Just black is pro

app/src/main/java/code/name/monkey/retromusic/fragments/settings/MainSettingsFragment.kt

@@ -63,7 +63,7 @@ class MainSettingsFragment : Fragment(), View.OnClickListener {
         aboutSettings.setOnClickListener(this)
 
         buyProContainer.apply {
-            if (App.isProVersion()) show() else hide()
+            if (!App.isProVersion()) show() else hide()
             setOnClickListener {
                 NavigationUtil.goToProVersion(requireContext())
             }
@@ -75,6 +75,7 @@ class MainSettingsFragment : Fragment(), View.OnClickListener {
             buyPremium.setTextColor(it)
             diamondIcon.imageTintList = ColorStateList.valueOf(it)
         }
+
     }
 
     private fun inflateFragment(fragment: Fragment, @StringRes title: Int) {

app/src/main/java/code/name/monkey/retromusic/fragments/settings/ThemeSettingsFragment.kt

@@ -25,6 +25,7 @@ import code.name.monkey.appthemehelper.common.prefs.supportv7.ATEColorPreference
 import code.name.monkey.appthemehelper.common.prefs.supportv7.ATESwitchPreference
 import code.name.monkey.appthemehelper.util.ColorUtil
 import code.name.monkey.appthemehelper.util.VersionUtils
+import code.name.monkey.retromusic.App
 import code.name.monkey.retromusic.R
 import code.name.monkey.retromusic.appshortcuts.DynamicShortcutManager
 import code.name.monkey.retromusic.util.PreferenceUtil
@@ -77,6 +78,10 @@ class ThemeSettingsFragment : AbsSettingsFragment() {
         }
         val blackTheme: ATESwitchPreference? = findPreference("black_theme")
         blackTheme?.setOnPreferenceChangeListener { _, _ ->
+            if (!App.isProVersion()) {
+                showProToastAndNavigate("Just Black theme")
+                return@setOnPreferenceChangeListener false
+            }
             ThemeStore.markChanged(requireContext())
             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N_MR1) {
                 requireActivity().setTheme(PreferenceUtil.getThemeResFromPrefValue("black"))

app/src/main/res/drawable/ic_invert_colors_white_24dp.xml

@@ -0,0 +1,19 @@
+<!--
+  ~ Copyright (c) 2019 Hemanth Savarala.
+  ~
+  ~ Licensed under the GNU General Public License v3
+  ~
+  ~ This is free software: you can redistribute it and/or modify it under
+  ~ the terms of the GNU General Public License as published by
+  ~  the Free Software Foundation either version 3 of the License, or (at your option) any later version.
+  ~
+  ~ This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+  ~ without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  ~ See the GNU General Public License for more details.
+  -->
+
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24.0" android:viewportWidth="24.0"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M17.66,7.93L12,2.27 6.34,7.93c-3.12,3.12 -3.12,8.19 0,11.31C7.9,20.8 9.95,21.58 12,21.58c2.05,0 4.1,-0.78 5.66,-2.34 3.12,-3.12 3.12,-8.19 0,-11.31zM12,19.59c-1.6,0 -3.11,-0.62 -4.24,-1.76C6.62,16.69 6,15.19 6,13.59s0.62,-3.11 1.76,-4.24L12,5.1v14.49z"/>
+</vector>

app/src/main/res/layout/activity_pro_version.xml

@@ -73,6 +73,26 @@
                         android:gravity="center_vertical"
                         android:orientation="horizontal">
 
+                        <androidx.appcompat.widget.AppCompatImageView
+                            android:layout_width="wrap_content"
+                            android:layout_height="wrap_content"
+                            android:padding="16dp"
+                            app:srcCompat="@drawable/ic_invert_colors_white_24dp"
+                            app:tint="?colorOnSurface" />
+
+                        <com.google.android.material.textview.MaterialTextView
+                            android:layout_width="match_parent"
+                            android:layout_height="wrap_content"
+                            android:padding="16dp"
+                            android:text="@string/black_theme_name"
+                            android:textAppearance="@style/TextViewSubtitle1" />
+                    </LinearLayout>
+
+                    <LinearLayout
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:gravity="center_vertical"
+                        android:orientation="horizontal">
 
                         <androidx.appcompat.widget.AppCompatImageView
                             android:layout_width="wrap_content"