Exception : Only the original thread that created a view hierarchy can touch its view

[Djembefola]

When i run my app in debug mode, the log file sometimes shows this error message:

Exception : Only the original thread that created a view hierarchy can touch its views.

Meanwhile, the IDE shows a different error message ("Index out ouf bounds"), but no hint, which of the 5000 lines could have caused the error.


This only happens in debug mode, everything is fine when i compile/run in release mode.

I use a separate thread for recording audio in my app.
During recording the microphone level is displayed and frequently updated. The procedure is called with

RecordingThread.RunOnGuiThread( "ShowVolume", Array As Object(CurrentVolume))

Maybe this line is related to the exeption error message.

Can i ignore the exception, because it is only thrown in Debug Mode? Is there a way to get rid of it?

 

[Erel]

You should not step into code executed by other threads with the debugger. The debugger will not handle this correctly. Why do you need another thread?

 

[Djembefola]

You should not step into code executed by other threads with the debugger.

Does this mean, i should never run the app in debug mode (with or without setting breakpoints), when a separate thread is involved?
I ask this, because there were no breakpoints when the exception happened.

Why do you need another thread?

i need a separate recording thread for the audio record object, because reading the bytes from the hardware into the recording buffer in a loop is blocking and time-critical.

 

[Erel]

You can run in debug mode, but you shouldn't break in other threads code. It might be easier to run in release mode.

A better implementation of this library would have been to manage the background thread inside the library (as done in all the official libraries).