Android后退按钮就像硬件后退按钮一样

Question

I have an Activitiy with a ListView and some items. When I click on one item I get to the next Activity .

On the new Activity when I click the hardware back button I get back to the Activity with the ListView and all the data is still there.

Using the back button (as defined in AndroidManifest.xml ) in the upper left corner all the data is gone.

How can I make this software back button act like the hardware back button?

Answer 1

您需要在没有listview的activity中覆盖onBackPressed()方法，并在其中检查是否要像超级角色一样（转到上一个活动不做任何事情）或做某事（清除数据），然后调用超级