/**  * 播放伴奏  */ private MediaPlayer player; /**  * 返回按鈕  */ private ImageView btnBack; /**  * 切換歌曲  */ private Button btnSwitchSong; /**  * 伴唱時長  */ private TextView tv_recod_time; /**  * 歌詞VIEW  */ private LyricView lv_lyric; /**  * 開始錄制  */ private Button btnPlay; /**  * 標題  */ private TextView ivTitle; private boolean canPlay = true; private boolean isPause = false;  /***  * 背景音樂模式  */ private BackgroudMusicMode mode = BackgroudMusicMode.Accompany; /**  * 歌曲id  */ private String songId; /**  * 歌曲名稱  */ private String songName; /**  * 歌手名字  */ private String singerName; /**  * 伴奏文件  */ private File file; /**  * 是否正在錄制  */ private boolean isStart = false; /**  * 錄音狀態  */ private boolean starting = false; /**  * 伴奏時間  */ private int bztimetmp = 0; /**  * 伴奏時間  */ private String bztime = "";  /**  * 錄制時間  */ private int recordTimeLength=0; /**  * 更新伴奏時間  */ private RecordTask rt = null;  /**  * 錄制頻率，單位hz.這里的值注意了，寫的不好，可能實例化AudioRecord對象的時候，會出錯。我開始寫成11025就不行。這取決于硬件設備  * 設置音頻采樣率，44100是目前的標準，但是某些設備仍然支持22050，16000，11025  */ private int sampleRateInHz = 44100; /**  * 設置音頻的錄制的聲道CHANNEL_IN_STEREO為雙聲道，CHANNEL_CONFIGURATION_MONO為單聲道  */ private int channelConfig = AudioFormat.CHANNEL_CONFIGURATION_MONO;  /**  * 音頻數據格式:PCM 16位每個樣本。保證設備支持。PCM 8位每個樣本。不一定能得到設備支持。  */ private int audioFormat = AudioFormat.ENCODING_PCM_16BIT;  /**  * 調整播放音量  */ private AudioManager audioManager;  /**  * 最大音量  */ private int maxVolume = 0;  /**  * 當前音量  */ private int currentVolume = 0;  /**  * AudioRecord 寫入緩沖區大小  */ protected int m_in_buf_size; /**  * 錄制音頻對象  */ private AudioRecord mRecorder; /**  * 錄入的字節數組  */ private byte[] m_in_bytes; /**  * 存放錄入字節數組的大小  */ private LinkedList<byte[]> m_in_q; /**  * AudioTrack 播放緩沖大小  */ private int m_out_buf_size; /**  * 播放音頻對象  */ private AudioTrack mAudioTrack; /**  * 播放的字節數組  */ private byte[] m_out_bytes; /**  * 錄制音頻線程  */ private Thread record; /**  * 播放音頻線程  */ private Thread play; /**  * 讓線程停止的標志  */ private boolean flag = true; /**  * 是否啟動回聲  */ private boolean room_flag = true;  /***上面有個播放歌詞的組件  /***  * 初始化  */ private void init() {    audioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);  maxVolume = audioManager.getStreamMaxVolume(AudioManager.STREAM_VOICE_CALL);  currentVolume = audioManager.getStreamVolume(AudioManager.STREAM_VOICE_CALL);  registerHeadsetPlugReceiver();  ycApplication = (YueChangApplication) getApplication();  coverDao = new CoverDao(getApplicationContext());  Bundle bundle = getIntent().getExtras();  songId = bundle.getString("songId");  songName = bundle.getString("songName");  singerName = bundle.getString("singerName");  if (songId != null) {   // AudioRecord 得到錄制最小緩沖區的大小   m_in_buf_size = AudioRecord.getMinBufferSize(sampleRateInHz, channelConfig, audioFormat);   // 實例化播放音頻對象   mRecorder = new AudioRecord(MediaRecorder.AudioSource.MIC, sampleRateInHz, channelConfig, audioFormat,     m_in_buf_size);   // 實例化一個字節數組，長度為最小緩沖區的長度   m_in_bytes = new byte[m_in_buf_size];   // 實例化一個鏈表，用來存放字節組數   m_in_q = new LinkedList<byte[]>();    // AudioTrack 得到播放最小緩沖區的大小   m_out_buf_size = AudioTrack.getMinBufferSize(sampleRateInHz, channelConfig, audioFormat);   // 實例化播放音頻對象   mAudioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, sampleRateInHz, channelConfig, audioFormat,     