AlarmManager am = (AlarmManager) getActivity()
 .getSystemService(Context.ALARM_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
 am.setExact(AlarmManager.RTC_WAKEUP, TimeUtils
 .stringToLong(recordTime, TimeUtils.NO_SECOND_FORMAT), sender);
}else {
 am.set(AlarmManager.RTC_WAKEUP, TimeUtils
 .stringToLong(recordTime, TimeUtils.NO_SECOND_FORMAT), sender);
}

@Override
public void onCreate() {
 super.onCreate();
 Daemon.run(DaemonService.this, 
  DaemonService.class, Daemon.INTERVAL_ONE_MINUTE);
 startTimeTask();
 grayGuard();
}

private void grayGuard() {
 if (Build.VERSION.SDK_INT < 18) {
 //API < 18 ，此方法能有效隐藏Notification上的图标
 startForeground(GRAY_SERVICE_ID, new Notification());
 } else {
 Intent innerIntent = new Intent(this, DaemonInnerService.class);
 startService(innerIntent);
 startForeground(GRAY_SERVICE_ID, new Notification());
 }

 //发送唤醒广播来促使挂掉的UI进程重新启动起来
 AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
 Intent alarmIntent = new Intent();
 alarmIntent.setAction(WakeReceiver.GRAY_WAKE_ACTION);
 PendingIntent operation = PendingIntent.getBroadcast(this, 
 WAKE_REQUEST_CODE, alarmIntent, PendingIntent.FLAG_UPDATE_CURRENT);
 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
 alarmManager.setWindow(AlarmManager.RTC_WAKEUP, 
  System.currentTimeMillis(), ALARM_INTERVAL, operation);
 }else {
 alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, 
  System.currentTimeMillis(), ALARM_INTERVAL, operation);
 }
}

/**
 * 给 API >= 18 的平台上用的灰色保活手段
 */
public static class DaemonInnerService extends Service {

 @Override
 public void onCreate() {
 Log.i(LOG_TAG, "InnerService -> onCreate");
 super.onCreate();
 }

 @Override
 public int onStartCommand(Intent intent, int flags, int startId) {
 Log.i(LOG_TAG, "InnerService -> onStartCommand");
 startForeground(GRAY_SERVICE_ID, new Notification());
 //stopForeground(true);
 stopSelf();
 return super.onStartCommand(intent, flags, startId);
 }

 @Override
 public IBinder onBind(Intent intent) {
 throw new UnsupportedOperationException("Not yet implemented");
 }

 @Override
 public void onDestroy() {
 Log.i(LOG_TAG, "InnerService -> onDestroy");
 super.onDestroy();
 }
}

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
 mJobScheduler = (JobScheduler) getSystemService(Context.JOB_SCHEDULER_SERVICE);
 JobInfo.Builder builder = new JobInfo.Builder(JOB_ID,
  new ComponentName(getPackageName(), JobSchedulerService.class.getName()));

 builder.setPeriodic(60 * 1000); //每隔60秒运行一次
 builder.setRequiresCharging(true);
 builder.setPersisted(true); //设置设备重启后，是否重新执行任务
 builder.setRequiresDeviceIdle(true);

 if (mJobScheduler.schedule(builder.build()) <= 0) {
 //If something goes wrong
 }
}

@TargetApi(Build.VERSION_CODES.M)
public static boolean isIgnoringBatteryOptimizations(Activity activity){
 String packageName = activity.getPackageName();
 PowerManager pm = (PowerManager) activity
  .getSystemService(Context.POWER_SERVICE);
 if (pm.isIgnoringBatteryOptimizations(packageName)) {
 return true;
 }else {
 return false;
 }
}

/**
* 针对N以上的Doze模式
*
* @param activity
*/
public static void isIgnoreBatteryOption(Activity activity) {
 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
 try {
  Intent intent = new Intent();
  String packageName = activity.getPackageName();
  PowerManager pm = (PowerManager) activity.getSystemService(Context.POWER_SERVICE);
  if (!pm.isIgnoringBatteryOptimizations(packageName)) {
//  intent.setAction(Settings.ACTION_IGNORE_BATTERY_OPTIMIZATION_SETTINGS);
  intent.setAction(Settings.ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS);
  intent.setData(Uri.parse("package:" + packageName));
  activity.startActivityForResult(intent, REQUEST_IGNORE_BATTERY_CODE);
  }
 } catch (Exception e) {
  e.printStackTrace();
 }
 }
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 if (resultCode == RESULT_OK) {
 if (requestCode == BatteryUtils.REQUEST_IGNORE_BATTERY_CODE){
  //TODO something
 }
 }else if (resultCode == RESULT_CANCELED){
 if (requestCode == BatteryUtils.REQUEST_IGNORE_BATTERY_CODE){
  ToastUtils.show(getActivity(), "请开启忽略电池优化~");
 }
 }
}

private void initAlarmService() {
 startService(new Intent(this, DaemonService.class));//启动闹钟服务
 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
 //JobScheduler
 ...
 }

 //绑定闹钟服务
 Intent intent = new Intent(this, DaemonService.class);
 intent.setAction("android.intent.action.DaemonService");
 bindService(intent, mConnection, Context.BIND_AUTO_CREATE);
}

@Override
protected void onDestroy() {
 super.onDestroy();
 try {//判断是否有闹钟，没有则关闭闹钟服务
 String alarm = localPreferencesHelper.getString(LocalPreferencesHelper.ALARM_CLOCK);
 if (daemonService != -1 && mIRemoteService != null) {
//  android.os.Process.killProcess(daemonService);
  mIRemoteService.resetAlarm();
 }

 if (!alarm.equals("[]")) {
  if (daemonService != -1) {
  startService(new Intent(this, DaemonService.class));
  }
 } else {
  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
  mJobScheduler.cancel(JOB_ID);
  }

 }
 unbindService(mConnection); //解除绑定服务。
 } catch (Exception e) {

 }
}