Conversion between px and dp unit

Question

I want to set layout_marginTop to 800px using setLayoutParams(). But I want know what would be this value in dp unit?

Thanks in advance.

`LayoutParams` expects pixel. You have to be more specific... — Knickedi, May 12 '12 at 18:25
If you're trying to convert dip to px then here it is: `int px = (int) (dip * mContext.getResources().getDisplayMetrics().density + 0.5f)`. I still do not understand what you're trying to achieve. — Knickedi, May 12 '12 at 18:41
main idea in questions is convert pixels to dp. I want to know 1dp = ?px in my screen. — Zerntrino, May 12 '12 at 18:43
1 dip = `mContext.getResources().getDisplayMetrics().density`. So dip depends on the current device configuration. You should mention that in your question, so other people know what you're searching for. — Knickedi, May 12 '12 at 18:50
Sorry I change question for people understanding in my question. — Zerntrino, May 12 '12 at 19:02
You were already given the answer, in the upvoted comments. The rest is basic arithmetic. — CommonsWare, May 12 '12 at 19:15
my screen 552x1024 I want to set margin top 800px. How many set dip in LayoutParams margin top — Zerntrino, May 12 '12 at 19:24
Sorry I change question for people understanding in my question again. — Zerntrino, May 12 '12 at 19:33

score 2 · Accepted Answer · answered May 13 '12 at 00:18

The logical density of the display is given in the DisplayMetrics class, and can be retrieved with,

getResources().getDisplayMetrics().density

Thus, to convert dp to px, you would do,

int density = getResources().getDisplayMetrics().density;
int px = (int) (dp * density);

To convert px to dp, just perform the inverse operation,

int dp = px/density;

1 Answers1