如何在Android中使用音频api录制音频?
我有一部LG安卓手机,版本为2.3.3。我需要在耳机插孔中连接一个麦克风,因为我想创建一个可以读取声音样本的应用程序 如何以编程方式阅读示例 2) 如何以编程方式阅读示例 据我所知,在安卓系统中,您可以使用以下两类之一录制音频:如何在Android中使用音频api录制音频?,android,microphone,Android,Microphone,我有一部LG安卓手机,版本为2.3.3。我需要在耳机插孔中连接一个麦克风,因为我想创建一个可以读取声音样本的应用程序 如何以编程方式阅读示例 2) 如何以编程方式阅读示例 据我所知,在安卓系统中,您可以使用以下两类之一录制音频: 用于录制音频和视频。记录控制基于一个简单的状态机 AudioRecord类管理Java应用程序的音频资源,以便从平台的音频输入硬件录制音频。这是通过“拉”(读取)音频记录对象中的数据来实现的。应用程序负责使用以下三种方法之一及时轮询AudioRecord对象:读
- 用于录制音频和视频。记录控制基于一个简单的状态机
- AudioRecord类管理Java应用程序的音频资源,以便从平台的音频输入硬件录制音频。这是通过“拉”(读取)音频记录对象中的数据来实现的。应用程序负责使用以下三种方法之一及时轮询AudioRecord对象:读取(byte[],int,int)、读取(short[],int,int)或读取(ByteBuffer,int)。选择使用哪种方法将基于音频数据存储格式,该格式对音频记录用户最为方便
1) 你推荐哪种话筒 正如我在对您的问题的评论中所提到的,这是关于stackoverflow的,但为了完整起见:
public class AudioCapturer implements Runnable {
private AudioRecord audioRecorder = null;
private int bufferSize;
private int samplePerSec = 16000;
private String LOG_TAG = "AudioCapturer";
private Thread thread = null;
private boolean isRecording;
private static AudioCapturer audioCapturer;
private IAudioReceiver iAudioReceiver;
private AudioCapturer(IAudioReceiver audioReceiver) {
this.iAudioReceiver = audioReceiver;
}
public static AudioCapturer getInstance(IAudioReceiver audioReceiver) {
if (audioCapturer == null) {
audioCapturer = new AudioCapturer(audioReceiver);
}
return audioCapturer;
}
public void start() {
bufferSize = AudioRecord.getMinBufferSize(samplePerSec, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT);
if (bufferSize != AudioRecord.ERROR_BAD_VALUE && bufferSize != AudioRecord.ERROR) {
audioRecorder = new AudioRecord(MediaRecorder.AudioSource.DEFAULT, this.samplePerSec, AudioFormat.CHANNEL_IN_MONO,
AudioFormat.ENCODING_PCM_16BIT, this.bufferSize * 10); // bufferSize
// 10x
if (audioRecorder != null && audioRecorder.getState() == AudioRecord.STATE_INITIALIZED) {
Log.i(LOG_TAG, "Audio Recorder created");
audioRecorder.startRecording();
isRecording = true;
thread = new Thread(this);
thread.start();
} else {
Log.e(LOG_TAG, "Unable to create AudioRecord instance");
}
} else {
Log.e(LOG_TAG, "Unable to get minimum buffer size");
}
}
public void stop() {
isRecording = false;
if (audioRecorder != null) {
if (audioRecorder.getRecordingState() == AudioRecord.RECORDSTATE_RECORDING) {
// System.out
// .println("Stopping the recorder inside AudioRecorder");
audioRecorder.stop();
}
if (audioRecorder.getState() == AudioRecord.STATE_INITIALIZED) {
audioRecorder.release();
}
}
}
public boolean isRecording() {
return (audioRecorder != null) ? (audioRecorder.getRecordingState() == AudioRecord.RECORDSTATE_RECORDING) : false;
}
@Override
public void run() {
android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);
while (isRecording && audioRecorder.getRecordingState() == AudioRecord.RECORDSTATE_RECORDING) {
short[] tempBuf = new short[Constants.FRAME_SIZE / 2];
audioRecorder.read(tempBuf, 0, tempBuf.length);
iAudioReceiver.capturedAudioReceived(tempBuf, false);
}
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#finalize()
*/
@Override
protected void finalize() throws Throwable {
super.finalize();
System.out.println("AudioCapturer finalizer");
if (audioRecorder != null && audioRecorder.getState() == AudioRecord.STATE_INITIALIZED) {
audioRecorder.stop();
audioRecorder.release();
}
audioRecorder = null;
iAudioReceiver = null;
thread = null;
}
}
现在,您可以从程序的主类中使用该类的对象,它将开始提供音频样本,您可以在IAudioReceiver(使用这些样本的类)中处理它们
如果您仍然想使用MediaRecorder,它可能对您有用,您应该将此问题分为两个不同的问题。你应该问的第一部分!