通过PendingIntent调用的活动会自动销毁(Activity called via PendingIntent getting destroyed automatically)

 我有一个活动 ，在清单中设置了以下特殊属性 
 
<activity
        android:name=".LightUp"
        android:excludeFromRecents="true"
        android:launchMode="singleInstance"
        android:noHistory="true"
        android:process=":listener"
        android:taskAffinity="" >
    </activity>
 
 在这个活动中，我安排了一个AlarmManager来使用这个PendingIntent在某个时间之后调用它自己。 AlarmManager是必要的，因为电话会在屏幕上显示此活动时进入睡眠状态，而我不想持有唤醒锁。 
 
pendingIntent = PendingIntent.getActivity(this, 10,
                new Intent(this, LightUp.class)
                .setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT),
                PendingIntent.FLAG_UPDATE_CURRENT);
 
 所以当Alarm manager触发时，我像往常一样在onNewIntent（）函数中获得新的Intent。 这意味着即将进行同样的活动。 问题是活动在onNewIntent之后被破坏。 即使我在onNewIntent中完全没有代码，我仍可以从日志中看到onDestroy无论如何都会被调用。 
 
 所以问题是为什么Destroy被召唤？ 我该怎么做才能让活动继续运行？ 

I have an Activity with following special properties set in manifest
 
<activity
        android:name=".LightUp"
        android:excludeFromRecents="true"
        android:launchMode="singleInstance"
        android:noHistory="true"
        android:process=":listener"
        android:taskAffinity="" >
    </activity>
 
Inside this activity, I'm scheduling an AlarmManager to use this PendingIntent to call itself after sometime. AlarmManager is necessary because phone will go to sleep while this activity is on screen, and I don't want to hold a wakelock.
 
pendingIntent = PendingIntent.getActivity(this, 10,
                new Intent(this, LightUp.class)
                .setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT),
                PendingIntent.FLAG_UPDATE_CURRENT);
 
So when Alarm manager fires, I'm getting the new Intent in onNewIntent() function as usual. Which means intent is coming to same activity. Problem is the activity gets destroyed after onNewIntent. Even if I have absolutely no code in onNewIntent, I can see from logs that onDestroy is getting called anyway.
 
So question is why is Destroy being called? What can I do to keep the activity running?

原文：https://stackoverflow.com/questions/32912291