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POImplementing a "faster" backToTop - ListView
 

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    <p>I have a ListView inside a Fragment, which is added as a tab inside a ViewPager. I want the users to be able to scroll "backToTop" by simply tapping on the Tab they are already on (<strong>onTabReselected()</strong>). I already have a working code to do this; However, the code I use takes too long to scroll back to position 0, which is pretty neat on small lists, but on a 250 song collection it can certainly annoy a user. </p> <p>Here's my code: </p> <pre><code>@Override public void onTabReselected(Tab tab, FragmentTransaction ft) { switch (tab.getPosition()) { case 0: if (tab.getPosition() == mCurPagerItem) { final ListView list = (ListView) findViewById(android.R.id.list); list.smoothScrollToPosition(0); } break; case 1: if (tab.getPosition() == mCurPagerItem) { final GridView list = (GridView) findViewById(R.id.artist_grid); list.smoothScrollToPosition(0); } break; case 2: if (tab.getPosition() == mCurPagerItem) { final ExpandableListView list = (ExpandableListView) findViewById(R.id.exp_list); list.smoothScrollToPosition(0); } break; default: break; } } </code></pre> <p>Where I switch between positons as my different fragments have different "list" types. As I said, this code works certainly well, but is there a faster way to scroll back to top? Something that is more instant that is. </p> <p>And just to clarify, when I say it "takes too long", that is because <strong>smoothScrollToPosition</strong> is in itself a slow way to scroll on the list, supposedly to make it nicer looking. </p> <p><strong>Note</strong> I did try: </p> <pre><code>list.scrollTo(0, 0); </code></pre> <p>but that actually doesn't seem to do anything to the listView's current position. I imagine that is more a View call, that a ListView method itself. </p> <p>Any ideas? </p>
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