AudioFlinger不能创造纪录的轨道，状态：-1，需要帮助IFX [英] AudioFlinger could not create record track, status: -1 , Need help to ifx

问题描述

 公共类AudioRecorderActivity延伸活动{

  私有静态最终诠释RECORDER_SAMPLERATE = 8000;
  私有静态最终诠释RECORDER_CHANNELS = AudioFormat.CHANNEL_IN_MONO;
  私有静态最终诠释RECORDER_AUDIO_ENCODING = AudioFormat.ENCODING_PCM_16BIT;
  私人AudioRecord记录= NULL;
  私有静态最后字符串变量=AudioRecorderActivity;
  短[] []缓冲区=新的短[256] [160]
  INT九= 0;
  私人布尔停止= FALSE;

  私人无效的startRecording（）{

    android.os.Process.setThreadPriority（android.os.Process.THREAD_PRIORITY_URGENT_AUDIO）;
    尝试 {
      INT N = AudioRecord.getMinBufferSize（
                          RECORDER_SAMPLERATE，
                          RECORDER_CHANNELS，
                          RECORDER_AUDIO_ENCODING）* 20;

      记录=新AudioRecord（AudioSource.MIC，
                    RECORDER_SAMPLERATE，
                    RECORDER_CHANNELS，
                    RECORDER_AUDIO_ENCODING，N）;

      recorder.startRecording（）;

      而（！停）{
        短[]缓冲区=缓冲区[IX +％buffers.length]。
        N = recorder.read（缓冲液，0，buffer.length）;
      }

    }
    捕获（的Throwable X）{
      Log.v（TAG，错误读取语音音频，X）;
      x.printStackTrace（）;
    }
    最后 {
      停止= TRUE;
      STO precording（）;
    }
  }
}
 

问：虽然code段是基于计算器的的exaple，它不工作 请让我知道可能是什么错误呢？

下面是错误消息

  3月12日至二十○日：44：32.271：E / AudioRecord（224）：AudioFlinger不能创造纪录的轨道，状态：-1
三月12号至20日：44：32.271：E / AudioRecord-JNI（224）：错误创建AudioRecord实例：初始化检查失败。
三月12号至20日：44：32.271：E / AudioRecord Java的（224）：[android.media.AudioRecord]错误code初始化本地AudioRecord对象时-20。
 

解决方案

添加RECORD_AUDIO权限的Andr​​oidManifest.xml

 ＆LT;使用-权限的Andr​​oid：名称=android.permission.RECORD_AUDIO/＆GT;
 

public class AudioRecorderActivity extends Activity {

  private static final int RECORDER_SAMPLERATE        = 8000;
  private static final int RECORDER_CHANNELS          = AudioFormat.CHANNEL_IN_MONO;
  private static final int RECORDER_AUDIO_ENCODING    = AudioFormat.ENCODING_PCM_16BIT;
  private AudioRecord recorder                        = null;
  private static final String TAG                     = "AudioRecorderActivity";
  short[][]   buffers                                 = new short[256][160];
  int         ix                                      = 0;
  private boolean     stopped                         = false;

  private void startRecording() {

    android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);
    try {
      int N = AudioRecord.getMinBufferSize (  
                          RECORDER_SAMPLERATE, 
                          RECORDER_CHANNELS, 
                          RECORDER_AUDIO_ENCODING) * 20;

      recorder = new  AudioRecord(AudioSource.MIC,
                    RECORDER_SAMPLERATE, 
                    RECORDER_CHANNELS,
                    RECORDER_AUDIO_ENCODING,N );        

      recorder.startRecording();

      while(!stopped) {
        short[] buffer = buffers[ix++ % buffers.length];      
        N = recorder.read(buffer,0,buffer.length);
      }

    } 
    catch(Throwable x) { 
      Log.v(TAG,"Error reading voice audio",x);
      x.printStackTrace();
    } 
    finally { 
      stopped = true;
      stopRecording();
    }    
  }  
}

Question : Though the code snippet is based on an exaple from StackOverflow, it is not working Please let me know what could be the mistake ?

Here is the Error Message

12-20 03:44:32.271: E/AudioRecord(224): AudioFlinger could not create record track, status: -1
12-20 03:44:32.271: E/AudioRecord-JNI(224): Error creating AudioRecord instance: initialization check failed.
12-20 03:44:32.271: E/AudioRecord-Java(224): [ android.media.AudioRecord ] Error code -20 when initializing native AudioRecord object.

解决方案

Add record_audio permission to AndroidManifest.xml

<uses-permission android:name="android.permission.RECORD_AUDIO" />

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