android tab标签不显示,android – TabLayout选项卡文本不显示

我在片段中使用TabLayout来显示三个固定的选项卡，并且选项卡正在运行，但即使在设置该应用程序后，它也不显示选项卡文本：tabTextColor属性仍然不可见。

NewFragment.java

public class NewFragment extends Fragment {

private RecyclerView mRecyclerView;

private RecyclerView.LayoutManager mLayoutManager;

private RecyclerView.Adapter mAdapter;

@Override

public View onCreateView(LayoutInflater inflater, ViewGroup container,

Bundle savedInstanceState) {

View inflatedView = inflater.inflate(R.layout.new_fragment, container, false);

TabLayout tabLayout = (TabLayout) inflatedView.findViewById(R.id.tabLayout);

tabLayout.addTab(tabLayout.newTab().setText("Tab 1"));

tabLayout.addTab(tabLayout.newTab().setText("Tab 2"));

tabLayout.addTab(tabLayout.newTab().setText("Tab 3"));

final ViewPager viewPager = (ViewPager) inflatedView.findViewById(R.id.viewpager);

LinearLayoutManager mLayoutManager = new LinearLayoutManager(getActivity());

mLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);

viewPager.setAdapter(new PagerAdapter(getFragmentManager(), tabLayout.getTabCount()));

viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));

tabLayout.setupWithViewPager(viewPager);

tabLayout.setTabMode(TabLayout.MODE_FIXED);

tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {

@Override

public void onTabSelected(TabLayout.Tab tab) {

viewPager.setCurrentItem(tab.getPosition());

}

@Override

public void onTabUnselected(TabLayout.Tab tab) {

}

@Override

public void onTabReselected(TabLayout.Tab tab) {

}

});

return inflatedView;

}

public class PagerAdapter extends FragmentStatePagerAdapter {

int mNumOfTabs;

public PagerAdapter(FragmentManager fm, int NumOfTabs) {

super(fm);

this.mNumOfTabs = NumOfTabs;

}

@Override

public Fragment getItem(int position) {

switch (position) {

case 0:

return new FragmentTab();

case 1:

return new FragmentTab();

case 2:

return new FragmentTab();

default:

return null;

}

}

@Override

public int getCount() {

return mNumOfTabs;

}

}

}

newfragment.xml

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

xmlns:app="http://schemas.android.com/apk/res-auto"

tools:context=".NewFragment">

android:id="@+id/tabLayout"

android:layout_width="match_parent"

android:layout_height="wrap_content"

app:tabMode="fixed"

app:tabTextColor="#ffffff"

app:tabGravity="fill"

app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"/>

android:id="@+id/viewpager"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:background="@android:color/white"/>