求android老手指导。。

[dai_jiawei]

我在一个Acitivity里面写了多个Fragment.。有好几层的fragment在跳转，但是我一按手机上的回退键就把当前的Activity关掉了，也就是fragment全部都被关掉了。我想实现当按回退的时候返回到上一个fragment。。请问能否实现？该如何实现？

[svenwang]

能。 让每个fragment对应不同的activity。

[西兰花不蓝]

重写返回键的回调方法不行么？

[DamonZH]

Before you call commit(), however, you might want to call addToBackStack(), in order to add the transaction to a back stack of fragment transactions. This back stack is managed by the activity and allows the user to return to the previous fragment state, by pressing the Back button.

[dai_jiawei]

引用 3 楼 DamonZH 的回复:

Before you call commit(), however, you might want to call addToBackStack(), in order to add the transaction to a back stack of fragment transactions. This back stack is managed by the activity and allows the user to return to the previous fragment state, by pressing the Back button.

我自己写了一个回退的按钮，那我要怎样让我点击它的时候它也是返回上一个fragment而不是把activity finish掉呢

[Kifile]

何必能, fragment 原生就支持返回逻辑的,只要你在 commit()之前调用 addBackStack(),如果没有记错,是这一个函数吧,

[Kifile]

引用 4 楼 dai_jiawei 的回复:

引用 3 楼 DamonZH 的回复:

Before you call commit(), however, you might want to call addToBackStack(), in order to add the transaction to a back stack of fragment transactions. This back stack is managed by the activity and allows the user to return to the previous fragment state, by pressing the Back button.

我自己写了一个回退的按钮，那我要怎样让我点击它的时候它也是返回上一个fragment而不是把activity finish掉呢

获取 Fragment 的 Trasaton, 然后调用他的弹出函数,具体函数你可以查一下

[罗博士]

支持3楼和5楼。