Fix contact details not responding to touch events

import android.support.v4.view.PagerAdapter;

import android.support.v4.view.ViewPager;

import android.view.View;

import android.view.ViewGroup;

/**

 * Adapter for the {@link ViewPager} for the contact detail page for a contact with social updates.

 * Adapter for the {@link ViewPager} for the contact detail page for a contact in 2 cases:

 * 1) without social updates, and 2) with social updates. The default initial case is for

 * the contact with social updates which uses all possible pages.

 */

public class ContactDetailViewPagerAdapter extends PagerAdapter {

    private static final int MAX_FRAGMENT_VIEW_COUNT = 2;

    /**

     * The initial value for the view count needs to be MAX_FRAGMENT_VIEW_COUNT,

     * otherwise anything smaller would break screen rotation functionality for a user viewing

     * a contact with social updates (i.e. the user was viewing the second page, rotates the

     * device, the view pager requires the second page to exist immediately on launch).

     */

    private int mFragmentViewCount = MAX_FRAGMENT_VIEW_COUNT;

    private View mAboutFragmentView;

    /** Gets called when the number of items changes. */

    @Override

    public int getItemPosition(Object object) {

        // Always return a valid index for the about fragment view because it's always shown

        // whether the contact has social updates or not.

        if (object == mAboutFragmentView) {

            return INDEX_ABOUT_FRAGMENT;

        }

        if (object == mUpdatesFragmentView) {

        // Only return a valid index for the updates fragment view if our view count > 1.

        if (object == mUpdatesFragmentView && mFragmentViewCount > 1) {

            return INDEX_UPDATES_FRAGMENT;

        }

        // Otherwise the view should have no position.

        return POSITION_NONE;

    }

    public Object instantiateItem(View container, int position) {

        switch (position) {

            case INDEX_ABOUT_FRAGMENT:

                mAboutFragmentView.setVisibility(View.VISIBLE);

                return mAboutFragmentView;

            case INDEX_UPDATES_FRAGMENT:

                mUpdatesFragmentView.setVisibility(View.VISIBLE);

                return mUpdatesFragmentView;

        }

        throw new IllegalArgumentException("Invalid position: " + position);

    @Override

    public void destroyItem(View container, int position, Object object) {

        ((View) object).setVisibility(View.GONE);

    }

    @Override