Parallax Effect In Android's Viewpager

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 approac

Solution 1:

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:

publicclassTransformerimplementsViewPager.PageTransformer{
    @OverridepublicvoidtransformPage(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.

ViewPagerpager= (ViewPager) findViewById(R.id.pager);
pager.setPageTransformer(false, newTransformer());

Solution 2:

This question is a bit old, but I found it when I was trying to do exactly that...

I implemented my own solution, basically extending ViewPager and overriding onDraw.

You can find all the code with a simple example here

Solution 3:

I know that it's a bit old but take a look to that https://github.com/xgc1986/ParallaxPagerLibrary

It not overrides the onDraw method, and the effect not only with images, it works with every kind of view

mPager.setPageTransformer(false, newParallaxTransformer(R.id.parallaxContent));

R.id.paraallaxContent is the id of the View you want to have this effect

unless the other solutions, don't need any any concrete structure to work, and also is layout independant

demo: youtube

Solution 4:

Maybe this library can help you:

https://github.com/garrapeta/ParallaxViewPager

Solution 5:

You can take a look at this :

https://github.com/luxsypher/ParallaxViewPager

you can apply a parallax effect on any element of your view and gave them all different speed