How to create listview like this in android 1.6 or 2 (because of renderscript, which works only in 3 or later, but I need list to work on almost all androids):
I used Camera.setTranslate(x, 0, z)
in drawChild, where changed x position for rotation virtualization and z for overlaping. Then there was problem with overlapping, because last item was on top and first on bottom layer. So, in onCreate()
method called this.setChildrenDrawingOrderEnabled(true)
and overriden protected int getChildDrawingOrder (int childCount, int i) {}
where I could change order for middle and later rows.
This idea was given by Renard, who suggested me in other my post about almost same thing here.
My getChildDrawingOrder(int, int) implementation to get overlapping I need:
@Override
protected int getChildDrawingOrder (int childCount, int i) {
int centerChild = 0;
//find center row
if ((childCount % 2) == 0) { //even childCount number
centerChild = childCount / 2; // if childCount 8 (actualy 0 - 7), then 4 and 4-1 = 3 is in centre.
int otherCenterChild = centerChild - 1;
//Which more in center?
View child = this.getChildAt(centerChild);
final int top = child.getTop();
final int bottom = child.getBottom();
//if this row goes through center then this
final int absParentCenterY = getTop() + getHeight() / 2;
//Log.i("even", i + " from " + (childCount - 1) + ", while centerChild = " + centerChild);
if ((top < absParentCenterY) && (bottom > absParentCenterY)) {
//this child is in center line, so it is last
//centerChild is in center, no need to change
} else {
centerChild = otherCenterChild;
}
}
else {//not even - done
centerChild = childCount / 2;
//Log.i("not even", i + " from " + (childCount - 1) + ", while centerChild = " + centerChild);
}
int rez = i;
//find drawIndex by centerChild
if (i > centerChild) {
//below center
rez = (childCount - 1) - i + centerChild;
} else if (i == centerChild) {
//center row
//draw it last
rez = childCount - 1;
} else {
//above center - draw as always
// i < centerChild
rez = i;
}
//Log.i("return", "" + rez);
return rez;
}
I hope this post will help someone in future
Screenshot is actually almost the same as I mentioned in my question. I used alpha, so overlayed items is a little bit see-through: