如何修复“解析XML时出错：未关闭的令牌（APT0000）”？ （Xamarin.Forms）

Question

So Im currently trying to figure out how to work with platform specific code. iOS works just fine. But Android is making me problems and I dont know how to fix it.

When running the same code on an iOS emulator my code works but running the same code on an Android Emulator it gives me the error "Error parsing XML: unclosed token (APT0000)". Does anyone know why it happens and how to fix this?

xaml:

<?xml version="1.0" encoding="UTF-8"?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" x:Class="BookCodeSL.PlatInfoSap1">


    <StackLayout Padding="20">
        <StackLayout VerticalOptions="CenterAndExpand">
            <Label Text="Device Model:"/>

            <ContentView Padding="50,0,0,0">
                <Label x:Name="modelLabel"
                       FontSize="Large"
                       FontAttributes="Bold"/>
            </ContentView>
        </StackLayout>

        <StackLayout VerticalOptions="CenterAndExpand">
            <Label Text="Operating System Version:"/>

            <ContentView Padding="50,0,0,0">
                <Label x:Name="versionLabel"
                       FontSize="Large"
                       FontAttributes="Bold"/>
            </ContentView>
        </StackLayout>
    </StackLayout>
</ContentPage>

cs:

//...
#elif __ANDROID__
using Android.OS;

//...

    public partial class PlatInfoSap1 : ContentPage
    {
        public PlatInfoSap1()
        {
            InitializeComponent();

#if __IOS__

            UIDevice device = new UIDevice();
            modelLabel.Text = device.Model.ToString();
            versionLabel.Text = String.Format("{0} {1}", device.SystemName, device.SystemVersion);

#elif __ANDROID__
            modelLabel.Text = String.Format("{0} {1}", Build.Manufacturer, Build.Model);


  versionLabel.Text = Build.VERSION.Release.ToString();

#endif
    }
}

edit

The error can be found in

abc_primary_text_disable_only_material_light.xml

this is the code to it:

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2014 The Android Open Source Project

     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at

          http://www.apache.org/licenses/LICENSE-2.0

     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,
     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND

Answer 1

Are you missing some codes in the abc_primary_text_disable_only_material_light.xml ?

It should be:

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2014 The Android Open Source Project
     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at
          http://www.apache.org/licenses/LICENSE-2.0
     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,
     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     See the License for the specific language governing permissions and
     limitations under the License.
-->
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_enabled="false" android:color="@color/bright_foreground_disabled_material_light"/>
    <item android:color="@color/bright_foreground_material_light"/>
</selector>

Answer 2

It seems that your XML is not a valid XML. Please make sure that you close every XML property, for example, the most obvious in your XML file the

<ContentPage ...>
...
</ContentPage>

This can help you with that, https://www.xmlvalidation.com/