Hi Everyone

Hi Everyone,
I find a trip "Android Text To Speech JNI Translation" in forum. But i want to convert Speech to Text, same as "Voice Recognize" .
And then i have a few code below:

 { TForm1.TRecognitionListener }

constructor TForm1.TRecognitionListener.Create(AParent: TForm1);
begin
  inherited Create;
  FParent := AParent;
end;
procedure TForm1.ButtonInitSpeechClick(Sender: TObject);
var
  b : Boolean;

begin
  b := TJSpeechRecognizer.JavaClass.isRecognitionAvailable(SharedActivityContext);
  if b then
  begin
    SpeechRecognizer := TJSpeechRecognizer.JavaClass.createSpeechRecognizer(SharedActivityContext);
    RecListener := TRecognitionListener.Create(self);
    RecognizerIntent := TJRecognizerIntent.JavaClass.getVoiceDetailsIntent(SharedActivityContext);
    RecognizerIntent.putExtra(TJRecognizerIntent.JavaClass.EXTRA_LANGUAGE_MODEL, StringToJString('en-US'));
    SpeechRecognizer.setRecognitionListener(RecListener);
    
  end;
end;

That's all;
Plz tell me what reason?, And, how to fix it.