B4A Library SpeechRecognitionNoUI - Google Speech Recognition Without Popup

A better alternative for offline recognition is available here.

With this, you can add speech recognition feature to your application without google speech recognition popup (check attached example),

SpeechRecognitionNoUI

Author: @Biswajit
Version: 1.6

• SpeechRecognitionNoUI
  • Events:
    • ReadyForSpeech
      Called when the endpointer is ready for the user to start speaking.
    • BeginningOfSpeech
      The user has started to speak.
    • EndOfSpeech
      The user stops speaking.
    • Error (Msg As String)
      A network or recognition error occurred.
    • PartialResults (Texts As List)
      Partial recognition results are available.
    • Results (Texts As List)
      Recognition results are ready.
    • RmsChanged (RmsValue As Int)
      The sound level in the audio stream has changed. There is no guarantee that this method will be called.
    • BufferReceived(buffer() As Byte)
      The purpose of this function is to allow giving feedback to the user regarding the captured audio. There is no guarantee that this method will be called.
  • Functions:
    • NoRecognizerBeep As Boolean
      Set true if you dont want beep sound before and after speech recognition.
      Starting from Android 7+ this method will throw an exception if the user set the Do Not Disturb mode,
      unless your app has requested a special permission with NOTIFICATION_POLICY_ACCESS_SETTINGS.
      (Check example)
    • Initialize (eventname As String, callback As Object) As Boolean
    • IsInitialized As Boolean
    • IsRecognitionAvailable As Boolean
      Check if Speech Recognition is available or not
    • StartListening (LANGUAGE As String, PARTIAL_RESULTS As Boolean, PREFER_OFFLINE As Boolean) As String
      Start listening.
      LANGUAGE : Recognition language. IETF language tag (as defined by BCP 47), for example "en-US"
      PARTIAL_RESULTS : indicate whether partial results should be returned by the recognizer as the user speaks.
      PREFER_OFFLINE : indicate whether to only use an offline speech recognition engine. If false then either network or offline recognition engines may be used
    • StopListening As String

Here is the original thread. I took some ideas and codes to build this library.

Note: Remember to INTERNET, RECORD_AUDIO and NOTIFICATION_POLICY_ACCESS_SETTINGS permission.
For SDK v30: Add this following code to your project manifest.

AddManifestText(
<queries>
    <intent>
        <action android:name="android.speech.RecognitionService" />
    </intent>
</queries>)

Update 1.1: Added NoRecognizerBeep option. Set true if you don't want beep sound before and after speech recognition.
Update 1.2:

1. Added ReadyForSpeech event.
2. Fixed recognition language problem

Update 1.3: Fixed crashing issue in DND mode.
Update 1.4: Added proper error handling and warning message for DND mode. (Check the example)
Update 1.5: Added BufferReceived event.
Update 1.6: Fixed an issue with the offline voice recognition.

 

[msmerce]

Thank you for your quick response. I've already read the Android documentation for "RecognitionListener". By the way, "onRmsChanged" also reads "There is no guarantee ...". Nevertheless the event is triggered. Probably this sentence only means that the event is not triggered on all devices. Is the event just not fired on your device, or is there an error when adding the event? Would it be possible to add the event so that everyone can try it for themselves?

 

[Biswajit]

Thank you for your quick response. I've already read the Android documentation for "RecognitionListener". By the way, "onRmsChanged" also reads "There is no guarantee ...". Nevertheless the event is triggered. Probably this sentence only means that the event is not triggered on all devices. Is the event just not fired on your device, or is there an error when adding the event? Would it be possible to add the event so that everyone can try it for themselves?

Update 1.5: Added BufferReceived event.

 

[sn_nn]

Hi, Biswajit! Very nice library, but it working online only. Then i try work offline, i'm receiving message: "Network error". (Android 7.0). Is it possible work offline?

 

[Biswajit]

Hi, Biswajit! Very nice library, but it working online only. Then i try work offline, i'm receiving message: "Network error". (Android 7.0). Is it possible work offline?

Don't know. I haven't faced this before. But as per stackoverflow if you are using a samsung device then change the speech API in the phone settings.
Also check if your device has the language (which you are using in your code) pack installed or not.

