I’m trying to limit this but I only get a mess with every thing I try. Can you help me please?

I see, you are talking about slightly more ‘strong’ parallax effect. In your case i’m agree – navigating through 3D scene should expect such rotation to be handled properly. But if you take iOS8’s parallaxed wallpaper – you’ll find more ‘simple’ parallax there. ( Nice leafs btw! )

I would have to disagree. I think that it’s neither rare nor ideal for people to look left and right in addition to up and down when looking at parallax effects. About gyroscopes, you justify it in your blog that they aren’t available in most of the phones. You say, “…as i found out gyroscope is not present at majority of phones while accelerometer gives enough of data to be happy with it”. I find that’s a good justification not to include it. However, magnetometers/compasses are available in majority of the phones. Isn’t it possible to obtain the bearing from the compass and use that in addition to the pitch and roll you obtain from the accelerometer to include a horizontal component to the parallax effect. Please try out this live wallpaper, it has an option for gravity+compass and compare it to gravity only. (https://play.google.com/store/apps/details?id=com.doctorkettlers.autumn).

You are describing rare ideal situation. In practice gravity vector is enough to get the impression. Additional improvement would be to add gyroscopic sensor.

z is logical depth of item. Its needed when you have several z-layers. If you have only one image background you can use just x=dgX*K, where K – intensity of effect.
Instead of setting width and height, you should probably change some margin, because x,y are offset coordinates – not size. And so you have to shift – not scale.

First, thanks for the response. Reading your answer i understand what means p->x,p->y, so i do this:

view.getLayoutParams().width += dgX * (1. + 10. * “dont know” );
view.getLayoutParams().height -= dgY * (1. + 10. * “dont know”);

But i dont know what value i should put in p->z because my view doesnt have z coordinate, so i put the raw Z value that i get from event.values[2]. I test my app and the image scale in a crazy way, so i think that value is no the correct, what is? and finally in the xml of the imageview, i have to put some specific scaletype? or that doesnt matter.

Thanks for advance.

Hello, p – stands for particle and x,y – it’s coordinates. In your case instead of p should be any objects which you want move (background image, particles, etc)