Open Source Development

Extension Development This category is for questions specifically about working with MIT App Inventor's open source repository as it pertains to extension development. Anyone interested in developing an extension should start by reviewing the following documents and ask questions here if you encounter issues. Also check the parent category #open-source-development for additional troubleshooting when it comes to building the master or ucr branches. Google Summer of Code Please post your inquiries and discussions about MIT App Inventor Google Summer of Code submissions here.

Topic	Replies	Views	Activity
About the Open Source Development category Open Source Development	5	2571	January 16, 2024
Looking for help in extension development Extension Development	6	101	September 1, 2025
The Mist Project: AI and Syntax Integration for App Inventor Open Source Development	22	1111	August 26, 2025
[F/OS] OneSignalPush Extension but not Succeed build till now (v1) Extension Development	8	163	August 26, 2025
🏃‍♂️ Fast : An Efficient Way to Build & Publish Extensions Extension Development extension-developmen , fast-cli , extension-builder	469	13043	August 25, 2025
Android 15+ : Status and Nav Bar Colours Extension Development	43	1146	August 24, 2025
AI2OfflineBuildTool : Build AI2 Projects Offline Open Source Development ai2offline , build-tool	2	157	August 23, 2025
Error when building the application Open Source Development	6	167	August 16, 2025
Getting blank page on local host Open Source Development localhost	16	204	August 15, 2025
Creating own extension Extension Development	4	6283	August 8, 2025
Error building aix using rush Extension Development aix-builder	1	97	July 25, 2025
Need help for recyclerview library Extension Development	52	1319	July 17, 2025
Getting "invoke: no method named StartAdMob in class java.lang.Boolean" in Custom AdMob Extension Extension Development monetization	6	156	July 21, 2025
Extension Document Generator - Generate Docs For Your Extension In A Single Click Extension Development extensions , extension , extension-docs	51	1673	July 12, 2025
Super Dev Mode pauses on “invisible” breakpoints & then shows blank screen Open Source Development	6	158	July 11, 2025
How do you use attach XML feature(@usesXML) in extensions? Extension Development	2	137	July 3, 2025
Need Help Making App Inventor UI Truly Responsive for Mobile Open Source Development gsoc	4	201	July 2, 2025
Add deep link support in app Extension Development	77	10829	June 27, 2025
After Commit 0048cfa, the locally compiled version is blank after logging in, and some js have 404 errors Open Source Development bug-or-problem	1	95	June 27, 2025
AIX Extensions Catalog: The Open-Source Hub for App Inventor Extensions Extension Development	10	643	June 26, 2025
A Problem about Cyber Security Attack Vendor for Extensions Extension Development extensions	1	143	June 25, 2025
Code too large after adding componants Open Source Development bug-or-problem	6	222	June 25, 2025
Error: Property AccelerometerSensor.LegacyMode has no category Open Source Development bug-or-problem	4	115	June 14, 2025
Accessing AppInventor on localhost Open Source Development	3	191	June 14, 2025
Windows testing of SDK 35 changes Open Source Development	0	257	June 13, 2025
Free AdMob ads extension source code for extension developers Extension Development monetization	5	4618	June 13, 2025
OneSignal Extension Fails in MIT App Inventor with NoClassDefFoundError — Works in Other Builders Extension Development help	15	237	June 12, 2025
Request for Feedback : Property Editor for creating ML models Google Summer of Code	1	156	June 7, 2025
Feedback Requested: Layout Mockups for App Inventor Mobile UI Open Source Development	5	344	June 1, 2025
How to set custom icon for extension Logo Extension Development iconname	73	4627	May 31, 2025