 

[sn_nn]

Don't know. I haven't faced this before. But as per stackoverflow if you are using a samsung device then change the speech API in the phone settings.
Also check if your device has the language (which you are using in your code) pack installed or not.

Oukitel 10000K pro (Android 7.0), offline voice recognising is working with XSpeechRecogniser...
Configuration ia enabling offline recognising too.

 

[Biswajit]

Oukitel 10000K pro (Android 7.0), offline voice recognising is working with XSpeechRecogniser...
Configuration ia enabling offline recognising too.

Could you post your code, how you are calling the StartListening method?

 

[sn_nn]

Could you post your code, how you are calling the StartListening method?

Was used Your example and Library (ver.1.5.)
I think, it may be the problem of Chinees phone...

 

[pas]

When using the sample code, it does not work when the the device is offline (WiFi disabled). Could somebody please describe any steps needed for this to work? Note the device being tested is running Android 9 and has the offline speech recognition files loaded and enabled via settings. Thank you.

 

[qqqqw]

need Google services？ Thank you.

 

[Biswajit]

need Google services？ Thank you.

Yes

 

[kalikamtest]

Hi friends, I did everything right, but what is the reason for this error?
test on xiaomi redmi 6 android 9 & Huawei y6
==================
Logger connected to: Xiaomi Redmi 6
--------- beginning of main
Copying updated assets files (1)
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
java.lang.NoClassDefFoundError: Failed resolution of: Landroidx/core/content/ContextCompat;
at anywheresoftware.b4a.objects.RuntimePermissions.Check(RuntimePermissions.java:73)
at anywheresoftware.b4a.objects.RuntimePermissions.CheckAndRequest(RuntimePermissions.java:97)
at ir.yahoo98.brandsum.main._activity_resume(main.java:461)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:348)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:144)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:193)
at ir.yahoo98.brandsum.main.afterFirstLayout(main.java:111)
at ir.yahoo98.brandsum.main.access$000(main.java:17)
at ir.yahoo98.brandsum.main$WaitForLayout.run(main.java:83)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:201)
at android.app.ActivityThread.main(ActivityThread.java:6820)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:922)
Caused by: java.lang.ClassNotFoundException: Didn't find class "androidx.core.content.ContextCompat" on path: DexPathList[[zip file "/data/app/ir.yahoo98.brandsum-JvTw7EfiUeeFKtvkPcgchA==/base.apk"],nativeLibraryDirectories=[/data/app/ir.yahoo98.brandsum-JvTw7EfiUeeFKtvkPcgchA==/lib/arm, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:171)
at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
... 20 more

 

[Erel]

1. Add this line:

#AdditionalJar: com.android.support:support-compat

2. If it doesn't help then your SDK is not configured properly. Follow the installation instructions: https://www.b4x.com/b4a.html

 

[PodSoft2016]

Hi, Google Speech limition Time is 60 seconds, but this library limition is 2. is any solution for it?

 

[Biswajit]

Hi, Google Speech limition Time is 60 seconds, but this library limition is 2. is any solution for it?

There is no limitation added externally to the library its a bridge between b4a to native android. Its based on the android SpeechRecognizer.
There is no option to extend the time limitation. If it detects silence for 2-3 sec then it will stop.

Google Speech limition Time is 60 seconds

Where did get this information?

 

[PodSoft2016]

thanks for reply. you mean delay is 3 seconds .but in this page says that is 60 seconds. plz see
Google's Speech Recognition API Usage Limits - Stack Overflow
because if was so short, its very less time to receive voice from user, its so bad

 

[PodSoft2016]

Sorry sir. i checked again and saw in silent mode limit time for disconnection is 6 seconds. its sufficient time for speaking,but 2 is less. as this code

 

[PodSoft2016]

im so sorry sir. i checked language fa is 2 seconds and other language is 6 seconds. its strange but real. Tnx For your good library

 

[Biswajit]

There is nothing I can do with the timing. Everything is happening in the system. The library is just invoking the process without the popup.

 

[Biswajit]

thanks for reply. you mean delay is 3 seconds .but in this page says that is 60 seconds. plz see
Google's Speech Recognition API Usage Limits - Stack Overflow
because if was so short, its very less time to receive voice from user, its so bad

This answer is from 2014. A lot of things have been changes in the past few years.

 

[PodSoft2016]

Thanks a lot Biswajit .