m_out_buf_size, AudioTrack.MODE_STREAM);   // 實例化一個長度為播放最小緩沖大小的字節數組   m_out_bytes = new byte[m_out_buf_size];   record = new Thread(new recordSound());   //   if(ycApplication.isHeadsetplug()){    //   }else{//    m_out_trk = new AudioTrack(AudioManager.STREAM_MUSIC, sampleRateInHz, channelConfig, audioFormat,//      m_out_buf_size, AudioTrack.MODE_STREAM);//   }      } }   /**  *  * 類描述：錄音線程   *  * @version 1.0  */ class recordSound implements Runnable {  @Override  public void run() {   // 初始化輸出流   DataOutputStream dos = null;   try {    File audioFile = new File(SongUtil.getRecordSingPCMPath(songId));    // 初始化輸出流    dos = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(audioFile)));    byte[] bytes_pkg;    if (mRecorder.getState() == AudioRecord.STATE_UNINITIALIZED) {     // 實例化播放音頻對象     mRecorder = new AudioRecord(MediaRecorder.AudioSource.MIC, sampleRateInHz, channelConfig,       audioFormat, m_in_buf_size);    }     // 開始錄音    mRecorder.startRecording();    while (flag) {     int size = mRecorder.read(m_in_bytes, 0, m_in_buf_size);     bytes_pkg = m_in_bytes.clone();     if (m_in_q.size() >= 2) {      m_in_q.removeFirst();     }     m_in_q.add(bytes_pkg);     if ((ycApplication.isHeadsetplug() && ycApplication.isOpenInEarphone())       || (!ycApplication.isHeadsetplug() && ycApplication.isOpenInSpeaker())) {      //Log.d(SingSingleActivity.this.getClass().getName(), "啟動錄音播放1");      if (play == null||!room_flag) {       //Log.d(SingSingleActivity.this.getClass().getName(), "啟動錄音播放2");       room_flag = true;       play = new Thread(new playRecord());       // 啟動播放線程       play.start();      }      } else {      if(room_flag||play != null){       //Log.d(SingSingleActivity.this.getClass().getName(), "關閉錄音播放1");       room_flag = false;       if (play != null) {        play.interrupt();       }       play = null;      }     }     // 寫入PCM文件     dos.write(bytes_pkg, 0, size);     dos.flush();    }    } catch (Exception e) {    // TODO: handle exception    e.printStackTrace();   } finally {    try {     // 關閉錄音     if (mRecorder != null) {      try {       if (mRecorder.getState() == AudioRecord.STATE_INITIALIZED) {        // 關閉錄音        mRecorder.stop();        mRecorder.release();       }      } catch (Exception e2) {       // TODO: handle exception      }     }     if (dos != null) {      dos.close();     }    } catch (Exception e2) {     // TODO: handle exception     e2.printStackTrace();    }   }   } }

/*** * 方法描述：本地方法調用JNI合并mp3PCM與sourcePCM * @param sourcePCM * @param mp3PCM * @param mixPCM * @return */ public static native int mix2PCMToPCM(String sourcePCM, String mp3PCM, String mixPCM);  String recordPCMPath = SongUtil.getRecordSingPCMPath(songId); //錄音生成的PCM文件      String accompanyPCMPath = SongUtil.getAccompanySongPCMPath(songId); //伴奏解碼生成的PCM文件      String mixPCMPath = SongUtil.getMixSingPCMPath(songId); //合成后的PCM文件      String mixMP3Path = SongUtil.getMixSingMp3Path(songId); //合成后的MP3文件      // 混音      int code = SongEncodeUtil.mix2PCMToPCM(recordPCMPath, accompanyPCMPath, mixPCMPath);      if (code == 0) {       // 轉換混合后音頻格式 TO mp3       int i = SimpleLame.convert(mixPCMPath, mixMP3Path, m_in_buf_size);       Log.i(SingSingleActivity.this.getClass().getName(), "轉換" + i + "混音完成");       saveMp3File(mixMP3Path);      }