Android服务重新创建 _android

一箫一剑平生意，负尽狂名十五年。这篇文章主要讲述Android服务重新创建相关的知识，希望能为你提供帮助。
我正在编写一个应用程序，以便在首选日期和时间通知用户（假设每个月的第一天）
我搜索并阅读了一些帖子，建议我使用AlarmManager和BroadcastReceiver和Service
它的工作原理，但Service似乎创建了多次，Notification随机显示。我添加了log.i()来跟踪它。它收到了BOOT_RECEIVED或首先启动了应用程序的Service，初始服务和创建服务被记录，通知正确和正常显示。一段时间后，再次创建服务而没有销毁日志，并再次显示通知。这是正常的吗？
【Android服务重新创建】日志

02-23 20:17:15.235: I/CMP(19210): Init Service 02-23 20:17:15.235: I/CMP(19210): Start Service 02-23 20:17:15.285: I/CMP(19210): Create Service 02-23 20:17:15.295: I/CMP(19210): 10157 02-23 20:17:15.295: I/CMP(19210): ON START COMMAND 02-23 20:17:25.785: I/CMP(19210): action_notify 02-23 20:21:12.415: I/CMP(23666): Create Service 02-23 20:21:12.515: I/CMP(23666): 10157 02-23 20:21:12.525: I/CMP(23666): ON START COMMAND 02-23 20:21:22.515: I/CMP(23666): action_notify

服务类

public class AppService extends Service {@Override public void onCreate() { super.onCreate(); Log.i("CMP", "Create Service"); Utility.scheduleNotification(this.getBaseContext()); }@Override public IBinder onBind(Intent intent) { return null; }@Override public int onStartCommand(Intent intent, int flags, int startId) { super.onStartCommand(intent, flags, startId); Log.i("CMP", "ON START COMMAND"); return START_STICKY; }@Override public void onDestroy() { super.onDestroy(); Log.i("CMP", "Destroy Service"); Utility.cancelScheduleNotification(getBaseContext()); } }

广播接收器

public class AlarmReceiver extends BroadcastReceiver {@Override public void onReceive(Context context, Intent intent) { if (intent.getAction().equals(Intent.ACTION_BOOT_COMPLETED)) { Common.setSettings(context); if (Utility.isEnabledService(context)) { Utility.initService(context); Utility.startService(context); } } else if (intent.getAction().equals(Utility.ACTION_NOTIFY)) { Log.i("CMP", "action_notify"); Utility.genNotify(context, intent); } } }

一些功能

public static void scheduleNotification(Context context) { Common.setSettings(context); if (ScheduleTask.getAlarmManager() == null) ScheduleTask.initAlarmManager(context); Calendar cal = Calendar.getInstance(); cal.Add(Calendar.SECOND, 10); Intent intent = new Intent(context, AlarmReceiver.class); intent.setAction(Utility.ACTION_NOTIFY); intent.putExtra("Job", i); intent.putExtra("Name", name); intent.addCategory(String.format("Job_$1%s", name)); PendingIntent pi = PendingIntent.getBroadcast(context, i, intent, PendingIntent. FLAG_ONE_SHOT); ScheduleTask.getAlarmManager().set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pi); Log.i("CMP", String.valueOf(pi.getCreatorUid())); }public static void genTimeSheetNotify(Context context, Intent intent) { Intent notificationIntent = new Intent(context, MainActivity.class); PendingIntent pi = PendingIntent.getActivity(context, 0, notificationIntent, PendingIntent.FLAG_ONE_SHOT); Bundle extras = intent.getExtras(); Notification notification = new Notification.Builder(context) .setContentTitle("Test Notify") .setContentText("Testing Notify") .setSmallIcon(android.R.drawable.ic_dialog_info) .setVibrate(new long[] { 0, 100, 200, 300 }) .setLights(0xff00ff00, 100, 100) .setContentIntent(pi) .setAutoCancel(true) .build(); if (Notify.getNotificationManager() == null) Notify.initNotificationManager(context); Notify.getNotificationManager().notify(extras.getInt("Job"), notification); }public static void genTimeSheetNotify(Context context, Intent intent) { Intent notificationIntent = new Intent(context, MainActivity.class); // notificationIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); PendingIntent pi = PendingIntent.getActivity(context, 0, notificationIntent, PendingIntent.FLAG_ONE_SHOT); Bundle extras = intent.getExtras(); Notification notification = new Notification.Builder(context) .setContentTitle("TimeSheet Submission") .setContentText(String.format("Timesheet of %1$s is due today.", extras.get("Name").toString())) .setSmallIcon(android.R.drawable.ic_dialog_info) .setVibrate(new long[] { 0, 100, 200, 300 }) .setLights(0xff00ff00, 100, 100) .setContentIntent(pi) .setAutoCancel(true) .build(); if (Notify.getNotificationManager() == null) Notify.initNotificationManager(context); Notify.getNotificationManager().notify(extras.getInt("Job"), notification); }

答案系统正在终止并重新启动服务（因为它是粘性的）。因此，通知是随机创建的。您需要在onStartCommand（）中检查null的意图，因为当系统启动服务时，intent将为null。

@Override public int onStartCommand(Intent intent, int flags, int startId) { if(intent != null) { //create notification here } return START_STICKY; }