FragmentPagerAdapter中getPageTitle方法未被调用

Question

我有一个FragmentPagerAdapter，它负责获取当前的片段，跟踪选项卡数并为每个选项卡设置选项卡标题。

public class ClothingSectionsPagerAdapter extends FragmentPagerAdapter {

    private String[] mCategories;

    public ClothingSectionsPagerAdapter(FragmentManager fm) {
        super(fm);
    }

    public void setContext(Context context) {
        mCategories = context.getResources().getStringArray(R.array.category);
    }

    @Override
    public Fragment getItem(int position) {
        return ClothingCategoryFragment.newInstance(mCategories[position]);
    }

    @Override
    public int getCount() {
        return mCategories.length;
    }

    @Override
    public CharSequence getPageTitle(int position) {
        Log.d("getPageTitle", mCategories[position]);
        return mCategories[position];
    }
}

在我的活动中，我像这样实现了这个类。

ClothingSectionsPagerAdapter sectionsPagerAdapter =
                new ClothingSectionsPagerAdapter(getSupportFragmentManager());

sectionsPagerAdapter.setContext(this);
mViewPager.setAdapter(sectionsPagerAdapter);
mViewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(mTabLayout));
mTabLayout.addOnTabSelectedListener(new TabLayout.ViewPagerOnTabSelectedListener(mViewPager));
mViewPager.setCurrentItem(startingFragmentPosition);

然而当我运行我的应用时，选项卡存在但没有标题。 getPageTitle 方法从未被调用。我该如何解决这个问题？

- Tom Finet

---

tabLayout.setupWithViewPager(viewPager); - Goku

Answer 1

试试这个

mTabLayout.setupWithViewPager(mViewPager);

- Goku