java - Android:当 SAMPLERATE 设置为 44100 时，startRecording() 在未初始化的 AudioRecord 上调用

Question

当我将 AudioRecord 对象的采样率设置为 44100 时出现错误。当它是 22050 时，它工作正常。

02-16 10:45:45.099 24021-24021/com.vlad.jackcomms E/AudioRecord:frameCount 1024 < minFrameCount 1792

02-16 10:45:45.099 24021-24021/com.vlad.jackcomms E/AudioRecord-JNI:创建 AudioRecord 实例时出错:初始化检查失败。

02-16 10:45:45.099 24021-24021/com.vlad.jackcomms E/android.media.AudioRecord:初始化原生AudioRecord对象时错误代码-20。

02-16 10:45:45.109 24021-24021/com.vlad.jackcomms E/AndroidRuntime:致命

异常(exception):主要 进程:com.vlad.jackcomms，PID:24021 java.lang.IllegalStateException: startRecording() 在未初始化的 AudioRecord 上调用。

相关代码如下:

private static final int RECORDER_SAMPLERATE = 22050*2;
private static final int RECORDER_CHANNELS = AudioFormat.CHANNEL_IN_MONO;
private static final int RECORDER_AUDIO_ENCODING = AudioFormat.ENCODING_PCM_16BIT;

    recorder = new AudioRecord(MediaRecorder.AudioSource.MIC,
            RECORDER_SAMPLERATE, RECORDER_CHANNELS,
            RECORDER_AUDIO_ENCODING, BufferElements2Rec * BytesPerElement);

    recorder.startRecording();

Answer 1

别忘了请求 AUDIO_RECORD 权限

private void checkRecordPermission() {

    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO)
            != PackageManager.PERMISSION_GRANTED) {

        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.RECORD_AUDIO},
                123);
    }