hello,xtablayout fragment 出错 #4
Description
public class HomeFragment extends Fragment {
private View viewContent;
private XTabLayout tabLayout;
private ViewPager viewPager;
private BadgeView redDotBadgeView;
private BadgeView redNumberBadgeView;
private String[] strArray = new String[]{"关注", "推荐", "视频", "直播", "图片", "段子", "精华", "热门"};
private List<String> stringList = new ArrayList<>();
private List<Fragment> fragmentList = new ArrayList<>();
// private ViewPager viewPager;
// private XTabLayout topTabLayout;
// private BadgeView redDotBadgeView;
// private BadgeView redNumberBadgeView;
//
// private String[] strArray = new String[]{"关注", "推荐", "视频", "直播", "图片", "段子", "精华", "热门"};
//
// private List stringList = new ArrayList<>();
// private List fragmentList = new ArrayList<>();
//
public static HomeFragment instance() {
HomeFragment instance = new HomeFragment();
return instance;
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
viewContent = inflater.inflate(R.layout.fragment_home, container, false);
initData();
initViews();
return viewContent;
}
private void initViews() {
tabLayout = viewContent.findViewById(R.id.tabsFive);
viewPager = viewContent.findViewById(R.id.viewPager);
initData();
IndexPagerAdapter indexPagerAdapter = new IndexPagerAdapter(getFragmentManager(),stringList,fragmentList);
viewPager.setAdapter(indexPagerAdapter);
viewPager.setAdapter(indexPagerAdapter);
tabLayout.setupWithViewPager(viewPager);
tabLayout.setSelectedTabIndicatorHeight(0);
}
private void initData() {
stringList.addAll(Arrays.asList(strArray));
fragmentList.add(new HomeFragment());
fragmentList.add(new EmptyFragment());
fragmentList.add(new EmptyFragment());
fragmentList.add(new EmptyFragment());
fragmentList.add(new EmptyFragment());
fragmentList.add(new EmptyFragment());
fragmentList.add(new EmptyFragment());
fragmentList.add(new EmptyFragment());
}
class IndexPagerAdapter extends FragmentPagerAdapter {
private List<String> titleList;
public IndexPagerAdapter(FragmentManager fm, List<String> titleList, List<Fragment> fragmentList) {
super(fm);
this.titleList = titleList;
}
@Override
public Fragment getItem(int position) {
return fragmentList.get(position);
}
@Override
public int getCount() {
return titleList.size();
}
@Override
public CharSequence getPageTitle(int position) {
return titleList.get(position);
}
}
public static int dip2px(Context context, float dpValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dpValue * scale + 0.5f);
}
}
NullPointerException: Attempt to invoke virtual method 'void android.support.v4.app.Fragment.setMenuVisibility(boolean)' on a null object reference