Source link: https://github.com/kanytu/android-parallax-recyclerview

android-parallax-recycleview

Integration

Step 1. Add the JitPack repository to your build file

repositories {

  maven {

url "https://jitpack.io"
  
}
 
}

Step 2. Add the dependency

dependencies {
  compile 'com.github.kanytu:android-parallax-recyclerview:v1.7' 
}

USAGE

(Example project - https://github.com/kanytu/example-parallaxrecycler)

Create your object list and pass it to the constructor of ParallaxRecyclerAdapter

List<String> myContent = new ArrayList<String>();
 // or another object list ParallaxRecyclerAdapter<String> adapter = new ParallaxRecyclerAdapter<String>(content) {

 @Override

 public void onBindViewHolderImpl(RecyclerView.ViewHolder viewHolder, ParallaxRecyclerAdapter<String> adapter, int i) {

// If you're using your custom handler (as you should of course) 

// you need to cast viewHolder to it.

((MyCustomViewHolder) viewHolder).textView.setText(myContent.get(i));
 // your bind holder routine.

 
}

  @Override

 public RecyclerView.ViewHolder onCreateViewHolderImpl(ViewGroup viewGroup, final ParallaxRecyclerAdapter<String> adapter, int i) {

// Here is where you inflate your row and pass it to the constructor of your ViewHolder

return new MyCustomViewHolder(LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.myRow, viewGroup, false));

 
}

  @Override

 public int getItemCountImpl(ParallaxRecyclerAdapter<String> adapter) {

// return the content of your array

return myContent.size();

 
}

}
;

Now we set the parallax header. You need to pass the RecyclerView too to implement the scroll listeners.

myAdapter.setParallaxHeader(LayoutInflater.from(this).inflate(
  R.layout.myParallaxView, myRecycler, false), myRecyclerView);

There a few other listeners you can implement:

// Event triggered when you click on a item of the adapter. void onClick(View v, int position);

// Event triggered when the parallax is being scrolled. void onParallaxScroll(float percentage, float offset, View parallax);

RESULT

COOL EFFECTS YOU CAN DO WITH THIS LIBRARY

Transparent toolbar effect

@Override public void onParallaxScroll(float percentage, float offset, View parallax) {

Drawable c = mToolbar.getBackground();

c.setAlpha(Math.round(percentage * 255));

mToolbar.setBackground(c);
 
}