How to refresh fragments 'onResume?'

Question

I want to refresh fragments from an Actvitiy. (Let's call the activity A) Activity A contains the fragments.

When I finish Activity B then Activity A should refresh the fragments.

I was thinking this would be done in onResume? I tried simply restarting the activity through an intent but that's not usability friendly.

So how do I refresh fragments when I resume an activity?

What do you mean by "refresh"? Do you mean you want to reload data, or do you mean you want to cause A to be redisplayed, or ? — Peri Hartman, Dec 15 '13 at 18:45
Basically I want to reload data. Because I want to 'restart' the fragments. So the OnCreateView in every fragment is called again. (thus reloading the data in there) — user2883477, Dec 15 '13 at 18:48
I would put the setup code in onStart(). The onCreate() and/or onCreateView() methods will just inflate the layout and wire up the widgets (the findViewById() stuff). — Rick Falck, Dec 15 '13 at 22:17
I just figured out you can use OnStart in fragments... I am new to Android so yeah... Anyhow, thanks! — user2883477, Dec 16 '13 at 13:29

score 14 · Answer 1 · answered Feb 16 '16 at 04:44

14

Just put this code inside

onResume()

For example you want to update your listview when u return to your fregment.

@Override
public void onResume() {
    super.onResume();
    if (allowRefresh)
    {
        allowRefresh = false;
        lst_applist = db.load_apps();
        getFragmentManager().beginTransaction().detach(this).attach(this).commit();
    }
}

Here getFragmentManager().beginTransaction().detach(this).attach(this).commit();

This line detach and re-attach the fragment so your content will be updated.

answered Feb 16 '16 at 04:44

Mehul

2,141
1
15
15

How do I do that from the activity? – Si8 Oct 20 '16 at 10:13
what can i write (this) here – Mahesh Gawhane Nov 30 '17 at 10:17
If you want to move this logic into the Activity, do it inside the [onPostResume()](https://developer.android.com/reference/kotlin/android/app/Activity#onpostresume) method to avoid the [Activity state lost error](https://www.androiddesignpatterns.com/2013/08/fragment-transaction-commit-state-loss.html) – lasec0203 Apr 15 '21 at 06:07
What's missing from this answer are the other locations where you would need to change the value of `allowRefresh`. In this case, in `onPause` it should be `true` and then in`onDestroyView` it should be `false` – lasec0203 Aug 16 '21 at 05:49

score 2 · Answer 2 · edited Aug 05 '19 at 06:27

2

The onResume() get called always before the fragment is displayed. Even when the fragment is created for the first time . So you can simply move your from onViewCreated() to onResume.

@Override
public void onResume() {
super.onResume();

//move your code from onViewCreated() here 

}

edited Aug 05 '19 at 06:27

Tien Duong

2,517
1
10
27

answered Aug 05 '19 at 03:31

Greenkraftz

154
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score 0 · Answer 3 · answered Feb 16 '16 at 04:47

I agree with Mehul But u can alse do it this way .if you want to replace your fragment you could just say

@Override
public void onResume() {
    super.onResume();
    if (allowRefresh)
    {
        allowRefresh = false;
        lst_applist = db.load_apps();
        getFragmentManager().beginTransaction().replace(Fragment_Container,fragment).commit();
    }
}

How to refresh fragments 'onResume?'

3 Answers3

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