CODEWITHSUNDEEP
androidandroid-canvas
user316117
user316117

Reputation: 8271

Android Canvas Drawline method - what units and where is it documented?

I'm writing some code that needs to draw some Canvas class drawing primitives consistently on devices with many different DPI's and screen resolutions. But I can't seem to find what units the drawLine() method's points are in.

It doesn't say in the canvas class documentation: http://developer.android.com/reference/android/graphics/Canvas.html#drawLine(float, float, float, float, android.graphics.Paint)

On S.O. This poster thinks it's in px: how to draw lines with drawLine method in multiple density screens

... and the answerer to this S.O. question did some experiments and determined that the units varied according to a setting in the manifest!

I also looked in Google's Canvas and Drawables documentation and the word "units" doesn't even appear there.

What units are the canvas drawing primitives like drawLine() in and where does Google/Android officially document this?

Upvotes: 2

Views: 2023

Answers (1)

Phantômaxx
Phantômaxx

Reputation: 38098

It's pixels. As with all the Canvas graphical functions (drawXYZ()).
Reference: http://developer.android.com/reference/android/graphics/Canvas.html

Mostly because it's all about drawing on a Bitmap.
And a Bitmap measure unit is the pixel.

Upvotes: 3

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