由网友(喂，我好饿)分享简介：我有一个名为MainActivity的活动。该活动将启动，有打开这个MainActivity一个PendingIntent的通知。I have an activity called MainActivity. This activity launches a notification that has a Pendi...

我有一个名为MainActivity的活动。该活动将启动，有打开这个MainActivity一个PendingIntent的通知。

I have an activity called MainActivity. This activity launches a notification that has a PendingIntent that opens this MainActivity.

因此​​，要关闭应用程序，我有两次单击后退按钮。我想建立活动为单身。我试图设置singleInstance或singleTask来体现，但是这并不工作。

So, to close the application, I have to click the back button twice. I would like to set up activity as singleton. I tried to set singleInstance or singleTask to manifest but this doesn't work.

推荐答案

singleInstance 和 singleTask 不建议一般使用。

尝试：

 android:launchMode="singleTop"

有关详细信息，请参阅 launchMode部分

For more information please refer to launchMode section of the Activity element documentation.

在除previous引用您还应该阅读任务，回到堆栈

In addition to the previous reference you should also read tasks and back stack