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  • MIT App Inventor Built-in Blocks
    Built-in blocks are available regardless of which components are in your project In addition to these language blocks, each component in your project has its own set of blocks specific to its own events, methods, and properties This is an overview of all of the Built-In Blocks available in the Blocks Editor Control blocks Logic blocks Math blocks Text blocks Lists blocks Dictionaries blocks
  • Reference Documentation
    The MIT App Inventor reference documentation is organized into three main categories: built-in blocks reference, component reference, and other technical documentation Built-in Blocks Reference Components Reference Technical and Other Guides
  • Massachusetts Institute of Technology
    Massachusetts Institute of Technology
  • MIT App Inventor Text Blocks
    This string can contain any characters (letters, numbers, or other special characters) On App Inventor it will be considered a Text object
  • Component Reference
    This document describes the components you can use in App Inventor to build your apps Each component can have methods, events, and properties Most properties can be changed by apps — these properties have blocks you can use to get and set the values Some properties can’t be changed by apps — these only have blocks you can use to get the values, not set them Each item is annotated
  • MIT App Inventor Control Blocks
    if else if for each number from to for each item in list for each key with value in dictionary while if then else do with result evaluate but ignore result open another screen open another screen with start value get plain start text get start value close screen close screen with plain text close screen with value close application break if else if Tests a given condition If the condition
  • App Inventor Extensions
    You could use ai2 appinventor mit edu, or you could use a server you’ve built on your local machine Start a new project In the designer palette open the Extension drawer and click import extension Choose the aix file you built just above and click import AltCamera should now appear as a component in the Extension drawer
  • MIT App Inventor Dictionary Blocks
    The above example shows that in JSON the keys (quoted text before the :) can map to different types of values The allowed types are number, text, other dictionaries, booleans, and lists In the blocks language, you can bulid this dictionary as follows: Figure 1: A blocks representation of the JSON code snippet shown above create empty dictionary The create empty dictionary block creates a
  • Sensors - Massachusetts Institute of Technology
    Properties Available Returns whether the AccelerometerSensor hardware is available on the device Enabled Specifies whether the sensor should generate events If true, the sensor will generate events Otherwise, no events are generated even if the device is accelerated or shaken LegacyMode Prior to the release that added this property the AccelerometerSensor component passed through sensor
  • Building Apps with the Emulator
    App Inventor includes an emulator for the phone The emulator lets you develop and test apps using a virtual phone instead of a real phone Instead of connecting a phone to the USB port, just start the emulator program When you click Connect to Phone in the Blocks Editor, your app will appear in the emulator You can’t do everything with the emulator that you can with a real phone — you





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