Continue from Tutorial 105

package com.notarazi.mytab1;

import android.support.design.widget.TabLayout;

import android.support.design.widget.FloatingActionButton;

import android.support.design.widget.Snackbar;

import android.support.v7.app.AppCompatActivity;

import android.support.v7.widget.Toolbar;

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.os.Bundle;

import android.view.LayoutInflater;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.view.ViewGroup;

import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

   /**

    * The {@link android.support.v4.view.PagerAdapter} that will provide

    * fragments for each of the sections. We use a

    * {@link FragmentPagerAdapter} derivative, which will keep every

    * loaded fragment in memory. If this becomes too memory intensive, it

    * may be best to switch to a

    * {@link android.support.v4.app.FragmentStatePagerAdapter}.

    */

   private SectionsPagerAdapter mSectionsPagerAdapter;

   /**

    * The {@link ViewPager} that will host the section contents.

    */

   private ViewPager mViewPager;

   @Override

   protected void onCreate(Bundle savedInstanceState) {

       super.onCreate(savedInstanceState);

       setContentView(R.layout.activity_main);

       Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);

       setSupportActionBar(toolbar);

       // Create the adapter that will return a fragment for each of the three

       // primary sections of the activity.

       mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());

       // Set up the ViewPager with the sections adapter.

       mViewPager = (ViewPager) findViewById(R.id.container);

       mViewPager.setAdapter(mSectionsPagerAdapter);

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

       tabLayout.setupWithViewPager(mViewPager);

       FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);

       fab.setOnClickListener(new View.OnClickListener() {

           @Override

           public void onClick(View view) {

               Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)

                       .setAction("Action", null).show();

           }

       });

   }

   @Override

   public boolean onCreateOptionsMenu(Menu menu) {

       // Inflate the menu; this adds items to the action bar if it is present.

       getMenuInflater().inflate(R.menu.menu_main, menu);

       return true;

   }

   @Override

   public boolean onOptionsItemSelected(MenuItem item) {

       // Handle action bar item clicks here. The action bar will

       // automatically handle clicks on the Home/Up button, so long

       // as you specify a parent activity in AndroidManifest.xml.

       int id = item.getItemId();

       //noinspection SimplifiableIfStatement

       if (id == R.id.action_settings) {

           return true;

       }

       return super.onOptionsItemSelected(item);

   }

   /**

    * A placeholder fragment containing a simple view.

    */

   public static class PlaceholderFragment extends Fragment {

       /**

        * The fragment argument representing the section number for this

        * fragment.

        */

       private static final String ARG_SECTION_NUMBER = "section_number";

       public PlaceholderFragment() {

       }

       /**

        * Returns a new instance of this fragment for the given section

        * number.

        */

       public static PlaceholderFragment newInstance(int sectionNumber) {

           PlaceholderFragment fragment = new PlaceholderFragment();

           Bundle args = new Bundle();

           args.putInt(ARG_SECTION_NUMBER, sectionNumber);

           fragment.setArguments(args);

           return fragment;

       }

       @Override

       public View onCreateView(LayoutInflater inflater, ViewGroup container,

                                Bundle savedInstanceState) {

           View rootView = inflater.inflate(R.layout.fragment_main, container, false);

           TextView textView = (TextView) rootView.findViewById(R.id.section_label);

           textView.setText(getString(R.string.section_format, getArguments().getInt(ARG_SECTION_NUMBER)));

           return rootView;

       }

   }

   /**

    * A {@link FragmentPagerAdapter} that returns a fragment corresponding to

    * one of the sections/tabs/pages.

    */

   public class SectionsPagerAdapter extends FragmentPagerAdapter {

       public SectionsPagerAdapter(FragmentManager fm) {

           super(fm);

       }

       @Override

       public Fragment getItem(int position) {

           // getItem is called to instantiate the fragment for the given page.

           // Return a PlaceholderFragment (defined as a static inner class below).

           return PlaceholderFragment.newInstance(position + 1);

       }

       @Override

       public int getCount() {

           // Show 3 total pages.

           return 3;

       }

       @Override

       public CharSequence getPageTitle(int position) {

           switch (position) {

               case 0:

                   return "SECTION 1";

               case 1:

                   return "SECTION 2";

               case 2:

                   return "SECTION 3";

           }

           return null;

       }

   }

}

<?xml version="1.0" encoding="utf-8"?>

<android.support.design.widget.CoordinatorLayout 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:id="@+id/main_content"

   android:layout_width="match_parent"

   android:layout_height="match_parent"

   android:fitsSystemWindows="true"

   tools:context="com.notarazi.mytab1.MainActivity">

   <android.support.design.widget.AppBarLayout

       android:id="@+id/appbar"

       android:layout_width="match_parent"

       android:layout_height="wrap_content"

       android:paddingTop="@dimen/appbar_padding_top"

       android:theme="@style/AppTheme.AppBarOverlay">

       <android.support.v7.widget.Toolbar

           android:id="@+id/toolbar"

           android:layout_width="match_parent"

           android:layout_height="?attr/actionBarSize"

           android:background="?attr/colorPrimary"

           app:layout_scrollFlags="scroll|enterAlways"

           app:popupTheme="@style/AppTheme.PopupOverlay">

       </android.support.v7.widget.Toolbar>

       <android.support.design.widget.TabLayout

           android:id="@+id/tabs"

           android:layout_width="match_parent"

           android:layout_height="wrap_content" />

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

   <android.support.v4.view.ViewPager

       android:id="@+id/container"

       android:layout_width="match_parent"

       android:layout_height="match_parent"

       app:layout_behavior="@string/appbar_scrolling_view_behavior" />

   <android.support.design.widget.FloatingActionButton

       android:id="@+id/fab"

       android:layout_width="wrap_content"

       android:layout_height="wrap_content"

       android:layout_gravity="end|bottom"

       android:layout_margin="@dimen/fab_margin"

       android:src="@android:drawable/ic_dialog_email" />

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

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

   xmlns:tools="http://schemas.android.com/tools"

   android:layout_width="match_parent"

   android:layout_height="match_parent"

   android:paddingBottom="@dimen/activity_vertical_margin"

   android:paddingLeft="@dimen/activity_horizontal_margin"

   android:paddingRight="@dimen/activity_horizontal_margin"

   android:paddingTop="@dimen/activity_vertical_margin"

   tools:context="com.notarazi.mytab1.MainActivity$PlaceholderFragment">

   <TextView

       android:id="@+id/section_label"

       android:layout_width="wrap_content"

       android:layout_height="wrap_content" />

</RelativeLayout>