ScrollParallaxImageView

ScrollParallaxImageView扩展ImageView，并提供视差效果，当它在屏幕上滚动。它可以在任何视图，可以滚动其内容，如ListView，RecyclerView，ScrollView等。

屏幕截图

包括ScrollParallaxImageView到您的项目

用gradle：

dependencies {
   compile 'com.gjiazhe:scrollparallaximageview:1.0'
}

使用ScrollParallaxImageView在布局文件就像ImageView

<com.gjiazhe.scrollparallaximageview.ScrollParallaxImageView
    android:id="@+id/img"
    android:layout_width="match_parent"
    android:layout_height="180dp"
    android:src="@drawable/pic1"
    android:scaleType="centerCrop" />

在Java代码中设置视差样式

ScrollParallaxImageView iv = (ScrollParallaxImageView) findViewById(R.id.img);
iv.setParallaxStyles(new VerticalMovingStyle()); // or other parallax styles

在库中有几个视差样式，但你也可以自定义。只需创建一个类实现接口ScrollParallaxImageView.ParallaxStyle：

public class MyParallaxStyle implements ScrollParallaxImageView.ParallaxStyle {
  @Override
    public void transform(ScrollParallaxImageView view, Canvas canvas, int x, int y) {
        // Transform the view here, x and y stands for the coordinate of
        // ScrollParallaxImageView's top-left corner.
    }

    @Override
    public void onAttachedToImageView(ScrollParallaxImageView view) {
        // Do something when the style is set to a ScrollParallaxImageView.
    }

    @Override
    public void onDetachedFromImageView(ScrollParallaxImageView view) {
        // Do something when the style is remove from a ScrollParallaxImageView.
    }
}