BottomTabActivity.java

package com.aswifter.material.example;

import android.content.Context;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import com.aswifter.material.R;

/**
 * Created by chenyc on 15/8/9.
 */
public class BottomTabActivity extends AppCompatActivity {

    private ViewPager viewPager;
    private TabLayout tabLayout;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_bottom_tab);

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        toolbar.setTitle(R.string.title_buttom_tab);
        setSupportActionBar(toolbar);
        getSupportActionBar().setHomeButtonEnabled(true);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        toolbar.setNavigationOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                onBackPressed();
            }
        });

        viewPager = (ViewPager)findViewById(R.id.viewPager);
        tabLayout = (TabLayout) findViewById(R.id.tabLayout);

        SampleFragmentPagerAdapter pagerAdapter =
                new SampleFragmentPagerAdapter(getSupportFragmentManager(), this);

        viewPager.setAdapter(pagerAdapter);


        tabLayout.setupWithViewPager(viewPager);

        for (int i = 0; i < tabLayout.getTabCount(); i++) {
            TabLayout.Tab tab = tabLayout.getTabAt(i);
            if (tab != null) {
                tab.setCustomView(pagerAdapter.getTabView(i));
            }
        }

//        viewPager.setCurrentItem(1);
        tabLayout.getTabAt(0).getCustomView().setSelected(true);
    }


    public class SampleFragmentPagerAdapter extends FragmentPagerAdapter {
        final int PAGE_COUNT = 3;
        private String tabTitles[] = new String[]{"TAB1","TAB2","TAB3"};
        private Context context;


        public View getTabView(int position) {
            View v = LayoutInflater.from(context).inflate(R.layout.custom_tab, null);
            TextView tv = (TextView) v.findViewById(R.id.news_title);
            tv.setText(tabTitles[position]);
            ImageView img = (ImageView) v.findViewById(R.id.imageView);
            //img.setImageResource(imageResId[position]);
            return v;
        }

        public SampleFragmentPagerAdapter(FragmentManager fm, Context context) {
            super(fm);
            this.context = context;
        }

        @Override
        public int getCount() {
            return PAGE_COUNT;
        }

        @Override
        public Fragment getItem(int position) {
            return PageFragment.newInstance(position + 1);
        }

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

    public static class PageFragment extends Fragment {
        public static final String ARG_PAGE = "ARG_PAGE";

        private int mPage;

        public static PageFragment newInstance(int page) {
            Bundle args = new Bundle();
            args.putInt(ARG_PAGE, page);
            PageFragment fragment = new PageFragment();
            fragment.setArguments(args);
            return fragment;
        }

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            mPage = getArguments().getInt(ARG_PAGE);
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                 Bundle savedInstanceState) {
            View view = inflater.inflate(R.layout.fragment_page, container, false);
            TextView textView = (TextView) view;
            textView.setText("Fragment #" + mPage);
            return view;
        }
    }

}