Renaud Favier Renaud Favier - 3 months ago 11
Android Question

How to detect a click on an already selected tab in TabLayout

My question has been answered several times when it's a

TabActivity
with
tabWidgets
. But I couldn't find anything about the relativly new
TabLayout
view.

It's quite simple, like facebook, I want a tap on an already selected tab to get my list to scroll up til its beggining. but I can't figure out where to put my listener.

I tried on the
TabLayout
itself,
mTabLayout.getChildAt()
and on
TabLayout.getTabAt().getCustomView()
.




EDIT : Correction :
As CommonsWare mentionned in the comment of its answer, I had to rewrite the behaviour of "onTabSelected".

mTabLayout = (TabLayout) findViewById(R.id.tabs);
mTabLayout.setupWithViewPager(mViewPager);

for (int i = 0; i < mTabLayout.getTabCount(); i++) {
mTabLayout.getTabAt(i).setIcon(tabIcons[i]);
}

mTabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
mViewPager.setCurrentItem(tab.getPosition());
}

@Override
public void onTabUnselected(TabLayout.Tab tab) {

}

@Override
public void onTabReselected(TabLayout.Tab tab) {
if (tab.getPosition() == PAGE_FEED) {
((PagerNewsFeedFragment) mViewPagerAdapter.getRegisteredFragment(PAGE_FEED)).scrollToTop();
}
}
});





Thanks !

Answer

Based on spending ~10 seconds reading the documentation... call setOnTabSelectedListener() on the TabLayout. Pass in an OnTabSelectedListener implementation. Your event callback method is onTabReselected().