了解android导航抽屉和片段

Question

i'm quite new to drawer material and i have trouble understanding some things: I need to create an Activity with a Fragment on it. Different selections on the Drawer must replace the current Fragment with another one, but is the Drawer something in the fragment or it is one for the activity itself. More specifically is the Drawer living in the Fragment and if not is it possible to create it in the Fragment . I am asking this cause i see that when initiating the Drawer you need to fill parent activity. Also when i tried to use the Navigation Drawer template in Android Studio i didn't had the Use a Fragment checkbox.

Answer 1

There are many ways to achieve what you want. But I think the simplest way is:

1) DrawerLayout view should reside in the activity (probably as the base layout).

2) When you click on an item in the draw 2 things happen:

• The fragment is replaced (you have one layout to contain the fragment and you just replace the fragment in it).

• The items inside the drawer update (if you are making a list you would simply set the data and call notifyDataSetChanged() .

Don't forget to save your state so it can recover in case the Activity is recreated.