Android/Xamarin项目中的自定义主题 - 操作栏的中心标题文本

Question

我在Android/Xamarin项目中有自定义主题.我不能做的是:

• 将标题设置为中间(并删除图标)
• 添加带菜单选项的菜单按钮(例如按钮设置)

我尝试过设置属性 - >重力到中心,但它不起作用.

    <?xml version="1.0" encoding="utf-8"?>
<resources>
  <!-- the theme applied to the application or activity -->
  <style name="AgrippaTheme"
         parent="@android:style/Theme.Holo.Light.DarkActionBar">
    <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">@color/main_orange_color</item>
    <item name="android:titleTextStyle">@style/AgrippaTheme.TitleTextStyle</item>
  </style>

  <!-- ActionBar TitleTextStyle styles -->
  <style name="AgrippaTheme.TitleTextStyle" parent="@android:style/TextAppearance.Holo.Widget.ActionBar.Title">
    <item name="android:textColor">@color/main_black_color</item>
    <item name="android:gravity">center_vertical|center_horizontal</item>
  </style>
</resources>

Answer 1

您必须通过静态类中的静态方法以编程方式执行此操作

public static void SetActionbarText(Activity activity, string text)
        {
            // Setting custom view enable
            activity.ActionBar.SetHomeButtonEnabled(false);
            activity.ActionBar.SetIcon(Android.Resource.Color.Transparent);
            activity.ActionBar.SetDisplayShowCustomEnabled(true);
            activity.ActionBar.Title = "";

            LinearLayout linearLayout = new LinearLayout(activity);
            linearLayout.SetGravity(GravityFlags.CenterVertical);
            LinearLayout.LayoutParams textViewParameters = 
                new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MatchParent, LinearLayout.LayoutParams.MatchParent);
            textViewParameters.RightMargin = (int)(40 * activity.Resources.DisplayMetrics.Density);
            TextView modelTitle = new TextView(activity);        
            modelTitle.Text = text;
            modelTitle.Gravity = GravityFlags.Center;
            linearLayout.AddView(modelTitle,textViewParameters);
            ActionBar.LayoutParams actionbarParams = 
                new ActionBar.LayoutParams(ActionBar.LayoutParams.MatchParent,ActionBar.LayoutParams.MatchParent);
            activity.ActionBar.SetCustomView(linearLayout, actionbarParams);
        }

请注意,您必须使用文本的右边距维度.此边距应该等于主图标的宽度(它在那里,但它是不可见的).

您可以添加正确的图标,将其添加到Menu.xml上,并在活动的OnCreateOptionsMenu方法中膨胀此xml文件.