Scriptable Apk 💯

d = u2.connect()

Apps like Tasker are scriptable APKs at heart. They provide a scripting layer (Tasker’s own language or JavaScript) to automate device actions: turning on Wi-Fi, sending SMS, responding to events. Users create scripts without ever recompiling the APK.

To understand a scriptable APK, you must first understand a standard APK. A normal APK contains classes.dex (Dalvik Executable) files—bytecode that runs on the Android Runtime (ART). To change the logic, you must decompile, edit, recompile, and re-sign the APK.

A scriptable APK contains an embedded scripting engine (interpreter). At runtime, the app loads text-based scripts from assets, storage, or a network. The engine executes these scripts, which then call down into the native Java/Kotlin code. scriptable apk

If you want to "script" the usage of an APK (e.g., auto-clicking buttons inside an app):

import uiautomator2 as u2
Create a normal Android project in Android Studio. Add the interpreter as a dependency.
Example with LuaJ and LibGDX (for games): d = u2
dependencies 
    implementation "com.badlogicgames.gdx:gdx-platform:1.12.0:natives-armeabi-v7a"
    implementation "org.luaj:luaj-jse:3.0.1" // Lua interpreter

For JavaScript (Rhino):
dependencies 
    implementation 'org.mozilla:rhino:1.7.14'

Learners write JavaScript snippets inside a sandboxed APK; the app evaluates scripts and shows output, teaching programming interactively.
Apps that teach coding (e.g., "Run Lua on Android") are scriptable APKs. The host APK provides a sandboxed environment, a file picker, and a console output view, while the user’s script provides the creativity. import uiautomator2 as u2 Create a normal Android
| Language | Interpreter for Android | Best for |
|----------|------------------------|----------|
| Lua | LuaJIT, Lua 5.3 | Games, lightweight automation |
| JavaScript | Rhino, V8 (J2V8) | Web developers, UI scripting |
| Python | Chaquopy, PyTorch Mobile, SL4A | Data processing, full scripts |
| BASIC | RFO BASIC! | Hobbyist, simple automation |
| Ruby | Ruboto (JRuby) | Ruby enthusiasts |
Recommendation for beginners: Lua via LuaJIT. It’s tiny (~200KB), fast, and easy to sandbox.