Fragment lifecycle - which method is called upon show / hide?

Fragment lifecycle - which method is called upon show / hide?

fragment lifecycle onviewcreated
fragment lifecycle methods
activity and fragment lifecycle
onhiddenchanged fragment
fragment onresume
fragment ondestroyview
fragment backstack lifecycle
android show fragment

I am using the following method to switch between Fragments (in my NavigationDrawer) by showing / hiding them.

protected void showFragment(int container, Fragment fragment, String tag, String lastTag, boolean addToBackStack ) {

        FragmentManager fragmentManager = getSupportFragmentManager();
        FragmentTransaction transaction = fragmentManager.beginTransaction();

        if ( lastTag != null && !lastTag.equals("")) {
            Fragment lastFragment = fragmentManager.findFragmentByTag( lastTag );
            if ( lastFragment != null ) {
                transaction.hide( lastFragment );
            }
        }

        if ( fragment.isAdded() ) {
            transaction.show( fragment );
        }
        else {
            transaction.add( container, fragment, tag );
        }

        if ( addToBackStack ) {
            transaction.addToBackStack( tag );
        }

        transaction.commit();

        // set the active tag
        activeFragTag = tag;
    }

What I am unclear about is which method of the Fragments lifecycle is called when I show or hide it? (since there is no method such as onShow() or onHide() im not quite sure what to use). I want to perform specific actions upon showing and hiding a certain Fragment.


Similar to activity lifecycle, Android calls onStart() when fragment becomes visible. onStop() is normally called when fragment becomes invisible, but it can also be called later in time.

Depending on your layout Android can call onStart() even, when your Fragment is not yet visible, but it belongs to a visible parent container. For instance, this is valid for android.support.v4.view.ViewPager which requires you to override Fragment.setUserVisibleHint() method. In any case, if you need to register/unregister BroadcastReceivers or other listeners, you can safely use onStart() and onStop() methods because those will be called always.

Note: Some fragment containers can keep invisible fragments started. To handle this situation you can override Fragment.onHiddenChanged(boolean hidden). According to the documentation, a fragment must be both started and visible (not hidden), to be visible to the user.

Update: If you use android.support.v4.widget.DrawerLayout then a fragment below the drawer stays started and visible even when drawer is open. In this case you need to use DrawerLayout.setDrawerListener() and listen for onDrawerClosed() and onDrawerOpened() callbacks.

What is the first method called in the lifecycle of a fragment in , Which method is called only once in a fragment lifecycle? onStart(): The onStart() method is called once the fragment gets visible onPause() : The system calls this method as the first indication that the user is leaving the fragment. This is usually where you should commit any changes that should be persisted beyond the current user session


I @Override this method and resolve my problem:

@Override
public void onHiddenChanged(boolean hidden) {
    super.onHiddenChanged(hidden);
    if (hidden) {
        //do when hidden
    } else {
       //do when show
    }
}

What are the differences between activity and fragment?, Which callback method is called when the fragment's user interface becomes visible but is not yet active? Fragment lifecycle - which method is called upon show / hide? android android-fragments lifecycle fragmenttransaction asked Aug 22 '13 at 8:30 stackoverflow.com


of course you can @Override the following method to do so:

@Override
    public void setUserVisibleHint(boolean isVisibleToUser) {
        super.setUserVisibleHint(isVisibleToUser);
        if (isVisibleToUser) {
            // Do your Work
        } else {
            // Do your Work
        }
    }

Android Fragments and its Lifecycle, 3.0 which API version 11 to support flexible UI on large screens. I was able to pass data to Activity with interface, but unable to update date as fragment is already created. looking Fragment life cycle I was hopeful that onStart() will help me to update data when that particular Fragment is displayed.


Fragment in view pager behaviour is different with regular fragment container.

Try this code:

    boolean mIsVisibleToUser;

    /**
     * is visible to user
     */
    public void show() {
        //do when show
    }

    /**
     * is invisible to user
     */
    public void hide() {
        //do when gone
    }

    @Override
    public void onResume() {
        super.onResume();
        if (!mIsVisibleToUser && getUserVisibleHint()) {
            mIsVisibleToUser = true;
            show();
        }
    }

    @Override
    public void onPause() {
        super.onPause();
        if (mIsVisibleToUser && getUserVisibleHint()) {
            mIsVisibleToUser = false;
            hide();
        }
    }

    @Override
    public void setUserVisibleHint(boolean isVisibleToUser) {
        super.setUserVisibleHint(isVisibleToUser);
        if (isResumed()) {
            if (mIsVisibleToUser != isVisibleToUser) {
                mIsVisibleToUser = isVisibleToUser;
                if (isVisibleToUser) show();
                else hide();
            }
        }
    }

    public boolean isVisibleToUser() {
        return mIsVisibleToUser;
    }

FragmentStateChanger with show/hide does not trigger proper , I am using the following method to switch between Fragments (in my NavigationDrawer) by showing / hiding them. protected void showFragment(int container,  99 Fragment lifecycle - which method is called upon show / hide? 98 How to add a fragment to a programmatically generated layout? View more network posts →


Try this code:

@Override
public void setUserVisibleHint(boolean visible)
{
    super.setUserVisibleHint(visible);
    if (visible && isResumed())
    {
         onResume();
    }
}

@Override
public void onResume()
{
    super.onResume();
    if (!getUserVisibleHint())
    {
        return;
    }

    //Add your code this section
}

1.2: Fragment lifecycle and communications · GitBook, This called lifecycle methods properly (up to onStart/onStop) but will destroy the fragment view. In the MVVM sample, the state changer uses  onDestroyView() is called when fragment's view is being destroyed, but the fragment is still kept around. onDestroy() is called when fragment is no longer in use. onDetach() is called when fragment is no longer connected to the activity. The lifecycle execution order is mapped out below:


FragmentTransaction, Within the Fragment lifecycle callback methods, you can declare how your Fragment for the Activity results in a similar callback for each Fragment , as shown in the The onActivityCreated() method is called after onCreateView() and before  BUT the ViewPager creates the second fragment when the first is visible in order to cache the second fragment and makes it visible when the user starts swiping. So the onResume() event is fired in the second fragment long before it becomes visible.


DialogFragment, Set the short title to show as a bread crumb when this transaction is on the back removed or hidden Fragment to a View from a shown or added Fragment. If addToBackStack has already been called, this method will throw  I use that method for refreshing data on fragment. if you need update or show your data you need check getView() on setUserVisibleHint, if is null, so onCreateView not called yet, and you can use that method from onCreateView(); for first lunch or jumping some fragment, then change one Boolean value to Prevent duplicate calling method, i Hope this useful for you ( put refresh method in onCreateView and setUserVisibleHint) – Shayan Pourvatan Jun 11 '14 at 11:11


Android Fragments Common Queries & Common Mistakes , Control of the dialog (deciding when to show, hide, dismiss it) should be done This method will be invoked when the dialog is canceled. Android fragment lifecycle is affected by activity lifecycle because fragments are included in activity. Each fragment has its own life cycle methods that is affected by activity life cycle because fragments are embedded in activity. The FragmentManager class is responsible to make interaction between fragment objects.