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

An adapter which could be used to achieve a parallax effect on RecyclerView.
https://github.com/kanytu/android-parallax-recyclerview

Last synced: about 2 months ago
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An adapter which could be used to achieve a parallax effect on RecyclerView.

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README

        

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`

```java
List myContent = new ArrayList(); // or another object list
ParallaxRecyclerAdapter adapter = new ParallaxRecyclerAdapter(content) {
@Override
public void onBindViewHolderImpl(RecyclerView.ViewHolder viewHolder, ParallaxRecyclerAdapter 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 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 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.

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

There a few other listeners you can implement:

```java
// 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**

![ParallaxListView](https://raw.githubusercontent.com/kanytu/android-parallax-recycleview/master/screenshots/screenshot.gif)

**COOL EFFECTS YOU CAN DO WITH THIS LIBRARY**

- Transparent toolbar effect

```java
@Override
public void onParallaxScroll(float percentage, float offset, View parallax) {
Drawable c = mToolbar.getBackground();
c.setAlpha(Math.round(percentage * 255));
mToolbar.setBackground(c);
}
```

![ParallaxListView](https://raw.githubusercontent.com/kanytu/android-parallax-recycleview/master/screenshots/parallaxtoolbar.gif)

[![Android Arsenal](https://img.shields.io/badge/Android%20Arsenal-android--parallax--recyclerview-brightgreen.svg?style=flat)](https://android-arsenal.com/details/3/1095)

## License
Copyright (c) 2014 Pedro Oliveira

Licensed under the [Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0.html)