public void setGroupView(final ItemScrollFragment fragment, final int deltaPoster) {
tivFanart
.getViewTreeObserver()
.addOnGlobalLayoutListener(
new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
tivFanart.getViewTreeObserver().removeGlobalOnLayoutListener(this);
int paddingTop = tivFanart.getHeight() - deltaPoster;
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
// if fanart take more than 1/2 of the screen, put the groupView on the fanart
// halfway
if (tivFanart.getHeight() > (metrics.heightPixels) / 2)
paddingTop -= (tivFanart.getHeight() / 2);
ViewGroup viewGroup = fragment.getGroupView();
fragment.setGroupViewPadding(
viewGroup.getPaddingLeft(),
paddingTop,
viewGroup.getPaddingRight(),
viewGroup.getPaddingBottom());
}
});
}
public void onScrollChanged(ViewGroup viewGroup, int t) {
int height = viewGroup.getPaddingTop();
// 0 when not translated
// 1 when scrollView hit the top
float percentTranslated = Utils.linearConversion(t, 0, height, 0, 1);
// translate fanart
tivFanart.setTranslationY(-t * 0.5f);
// update fanart saturation
cfh.update(tivFanart, 1 - percentTranslated);
setActionBarAppearance(percentTranslated);
}