BLE problem with android 14

MIT App Inventor Help
1

I have a BLE application that works fine with android 12.
When installing it on android 14, I get an error that is similar to some other reports, but the suggested installation of a new bluetoothLE.aix version did not solve my issue.
The error :
java.lang.ExceptionInInitializerError at edu.mit.appinventor.ble.BluetoothLEint$BLEReadOperation.subscribe(BluetoothLEint.java:357) at edu.mit.appinventor.ble.BluetoothLEint$BLEReadOperation.run(BluetoothLEint.java:325) at android.os.Handler.handleCallback(Handler.java:958) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loopOnce(Looper.java:230) at android.os.Looper.loop(Looper.java:319) at android.app.ActivityThread.main(ActivityThread.java:8919) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:578) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1103) Caused by: java.lang.IllegalArgumentException: UUID string too large at java.util.UUID.fromString1(UUID.java:299) at java.util.UUID.fromStringCurrentJava(UUID.java:293) at java.util.UUID.fromString(UUID.java:262) at edu.mit.appinventor.ble.BluetoothLEGattAttributes.(BluetoothLEGattAttributes.java:33) ... 10 more
Note: You will not see another error reported for 5 seconds.

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Any suggestion ?
Thank you in advance
best regards
Ludo

2

Hi Ludo

Well, it seems you may not actually be using the latest version Extension:

Secondly, the error clearly states that your UUIDs are too long. Make your UUIDs here:

ProfessorCad: Tips & Tricks Create/Validate BLE UUIDs

3

Hi Chris,
thank you for your quick feedback.

  1. You said I am not using the latest version extension :
    I am using 2024 08 22 , and the link you gave is 2024 08 22, which is exactly the same. How did you make your conclusion that my version is not the latest ?

  2. My UUID's were made with a UUID generator, and have not changed from android 12 to android 14...why would they suddenly be too long ?
    they are all 12345678-1234-1234-1234-123456789abc long.

Best regards
Ludo

4

Hi

Well, if you read what I said, I didn't actually say that! However unless you have downloaded from the page given, you are not using the final version, which could include last-minute fixes and tweaks.

The UUIDs could become too long during the process of pasting them into App Inventor, depending on the character system of your PC - App Inventor is expecting UTF-8 or ASCII. That might be it, I don't know, but you need to replace them and you can via my website.

Edit: The UUID length may be found to be too long by the version of the Extension you are using - it may be the case that the UUIDs are not actually too long. You can test them on my website.

5

Hi Chris,
I checked the UUIDs in your link, and got :
image
they are all 12345678-1234-1234-1234-123456789abc long.

I will download the githubb version to be sure and try again.
regards
Ludo

1 Like
6

Hi Chris,
I downloaded the github version, and indeed, it now works fine for the pairing, no UUID complaints anymore....now testting the rest .
Thanks you for your help
regards
Ludo

1 Like
7

This is a change in Android 14 to have it align better with a change in Java semantics. In earlier versions of Java, the UUID constructor was a bit lax in how it parsed UUIDs and if you had extra characters at the end of a UUID it would just ignore them. Newer versions throw an error instead if the UUID doesn't conform exactly to the spec. This isn't App Inventor specific but affects the use of UUIDs in any Android code starting with Android 14.