使用XamarinFormsShell时，是否可以在Android上将页面标题居中？

我最近更改为Xamarin Forms，并注意到标题不在Android设备页面的顶部居中。

有办法可以做到吗？

这是标题的示例：

在这种情况下，您将必须实现ShellRenderer，因为您拥有Xamarin.Forms Shell Project。

using System;
using System.Collections.Specialized;
using System.ComponentModel;
using Android.App;
using Android.Content;
using Android.Content.Res;
using Android.Support.V4.Widget;
using Android.Support.V7.Widget;
using Android.Util;
using Android.Widget;
using Japanese.Droid.CustomRenderers;
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;
using Toolbar = Android.Support.V7.Widget.Toolbar;

[assembly: ExportRenderer(typeof(Xamarin.Forms.Shell), typeof(MyShellRenderer))]
namespace MyProject.Droid.CustomRenderers
{
    public class MyShellRenderer : ShellRenderer
    {
        public MyShellRenderer(Context context) : base(context)
        {
        }

        protected override IShellToolbarAppearanceTracker CreateToolbarAppearanceTracker()
        {
            return new MyShellToolbarAppearanceTracker(this);
        }

        protected override IShellToolbarTracker CreateTrackerForToolbar(Toolbar toolbar)
        {
            return new MyShellToolbarTracker(this, toolbar, ((IShellContext)this).CurrentDrawerLayout);
        }
    }

    public class MyShellToolbarAppearanceTracker : ShellToolbarAppearanceTracker
    {
        public MyShellToolbarAppearanceTracker(IShellContext context) : base(context)
        {
        }

        public override void SetAppearance(Android.Support.V7.Widget.Toolbar toolbar, IShellToolbarTracker toolbarTracker, ShellAppearance appearance)
        {
            base.SetAppearance(toolbar, toolbarTracker, appearance);
            //Change the following code to change the icon of the Header back button.

            toolbar?.SetNavigationIcon(Resource.Drawable.back);
        }
    }

    public class MyShellToolbarTracker : ShellToolbarTracker
    {
        public MyShellToolbarTracker(IShellContext shellContext, Toolbar toolbar, DrawerLayout drawerLayout) : base(shellContext, toolbar, drawerLayout)
        {
        }

        protected override void UpdateTitleView(Context context, Toolbar toolbar, View titleView)
        {
            base.UpdateTitleView(context, toolbar, titleView);
            for (int index = 0; index 

这是MainActivity.cs的代码

public class MainActivity : FormsAppCompatActivity
{
    public static DisplayMetrics displayMetrics;

    protected override void OnCreate(Bundle savedInstanceState)
    {
        Window.AddFlags(WindowManagerFlags.Fullscreen);

        base.OnCreate(savedInstanceState);
        Xamarin.Essentials.Platform.Init(this, savedInstanceState);
        global::Xamarin.Forms.Forms.Init(this, savedInstanceState);

        displayMetrics = new DisplayMetrics();
        WindowManager.DefaultDisplay.GetRealMetrics(displayMetrics);

        LoadApplication(new App());

        if (Window != null) Window.SetStatusBarColor(Android.Graphics.Color.Transparent);
        if (isPhone(this)) RequestedOrientation = ScreenOrientation.Portrait;

    }
}

        

2> Roubachof..：
您可以使用TitleView：




    
        
    

        
        
            
            
        
    




https://www.andrewhoefling.com/Blog/Post/xamarin-forms-title-view-a-powerful-navigation-view