What is the correct way to specify dimensions in DIP from Java code?

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I found that it is possible to set dimensions of my interface elements in XML layouts using DIPs as in following fragment: 

android:layout_width="10dip"

But all Java interface takes integer as arguments and there is no way to specify dimensions in DIPs. What is the correct way to calculate this?

I figured that I have to use property density of DisplayMetrics class but is this a correct way?

May I rely on this formula being always correct?

pixels * DisplayMetrics.density = dip

Is there a utility function for the conversion somewhere in Android?

density-independent-pixel layout android
4 Answers

That is the correct formula there. Although DisplayMetrics.density is not a static member, so, according to the same document you alluded to, correct usage is:

// Maybe store this in a static field?
final float SCALE = getContext().getResources().getDisplayMetrics().density;

// Convert dips to pixels
float valueDips = 16.0f;
int valuePixels = (int)(valueDips * SCALE + 0.5f); // 0.5f for rounding
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