脱机识别不适用于ru_RU，但与en_US和de_DE兼容。 已下载所有离线字典。 那么我如何使用ru_RU！来完成这项工作？？。
小米Redmi 3s Android 6.0-API 23 google搜索最新版本
var recListener = new RecognitionListener();
recListener.BeginSpeech += RecListener_BeginSpeech;
recListener.EndSpeech += RecListener_EndSpeech;
recListener.Error += RecListener_Error;
recListener.Ready += RecListener_Ready;
recListener.Recognized += RecListener_Recognized;
Recognizer = SpeechRecognizer.CreateSpeechRecognizer(this);
Recognizer.SetRecognitionListener(recListener);
SpeechIntent = new Intent(RecognizerIntent.ActionRecognizeSpeech);
SpeechIntent.PutExtra(RecognizerIntent.ExtraLanguageModel, RecognizerIntent.LanguageModelFreeForm );
SpeechIntent.PutExtra(RecognizerIntent.ExtraCallingPackage, PackageName);
SpeechIntent.PutExtra(RecognizerIntent.ActionRecognizeSpeech,RecognizerIntent.ExtraPreferOffline );
SpeechIntent.PutExtra(RecognizerIntent.ExtraSpeechInputCompleteSilenceLengthMillis, 1500);
SpeechIntent.PutExtra(RecognizerIntent.ExtraSpeechInputPossiblyCompleteSilenceLengthMillis, 1500);
SpeechIntent.PutExtra(RecognizerIntent.ExtraSpeechInputMinimumLengthMillis, 15000);
SpeechIntent.PutExtra(RecognizerIntent.ExtraMaxResults, 1);
string str;
str = "ru_RU";
//Java.Util.Locale.Default.ToString();
SpeechIntent.PutExtra(RecognizerIntent.ExtraLanguage, str);
此代码将引发SpeechRecognizer.Error.SERVER