App Inventor Links

The following code snippets and examples (external links) might be helpful

General Stuff

• Why is a wait procedure generally a bad idea?
• I coded the wait() function. It doesn't work. Why?
• Please Wait method by Scott
• The model of event processing in App Inventor by Lyn
• How to access the android system log.
• Use SDK utilities with App Inventor by Tony (unfortunately tair.info has been shut down, but info still is available in archive.org)
• Naming conventions by Tony (unfortunately tair.info has been shut down, but info still is available in archive.org)
• How to use the MIT App Inventor keystore with AppToMarket: quick instructions and detailled steps
• How to make internal changes to your App Inventor Project by Ron
• How to get multitouch working for seperate components in an App Inventor project by Gareth, see also this guide by Alexandru
• Building apps with many screens by MIT
• Solution for tablets on Google Play by J Martin
• AI2 Project Merger Tool: combine two App Inventor projects into one
• How to compute the number of source lines of code or blocks used in an App Inventor 2 project by Franck

Programming logic

• How to check Internet connection by Saj
• Building math formulas in App Inventor by Scott
• A login template by eiXerITS
• How to work with Lists by Saj
• How to work with Lists and Lists of lists (pdf) by appinventor.org
• An example of a complex List of Lists
• Build your own database using list of lists by ABG
• XML and list of lists: example1 and example2
• JSON and list of lists: example1 and example2
• Easy to decode large information with JSON format by Carlos
• A general purpose JSON browser routine by ABG

Activity Starter

• How to start an App Inventor app using Tasker by Gekko
• How to get Tasker variables in App Inventor by Gekko
• App Inventor Activity Starter App with more than 100 examples of activities
• How to create wallpapers by Peep
• How to share text with Facebook using the Activity Starter by Suyatmo and Peep
• Intentsiti, a little helper app to get different phone information by Mark. Full documentation here

Screens

• How to swipe to go to another screen by Scott
• Project Merger Tool: combine two App Inventor projects into one
• How to rename a Screen using the Project Merger Tool by Juan Antonio
• File Assistant to copy and rename Screens by Tim
• PC Utility to change screen names and swap Screen1 by GeoffState
• How to copy screens by Scott and a video by Hossein
• How to pass values from one screen to another screen by Scott
• How to use tabs to simulate multiple screens by MartynC

Video Player

• How to stream a video using the videoplayer component by Hal and How to get the URL of a media stream
• How to autostart a video
• To be able to play Youtube videos in the webviewer, you have to edit the manifest and add android:targetSdkVersion="14" or higher. See this thread how to do it. Thank you Boban! See also this tutorial by Juan Antonio.

Fusiontable

• Fusiontable webviewer url solution
• A complete login example using a fusiontable as simple as possible
• How to view a map showing coordinates from a fusiontable

TinyDB

• TinyDB tutorial by Stephen
• How to store high scores with TinyDB by richard and another High Score example by ABG

The Clock

• Display a notifier "no access", but only on Thursdays and Fridays between 10am and 5pm
• The 'Do something' example
• How to get the duration between 2 instants in hours, minutes and seconds
• How to set button/label visible after certain date has passed

Other stuff

• How to get a list of the phone's contacts using a Java helper app by Ralph
• Android Development for Beginners, Youtube tutorials by Derek Banas
• How to position components on the screen video by Scott
• How to use the Slider component by Stephen
• How to append text to a file stored as asset in App Inventor
• How to keep sound playing after pressing Home button by Peep using HTML5 audio tags
• How to work with the web component and an API by Stephen
• Happy 2015 tutorial by Ghica
• Disabling the hardware menu button by Boban
• Material Theme by Boban
• Font resizing using a webviewer by Boban
• Sidebar - Side menu by Boban
• Slide menu youtube tutorial by Bo
• How to convert CR to \n by Jemand
• Listview font size workaround by Boban
• Solution for 'Webviewer giving blank page after scrolling back?' by Boban
• How to prevent in app purchases with Lucky Patcher by Conor