.NET MAUI Android模拟器中Geolocation.Default.GetLocationAsync()调用后挂起

云上老周

2026-8-11

问题描述

已在AndroidManifest.xml中添加如下配置：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android">
<application android:allowBackup="true" android:icon="@mipmap/appicon" android:roundIcon="@mipmap/appicon_round" android:supportsRtl="true" android:usesCleartextTraffic="true">
    <meta-data android:name="com.google.android.geo.API_KEY" android:value="12345" />
    <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" />
</application>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-feature android:name="android.hardware.location" android:required="false" />
<uses-feature android:name="android.hardware.location.gps" android:required="false" />
<uses-feature android:name="android.hardware.location.network" android:required="false" />
</manifest>

运行以下定位代码时：

try
{
    _isCheckingLocation = true;

    GeolocationRequest request = new GeolocationRequest(GeolocationAccuracy.Medium, TimeSpan.FromSeconds(10));

    _cancelTokenSource = new CancellationTokenSource();

    Location location = await Geolocation.Default.GetLocationAsync(request, _cancelTokenSource.Token);

    if (location != null)
    {
        Console.WriteLine($"Latitude: {location.Latitude}, Longitude: {location.Longitude}, Altitude: {location.Altitude}");
        return location;
    }
}
// Catch one of the following exceptions:
//   FeatureNotSupportedException
//   FeatureNotEnabledException
//   PermissionException
catch (FeatureNotSupportedException fnsEx)
{
    // Handle not supported on device exception
    err = fnsEx.Message;
}
catch (FeatureNotEnabledException fneEx)
{
    // Handle not enabled on device exception
    err = fneEx.Message;
}
catch (PermissionException pEx)
{
    // Handle permission exception
    err = pEx.Message;
}
catch (Exception ex)
{
    // Unable to get location
    err = ex.Message;
}
finally
{
    _isCheckingLocation = false;
}

模拟器弹出定位权限请求，点击允许后，调试流程无返回、无任何错误抛出，程序陷入无响应状态。

解决方案

补全动态权限申请：Android 6.0+仅在Manifest声明权限不够，需在调用定位前主动请求权限。执行await Permissions.RequestAsync<Permissions.LocationWhenInUse>()，确认返回PermissionStatus.Granted后再调用GetLocationAsync。
设置模拟器模拟位置：部分模拟器默认无定位数据，需手动在模拟器的定位设置中添加模拟坐标，或用ADB命令注入：
```
adb shell am set-location 39.904200 116.407400
```
调整定位参数：尝试降低精度（比如GeolocationAccuracy.Low）并缩短超时时间，避免模拟器因无法快速获取高精度位置导致阻塞。
排查主线程死锁：确保调用该定位方法的上层函数标记为async，避免使用.Result或.Wait()同步等待，防止主线程被阻塞。
验证Google Play服务：模拟器需安装对应版本的Google Play服务，可在模拟器设置中检查服务状态，定位依赖该服务正常运行。
强化取消逻辑：可在超时后手动触发_cancelTokenSource.Cancel()，确保即使定位无响应也能终止等待流程。

内容的提问来源于stack exchange，提问作者Cef