Android导航抽屉：从通知中打开深度片段

Question

first sorry for my rusty English !

This is a doubt I have had for some time now and although my skills on Android have been getting better I haven't found an elegant solution for this issue:

Lets say an application uses the Navigation Drawer pattern and has three levels of navigation: Home -> Posts -> Post details

When I open the App from the launcher I add the Home Fragment. From here the user can navigate all the way down to a given "post" using fragment transactions.

Now imagine there is some kind of notification that is letting me know something happened on a specific post: How would you create a "synthetic" back-stack when opening the app from the notification ? What I mean is:

1- Open the app from the notification

2- The app opens on Post Details

3- Back navigation has to be > Posts > Home

Thanks a lot in advance !

Answer 1

without any line of code its hard to say how you are setting these Fragment s , but you may need addToBackStack method or consider @Override onBackPressed properly. assuming notification is yours you can set id or whatever you need inside PendingIntent extras Bundle , obtain inside OnCreate method and then create a stack