[Android开发]Android 来电监听及录音

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;
}

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
}
}