如何防止按钮在Android ViewPager上移动？

Question

我正在进行画廊活动，但我遇到了一些麻烦。我似乎无法使按钮（在viewpager的xml之外）保持静态。滑动时会创建看似重复的按钮，即使它位于viewpager的xml之外。我附上了一张捕捉到这个问题的图片。

<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"
tools:context="eqlogic.annswingsandthings.Activity_Gallery">

<android.support.v4.view.ViewPager
    android:id="@+id/gallery_viewpager"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_alignParentTop="true" />

<Button
    android:layout_width="64dp"
    android:layout_height="64dp"
    android:id="@+id/send_photo_button"
    android:layout_alignParentBottom="true"
    android:layout_alignParentRight="true"
    android:layout_alignParentEnd="true"
    android:background="@android:drawable/ic_menu_camera" />

</RelativeLayout>

public class GalleryPagerAdapter extends FragmentPagerAdapter {

    static Context m_Context;
    public GalleryPagerAdapter
            (FragmentManager fm, Context context)
    {
        super(fm);
        m_Context = context;
    }

    @Override
    public Fragment getItem(int i)
    {
        return GalleryBackgroundFragment.NewInstance(i);
    }

    @Override
    public int getCount() {
        if(GalleryDataHandler.m_Bitmaps != null)
            return GalleryDataHandler.m_Bitmaps.size();

        else return 0;
    }
}

public class GalleryBackgroundFragment extends Fragment {

    BitmapDrawable m_Bitmap;
    public static GalleryBackgroundFragment NewInstance(int i)
    {
        try
        {
            GalleryBackgroundFragment gallery = new GalleryBackgroundFragment();
            gallery.m_Bitmap = new BitmapDrawable
                    (Activity_Gallery.m_LocalActivity.getResources(),
                            GalleryDataHandler.m_Bitmaps.get(i));
            gallery.setRetainInstance(true);
            return gallery;
        }

        catch(Exception e)
        { Log.d("Error:", e.toString()); e.printStackTrace(); return null; }
    }

    @Override
    public View onCreateView
            (LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.activity_gallery, container, false);

        view.setBackground(m_Bitmap);
        return view;
    }
}