Android：初始化本机AudioRecord对象时出现AudioRecord错误代码-20 [英] Android: AudioRecord Error code -20 when initializing native AudioRecord object

问题描述

Android：我想从麦克风读取缓冲区，以便可以对其执行处理，以下是我的代码

Android: I want to read buffers from mic so that i can perform process on it, Following is my code

int sampleRateInHz = 8000;// 44100, 22050 and 11025
        int channelConfig = AudioFormat.CHANNEL_CONFIGURATION_MONO;
        int audioFormat = AudioFormat.ENCODING_PCM_16BIT;

        //int bufferSize =11025 + 
        int bufferSize = AudioRecord.getMinBufferSize(sampleRateInHz,channelConfig, audioFormat);


        short[] buffer = new short[bufferSize];

        AudioRecord audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, sampleRateInHz,channelConfig, audioFormat, bufferSize);

        if(audioRecord.getState()== AudioRecord.STATE_INITIALIZED){
            audioRecord.startRecording();
            Log.e("recording", "before");


            boolean flag = true;
            while (flag) {
                int bufferReadResult = audioRecord.read(buffer, 0, bufferSize);
                System.out.println(buffer);
            }

            audioRecord.stop();
            audioRecord.release();
        }
        Log.e("recording", "stopeed");


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

每次尝试测试程序时都会出现以下错误

I get following error every time i try to test the program

06-04 00：18：17.222：E / AudioRecord-Java（488）：[android.media.AudioRecord]初始化本机AudioRecord对象时出现错误代码-20。

06-04 00:18:17.222: E/AudioRecord-Java(488): [ android.media.AudioRecord ] Error code -20 when initializing native AudioRecord object.

推荐答案

据我了解，CHANNEL_CONFIGURATION_MONO已过时，当您读入缓冲区时，应该改用CHANNEL_IN_MONO。我在实例化AudioRecord对象时遇到了类似的问题，事实证明这是我的解决方案。

From what I understand, CHANNEL_CONFIGURATION_MONO is depreciated and you should use instead CHANNEL_IN_MONO when reading into the buffer. I had a similar problem with instantiating the AudioRecord object and this turned out to be the solution for me.

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