Pull down to refreshing with wave animation

<scrollView
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:background="@drawable/image"
        android:id="@+id/scrollView"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    <com.dx.waverefresh.lib.WaveRefreshLayout
            android:id="@+id/contentLayout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            app:wr_topImageHeight="@dimen/defaultTopImageHeight"
            app:wr_waveAmplitude="10dp"
            app:wr_angle="10"
            app:wr_bgColor="@color/colorWhite"
            app:wr_speed="6"
            app:wr_gravity="right">
	    
	    ...
	    
    </com.dx.waverefresh.lib.WaveRefreshLayout>
</scrollView>    

waveRefreshLayout.setBackgroundOffset(p);

//start refreshing
waveRefreshLayout.startLoadingAnimation();
//not trigger refreshing
waveRefreshLayout.restoreBackground();

waveRefreshLayout.stopLoading();

allprojects {
    repositories {
	...
	maven { url 'https://jitpack.io' }
    }
}

dependencies {
    compile 'com.github.StevenDXC:DxWaveRefresh:1.0'
}