Is Android's FragmentTransaction.commit() Method Thread Safe?

Question

I'm just curious about whether or not I have to call this on the UI-Thread or not. According to the documentation, the commit is run on the UI-thread further on in the future, when it has time to do so. If this is the case, can I run FragmentTransaction.commit() on another thread?

Answer 1

This question is a year old but I wanted to address it because I suspect it's an issue that a lot of people will encounter.

Working with FragmentTransactions, including calling the commit method, is safe to do on non-UI threads because none of the work that occurs within the FragmentTransaction directly manipulates the UI. The method calls on the FragmentTransaction are simply packaged up as a list of instructions of work to be performed.

Once you call the commit method, that package of instructions is then sent over to the UI thread for processing.