StackOverflow2013

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POFragment constantly updated
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copied!<p>I've got a FragmentActivity when I instantiate three different (n, n+1, n+2) Fragments. I need to keep each Fragment updated when user swipes to it, so I used <em>ViewPager.SimpleOnPageChangeListener.onPageSelected</em> in the Fragment Activity, so when user swipes to n+1 or n+2 Fragment and again to n that function update the content. Without using this workaround if I'm in the Fragment n+1, both n and n+2 are already loaded! I'd like instead that the Fragment load when the user swipes to it, without "pre-load".</p> <p>This workaround works fine for me but it has a problem: the n Fragment that is the first in the list at start up of the app doesn't load its content. To load its content I have to swipe to n+1 then go back to n.</p> <p>I know that the content of the Fragment should be setted on the class called at the moment of instantiate the fragment and that extends Fragment class, but in this way I don't know how to keep up to date each Fragment, as I do using <em>onPageSelected</em>.</p> <p>Any suggestions?</p> <p><strong>EDIT 1:</strong> I istantiate my fragments in this way in <em>onCreate()</em>:</p> <pre><code> for(int x = 0; x < 3; x++) { Bundle b = new Bundle(); b.putString( "id" , x ); Fragment myFrag = Fragment.instantiate( myContext , Mm_FragmentPage.class.getName() ); myFrag.setArguments( b ); fragments.add(myFrag); } </code></pre> <p>Then I set the adapter in the <em>ViewPager</em>:</p> <pre><code> mPagerAdapter = new PagerAdapter( super.getSupportFragmentManager() , fragments ); mPager.setAdapter( mPagerAdapter ); </code></pre> <p>Then I use the adapter in the <em>TitlePageIndicator</em></p> <pre><code> titleIndicator = (TitlePageIndicator) findViewById( R.id.titleFragments ); titleIndicator.setViewPager( mPager ); titleIndicator.setOnPageChangeListener( new myPageChangeListener() ); </code></pre> <p>And, at the end, the class <em>PagerAdapter</em>:</p> <pre><code>public class PagerAdapter extends FragmentPagerAdapter { // fragments to instantiate in the viewpager private List<Fragment> fragments; // constructor public PagerAdapter(FragmentManager fm, List<Fragment> fragments) { super(fm); this.fragments = fragments; } // return access to fragment from position, required override @Override public Fragment getItem(int position) { return this.fragments.get(position); } // number of fragments in list, required override @Override public int getCount() { return this.fragments.size(); } @Override public CharSequence getPageTitle(int position) { return getResources().getStringArray( R.array.tab_header_name )[ position ]; } } </code></pre>

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