CODEWITHSUNDEEP
androidandroid-fragments
Jono
Jono

Reputation: 18108

Android fragments wont show

i have a piece of code where i wish to just hide the current fragment so it doesnt destroy its view and then show a new one using this :

  FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
    ft.hide(oldFragment);
    ft.show(newFragment);
    ft.commit();

The issue is that when i execute the above code, it doesnt show any UI components.

if i do ft.replace(id,fragment); it works but i do not want to remove the previous displayed fragment as i want to maintain the fragments and its views so i dont need to re-initialise it

Upvotes: 0

Views: 289

Answers (2)

positivevibesonly
positivevibesonly

Reputation: 3147

Was your fragment initialized before calling this? 

if (newFragment == null) {
    // If not, instantiate and add it to the activity
    ft.add(yourFragmentContainerId, newFragment,"tag");
} else {
    // If it exists, simply attach it in order to show it
    ft.show(newFragment);
}

Upvotes: 1

Sam Dozor
Sam Dozor

Reputation: 40734

Did you previously add newFragment to some part of your Activity's view hierarchy? If you just instantiate a Fragment and tell it to show, it won't know where to show (unless it's a DialogFragment, I guess). You need to use add(somelayoutid,fragment,"sometag") for each Fragment and then you can hide/show them as you'd like. You can also just continually use replace, rather than hide/show, if you don't need to keep your Fragment's around while they're hidden.

"sometag" will be useful if you're handling rotation so you can retrieve a reference to each Fragment after your Activity is recreated, and then you can hide/show them as before.

Upvotes: 1

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