doesn't work properly when page width is below 1f

[AmirAliSobhGol]

this is my code:
<com.andraskindler.parallaxviewpager.ParallaxViewPager
android:id="@+id/pager"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:background="@drawable/background"
android:layout_weight="1"
android:visibility="gone"/>
and the page width: return(0.8f);
the problem is when u go to the next page 0.2 background of the page is white