Adding a Fragment with add() method doesn't hide previous fragments

问题

I'm experiencing "unexpected behaviour" when using add() method to add a new fragment.

I want to add a new fragment on a FrameLayout, but when I do it the previous fragment stills visible.

• Is this the expected result when using add() method?

• It is because I am using a FrameLayout and add() method just place a fragment over the FrameLayout without affect the previous one?

Thx

回答1:

Not a bug. Try replace(..). instead adding to the back stack if required.

EDIT I think that using replace or remove() add() will solve your problem but as you highlight in your related post there is a bug which manifests itself under your particular set of circumstances.

回答2:

Other simple thing what you can do is to call

FragmentTransaction t = getFragmentManager.beginTransaction();
t.hide(<your_fragment>);
t.add(<container, <new_fragment>);
..do the rest here..
t.commit();

Let me know if this helps.

来源：https://stackoverflow.com/questions/6228401/adding-a-fragment-with-add-method-doesnt-hide-previous-fragments