android - AudioFlinger 无法创建记录轨道，状态 : -1 Error creating AudioRecord instance: initialization check failed with status -1

Question

当我尝试在 android 6.0 设备上运行代码时出现此错误

AudioFlinger 无法创建记录轨道，状态:-1 创建 AudioRecord 时出错
实例:初始化检查失败，状态为 -1。

我有这段代码在较低版本的设备上运行良好

private void startRecording()
{
    bufferSize = AudioRecord.getMinBufferSize(11025,
        AudioFormat.CHANNEL_CONFIGURATION_MONO,
        AudioFormat.ENCODING_PCM_16BIT);

    recorder = new AudioRecord(MediaRecorder.AudioSource.MIC,
        11025, AudioFormat.CHANNEL_CONFIGURATION_MONO,
        RECORDER_AUDIO_ENCODING, 1024);

    int i = recorder.getState();

    if (i==1)
    {
        recorder.startRecording();
        ShowToast("Recording started successfully");
    }

    isRecording = true;

    recordingThread = new Thread(new Runnable()
    {
        @Override
        public void run() 
        {
            writeAudioDataToFile();
        }
    }, "AudioRecorder Thread");

    recordingThread.start();
}

Answer 1

我假设你已经设置了 <uses-permission android:name="android.permission.RECORD_AUDIO" /> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" /> manifest.xml 中的权限

在 Android 版本 > 6.0 上，音频被视为“危险”权限，因此您还需要在运行时通过添加代码来请求权限。相关说明如下:

https://developer.android.com/training/permissions/requesting.html