inches

I have a CSS stylesheet that uses media queries to change how a page is displayed based on how many inches it is in width (for instance, if it is smaller than 4 inches or being displayed on a handheld device, it assumes a more mobile-friendly LAF). The problem I have is with its content. On the homepage, there is a dock-style interface that dynamically changes height based on the current height and width of the window so that the text and items never leave the screen. However, my JS that determines this size does not know when the stylesheet has changed for handheld devices or small screens,

I'm beginning experiments with CSS' real-world units, specifically, in and cm , for purposes of printing. Are these units based on how they will be displayed on-screen or how they will be printed by a printer? How accurate are these units? Stephen According to W3C, only em , px and % are recommended for screen, the others for print. Therefore, in a print application, the in and cm measurements could be precisely accurate. There is an excellent article on such applications here: http://meyerweb.com/eric/articles/webrev/200001.html 来源： https://stackoverflow.com/questions/7341808/how-accurate-are

I am looking to convert pixes to inches and vice versa. I understand that I need DPI, but I am not sure how to get this information (e.g. I don't have the Graphics object, so that's not an option). Is there a way? On a video device, any answer to this question is typically not very accurate. The easiest example to use to see why this is the case is a projector. The output resolution is, say, 1024x768, but the DPI varies by how far away the screen is from the projector apeture. WPF, for example, always assumes 96 DPI on a video device. Presuming you still need an answer, regardless of the

The desire have 480 x 800 pixels, 3.7 inches and the HD have 480 x 800 pixels, 4.3 inches screen specification. I run the code that is accepted as answer from this thread How to get screen size of device? but it is wrong !, for example for screen size of 3.7 inches returns 2.4 which is very wrong ! Does anybody know how to get the real screen size ?, I do not need the resolution I need the screen size of the screen in inches. NOTE: this code is wrong (at lest doesn't work for me) DisplayMetrics dm = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(dm); int width = dm