Question

我想在我的xamarin安卓应用中使用谷歌地图，但在运行时我收到空引用错误

我完全像我所看到的那样完成所有步骤（Xamarin Android Tutorial 40谷歌地图在youtube上）以及一些如何（https://developer.xamarin.com/guides/android/platform_features/maps_and_location/maps/part_2_-_maps_api/）

清单：

＆＃13;

select *
from (

    select [ADDRESS_GUMF],  -- your big concat 
    row_number() over( partition by A1.NAME order by A1.ADDRESS desc) as ADD_ORD -- Would be better if you had a date or id field in here, replace the order by if you do
    from ADDRESS A1
)
where ADD_ORD = 1

＆＃13;

main.axml就像轰鸣声

＆＃13;

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="App14.App14" android:versionCode="1" android:versionName="1.0" android:installLocation="auto">
	<uses-sdk android:minSdkVersion="15" android:targetSdkVersion="22" />
	<application android:label="App14">
		<meta-data android:name="com.google.android.geo.API_KEY" android:value="@string/google_maps_key" />
		<meta-data android:name="com.google.android.maps.v2.API_KEY" android:value="@string/google_maps_key" />
		<meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" />
	</application>
	<uses-permission android:name="android.permission.INTERNET" />
	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
	<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
	<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
	<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
	<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
</manifest>

＆＃13;

和main.activity是这样的

＆＃13;

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

＆＃13;

我搜索了很多，但没有一个能帮助我。

我想知道你是否帮我解决了我的问题谢谢先进

我在xamarin andoid谷歌地图中收到空引用错误

0 个答案: