App Inventor Extensions

Phone State Listener Extension

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Oct 7th, 2025: Version 1: initial version.

Description

Phone State Listener Extension to listen to phone state changes of your device. Also of course works if your app is not running and also survives a reboot of the device. The itoox-wrapper library from Kumaraswamy is used, which helps to directly invoke Itoo (if present) to call procedures from the background.
Required permissions: android.permission.READ_PHONE_STATE, android.permission.READ_CALL_LOG

Properties

Dummy property to display the action helper blocks. The action helper blocks can be used in the OnReceive event handler.

Reference screen for Itoo where the procedure 'OnReceive' exist. It is advised to set the Reference screen property before Starting the service initially. Or if no property is set, the extension will take "Screen1" as the reference by default.

OnReceive has the arguments action, number, start and end.

Methods

Ask for permissions android.permission.READ_PHONE_STATE and android.permission.READ_CALL_LOG

Returns true, if permissions have been granted, else false.

Example App "Phone State Listener Test"

In the example app the phone state listener extension stores all phone state changed events using the itoo StoreProperty method and displays the log after starting the app.

Test

Tested successfully on Samsung Galaxy A54 running on Android 15.

Download

Download TaifunPhoneStateListener extension (aix file
Download Phone State Listener Test project (aia file)
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This work by Pura Vida Apps is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License
with attribution (name=Pura Vida Apps and link to the source site) required.

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