重启设备时，Android alarmmanager通知无法正常工作

Question

我创建了一个Android应用程序，可以在应用程序启动五分钟后显示通知。从设备重新启动弹出通知是应用程序的特定任务。我使用BroadcastReceiver，Service＆amp; AlaramManager执行上述任务。设备处于活动状态时，此功能正常。这在重新启动设备但在5分钟之前生成通知时有效。

例如，我计划在每5分钟后显示此通知。然后我启动了该应用程序。在五分钟之前，我重新启动了设备。我在五分钟之前和设备重启后收到通知。

但我的期望是，在设备重启后五分钟后收到通知。

以下是我要遵循的步骤。

MainActivity.java

public class MainActivity extends AppCompatActivity {

    private Context context;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        this.context=this;

        startService(new Intent(getBaseContext(), MyService.class));

    }
}

MyService.java

public class MyService extends Service {

    @Override
    public IBinder onBind(Intent arg0) {
        return null;
    }


    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        // Let it continue running until it is stopped.


        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.MINUTE, 5);
        intent = new Intent(MyService1.this, AlarmReceiver.class);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(MyService1.this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
        AlarmManager am = (AlarmManager) MyService1.this.getSystemService(MyService1.this.ALARM_SERVICE);
        am.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime() + 1000 * 60 * 5, pendingIntent);


        return START_STICKY;
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        Toast.makeText(this, "Service Destroyed", Toast.LENGTH_LONG).show();
    }

}

AlarmReceiver.java

public class AlarmReceiver extends BroadcastReceiver{
    private int MID = 0;

    public static boolean isCreated;

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub

        if(intent.getAction().equals("android.intent.action.BOOT_COMPLETED")){

            long when = System.currentTimeMillis();
            NotificationManager notificationManager = (NotificationManager) context
                    .getSystemService(Context.NOTIFICATION_SERVICE);

            Intent notificationIntent = new Intent(context, MainActivity.class);
            notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

            PendingIntent pendingIntent = PendingIntent.getActivity(context, 0,
                    notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);

            Uri alarmSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);

            NotificationCompat.Builder mNotifyBuilder = new NotificationCompat.Builder(
                    context).setSmallIcon(R.mipmap.ic_launcher)
                    .setContentTitle("Alaram Fired")
                    .setContentText("Events To be Performed").setSound(alarmSound)
                    .setAutoCancel(true).setWhen(when)
                    .setContentIntent(pendingIntent)

                    .setVibrate(new long[]{1000, 1000, 1000, 1000, 1000});
            notificationManager.notify(MID, mNotifyBuilder.build());
            MID++;

        }
    }
}

的AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.agent_app.mynotification">

    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <service android:name=".MyService"/>
        <receiver android:name="com.agent_app.mynotification.AlarmReceiver" android:enabled="true" android:exported="false"
            android:permission="android.intent.action.BOOT_COMPLETED">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED"/>
            </intent-filter>
        </receiver>

        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>

</manifest>

有没有iedas？

谢谢。