Android Question Audio recording problem with the samples

JukkaHo · Apr 20, 2019

Audio recording steamer or to a wave file
I get this error with both versions:

java.lang.IllegalStateException: startRecording() called on an uninitialized AudioRecord.
at android.media.AudioRecord.startRecording(AudioRecord.java:1013)
at anywheresoftware.b4a.audio.AudioStreamer.StartRecording(AudioStreamer.java:98)

The manifest is:

AddManifestText(
<uses-sdk android:minSdkVersion="4" android:targetSdkVersion="26"/>
<supports-screens android:largeScreens="true"
android:normalScreens="true"
android:smallScreens="true"
android:anyDensity="true"/>)
SetApplicationAttribute(android:icon, "@drawable/icon")
SetApplicationAttribute(android:label, "$LABEL$")
'End of default text.

Test device is Huawei P Smart

thanks
JukkaHo

JohnC · Apr 20, 2019

That manifest code should not be causing the problem.

Download Erel's example in post #10 on this page and you'll see that his sample works, then see what you are not doing in your code:

https://www.b4x.com/android/forum/threads/audio-library-v1-5-new-audiostreamer-object.30550/

JukkaHo · Apr 20, 2019

Thanks, JohnCody. I'll try with that...

Addo · Apr 21, 2019

Look at the logging list of permissions button, then use runtime permission to allow the dangerous permissions on Android 6+

Look at this thread
www.b4x.com/android/forum/threads/runtime-permissions-android-6-0-permissions.67689

JukkaHo · Apr 22, 2019

Thanks PassionDEV,

As you correctly guessed, the actual problem was with permissions.

This helped:

If FirstTime Then
rp.CheckAndRequest(rp.PERMISSION_WRITE_EXTERNAL_STORAGE)
Wait For Activity_PermissionResult (Permission As String, Result As Boolean)
If Result<>True Then
ExitApplication
End If
rp.CheckAndRequest(rp.PERMISSION_RECORD_AUDIO)
Wait For Activity_PermissionResult (Permission As String, Result As Boolean)
If Result<>True Then
ExitApplication
End If
…

So these work fine.

Erel · Apr 23, 2019

A bit more elegant way to request multiple permissions: https://www.b4x.com/android/forum/threads/handle-multiple-permission-request.94611/#post-598788

JukkaHo · Apr 23, 2019

Thank you, Erel

That is neat coding.

I have been using Basic languages long time, some say too long time since QuickBASIC and later other even
Visual Basic For DOS and latest .NET versions and around 2000 some Basic for Palm devices
but B4A has been the most beautiful one.
It has it's specific approach to coding but very easy to adopt. It is also powerful and easy to extend with Javaobjects and Java parts.
And you can use your code in other environments easily.
Logging and B4A Bridge are very useful and nice testing tools.
The pearl is support which is top of tops with this community!

thank you
JukkaHo

Android Question Audio recording problem with the samples

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