Tab Layout with Sliding Effect [ Fragment ]-Android Application

Source Code:

Main Activity:

package com.example.samin.slidinglayout_test01;

import android.support.design.widget.TabLayout;

import android.support.v4.content.ContextCompat;

import android.support.v4.view.ViewPager;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

    private TabLayout tabLayout;

    private ViewPager viewPager;

    private ViewPagerAdapter adapter;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        tabLayout = (TabLayout) findViewById(R.id.tab_layout);

        viewPager = (ViewPager) findViewById(R.id.viewpager);

        /*

        Creating Adapter and setting that adapter to the viewPager

        setSupportActionBar method takes the toolbar and sets it as

        the default action bar thus making the toolbar work like a normal

        action bar.

         */

        adapter = new ViewPagerAdapter(getSupportFragmentManager());

        viewPager.setAdapter(adapter);

        /*

        TabLayout.newTab() method creates a tab view, Now a Tab view is not the view

        which is below the tabs, its the tab itself.

         */

        //we also set the Test of the Tabs

        final TabLayout.Tab test01 = tabLayout.newTab();

        final TabLayout.Tab test02 = tabLayout.newTab();

        final TabLayout.Tab test03 = tabLayout.newTab();

        test01.setIcon(R.drawable.medicines);

        test02.setIcon(R.drawable.saved_items_inactive);

        test03.setIcon(R.drawable.alarm_inactive)

        tabLayout.addTab(test01,0);

        tabLayout.addTab(test02,1);

        tabLayout.addTab(test03,2);

        tabLayout.setTabTextColors(ContextCompat.getColorStateList(this,R.color.tab_selector));

        tabLayout.setSelectedTabIndicatorColor(ContextCompat.getColor(this,R.color.colorAccent));

        viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));

        viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {

            @Override

            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

            @Override

            public void onPageSelected(int position) {

                switch (position) {

                    case 0:

                        test01.setIcon(R.drawable.medicines);

                        test02.setIcon(R.drawable.saved_items_inactive);

                        test03.setIcon(R.drawable.alarm_inactive);

                        break;

                    case 1:

                        test01.setIcon(R.drawable.medicines_inactive);

                        test02.setIcon(R.drawable.saved_items);

                        test03.setIcon(R.drawable.alarm_inactive);

                        break;

                    case 2:

                        test01.setIcon(R.drawable.medicines_inactive);

                        test02.setIcon(R.drawable.saved_items_inactive);

                        test03.setIcon(R.drawable.alarm);

                      break;

                }

 }

             @Override

               public void onPageScrollStateChanged(int state) {}

              }

        );

        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) { }

        });

} 

}

 Tab Fragment:

package com.example.samin.slidinglayout_test01;

import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class TabFragment extends Fragment {
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        View v = inflater.inflate(R.layout.custom_view,container,false);
        return v;
    }
}

 View Page Adapter:

package com.example.samin.slidinglayout_test01;

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;


public class ViewPagerAdapter extends FragmentStatePagerAdapter {
    public ViewPagerAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int position) {
       return new TabFragment();
    }

    @Override
    public int getCount() {
        return 3;
    }
}