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POAvoid google maps requests until fragment is visible with ViewPager
 

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  1. POAvoid google maps requests until fragment is visible with ViewPager
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    <p>I am using ViewPager with three Fragment. One of this fragment (<strong>MapFragment</strong>) use google maps Api v2. </p> <pre><code>public class ViewPagerAdapter extends FragmentStatePagerAdapter{ public static final int NUM_PAGES = 3; public static final int [] titles = {R.string.map, R.string.bus_stop_favorites, R.string.bus_lines}; private Context context; public ViewPagerAdapter(Context context, FragmentManager fragmentManager) { super(fragmentManager); this.context = context; } @Override public Fragment getItem(int position) { switch (position) { case 0: return new MapFragment(); case 1: return new FavoritesFragment(); case 2: return new LinesFragment(); default: throw new IllegalArgumentException("La posicion fue " + position + " y deberia ser menor a " + NUM_PAGES); } } @Override public int getCount() { return NUM_PAGES; } @Override public CharSequence getPageTitle(int position) { return context.getString(titles[position]); } } </code></pre> <p>When i run my application, i set fragment 1 (<strong>FavoriteFragment</strong>) like default so it 's the first that i see. </p> <pre><code> @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.application_tus); initActionBar(); viewPager = (ViewPager) findViewById(R.id.viewpager); viewPager.setAdapter(new ViewPagerAdapter(this, getSupportFragmentManager())); TitlePageIndicator titleIndicator = (TitlePageIndicator)findViewById(R.id.titles_viewpager); titleIndicator.setViewPager(viewPager,1); } } </code></pre> <p>MapFragment is sibling of FavoriteFragment so It is loaded when my app start and a Google Map API request is done. However Google Maps API has a limit of quota so I like that MapFragment ONLY do Google Map API request when It is visible and If users don't swipe left , MapFragment doesn't be visible and any request is done.</p> <p>This image show the three Fragments On ViewPager</p> <p><img src="https://i.stack.imgur.com/RXxQ9.jpg" alt="enter image description here"></p>
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