android 使用 audiorecord 和 audiotrack 实现实时录音播放

基本思路就是用 audiorecord不断得到音频数据，然后使用audiotrack 播放

//得到音频

package com.ysg.audiotest;import java.io.IOException;import java.io.PipedInputStream;import java.io.PipedOutputStream;import android.content.Context;import android.media.AudioFormat;import android.media.AudioRecord;import android.media.MediaRecorder;/* * To getaudio or play audio * */public class mAudio {private AudioRecord audioRecord;private Context context;private boolean isRecording = false ;private PipedOutputStream outstream ;//利用管道传输数据public mAudio(Context context , PipedInputStream instream) throws IOException {this.context  = context;//初始化管道流 用于向外传输数据outstream = new PipedOutputStream();outstream.connect(instream);}public void StartAudioData(){//得到录音数据int frequency = 11025;@SuppressWarnings("deprecation")int channelConfiguration = AudioFormat.CHANNEL_CONFIGURATION_STEREO;int audioEncoding = AudioFormat.ENCODING_PCM_16BIT;int buffersize = AudioRecord.getMinBufferSize(frequency, channelConfiguration, audioEncoding);audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, frequency, channelConfiguration, audioEncoding, buffersize);byte[]buffer  = new byte[buffersize];audioRecord.startRecording();//开始录音isRecording = true; int bufferReadSize = 1024; while (isRecording){audioRecord.read(buffer, 0, bufferReadSize);try {outstream.write(buffer, 0, bufferReadSize);} catch (IOException e) {e.printStackTrace();}}}public void stopRecord(){//停止录音isRecording = false;audioRecord.stop();try {outstream.close();} catch (IOException e) {e.printStackTrace();}}}

播放音频

package com.ysg.audiotest;import java.io.IOException;import java.io.PipedInputStream;import java.io.PipedOutputStream;import android.media.AudioFormat;import android.media.AudioManager;import android.media.AudioTrack;public class mAudioPlayer {private PipedInputStream instream;private boolean isPlaying ;private AudioTrack audioplayer;private byte[] buffer;public mAudioPlayer() {isPlaying = false;instream = null;//初始化播音类@SuppressWarnings("deprecation")int bufsize = AudioTrack.getMinBufferSize(11025, AudioFormat.CHANNEL_CONFIGURATION_STEREO,AudioFormat.ENCODING_PCM_16BIT);audioplayer = new AudioTrack(AudioManager.STREAM_MUSIC, 11025, AudioFormat.CHANNEL_CONFIGURATION_STEREO, AudioFormat.ENCODING_PCM_16BIT, bufsize,AudioTrack.MODE_STREAM);}//设置管道流，用于接受音频数据public void setOutputStream(PipedOutputStream out) throws IOException{instream = new PipedInputStream(out);}public void startPlayAudio(){ //调用之前先调用setOutputStream 函数isPlaying = true;audioplayer.play();//开始接受数据流播放buffer = new byte[1024];while (instream!=null&&isPlaying){try {while (instream.available()>0){int size = instream.read(buffer);audioplayer.write(buffer, 0, size);//不断播放数据}} catch (IOException e) {e.printStackTrace();}}}public void stopPlay(){//停止播放isPlaying = false ;try {instream.close();} catch (IOException e) {e.printStackTrace();}audioplayer.stop();}}

activity

package com.ysg.audiotest;import java.io.IOException;import java.io.PipedInputStream;import java.io.PipedOutputStream;import android.app.Activity;import android.os.Bundle;import android.view.View;public class MainActivity extends Activity {PipedInputStream in;boolean isRrcord;mAudio mm ;mAudioPlayer m;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);  isRrcord = false; }public void btnclick(View v){if (isRrcord){isRrcord = false;mm.stopRecord();m.stopPlay();}else{isRrcord = true;startRecord();}}private void startRecord(){in = new PipedInputStream();      new Thread(new Runnable() {@Overridepublic void run() {try {mm = new mAudio(MainActivity.this, in);mm.StartAudioData();} catch (IOException e) {e.printStackTrace();}}}).start(); new Thread(new Runnable() {@Overridepublic void run() {byte[] buffer = new byte[1024];PipedOutputStream pout = new PipedOutputStream();    m = new mAudioPlayer();try {m.setOutputStream(pout);new Thread(new Runnable() {@Overridepublic void run() {// TODO Auto-generated method stubm.startPlayAudio();}}).start();} catch (IOException e1) {e1.printStackTrace();}int size = 0 ;try {while (true){while (in.available()>0){size = in.read(buffer);pout.write(buffer, 0, size);}}} catch (IOException e) {e.printStackTrace();}}}).start();}}

再者注意添加权限：

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