Android语音识别权限不足（错误代码9）

我正在尝试在没有标准对话框的情况下实现语音识别（该对话框可以正常工作）。

尝试开始收听时，我收到错误代码9。

我的设备是LG G Stylo（运行Android 6.0）。

显现：

<manifest package="example.com.myapplication"
      xmlns:android="http://schemas.android.com/apk/res/android">
<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<application
 .....

（也尝试添加INTERNET权限，即使这不是必需的，因为脱机识别也可以工作）

build.gradle：

compileSdkVersion 23
buildToolsVersion "23.0.2"

defaultConfig {
    applicationId "example.com.appname"
    minSdkVersion 19
    targetSdkVersion 23
    versionCode 1
    versionName "1.0"
}

语音识别代码：

private SpeechRecognizer speechRecognizer;

protected void onCreate(Bundle savedInstanceState) {
  speechRecognizer = SpeechRecognizer.createSpeechRecognizer(this);
  speechRecognizer.setRecognitionListener(new speech_listener());
  Intent intent = new intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
  intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
     RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
  intent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE,
       getApplication().getPackageName());
  intent.putExtra(RecognizerIntent.EXTRA_MAX_RESULTS, 1);
  intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, Locale.ENGLISH);
  speechRecognizer.startListening(intent);

侦听器（内部）类：

class speech_listener implements RecognitionListener
{
  public void onReadyForSpeech(Bundle params){}
  public void onBeginningOfSpeech(){}
  public void onRmsChanged(float rmsdB){}
  public void onBufferReceived(byte[] buffer){}
  public void onEndOfSpeech(){}
  public void onError(int error){
    Log.d("Speech", "error: " + error);
  }
  public void onResults(Bundle results)
  {
    ArrayList data = results.getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION);
    String answer = (String)data.get(0);
    processAnswer(answer);
  }
  public void onPartialResults(Bundle partialResults){}
  public void onEvent(int eventType, Bundle params){}
}

任何见识将不胜感激。