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How to change the status bar color without a navigation page

由 拟墨画扇 提交于 2020-12-31 04:38:18

问题


I want to change the status bar color on some views.

I found this solution https://github.com/yuv4ik/XFDynamicStatusBarAppearance

but it's working only with NavigationPage.

I don't need from my app Navigation Page ...

    public App()
    {
        InitializeComponent();

        MainPage = new MainPage();
    }

Here is my try ...

    var statusBarStyleManager = DependencyService.Get<IStatusBarStyleManager>();

    MainCarousel.PositionChanged += (sender, e) =>
    {
        switch (e.CurrentPosition)
        {
            case 1:
                Device.BeginInvokeOnMainThread(() =>
                {
                    Xamarin.Forms.Application.Current.MainPage.SetValue(Xamarin.Forms.NavigationPage.BarBackgroundColorProperty, Color.DarkCyan);

                    //((Xamarin.Forms.NavigationPage)Xamarin.Forms.Application.Current.MainPage).BarBackgroundColor = Color.DarkCyan;
                    statusBarStyleManager.SetDarkTheme();
                });
                break;
            case 0:
            case 2:
                Device.BeginInvokeOnMainThread(() =>
                {
                    Xamarin.Forms.Application.Current.MainPage.SetValue(Xamarin.Forms.NavigationPage.BarBackgroundColorProperty, Color.LightGreen);
                    statusBarStyleManager.SetLightTheme();
                });
                break;
            default:
                break;
        }
    };

How can I change the status bar color ?


回答1:


Here is my working solution on both platforms ...

public interface IStatusBarStyleManager
{
    void SetColoredStatusBar(string hexColor);
    void SetWhiteStatusBar();
}

Setup the Status bar color with this line

DependencyService.Get<IStatusBarStyleManager>().SetColoredStatusBar("#2196F3");

or you can keep it white with black font color

DependencyService.Get<IStatusBarStyleManager>().SetWhiteStatusBar();

Android

[assembly: Xamarin.Forms.Dependency(typeof(StatusBarStyleManager))]
namespace ShaXam.Droid.DependencyServices
{
    public class StatusBarStyleManager : IStatusBarStyleManager
    {
        public void SetColoredStatusBar(string hexColor)
        {
            if (Build.VERSION.SdkInt >= BuildVersionCodes.M)
            {
                Device.BeginInvokeOnMainThread(() =>
                {
                    var currentWindow = GetCurrentWindow();
                    currentWindow.DecorView.SystemUiVisibility = 0;
                    currentWindow.SetStatusBarColor(Android.Graphics.Color.ParseColor(hexColor);
                });
            }
        }

        public void SetWhiteStatusBar()
        {
            if (Build.VERSION.SdkInt >= BuildVersionCodes.M)
            {
                Device.BeginInvokeOnMainThread(() =>
                {
                    var currentWindow = GetCurrentWindow();
                    currentWindow.DecorView.SystemUiVisibility = (StatusBarVisibility)SystemUiFlags.LightStatusBar;
                    currentWindow.SetStatusBarColor(Android.Graphics.Color.White);
                });
            }
        }

        Window GetCurrentWindow()
        {
            var window = CrossCurrentActivity.Current.Activity.Window;

            // clear FLAG_TRANSLUCENT_STATUS flag:
            window.ClearFlags(WindowManagerFlags.TranslucentStatus);

            // add FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS flag to the window
            window.AddFlags(WindowManagerFlags.DrawsSystemBarBackgrounds);

            return window;
        }
    }
}

iOS

[assembly: Dependency(typeof(StatusBarStyleManager))]
namespace ShaXam.iOS.DependencyServices
{
    public class StatusBarStyleManager : IStatusBarStyleManager
    {
        public void SetColoredStatusBar(string hexColor)
        {
            Device.BeginInvokeOnMainThread(() =>
            {
                UIView statusBar = UIApplication.SharedApplication.ValueForKey(new NSString("statusBar")) as UIView;
                if (statusBar.RespondsToSelector(new ObjCRuntime.Selector("setBackgroundColor:")))
                {
                    statusBar.BackgroundColor = Color.FromHex(hexColor).ToUIColor();
                }
                UIApplication.SharedApplication.SetStatusBarStyle(UIStatusBarStyle.LightContent, false);
                GetCurrentViewController().SetNeedsStatusBarAppearanceUpdate();
            });
        }

        public void SetWhiteStatusBar()
        {
            Device.BeginInvokeOnMainThread(() =>
            {
                UIView statusBar = UIApplication.SharedApplication.ValueForKey(new NSString("statusBar")) as UIView;
                if (statusBar.RespondsToSelector(new ObjCRuntime.Selector("setBackgroundColor:")))
                {
                    statusBar.BackgroundColor = UIColor.White;
                }
                UIApplication.SharedApplication.SetStatusBarStyle(UIStatusBarStyle.Default, false);
                GetCurrentViewController().SetNeedsStatusBarAppearanceUpdate();
            });
        }

