将 ActionBar 标题与 Xamarin 中心对齐

Question

我正在使用 Xamarin Forms，我删除了我的图标，现在我想将操作栏标题放在中心，实际上它在左侧。

我看到一些页面说我使用 getSupportActionBar()，但这在我的 Visual Studio 中找不到，我正在尝试在我的 Style.xml 或我的 MainActivity 上删除它。

MainActivity.XML

using System;

using Android.App;
using Android.Content.PM;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;

using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;

namespace App5.Droid
{
    [Activity(Label = "App5", Icon = "@drawable/icon", Theme = "@style/CustomActionBarTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
    public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsApplicationActivity
    {        
        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);            
            global::Xamarin.Forms.Forms.Init(this, bundle);
            ActionBar.SetIcon(Android.Resource.Color.Transparent);
            LoadApplication(new App());
        }

    }
}

样式.xml：

<?xml version="1.0" encoding="utf-8" ?>
<resources>
  <!-- the theme applied to the application or activity -->
  <style name="CustomActionBarTheme"
         parent="@android:style/Theme.Holo.Light">
    <item name="android:actionBarStyle">@style/MyActionBar</item>

  </style>
  <!-- ActionBar styles -->
  <style name="MyActionBar"
         parent="@android:style/Widget.Holo.Light.ActionBar.Solid.Inverse">
  <item name="android:background">#000000</item>

  </style>

</resources>

Answer 1

使用Xamarin，唯一的方法是编程：

LinearLayout lLayout = new LinearLayout(activity);
lLayout .SetGravity(GravityFlags.CenterVertical);
lLayout .LayoutParams textViewParameters = 
                        new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MatchParent, LinearLayout.LayoutParams.MatchParent);
textViewParameters.RightMargin = (int)(30 * activity.Resources.DisplayMetrics.Density);

TextView myTitle = new TextView(activity);        
myTitle.Text = text;
myTitle.Gravity = GravityFlags.Center;
lLayout.AddView(myTitle ,textViewParameters);

ActionBar.LayoutParams actionbarParams = new ActionBar.LayoutParams(ActionBar.LayoutParams.MatchParent,ActionBar.LayoutParams.MatchParent);
activity.ActionBar.SetCustomView(lLayout, actionbarParams);