main

public class MainActivity extends AppCompatActivity {

    android.app.FragmentManager fragmentManager;
    private DrawerLayout drawerLayout;
    private Toolbar toolbar;
    private Intent intent;





    @Override
    protected void onCreate(Bundle savedInstanceState) {
        checkShowTutorial();
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        fragmentManager = getFragmentManager();

        setUI();
        initNavigationView();


    }


    public void setUI() {

        toolbar = (Toolbar) findViewById(R.id.toolbar);
        if (toolbar != null) {
            setSupportActionBar(toolbar);
            getSupportActionBar().setDisplayShowHomeEnabled(true);
        }

        TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);
        tabLayout.addTab(tabLayout.newTab().setText(R.string.Yesterday));
        tabLayout.addTab(tabLayout.newTab().setText(R.string.Today));
        tabLayout.addTab(tabLayout.newTab().setText(R.string.Tomorrow));

        final ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
        TabAdapter tabAdapter = new TabAdapter(fragmentManager, 3);

        viewPager.setAdapter(tabAdapter);
        viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
        viewPager.setCurrentItem(1);

        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) {

            }

        });

    }

   }