请教下Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED
什么情况下会reset？
按Home键回到系统桌面 再点击系统桌面的快捷方式好像就是以这种flag启动应用程序的，一般这时不会reset
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If set, and this activity is either being started in a new task or bringing to the top an existing task, then it will be launched as the front door of the task. This will result in the application of any affinities needed to have that task in the proper state (either moving activities to or from it), or simply resetting that task to its initial state if needed.
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设置no-history 就不会保存了