Parallax effect on PEWImageView inside GridView is unnoticeable

[Signoo]

I'm using PEWImageView in order to add parallax effect to some images inside a GridView, the problem is that the parallax effect on the images is almost unnoticeable.. Is it possible to specify the velocity of the parallax effect? is there any method already defined?

[ghost]

Override the PEWImageView like this:

`
public class ParalaxImageView extends PEWImageView{

public ParalaxImageView(Context context) {
    super(context);
}

public ParalaxImageView(Context context, AttributeSet attrs) {
    super(context, attrs);
}

public ParalaxImageView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
}

@Override
public void setImageResource(int resId) {
    super.setImageResource(resId);
    invalidate();
}

@Override
public void setImageDrawable(Drawable drawable) {
    super.setImageDrawable(drawable);
    invalidate();
}

@Override
public void setImageBitmap(Bitmap bm) {
    super.setImageBitmap(bm);
    invalidate();
}

}
`

And it will work fine.

I'll submit a pull request soon.