android中修改tablayout中的字体大小和颜色

<android.support.design.widget.TabLayout
android:id="@+id/tablayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabTextAppearance="@style/MyTabLayoutTextAppearance" />

<style name="MyTabLayoutTextAppearance" parent="TextAppearance.AppCompat.Widget.ActionBar.Title">
<item name="android:textSize">20sp</item>
<item name="android:textColor">@android:color/white</item>
</style>
<style name="MyTabLayoutTextAppearanceInverse" parent="TextAppearance.AppCompat.Widget.ActionBar.Title.Inverse">
<item name="android:textSize">15sp</item>
<item name="android:textColor">@android:color/holo_red_light</item>
</style>

TabLayout tabLayout=(TabLayout)findViewById(R.id.tablayout);
ViewPager viewPager=(ViewPager)findViewById(R.id.viewpager);
if(viewPager!=null)
{
Fragment1 fragment1=new Fragment1();
Fragment2 fragment2=new Fragment2();
FragmentAdapter adapter=new FragmentAdapter(getSupportFragmentManager());
adapter.addFragment(fragment1,"字体");
adapter.addFragment(fragment2,"颜色");
viewPager.setAdapter(adapter);
tabLayout.setupWithViewPager(viewPager);
}