Android Example: How to Implement Horizontal View Swiping with Tabs

The Goal is to implement horizontal View swiping with Tabs in Android like the Google Play Store.

I used the default code from Eclipse.

public class MainActivity extends FragmentActivity {

	/**
	 * The {@link android.support.v4.view.PagerAdapter} that will provide
	 * fragments for each of the sections. We use a
	 * {@link android.support.v4.app.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}.
	 */
	SectionsPagerAdapter mSectionsPagerAdapter;

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

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

		// Create the adapter that will return a fragment for each of the three
		// primary sections of the app.
		mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());

		// Set up the ViewPager with the sections adapter.
		mViewPager = (ViewPager) findViewById(R.id.pager);
		mViewPager.setAdapter(mSectionsPagerAdapter);

	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	/**
	 * 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 DummySectionFragment (defined as a static inner class
			// below) with the page number as its lone argument.
			Fragment fragment = new DummySectionFragment();
			Bundle args = new Bundle();
			args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position + 1);
			fragment.setArguments(args);
			return fragment;
		}

		@Override
		public int getCount() {
			// Show 3 total pages.
			return 3;
		}

		@Override
		public CharSequence getPageTitle(int position) {
			Locale l = Locale.getDefault();
			switch (position) {
			case 0:
				return getString(R.string.title_section1).toUpperCase(l);
			case 1:
				return getString(R.string.title_section2).toUpperCase(l);
			case 2:
				return getString(R.string.title_section3).toUpperCase(l);
			}
			return null;
		}
	}

	/**
	 * A dummy fragment representing a section of the app, but that simply
	 * displays dummy text.
	 */
	public static class DummySectionFragment extends Fragment {
		/**
		 * The fragment argument representing the section number for this
		 * fragment.
		 */
		public static final String ARG_SECTION_NUMBER = "section_number";

		public DummySectionFragment() {
		}

		@Override
		public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
			View rootView = inflater.inflate(R.layout.fragment_main_dummy, container, false);
			TextView dummyTextView = (TextView) rootView.findViewById(R.id.section_label);
			dummyTextView.setText(Integer.toString(getArguments().getInt(ARG_SECTION_NUMBER)));
			return rootView;
		}
	}

}

The Layout XML for the MainActivity:

<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >

<!--
This title strip will display the currently visible page title, as well as the page
titles for adjacent pages.
-->

<android.support.v4.view.PagerTitleStrip
android:id="@+id/pager_title_strip"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:background="#33b5e5"
android:paddingBottom="4dp"
android:paddingTop="4dp"
android:textColor="#fff" />

</android.support.v4.view.ViewPager>

The Layout XML for the DummyFragment:

 <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=".MainActivity$DummySectionFragment" >

<TextView
android:id="@+id/section_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

</RelativeLayout>

Instead of the Dummy Fragment you can create your own Fragments.

Just create a new java class that extends “Fragment”.

You can attach your own Fragments to the “MainActivity” that way:

	@Override
	public Fragment getItem(int position) {
		Fragment fragment = new Fragment();
		switch (position) {
		case 0:
			return fragment = new Fragment1();
		case 1:
			return fragment = new Fragment2();
		case 2:
			return fragment = new Fragment3();
		default:
			break;
		}
		return fragment;

That’s all

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