Xamarin.Forms 启动App时获取屏幕宽高

启动App时获取屏幕宽高

App.cs里面添加：

public static double ScreenWidth;

public static double ScreenHeight;

Android下 MainActivity.cs里面添加：

protected override void OnCreate(Bundle bundle)

{

TabLayoutResource = Resource.Layout.Tabbar;

ToolbarResource = Resource.Layout.Toolbar;

 

base.OnCreate(bundle);

 

global::Xamarin.Forms.Forms.Init(this, bundle);

 

 

var width = Resources.DisplayMetrics.WidthPixels;

var height = Resources.DisplayMetrics.HeightPixels;

var density = Resources.DisplayMetrics.Density; //屏幕密度

 

App.ScreenWidth = width / density; //屏幕宽度

App.ScreenHeight = height / density; //屏幕高度 含24个单位的标题栏高度 通过OnSizeAllocated获取的高度不含标题栏高度

 

LoadApplication(new App());

}

IOS下 AppDelegate.cs里面添加：

public override bool FinishedLaunching(UIApplication app, NSDictionary options)

{

global::Xamarin.Forms.Forms.Init();

 

App.ScreenWidth = UIScreen.MainScreen.Bounds.Width; //屏幕宽度

App.ScreenHeight = UIScreen.MainScreen.Bounds.Height; //屏幕高度

 

LoadApplication(new App());

 

return base.FinishedLaunching(app, options);

}