I'm trying to emulate a parallax effect when sliding through my fragments, I've read about beginFakeDrag and fakeDragBy but to be honest, I don't know even if it's the best approach to my problem.
Anyone has done something similar with the ViewPager or have a hint about how should I approach this?
Thank you
An easy way to do this without using a custom library is to implement ViewPager.PageTransformer
I created my layouts to use the same id
for their background element. For my example all background images will use the id background
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/background"
android:src="@drawable/img12"
android:scaleType="fitXY"/>
Then when I go in to implement ViewPager.PageTransformer
I can reference that image like so:
public class Transformer implements ViewPager.PageTransformer{
@Override
public void transformPage(View page, float position) {
if(position >= -1 && position <= 1){
page.findViewById(R.id.background).setTranslationX(-position * page.getWidth() / 2);
} else {
page.setAlpha(1);
}
}
}
Finally, I assign my ViewPager.PageTransformer
to my ViewPager
like so.
ViewPager pager = (ViewPager) findViewById(R.id.pager);
pager.setPageTransformer(false, new Transformer());