Call onStart() of Fragment before to display Viewpager, navigation_mode_tabs
android, android-actionbar, android-fragments, android-viewpager
Solution
That is completely normal for a Fragment to go through `onCreateView` then `onStart`. You may want to take a look at the Fragment Lifecycle.
If I understand you correctly when you say "just before it appears", then I think the lifecycle method you are looking for is the `onResume` method. This is the last one to be called before the fragment is active.
Problem
I used a ViewPager and an ActionBar with NavigationMode : "NAVIGATION_MODE_TABS" I put 3 Fragments : Fragment0 (left tab) ,Fragment1 (middle tab),Fragment2(right tab) First, the Fragment0 appears and the methods "onCreateView" and "onStart" are called for Fragment0 AND the Fragment1 If I slide horizontally to go to the "middle tab"(Fragment1), the methods "onCreateView" and "onStart" of Fragment2(right tab) are called... So, I want to know if this is normal ? Because I want to call "onStart" of Fragment2 just before it appears, How do it? My code : ``` public class ActivityPrincipale extends FragmentActivity { private Intent intentService1; private Fragment fragment; [..] private ActionBar.TabListener tabListener; @Override protected void onCreate(Bundle arg0) { super.onCreate(arg0); setContentView(R.layout.viewpager); // Création de la liste de Fragments que fera défiler le PagerAdapter listFragments = new Vector(); // Ajout des Fragments dans la liste des fragments listFragments.add(Fragment.instantiate(this, Fragment0.class.getName())); listFragments.add(Fragment.instantiate(this, Fragment1.class.getName())); listFragments.add(Fragment.instantiate(this, Fragment2.class.getName())); // Création de l'adapter qui s'occupera de l'affichage de la liste de Fragments this.mPagerAdapter = new MyPagerAdapter(super.getSupportFragmentManager(), listFragments); pagerView = (ViewPager) super.findViewById(R.id.viewpager); // affectation de l'adapter au ViewPager pagerView.setAdapter(this.mPagerAdapter); pagerView.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() { @Override public void onPageSelected(int position) { // Quand il y a un swapp entre les page // on selectionne le tab correspondant Log.w("SWAPPING FRAGMENT!!", "swapping de fragment avec comme positin de destination = " + position); getActionBar().setSelectedNavigationItem(position); // DEBUGMODE } }); actionBar = getActionBar(); actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); // Create a tab listener that is called when the user changes tabs. tabListener = new ActionBar.TabListener() { public void onTabSelected(ActionBar.Tab tab, FragmentTransaction ft) { pagerView.setCurrentItem(tab.getPosition()); } public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction ft) { } public void onTabReselected(ActionBar.Tab tab, FragmentTransaction ft) { } }; actionBar.addTab(actionBar.newTab().setText("Frag0").setTabListener(tabListener)); actionBar.addTab(actionBar.newTab().setText("Frag1"").setTabListener(tabListener)); actionBar.addTab(actionBar.newTab().setText("Frag2").setTabListener(tabListener)); } } ``` One Fragment : ``` public class Fragment0 extends Fragment { @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_0, container, false); Log.w("oFragmento", "fragment0"); return rootView; } } ``` My PagerAdapter : ``` public class MyPagerAdapter extends FragmentPagerAdapter { private final List fragments; public MyPagerAdapter(FragmentManager fm, List list_fragments) { super(fm); this.fragments = list_fragments; } @Override public Fragment getItem(int position) { return (Fragment) fragments.get(position); } @Override public int getCount() { return this.fragments.size(); } } ```