BackStack android片段

Question

How to popBackStack fragments by tag like this:

• [c]
• [b]
• [a]

If findByTag [b] is exist then clear all elements of stack which are above of current fragment.

• [b]
• [a]

else If findByTag [d] does not exist then

• [d]
• [c]
• [b]
• [a]

Answer 1

I can only guess what you question is. Here is a link to Google's Tasks and Back Stack guide for you that might help.