使用Xamarin表单获取设备属性? [英] Get Device Properties using Xamarin Forms?

问题描述

我正在使用xamarin表单设计跨平台应用程序. 从后面的代码设计的每个页面/视图/表单.现在，我想读取用户使用的设备的高度和宽度.基于这些值，我想放置一些页眉和页脚.

i'm designing a cross platform app using xamarin forms. every page/view/Form designed from code behind. now i want to read Height and Width of the device used by user. based on those values, i want to place some header and footers.

推荐答案

要获取Xamarin.Forms解决方案中的屏幕宽度(或高度)，我通常添加以下几行代码:

To get the screen width (or height) within a Xamarin.Forms solution, I usually add the following few lines of code:

1. 在共享代码中(最好在App.cs中)定义公共静态属性:

1. Define a public static property in the shared code, preferably in App.cs:

static public int ScreenWidth;

在AppDelegate.cs中的FinishedLaunching开头将其初始化为iOS:

Initialize it for iOS at the beginning of FinishedLaunching in AppDelegate.cs:

App.ScreenWidth = (int)UIScreen.MainScreen.Bounds.Width;

在MainActivity.cs的OnCreate中将其初始化为Android(如此处)

Initialize it for Android in OnCreate of MainActivity.cs (as described here)

App.ScreenWidth = (int)(Resources.DisplayMetrics.WidthPixels / Resources.DisplayMetrics.Density);

(通过除以密度，可以得到与设备无关的像素.)

(By dividing by the density this yields device independent pixels.)

我没有使用Windows Phone，但是应该有一个等效的命令.当然，获得屏幕高度的方法与此类似.

I didn't work with Windows Phone, but there should be an equivalent command. And of course, getting the screen height works similarly.

现在，您可以在代码中的任何地方访问App.ScreenWidth.

Now you can access App.ScreenWidth anywhere in your code.

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