react-native-navigation/android/app/src/main/java/com/reactnativenavigation/activities/TabActivity.java

package com.reactnativenavigation.activities;

import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.widget.Toolbar;

import com.reactnativenavigation.R;
import com.reactnativenavigation.adapters.ViewPagerAdapter;
import com.reactnativenavigation.core.RctManager;
import com.reactnativenavigation.core.Screen;

import java.util.ArrayList;

/**
 * Created by guyc on 02/04/16.
 */
public class TabActivity extends BaseReactActivity {
    public static final String EXTRA_SCREENS = "extraTabs";

    private Toolbar mToolbar;
    private TabLayout mTabLayout;
    private ViewPager mViewPager;

    @Override
    protected void handleOnCreate() {
        mReactInstanceManager = RctManager.getInstance().getReactInstanceManager();

        setContentView(R.layout.tab_activity);
        mToolbar = (Toolbar) findViewById(R.id.toolbar);
        mTabLayout = (TabLayout) findViewById(R.id.tabLayout);
        mViewPager = (ViewPager) findViewById(R.id.viewPager);

        setupToolbar();
        setupViewPager();
    }

    private void setupToolbar() {
        setSupportActionBar(mToolbar);
    }

    private void setupViewPager() {
        ArrayList<Screen> screens = (ArrayList<Screen>) getIntent().getSerializableExtra(EXTRA_SCREENS);
        ViewPagerAdapter adapter = new ViewPagerAdapter(this, mViewPager, screens);
        mViewPager.setAdapter(adapter);
        mTabLayout.setupWithViewPager(mViewPager);
        mTabLayout.setOnTabSelectedListener(adapter);
        adapter.notifyDataSetChanged();
    }
}