Android Mod Menu JavaGui

This src can build by Aide CMODS (help me to fix this src for Android Studio if can't to build it)

Implementing the menu to the target game

1. Know your game's main activity

Now we are looking for main activity, there are 2 ways to do

1. Decompile the game's APK file. Open AndroidManifest.xml and search after <action android:name="android.intent.action.MAIN"/>.

Example the game's main activity was com.unity3d.player.UnityPlayerActivity

Be sure to enable Word wrap so it is easier to read

2. APK Easy Tool since it can read out location of main activity without decompiling APK

Note it somewhere to remember it

2. Making corresponding changes in the files

Decompile the game APK

Open the game's AndroidManifest.xml

Add the SYSTEM_ALERT_WINDOW permission besides other permissions if it doesn't exist. Doesn't matter where you place it as long as it's above the application tag

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>

If you don't add it, you can't allow overlay permission.

Add the service above the end of application tag (change the package name of your menu if you had changed it)

<service android:name="uk.lgl.modmenu.FloatingModMenuService" android:enabled="true" android:exported="false" android;process=":UnityKillsMe" android:stopWithTask="true"/>

Now we need to call your mod menu activity

There are 2 ways to call your mod menu activity. Choose one of them you like to try. Don't know? just choose METHOD 1

METHOD 1

This simple way, we will call to MainActivity.java. MainActivity.java will never be used

Locate to the game's path of main activity and open the smali file. If the game have multi dexes, it may be located in smali_classes2.. please check all

With the path of the target game’s main activity which we determined earlier com.unity3d.player.UnityPlayerActivity. Think of it like a path /com/unity3d/player/UnityPlayerActivity.smali

Open the main acitivity's smali file, search for OnCreate method and paste this code inside (change the package name if you had changed it)

invoke-static {p0}, Luk/lgl/MainActivity;->Start(Landroid/content/Context;)V

Save the file

METHOD 2

You can follow this it if the first method really fails, or if you really want to use MainActivity.java for a reason. Since this involve changing activites, it may cause some problems.

On your MainActivity.java, put the game's main activity to public String GameActivity

Uncomment this code

Toast.makeText(MainActivity.this, "Error. Game's main activity does not exist", Toast.LENGTH_LONG).show();

On AndroidManifest.xml, remove <action android:name="android.intent.action.MAIN"/> from the game's activity, like this:

If you don't remove <action android:name="android.intent.action.MAIN"/> from the game's activity, your menu will not launch. AndroidManifest.xml can ONLY contain one <action android:name="android.intent.action.MAIN"/>

near the end of application tag </application>, add your main activity above it. uk.lgl.MainActivity is your main activity

<activity android:configChanges="keyboardHidden|orientation|screenSize" android:name="uk.lgl.MainActivity">
     <intent-filter>
         <action android:name="android.intent.action.MAIN"/>
         <category android:name="android.intent.category.LAUNCHER"/>
     </intent-filter>
</activity>

Save the file

Do NOT use both methods at the same time

3. Building your project and copying files

Build the project to the APK file. Build -> Build Bundle(s)/APK(s) -> Build APK(s)

If no errors occured, you did everything right and build will succeded. You will be notified that it build successfully

Click on locate to show you the location of build.apk. It is stored at (your-project)\app\build\outputs\apk\app-debug.apk

Decompile your app-debug.apk.

Copy your mod menu from decompiled app-debug.apk smali to the game's smali folder. Example ours is uk.lgl.modmenu, we copy the uk folder from app-debug (app-debug\smali\uk) to the game's decompiled directory (game name)\smali

If the game have multidexes, just add your smali to the last smali_classes if possible to prevent compilation errors such as Unsigned short value out of range: xxxxx (Smali limit error)

Copy the library file (.so) from app-debug.apk to the target game. Watch out the folder names, we don't want to mix them up, so make sure to copy our lib file to the correct architecture. Like our armeabi-v7a lib goes to the target games armeabi-v7a folder, arm64-v8a lib goes to the arm64-v8a folder...

PUTTING THE LIB FILE ON A WRONG ARCHITECTURE LIKE PUTTING ARM64 LIB TO ARMV7 WILL RESULT A CRASH!

4. Compiling game apk

Now compile and sign the apk, and install it on your device

Congrats. You have successfully implemented a mod menu.

Tutorial with Video

This tutorial made by Gamer Aadil: https://www.youtube.com/watch?v=A701xli_LDM

Credits

• LGLTeam: https://github.com/LGLTeam/Android-Mod-Menu
• ocornut: https://github.com/ocornut/imgui
• jmpews: https://github.com/jmpews/Dobby