如何创建即使在 phone 重启后也始终运行的通知？

Question

我在 MainActivity 的 setAlarm() 方法中设置了一个警报管理器，其中包含来自 firebase 数据库的日期并基于该日期设置警报。当我尝试运行时，这非常好。但是当我尝试在警报时间结束之前重新启动 phone 时，什么也没有发生。

我还尝试创建一个引用服务的接收器。从这个服务 onHandleIntent(Intent intent)，我调用 MainActivity.setAlarm()。此外，我还在 android 清单中添加了权限启动完成。之后，我尝试重新启动我的 phone，当我的 phone 完成启动时，应用程序强制关闭 。我认为它停止是因为我在 activity class 调用了一个方法。

这是我的闹钟接收器

public class AlarmReceiver extends BroadcastReceiver{ @Override public void onReceive(Context context, Intent intent) { Intent notificationIntent = new Intent(context, BabyListActivity.class); TaskStackBuilder stackBuilder = TaskStackBuilder.create(context); stackBuilder.addParentStack(BabyListActivity.class); stackBuilder.addNextIntent(notificationIntent); PendingIntent pendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT); NotificationCompat.Builder builder = new NotificationCompat.Builder(context); Notification notification1 = builder.setContentTitle("1") .setContentText("New Notification From Demo App..") .setTicker("New Message Alert!") .setSmallIcon(R.mipmap.ic_launcher_round) .setContentIntent(pendingIntent).build(); NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE); notificationManager.notify(0, notification1); }

这是我的 startAlarm() 方法

public static void startAlarm(Context context){ AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE); Intent notificationIntent = new Intent("android.media.action.DISPLAY_NOTIFICATION"); notificationIntent.addCategory("android.intent.category.DEFAULT"); PendingIntent broadcast = PendingIntent.getBroadcast(context, 100, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT); Calendar cal = Calendar.getInstance(); cal.set(Calendar.YEAR, 2017); cal.set(Calendar.MONTH, 8-1); cal.set(Calendar.DAY_OF_MONTH, 10); cal.set(Calendar.HOUR_OF_DAY, 10); cal.set(Calendar.MINUTE, 15); cal.set(Calendar.SECOND, 4); alarmManager.setExact(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), broadcast); }

这是我的 BootAlarmReceiver

public class BootAlarmReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { if ("android.intent.action.BOOT_COMPLETED".equals(intent.getAction())) { // It is better to reset alarms using Background IntentService Intent i = new Intent(context, BootService.class); ComponentName service = context.startService(i); if (null == service) { // something really wrong here Log.e(TAG, "Could not start service "); } else { Log.e(TAG, "Successfully started service "); } } else { Log.e(TAG, "Received unexpected intent " + intent.toString()); } }

这是我的引导服务

public class BootService extends Service { public BootService() { super("BootService"); } @Override public void onCreate() { MainActivity.startAlarm(this); } @Override public int onStartCommand(Intent intent, int flags, int startId) { return START_NOT_STICKY; } @Override public IBinder onBind(Intent intent) { return null; }

}

这是我的android清单

<receiver android:name=".AlarmReceiver"> <intent-filter> <action android:name="android.media.action.DISPLAY_NOTIFICATION"></action> <category android:name="android.intent.category.DEFAULT" /> </intent-filter> </receiver> <service android:name=".BootService"/> <receiver android:name=".BootAlarmReceiver" android:enabled="true"> <intent-filter> <action android:name="android.intent.action.BOOT_COMPLETED" /> </intent-filter> </receiver>

谁能告诉我如何解决这个问题？谢谢...

Answer 1

我认为至少有两个错误。首先，你永远不会new一个Activity class，它应该由android框架管理，如果你只是想调用其中的一些方法，你最好将方法提取到一个utility class 或简单地将方法更改为不推荐的静态方法。其次，onHandleIntent方法将在后台线程中运行，你不能在主线程中调用应该是运行的方法。

所以在我看来，为了测试，您可以将 MainActivity 中的 startAlarm() 方法设置为静态，并且 BootService 扩展服务而不是 IntentService，进行这些更改并重试.

像这样更改 setAlarm() 方法：

public static void startAlarm(Context context){
    AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);

    Intent notificationIntent = new Intent("android.media.action.DISPLAY_NOTIFICATION");
    notificationIntent.addCategory("android.intent.category.DEFAULT");

    PendingIntent broadcast = PendingIntent.getBroadcast(context, 100, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);

    Calendar cal = Calendar.getInstance();
    cal.set(Calendar.YEAR, 2017);
    cal.set(Calendar.MONTH, 8-1);
    cal.set(Calendar.DAY_OF_MONTH, 10);
    cal.set(Calendar.HOUR_OF_DAY, 11);
    cal.set(Calendar.MINUTE, 40);
    cal.set(Calendar.SECOND, 00);

    alarmManager.setExact(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), broadcast);
}

像这样更改您的 BootAlarmReceiver：

public class BootService extends Service {


    @Override
    public void onCreate() {
        MainActivity.startAlarm(this);
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        return START_NOT_STICKY;
    }

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
}

再试一次！

Answer 2

试试这个..

public class RebootReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        if ("android.intent.action.BOOT_COMPLETED".equals(intent.getAction())) {
        AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);

        Intent notificationIntent = new Intent("android.media.action.DISPLAY_NOTIFICATION");
        notificationIntent.addCategory("android.intent.category.DEFAULT");

        PendingIntent broadcast = PendingIntent.getBroadcast(context, 100, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);

        Calendar cal = Calendar.getInstance();
        cal.set(Calendar.YEAR, 2017);
        cal.set(Calendar.MONTH, 8-1);
        cal.set(Calendar.DAY_OF_MONTH, 10);
        cal.set(Calendar.HOUR_OF_DAY, 10);
        cal.set(Calendar.MINUTE, 15);
        cal.set(Calendar.SECOND, 4);

        alarmManager.setExact(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), broadcast);
        }
    }
}

然后在你的清单中..

<receiver android:name=".RebootReceiver">
<intent-filter>
  <action android:name="android.intent.action.BOOT_COMPLETED" /> 
  <action android:name="android.intent.action.QUICKBOOT_POWERON" /> 
  <category android:name="android.intent.category.DEFAULT" /> 
  </intent-filter>
  </receiver>

如何创建即使在 phone 重启后也始终运行的通知？

How to create a notification that always run even after phone reboot?

notifications

android

broadcastreceiver

bootcompleted

firebase-realtime-database

如何创建即使在 phone 重启后也始终 运行 的通知？

How to create a notification that always run even after phone reboot?

notifications

android

broadcastreceiver

bootcompleted

firebase-realtime-database

如何创建即使在 phone 重启后也始终运行的通知？