Question

我是xamarin的新手，我需要在应用程序中添加谷歌地图。

我从xamarin下载了这个例子：

https://github.com/xamarin/monodroid-samples/tree/master/MapsAndLocationDemo_v2

经过一些更改之后，它运行了，这个项目显示了地图。

这是有效的项目代码：

/ MainActivity.cs /

using System;
using System.Collections.Generic;
using System.Linq;
using Android.App;
using Android.Content;
using Android.Gms.Common;
using Android.OS;
using Android.Util;
using Android.Views;
using Android.Widget;
using AndroidUri = Android.Net.Uri;

namespace SimpleMapDemo
{
    [Activity(Label = "@string/app_name", MainLauncher = true, Icon = "@drawable/icon")]
    public class MainActivity : Activity
    {
        public static readonly int InstallGooglePlayServicesId = 1000;

        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);
            SetContentView (Resource.Layout.BasicDemo);
        }
    }
}

/ BasicDemo.axml /

<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/map"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    class="com.google.android.gms.maps.MapFragment" />

/ 的AndroidManifest.xml /

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionName="4.0" package="com.xamarin.docs.android.mapsandlocationdemo2" android:versionCode="6">
    <uses-sdk android:targetSdkVersion="14" android:minSdkVersion="14" />
    <!-- Google Maps for Android v2 requires OpenGL ES v2 -->
    <uses-feature android:glEsVersion="0x00020000" android:required="true" />
    <!-- We need to be able to download map tiles and access Google Play Services-->
    <uses-permission android:name="android.permission.INTERNET" />
    <!-- Allow the application to access Google web-based services. -->
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
    <!-- Google Maps for Android v2 will cache map tiles on external storage -->
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <!-- Google Maps for Android v2 needs this permission so that it may check the connection state as it must download data -->
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <!-- These are optional, but recommended. They will allow Maps to use the My Location provider. -->
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <!-- Notice here that we have the package name of our application as a prefix on the permissions. -->
    <uses-permission android:name="com.xamarin.docs.android.mapsandlocationdemo2.permission.MAPS_RECEIVE" />
    <permission android:name="com.xamarin.docs.android.mapsandlocationdemo2.permission.MAPS_RECEIVE" android:protectionLevel="signature" />
    <application android:label="@string/app_name" android:icon="@drawable/icon">
        <!-- Put your Google Maps V2 API Key here. This key will not work for you.-->
        <!-- See https://developers.google.com/maps/documentation/android/start#obtaining_an_api_key -->
        <meta-data android:name="com.google.android.maps.v2.API_KEY" android:value="apikeytest" />
        <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" />
    </application>
</manifest>

问题是，当我尝试将此代码传递给我想要添加地图的现有项目时，在执行它时会抛出异常：

Android.Views.InflateException：二进制XML文件行＃1：错误膨胀类片段

失败的代码：

/ SplashScreen.cs /

using System;
using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;
using System.Threading;

using System.Collections.Generic;
using System.Linq;
using System.Text;
using Cirrious.MvvmCross.Droid.Views;
using Android.Content.PM;

//using Android.Gms.Common;
using AndroidUri = Android.Net.Uri;
using Android.Util;
using Android.Gms.Common;
using Android.Support.V4.App;
using Android.Gms.Maps;


namespace ProjectWithMap
{

    [Activity(
        Label = "ProjectWithMap",
        MainLauncher = true, 
        Icon = "@drawable/icon",
        //Theme ="@style/Theme.Splash",
        ScreenOrientation = ScreenOrientation.Portrait,
        NoHistory = true)]


    public class SplashScreen : Activity
    {
        public static readonly int InstallGooglePlayServicesId = 1000;
        private MapFragment map;

        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);
            SetContentView (Resource.Layout.provaMapa);
        }
    }
}

/ provaMapa.axml /

<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/map"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:name="ProjectWithMap.SplashScreen"
    class="com.google.android.gms.maps.MapFragment" />

/ 的AndroidManifest.xml /

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="projectWithMap.projectWithMap" android:versionCode="6" android:versionName="4.0">
    <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="14" />
    <!-- Google Maps for Android v2 requires OpenGL ES v2 -->
    <uses-feature android:glEsVersion="0x00020000" android:required="true" />
    <!-- We need to be able to download map tiles and access Google Play Services-->
    <uses-permission android:name="android.permission.INTERNET" />
    <!-- Allow the application to access Google web-based services. -->
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
    <!-- Google Maps for Android v2 will cache map tiles on external storage -->
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <!-- Google Maps for Android v2 needs this permission so that it may check the connection state as it must download data -->
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <!-- These are optional, but recommended. They will allow Maps to use the My Location provider. -->
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <!-- Notice here that we have the package name of our application as a prefix on the permissions. -->
    <uses-permission android:name="projectWithMap.projectWithMap.permission.MAPS_RECEIVE" />
    <permission android:name="projectWithMap.projectWithMap.permission.MAPS_RECEIVE" android:protectionLevel="signature" />
    <application android:label="projectWithMap" android:icon="@drawable/Icon" android:theme="@android:style/Theme.NoTitleBar" android:screenOrientation="portrait">
    <!-- Google Maps V2 API Key -->
    <!-- Para más documentación mirar https://developers.google.com/maps/documentation/android/start#obtaining_an_api_key -->
        <meta-data android:name="com.google.android.maps.V2.API_KEY" android:value="key" />
        <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" />
    </application>
</manifest>

这段代码抛出了我的例外：

Android.Views.InflateException：二进制XML文件行＃1：错误膨胀类片段

我不明白为什么在一个项目中工作而在另一个项目中没有，我试图搜索这个错误并找到了多个解决方案，尝试了所有我喜欢的没有好结果......

更改com.google.android.gms.maps.SupportMapFragment的com.google.android.gms.maps.MapFragment

更改公共类SplashScreen：公共类的活动SplashScreen：FragmentActivity

但没有任何效果，总是一样的错误。

我缺少什么？为什么它在一个项目中而不在另一个项目中工作？...

修改

似乎错误在清单中，当我执行时，在应用程序输出处：

<meta-data android:name="com.google.android.maps.V2.API_KEY" android:value="yourKey" />

喜欢它获得谷歌服务的清单......

我加了钥匙！

<meta-data android:name="com.google.android.maps.V2.API_KEY" android:value="key" />

应用程序的清单，应用程序的清单，Google服务的清单是什么？

修改

最后是xamarin或visual studio的错误，删除清单并再次创建它解决了问题。

Answer 1

添加额外的工具

“ Google Play服务”

在Android Sdk Manager中...并且要注意只有一个标签“ application”（拼写正确）

<application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme">
    <meta-data android:name="com.google.android.geo.API_KEY" android:value="@string/mapkey"/>
    <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" />
    <uses-library android:name="org.apache.http.legacy" android:required="false"/>
</application>

Answer 2

向清单文件添加<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>权限。

Xamarin Android谷歌地图片段

2 个答案: