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BluetoothMedic Crashes without Looper #980

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davidgyoung opened this issue Jun 10, 2020 · 0 comments · Fixed by #981
Closed

BluetoothMedic Crashes without Looper #980

davidgyoung opened this issue Jun 10, 2020 · 0 comments · Fixed by #981

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@davidgyoung
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davidgyoung commented Jun 10, 2020 •
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Expected behavior

No crash instantiating BluetoothMedic

Actual behavior

If you construct BluetoothMedic.getInstance(...) on a thread that does not have a looper, the call will crash with:

java.lang.RuntimeException: Can't create handler inside thread Thread[AsyncTask #4,5,main] that has not called Looper.prepare()

The call will succed on both the UI thread and a background thread so but only if the background thread has a looper.

The easiest workaround is to run this on a UI thread

Steps to reproduce this behavior

  1. Create a new thread without a looper
  2. Call the method above

Mobile device model and OS version

Pixel 3a

Android Beacon Library version

2.17
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Fix BluetoothMedic crash when started on non-looper thread. AltBeacon/android-beacon-library
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@davidgyoung