RectF use dp or px?

Question

In Canvas, drawing an rectangle with RectF, need set top and left in dp or px?

Integer padding = 10;
Integer width = 100; // It is dp or px?
Integer height = 50;

RectF position = new RectF();
position.top = 0 + padding;
position.bottom = position.top + height;
position.left = 0 + padding;
position.right = position.left + width;

http://developer.android.com/intl/es/reference/android/graphics/RectF.html It does not indicate if the values are represented in px or dp.

canvas always uses **px**. – Phantômaxx Sep 12 '15 at 15:06 — Phantômaxx, Sep 12 '15 at 15:06

score 7 · Accepted Answer · edited Nov 05 '19 at 02:44

As has already been pointed out, Canvas and RectF use px and not dp. As for the documentation, the documentation for Canvas (http://developer.android.com/intl/es/reference/android/graphics/Canvas.html) and RectF only mention pixels.

Since it is not explicitly pointed out that they are dp and both classes are directly derived from java.lang.Object, one can only conclude that it must be "normal" pixels.

If, for some reason, you need to convert from dp to px and vice versa, have a look at this document: http://developer.android.com/intl/es/guide/practices/screens_support.html

score 0 · Answer 2 · answered Sep 12 '15 at 15:04

0

It uses pixels, not density independent pixels.

answered Sep 12 '15 at 15:04

Alex Lockwood

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Thanks, that documentation where it is defined? – e-info128 Sep 12 '15 at 15:06
Not sure. Most if not all graphics APIs in Android use pixels though – Alex Lockwood Sep 12 '15 at 16:34

score 0 · Answer 3 · answered Apr 19 '19 at 13:36

0

It using pixel but if you want must convert it.

private int convertDpToPx(int dp){
    return Math.round(dp * (getResources().getDisplayMetrics().xdpi / DisplayMetrics.DENSITY_DEFAULT));
}

I hope it helps.

answered Apr 19 '19 at 13:36

saeid aslami

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RectF use dp or px?

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