        UIViewController GetCurrentViewController()
        {
            var window = UIApplication.SharedApplication.KeyWindow;
            var vc = window.RootViewController;
            while (vc.PresentedViewController != null)
                vc = vc.PresentedViewController;
            return vc;
        }
    }
}

POST UPDATED TO SUPPORT THE IOS 13

[assembly: Dependency(typeof(StatusBarStyleManager))]
namespace ShaXam.iOS.DependencyServices
{
    public class StatusBarStyleManager : IStatusBarStyleManager
    {
        public void SetColoredStatusBar(string hexColor)
        {
            Device.BeginInvokeOnMainThread(() =>
            {
                if (UIDevice.CurrentDevice.CheckSystemVersion(13, 0))
                {
                    UIView statusBar = new UIView(UIApplication.SharedApplication.KeyWindow.WindowScene.StatusBarManager.StatusBarFrame);
                    statusBar.BackgroundColor = Color.FromHex(hexColor).ToUIColor();
                    UIApplication.SharedApplication.KeyWindow.AddSubview(statusBar);
                }
                else
                {
                    UIView statusBar = UIApplication.SharedApplication.ValueForKey(new NSString("statusBar")) as UIView;
                    if (statusBar.RespondsToSelector(new ObjCRuntime.Selector("setBackgroundColor:")))
                    {
                        statusBar.BackgroundColor = Color.FromHex(hexColor).ToUIColor();
                    }
                }
                UIApplication.SharedApplication.SetStatusBarStyle(UIStatusBarStyle.LightContent, false);
                GetCurrentViewController().SetNeedsStatusBarAppearanceUpdate();
            });
        }

        public void SetWhiteStatusBar()
        {
            Device.BeginInvokeOnMainThread(() =>
            {
                if (UIDevice.CurrentDevice.CheckSystemVersion(13, 0))
                {
                    UIView statusBar = new UIView(UIApplication.SharedApplication.KeyWindow.WindowScene.StatusBarManager.StatusBarFrame);
                    statusBar.BackgroundColor = UIColor.White;
                    UIApplication.SharedApplication.KeyWindow.AddSubview(statusBar);
                }
                else
                {
                    UIView statusBar = UIApplication.SharedApplication.ValueForKey(new NSString("statusBar")) as UIView;
                    if (statusBar.RespondsToSelector(new ObjCRuntime.Selector("setBackgroundColor:")))
                    {
                        statusBar.BackgroundColor = UIColor.White;
                    }
                }
                UIApplication.SharedApplication.SetStatusBarStyle(UIStatusBarStyle.DarkContent, false);
                GetCurrentViewController().SetNeedsStatusBarAppearanceUpdate();
            });
        }

        UIViewController GetCurrentViewController()
        {
            var window = UIApplication.SharedApplication.KeyWindow;
            var vc = window.RootViewController;
            while (vc.PresentedViewController != null)
                vc = vc.PresentedViewController;
            return vc;
        }
    }
}

The full working sample is here https://github.com/georgemichailou/ShaXam




回答2:


You can try add this code in Android platform, OnCreate method:

 protected override void OnCreate(Bundle savedInstanceState)
    {
        TabLayoutResource = Resource.Layout.Tabbar;
        ToolbarResource = Resource.Layout.Toolbar;

        base.OnCreate(savedInstanceState);

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

        LoadApplication(new App());
       Window.SetStatusBarColor(Android.Graphics.Color.Argb(255, 0, 0, 0)); //here

    }

Please note SetStatusBarColor is only supported in API level 21 and up. Therefore, we should check for this before calling SetStatusBarColor. 

if (Android.OS.Build.VERSION.SdkInt >= BuildVersionCodes.Lollipop)

  {
   Window.SetStatusBarColor(...);
  }

Update:

Create interface in PCL:

public  interface IStatusBarColor
{
    void changestatuscolor(string color);
}

Now, Mainactivity implement this interface.

