how can I set ImageView position in dpi fro android api 8?

Question

my android app supports Android api 8

and I want to move an object x dpi to the left.

how can I do it?

Answer 1

You should transform the amount of dip to the right amount of pixels for the given screen.

This is the formula you should use:

pixels = dip * (density / 160)

the (density / 160) part is known as the density scale factor. You can get this scale factor using the following code.

float scale = getContext().getResources().getDisplayMetrics().density;

Than calculate the right amount of pixels from the given amount of dip and round it:

int pixels (int) (dip * scale + 0.5f);

In function form it would look like this.

public int getPixelFromDip(float dip){
    final float scale = getContext().getResources().getDisplayMetrics().density;
    return (int) (dip * scale + 0.5f);
}

Rolf