java – 删除工具栏和tablayout之间的空间间隔

fragment_packs.xml

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="studio.com.archeagemanager.EventosFragment">

    <android.support.design.widget.CoordinatorLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true"
        tools:context="studio.com.archeagemanager.PacksFragment">

        <android.support.design.widget.AppBarLayout
            android:id="@+id/appbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <android.support.design.widget.TabLayout
                android:id="@+id/tabs"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                app:tabGravity="fill"
                app:tabMode="fixed"
                app:tabTextColor="#ffffff" />
        </android.support.design.widget.AppBarLayout>

        <android.support.v4.view.ViewPager
            android:id="@+id/viewpager"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@android:color/white"
            app:layout_behavior="@string/appbar_scrolling_view_behavior" />

    </android.support.design.widget.CoordinatorLayout>

</FrameLayout>

PacksFragment.java

public class PacksFragment extends Fragment {


    public PacksFragment() {
        // Required empty public constructor
    }

    @Override
    public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.fragment_packs,container,false);

        AppBarLayout appBarLayout = (AppBarLayout) view.findViewById(R.id.appbar);
        appBarLayout.setExpanded(false);

        TabLayout tabLayout = (TabLayout) view.findViewById(R.id.tabs);

        final ViewPager viewPager = (ViewPager) view.findViewById(R.id.viewpager);
        LinearLayoutManager mLayoutManager = new LinearLayoutManager(getActivity());
        mLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);

        viewPager.setAdapter(new PagerAdapter(getFragmentManager()));
        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 view;
    }

    public class PagerAdapter extends FragmentStatePagerAdapter {

        private String[] tabTitles = new String[]{"Tab1","Tab2","Tab3","Tab4"};

        public CharSequence getPageTitle(int position) {
            return tabTitles[position];
        }

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

        @Override
        public Fragment getItem(int position) {
            switch (position) {
                case 0:
                    return new TabFragmentA();
                case 1:
                    return new TabFragmentA();
                case 2:
                    return new TabFragmentA();
                case 3:
                    return new TabFragmentA();
                default:
                    return null;
            }
        }

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

    }

}