Android:如何检测用户何时停止与麦克风通话

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

private AudioRecord audioRecord;
private boolean isRecording = false;
private int bufferSize;

// 初始化录音功能
private void initAudioRecord() {
    int sampleRate = 44100; // 采样率
    int channelConfig = AudioFormat.CHANNEL_IN_MONO; // 单声道
    int audioFormat = AudioFormat.ENCODING_PCM_16BIT; // 16位PCM编码

    bufferSize = AudioRecord.getMinBufferSize(sampleRate, channelConfig, audioFormat);
    audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, sampleRate, channelConfig, audioFormat, bufferSize);
}

// 开始录音
private void startRecording() {
    isRecording = true;
    audioRecord.startRecording();

    // 创建一个线程来检测用户是否停止与麦克风的通话
    Thread detectionThread = new Thread(new Runnable() {
        @Override
        public void run() {
            short[] buffer = new short[bufferSize];
            while (isRecording) {
                int readSize = audioRecord.read(buffer, 0, bufferSize);
                if (readSize > 0) {
                    // 计算音量
                    int volume = calculateVolume(buffer, readSize);
                    if (volume < threshold) {
                        // 用户停止与麦克风的通话
                        stopRecording();
                    }
                }
            }
        }
    });
    detectionThread.start();
}

// 停止录音
private void stopRecording() {
    isRecording = false;
    audioRecord.stop();
}

// 计算音量
private int calculateVolume(short[] buffer, int readSize) {
    long sum = 0;
    for (int i = 0; i < readSize; i++) {
        sum += buffer[i] * buffer[i];
    }
    double rms = Math.sqrt(sum / readSize);
    int volume = (int) (20 * Math.log10(rms));
    return volume;
}