If you need accuracy, there's really no other option than to have the user calibrate the device. I've seen the same problem on Nokia phones -- the N97 and N97mini have (nearly) the exact same OS & features, & so report the same screen size. But the mini is about 10% smaller. In the wild and woolly Android market it will be even worse.
What I'd do is have the user place on the screen a coin of known size (let them pick between US quarter and Euro coin, eg), and provide 4 buttons to increase/decrease height and width until the coin fits a circle on the screen. On Dec 31 2010, 6:35 am, Phil Endecott <spam_from_goo...@chezphil.org> wrote: > Hi All, > > Imagine trying to display an accurate ruler on the screen, or > something like that. I'd like to know the screen's pixel density in > pixels-per-inch, or equivalently its dimensions in mm and resolution > in pixels, so that I know the accurate physical size of the thing that > I'm drawing. Is there any way to get this info? > > Failing that, I'm aware that the system knows the approximate density > (one of three values IIRC). How can I retrieve this programatically? > > Thanks, Phil. -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
