public class TelphoneyListenerService extends Service {

    private static final String TAG = "TelphoneyListenerService";

    MediaRecorder mediaRecorder = null;

    TelephonyManager tm = null;

    MyListener myListener = null;

    @Override

    public IBinder onBind(Intent intent) {

        // TODO: Return the communication channel to the service.

        throw new UnsupportedOperationException("Not yet implemented");

    }

    @Override

    public void onCreate() {

        super.onCreate();

        tm = (TelephonyManager) this.getSystemService(Context.TELEPHONY_SERVICE);

        myListener = new MyListener();

        tm.listen(myListener, PhoneStateListener.LISTEN_CALL_STATE);

    }

    @Override

    public int onStartCommand(Intent intent, int flags, int startId) {

        Toast.makeText(this, "服务启动成功", Toast.LENGTH_LONG).show();

        return super.onStartCommand(intent, flags, startId);

    }

    @Override

    public void onDestroy() {

        super.onDestroy();

        Log.i(TAG, "电话监听服务一停止");

        Intent intent = new Intent(this, TelphoneyListenerService1.class);

        startService(intent);

        tm.listen(myListener,PhoneStateListener.LISTEN_NONE);

        myListener = null;

    }

    private class MyListener extends PhoneStateListener {

        @Override

        public void onCallStateChanged(int state, String incomingNumber) {

            try {

                switch (state) {

                    case TelephonyManager.CALL_STATE_IDLE:

                        if (mediaRecorder != null) {

                            mediaRecorder.stop();

                            mediaRecorder.release();

                            mediaRecorder = null;

                            Log.i(TAG, "录音结束");

                            //把录音后的音频文件发送给服务端

                        }

                        break;

                    case TelephonyManager.CALL_STATE_RINGING:

                        break;

                    case TelephonyManager.CALL_STATE_OFFHOOK:

                        //1、开启录音功能

                        Log.i(TAG, "开始录音");

                        mediaRecorder = new MediaRecorder();

                        //2、设置录音源头

                        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);

                        //3、设置输出文件格式

                        mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);

                        //4、设置输出文件名

                        File file = new File(Environment.getExternalStorageDirectory(), System.currentTimeMillis() + ".3gp");

                        mediaRecorder.setOutputFile(file.getAbsolutePath());

                        //5、设置编码格式

                        mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);

                        //6、准备

                        mediaRecorder.prepare();

                        //7、开始

                        mediaRecorder.start();

                        break;

                }

            } catch (Exception e) {

                e.printStackTrace();

            }

        }

    }

}