public void setViewPager(ExtendedViewPager pager) {
final PagerAdapter adapter = pager.getAdapter();
if (adapter == null) return;
// throw new IllegalStateException("ViewPager has not been bound.");
if (!(adapter instanceof TitleProvider))
throw new IllegalStateException(
"ViewPager adapter must implement TitleProvider to be used with TitlePageIndicator.");
mViewPager = pager;
pager.setOnPageChangeListener(this);
notifyDataSetChanged();
}
public void notifyDataSetChanged() {
if (mTabLayout == null || mViewPager == null) return;
mTabLayout.removeAllViews();
mAdapter = (TitleProvider) mViewPager.getAdapter();
if (mAdapter == null) return;
final int count = ((PagerAdapter) mAdapter).getCount();
for (int i = 0; i < count; i++) {
final String title = mAdapter.getTitle(i);
final Drawable icon = mAdapter.getIcon(i);
if (title != null && icon != null) {
addTab(title, icon, i);
} else if (title == null && icon != null) {
addTab(icon, i);
} else if (title != null && icon == null) {
addTab(title, i);
}
}
if (mSelectedTabIndex > count) {
mSelectedTabIndex = count - 1;
}
setCurrentItem(mSelectedTabIndex);
requestLayout();
}