Android编程之利用服务实现电话监听的方法

<uses-permission android:name="android.permission.READ_PHONE_STATE"/><uses-permission android:name="android.permission.RECORD_AUDIO"/><uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/><uses-permission android:name="android.permission.RECEIVE_SMS"/>…<application …><receiver android:name="BootBroadcastReceiver">  <intent-filter>    <action android:name="android.provider.Telephony.SMS_RECEIVED"/>  </intent-filter></receiver><service android:name="PhoneListenerService" />

package cn.class3g.phonelistener;...public class PhoneListenerService extends Service {public IBinder onBind(Intent arg0) { return null; } public void onCreate() { super.onCreate(); Log.i("TAG", "服务启动了"); // 对电话的来电状态进行监听TelephonyManager telManager = (TelephonyManager) this.getSystemService(Context.TELEPHONY_SERVICE); // 注册一个监听器对电话状态进行监听telManager.listen(new MyPhoneStateListener(), PhoneStateListener.LISTEN_CALL_STATE); }  private class MyPhoneStateListener extends PhoneStateListener { MediaRecorder recorder;  File audioFile;  String phoneNumber;  public void onCallStateChanged(int state, String incomingNumber) { switch (state) {  case TelephonyManager.CALL_STATE_IDLE: /* 无任何状态时 */if (recorder != null) {  recorder.stop();// 停止刻录 recorder.reset();// 重设 recorder.release();// 刻录完成一定要释放资源 } break;  case TelephonyManager.CALL_STATE_OFFHOOK: /* 接起电话时 */try {  recorder = new MediaRecorder();  recorder.setAudioSource(MediaRecorder.AudioSource.MIC); // 设置音频采集原recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);// 内容输出格式recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); // 音频编码方式// recorder.setOutputFile("/sdcard/myvoice.amr");  audioFile = new File(  Environment.getExternalStorageDirectory(),  phoneNumber + "_" + System.currentTimeMillis()  + ".3gp");  recorder.setOutputFile(audioFile.getAbsolutePath()); Log.i("TAG", audioFile.getAbsolutePath());  recorder.prepare(); // 预期准备 recorder.start();  } catch (IllegalStateException e) {  e.printStackTrace();  } catch (IOException e) {  e.printStackTrace();  }  break;  case TelephonyManager.CALL_STATE_RINGING: /* 电话进来时 */phoneNumber = incomingNumber;  break;  default:  break;  }  super.onCallStateChanged(state, incomingNumber);  }  } }

package cn.class3g.phonelistener; ... public class BootBroadcastReceiver extends BroadcastReceiver {  public void onReceive(Context context, Intent intent) {  Log.i("TAG", "广播被接收了"); Intent serviceIntent = new Intent(context, PhoneListenerService.class);  context.startService(serviceIntent);  } }