[Android] [Warning] Activity not started, its current task has been brought to the front

ActivityManager: Warning: Activity not started, its current task has been brought to the front

The action you should take:
No need to do anything,the task have showed at the Emulator.
This warning is just for warn you the old task in your emulator will be covered by the new task.

If you want to disable this warning next time,
you can close your emulator that started before you run a new one.
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我的情況﹕Emulator 已開及已運行一些程序，
在未關閉舊Emulator的情況下再重新開啟Emulator，

彈這個警告出來是警告你﹕「在Emulator的舊task會被新task覆蓋」而已 ^^
Emulator 依然可以照常運作的，不影響執行，不用理會。