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	2590	January 16, 2024
🏃‍♂️ Fast : An Efficient Way to Build & Publish Extensions Extension Development extension-developmen , fast-cli , extension-builder	477	14122	September 16, 2025
Extension properties bug Open Source Development	6	74	September 14, 2025
Extension property "Screen" Extension Development faq	2	90	September 11, 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	3	132	September 8, 2025
Rush • A new and improved way of building extensions Extension Development extension-developmen , extension-builder	558	44656	September 7, 2025
A lot of warnings when compiling an extension Extension Development bug-or-problem	2	85	September 6, 2025
Looking for help in extension development Extension Development	6	190	September 1, 2025
The Mist Project: AI and Syntax Integration for App Inventor Open Source Development	22	1205	August 26, 2025
[F/OS] OneSignalPush Extension but not Succeed build till now (v1) Extension Development	8	292	August 26, 2025
Android 15+ : Status and Nav Bar Colours Extension Development	43	2352	August 24, 2025
AI2OfflineBuildTool : Build AI2 Projects Offline Open Source Development ai2offline , build-tool	2	204	August 23, 2025
Error when building the application Open Source Development	6	193	August 16, 2025
Getting blank page on local host Open Source Development localhost	16	254	August 15, 2025
Creating own extension Extension Development	4	6367	August 8, 2025
Error building aix using rush Extension Development aix-builder	1	117	July 25, 2025
Need help for recyclerview library Extension Development	52	1419	July 17, 2025
Getting "invoke: no method named StartAdMob in class java.lang.Boolean" in Custom AdMob Extension Extension Development monetization	6	181	July 21, 2025
Extension Document Generator - Generate Docs For Your Extension In A Single Click Extension Development extensions , extension , extension-docs	51	1756	July 12, 2025
Super Dev Mode pauses on “invisible” breakpoints & then shows blank screen Open Source Development	6	175	July 11, 2025
How do you use attach XML feature(@usesXML) in extensions? Extension Development	2	161	July 3, 2025
Need Help Making App Inventor UI Truly Responsive for Mobile Open Source Development gsoc	4	222	July 2, 2025
Add deep link support in app Extension Development	77	10968	June 27, 2025
AIX Extensions Catalog: The Open-Source Hub for App Inventor Extensions Extension Development	10	703	June 26, 2025
A Problem about Cyber Security Attack Vendor for Extensions Extension Development extensions	1	170	June 25, 2025
Code too large after adding componants Open Source Development bug-or-problem	6	237	June 25, 2025
Error: Property AccelerometerSensor.LegacyMode has no category Open Source Development bug-or-problem	4	127	June 14, 2025
Accessing AppInventor on localhost Open Source Development	3	219	June 14, 2025
Windows testing of SDK 35 changes Open Source Development	0	281	June 13, 2025
Free AdMob ads extension source code for extension developers Extension Development monetization	5	4672	June 13, 2025