在Android的SherlockFragmentActivity的SherlockFragment中未调用onResume（）吗？

Question

I am working in an application in which I have used the Sherlock Fragment API.

I am having 6 SherlockFragments for making 6 different screens. Now when my application is launched, initially the onResume for all the fragments are called at once.

I am in a need of a method like in activity we use onResume for moving from one Fragment to another Fragment. I have to call a web service method when I move from one fragment to another fragment.

I tried to use the onResume here, but when I move from 1st to 2nd fragment, then the onResume of the 3rd fragment is called. Alternate fragment is called when we move from one fragment to then next.

Please suggest me, which method should I use to call my web service when I move from 1 fragment to next fragment.

EDITED : My actual requirement is to have an event which is called when we a Fragment is visible to user. At that event I have to call service for getting updated data.

Answer 1

The onResume method is tied to the Activity . If you're moving back and forth between Fragments attached to a common Activity , onResume won't be called again. However, if you were to press back or navigate away from this Activity and then come back, onResume would be called.

You might consider onAttach .

Answer 2

You can use this way for fix this issue. Actually I was also facing same problem in my application. I was using FragmentPagerAdapter for show multiple tab in ViewPager. I have just hide and show fragment on TabSelection with notifyDataChanged() method for refresh adapter.

My code:

/** Creating an instance of FragmentPagerAdapter */
final MyFragmentPagerAdapter fragmentPagerAdapter = new MyFragmentPagerAdapter(fm);

/** Setting the FragmentPagerAdapter object to the viewPager object */
_mPager.setAdapter(fragmentPagerAdapter);
_mActionBar.setDisplayShowTitleEnabled(false);

/** Defining tab listener */
ActionBar.TabListener tabListener = new ActionBar.TabListener() {

@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {

            ft.hide(fragmentPagerAdapter.getItem(tab.getPosition()));
            fragmentPagerAdapter.notifyDataSetChanged();
            _mPager.setAdapter(fragmentPagerAdapter);
        }

        @Override
    public void onTabSelected(Tab tab, FragmentTransaction ft) {
            _mPager.setCurrentItem(tab.getPosition());

        ft.show(fragmentPagerAdapter.getItem(tab.getPosition()));
            fragmentPagerAdapter.notifyDataSetChanged();
            _mPager.setAdapter(fragmentPagerAdapter);
        }

        @Override
        public void onTabReselected(Tab tab, FragmentTransaction ft) {
        }
};

Answer 3

This is worked for me. I've used onStart() rather than using onresume() in sherlockfragmentactivity . And I called to the notifyondatasetchanged .