Introduction

Floating mod menu for il2cpp base on ByNameModding

Getting Start

Edit and Build Android-Mod-Menu-BNM with Android Studio

1. edit app/com/android/support/Menu.kt

   const val TITLE = "Modded by (YourName)"
   const val SUB_TITLE = "whatever here"
   const val START_ICON = "data:image/png;base64,..."

2. edit app/cpp/native-lib.cpp

   // feature list
   getFeatureList() {}
   
   // value change
   valueChange() {}
   
   // hook methods
   OnLoaded() {}

3. build app-debug.apk

   Build > Generate App Bundles or APKs > Generate APKs
   

Decoding app-debug.apk with apktool

apktool d -f app-debug.apk

Decoding game.apk with apktool

apktool d -f game.apk

Copy app-debug files to game fold

cp app-debug/lib/${ARCH_ABI}/libModBNM.so game/lib/${ARCH_ABI}/libModBNM.so
cp -r app-debug/smali_classes{2,3,4,5} game/

Update game's main activity

1. find main activity in game/AndroidManifest.xml

   <activity
       android:configChanges="mcc|mnc|locale|touchscreen|keyboard|keyboardHidden|navigation|orientation|screenLayout|uiMode|screenSize|smallestScreenSize|density|layoutDirection|fontScale"
       android:exported="true" android:hardwareAccelerated="false" android:label="@string/app_name"
       android:launchMode="singleTask" android:maxAspectRatio="2.0"
       android:name="com.nutaku.unity.UnityPlayerActivity" android:resizeableActivity="false"
       android:screenOrientation="userLandscape">
       <meta-data android:name="unityplayer.UnityActivity" android:value="true" />
   </activity>

2. edit onCreate method in game/smali/com/nutaku/unity/UnityPlayerActivity.smali

   .method protected onCreate(Landroid/os/Bundle;)V
       # invoke Main.start(context)
       invoke-static {p0}, Lcom/android/support/Main;->start(Landroid/content/Context;)V
       ...
   .end method

Rebuilding game with apktool

apktool b -f game

Sign game/dist/game.apk with AndroidToolKit or apksigner

Credits

• Android-Mod-Menu Floating mod menu for il2cpp and other native android games.
• ByNameModding Modding il2cpp games by classes, methods, fields names on Android.
• Dobby a lightweight, multi-platform, multi-architecture hook framework.