add some customization menu items

library/src/main/kotlin/com/simplemobiletools/commons/activities/CustomizationActivity.kt

@@ -2,6 +2,8 @@ package com.simplemobiletools.commons.activities
 
 import android.graphics.drawable.GradientDrawable
 import android.os.Bundle
+import android.view.Menu
+import android.view.MenuItem
 import android.view.View
 import com.simplemobiletools.commons.R
 import com.simplemobiletools.commons.extensions.getContrastColor
@@ -23,6 +25,34 @@ class CustomizationActivity : BaseSimpleActivity() {
         customization_primary_color_holder.setOnClickListener { pickPrimaryColor() }
     }
 
+
+    override fun onCreateOptionsMenu(menu: Menu): Boolean {
+        menuInflater.inflate(R.menu.menu_customization, menu)
+        return true
+    }
+
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        return when (item.itemId) {
+            R.id.undo -> {
+                undoChanges()
+                true
+            }
+            R.id.save -> {
+                saveChanges()
+                true
+            }
+            else -> super.onOptionsItemSelected(item)
+        }
+    }
+
+    private fun saveChanges() {
+
+    }
+
+    private fun undoChanges() {
+
+    }
+
     private fun setupColorsPickers() {
         customization_text_color.setBackgroundColor(baseConfig.textColor)
         customization_primary_color.setBackgroundColor(baseConfig.primaryColor)

library/src/main/res/menu/menu_customization.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+      xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item
+        android:id="@+id/undo"
+        android:icon="@drawable/ic_cross"
+        android:title="@string/undo_changes"
+        app:showAsAction="ifRoom"/>
+    <item
+        android:id="@+id/save"
+        android:icon="@drawable/ic_check"
+        android:title="@string/save"
+        app:showAsAction="ifRoom"/>
+</menu>