[assembly: Dependency(typeof(demo2.Droid.MainActivity))]
 namespace demo2.Droid
 {
[Activity(Label = "demo2", Icon = "@mipmap/icon", Theme = "@style/MainTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity,IStatusBarColor
{

    public static Context context;
    protected override void OnCreate(Bundle savedInstanceState)
    {
        TabLayoutResource = Resource.Layout.Tabbar;
        ToolbarResource = Resource.Layout.Toolbar;

        base.OnCreate(savedInstanceState);

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

        LoadApplication(new App());

    }



    public void changestatuscolor(string color)
    {
        if (Build.VERSION.SdkInt >= BuildVersionCodes.Lollipop)
        {
            var c = MainActivity.context as FormsAppCompatActivity;
            c?.RunOnUiThread(() => c.Window.SetStatusBarColor(Android.Graphics.Color.ParseColor(color)));
        }

    }
    protected override void OnResume()
    {
        context = this;
        base.OnResume();
    }

}

}

In Mainpage, to change status bar color in Button click event.

 private void Changecolor_Clicked(object sender, EventArgs e)
    {
        DependencyService.Get<IStatusBarColor>().changestatuscolor(Color.Red.ToHex());
    }




回答3:


Answer from @Cherry Bu - MSFT is great, but a bit outdated. SystemUiVisibility is obsolete in Android 11, so here is updated StatusBarStyleManager compatible with new API:

using Android.Graphics;
using Android.OS;
using Android.Views;
using Plugin.CurrentActivity;
using Xamarin.Essentials;

[assembly: Xamarin.Forms.Dependency(typeof(StatusBarStyleManager))]
namespace YourApp.Droid.Dependences
{
    public class StatusBarStyleManager : IStatusBarStyleManager
    {
        public void SetColoredStatusBar(string hexColor)
        {
            if (Build.VERSION.SdkInt < BuildVersionCodes.M)
            {
                return;
            }

            MainThread.BeginInvokeOnMainThread(() =>
            {
                var currentWindow = GetCurrentWindow();
                SetStatusBarIsLight(currentWindow, false);
                currentWindow.SetStatusBarColor(Color.ParseColor(hexColor));
                currentWindow.SetNavigationBarColor(Color.ParseColor(hexColor));
            });
        }

        public void SetWhiteStatusBar()
        {
            if (Build.VERSION.SdkInt < BuildVersionCodes.M)
            {
                return;
            }

            MainThread.BeginInvokeOnMainThread(() =>
            {
                var currentWindow = GetCurrentWindow();
                SetStatusBarIsLight(currentWindow, true);
                currentWindow.SetStatusBarColor(Color.White);
                currentWindow.SetNavigationBarColor(Color.White);
            });
        }

        private static void SetStatusBarIsLight(Window currentWindow, bool isLight)
        {
            if ((int)Build.VERSION.SdkInt < 30)
            {
#pragma warning disable CS0618 // Type or member is obsolete. Using new API for Sdk 30+
                currentWindow.DecorView.SystemUiVisibility = isLight ? (StatusBarVisibility)(SystemUiFlags.LightStatusBar) : 0;
#pragma warning restore CS0618 // Type or member is obsolete
            }
            else
            {
                var lightStatusBars = isLight ? WindowInsetsControllerAppearance.LightStatusBars : 0;
                currentWindow.InsetsController?.SetSystemBarsAppearance((int)lightStatusBars, (int)lightStatusBars);
            }
        }

        private Window GetCurrentWindow()
        {
            Window window = Platform.CurrentActivity.Window;
            window.ClearFlags(WindowManagerFlags.TranslucentStatus);
            window.AddFlags(WindowManagerFlags.DrawsSystemBarBackgrounds);
            return window;
        }
    }
}

Side note: if you also want to change color of status bar, here are lines that you need to change:

  • currentWindow.DecorView.SystemUiVisibility = isLight ? (StatusBarVisibility)(SystemUiFlags.LightStatusBar | SystemUiFlags.LightNavigationBar) : 0;
  • var lightStatusBars = isLight ? WindowInsetsControllerAppearance.LightStatusBars | WindowInsetsControllerAppearance.LightNavigationBars : 0;


来源：https://stackoverflow.com/questions/58441077/how-to-change-the-status-bar-color-without-a-navigation-page

标签
c#
Xamarin
xamarin.forms
xamarin.android
xamarin.ios
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