来电监听及录音.md

来电监听及录音

1. 来电状态监听

   public class MyService extends Service {
   
   	private MediaRecorder mRecorder;
   	private String num;
   
   	@Override
   	public void onCreate() {
   		super.onCreate();
   		TelephonyManager manager = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);    // 获取电话管理器
   		manager.listen(new MyPhoneStateListener(), PhoneStateListener.LISTEN_CALL_STATE);    // 监听电话状态
   	}
   
   	private class MyPhoneStateListener extends PhoneStateListener {            // 电话状态监听器
   		public void onCallStateChanged(int state, String incomingNumber) {    // 在电话状态改变时执行
   			switch (state) {
   				case TelephonyManager.CALL_STATE_RINGING:    // 振铃
   					System.out.println("来电话了");
   					num = incomingNumber;//得到来电号码
   					break;        
   				case TelephonyManager.CALL_STATE_OFFHOOK:    // 摘机
   					System.out.println("开始通话");
   					start();
   					break;    
   				case TelephonyManager.CALL_STATE_IDLE:        // 空闲
   					System.out.println("挂断电话");
   					stop();
   					break;
   			}
   		}
   	}
   	
   	public void onDestroy() {
   		tm.listen(listener, PhoneStateListener.LISTEN_NONE);// 取消监听
   		listener = null;
   	}

2. 录音

   private void start() {
       mRecorder = new MediaRecorder();                            // 创建媒体记录器
       mRecorder.setAudioSource(MediaRecorder.AudioSource.VOICE_CALL);       // 指定音频源(麦克风)
       mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);      // 设置输出格式(3gp)
       mRecorder.setOutputFile("/mnt/sdcard/" + num + "-" + System.currentTimeMillis() + ".3gp");    // 指定文件路径(SD卡)
       mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);       // 指定编码(AMR_NB)
       try {
           mRecorder.prepare();    // 准备
       } catch (Exception e) {
           e.printStackTrace();
       }    
       mRecorder.start();   // 开始
   }
   
   @Override
   public IBinder onBind(Intent intent) {
       return null;
   }
   
   //下面是录音
   private void stop() {
       if (mRecorder != null) {
           mRecorder.stop();        // 停止
           mRecorder.release();    // 释放
           mRecorder = null;        // 垃圾回收
       }
   }

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