Novice about Fragmenttransaction (fallback stack) easy to misunderstand the place

Source: Internet
Author: User

Ashamed to say, at the beginning, I entered the so-called misunderstanding, until today to understand.


So what are the myths?


What do you think is stored in the fragmenttransaction?


At first, I thought it was the last fragment in store.


Now we know what's in there, in fact, a series of operations on the framework.


Why?


You can push back based on the method you added to the fallback stack.


We usually use the following methods to save as a fallback stack:


Fragmentmanager manager = Getfragmentmanager (); Fragmenttransaction transaction = Manager.begintransaction (); Transaction.add (R.id.fragment_container, New Fragment2 ()); Transaction.addtobackstack (null); Transaction.commit ();

The call to the Addtobackstack () method is preceded by commit () after the transaction add action.

If a frame is deposited, then why can't you move it into the stack before adding the action?

Therefore, the deposit in the stack is actually a series of operations on the framework.


-----------------------------------------------------------------------------------------------do not like to spray, welcome to discuss

Novice about Fragmenttransaction (fallback stack) easy to misunderstand the place

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