context.getResources();
+            int statusBarHeight = 24;
+            @SuppressLint({"DiscouragedApi", "InternalInsetResource"})
+            int resourceId = res.getIdentifier("status_bar_height", "dimen", "android");
+            if (resourceId > 0) {
+                statusBarHeight = res.getDimensionPixelSize(resourceId);
+            }
+            return statusBarHeight;
+        }
+    }
+
+    public static int getNavigationBarHeight(Context context) {
+        WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
+        if (Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.R) {
+            return windowManager
+                    .getCurrentWindowMetrics()
+                    .getWindowInsets()
+                    .getInsets(WindowInsets.Type.navigationBars())
+                    .bottom;
+        } else {
+            Point appUsableSize = getAppUsableScreenSize(context);
+            Point realScreenSize = getRealScreenSize(context);
+
+            // navigation bar on the side
+            if (appUsableSize.x < realScreenSize.x) {
+                return appUsableSize.y;
+            }
+
+            // navigation bar at the bottom
+            if (appUsableSize.y < realScreenSize.y) {
+                return realScreenSize.y - appUsableSize.y;
+            }
+
+            // navigation bar is not present
+            return 0;
+        }
+    }
+
+    private static Point getAppUsableScreenSize(Context context) {
+        WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
+        Point size = new Point();
+        windowManager.getDefaultDisplay().getSize(size);
+        return size;
+    }
+
+    private static Point getRealScreenSize(Context context) {
+        WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
+        Display display = windowManager.getDefaultDisplay();
+        Point size = new Point();
+        display.getRealSize(size);
+        return size;
+    }
+}