Question

TLDR：是否可以在直接启动模式下访问位置？

我想在手机启动时接收设备的位置更新（在Pixel 3a上进行测试）。这是常规应用程序的一项附带功能，因此请确保已获得必要的权限授予等。

以下代码也摘自从MainActivity调用时可以正常工作的组件。

设置位置回调的步骤如下：

首先，侦听ACTION_LOCKED_BOOT_COMPLETED的DirectBootAware BroadcastReceiver意味着我可以在设备启动时以及屏幕解锁之前运行代码。

[BroadcastReceiver(Enabled = true, Exported = true, DirectBootAware = true)]
[IntentFilter(new string[] { Intent.ActionLockedBootCompleted })]
public class StartForegroundServiceReceiver : BroadcastReceiver
{
    public override void OnReceive(Context context, Intent intent)
    {

从这里我可以验证是否授予了Corse和Fine位置的权限（它们是！）

var permissionCheckResult = context.CheckSelfPermission(Manifest.Permission.AccessFineLocation);

Android.Util.Log.Info("TestingTag", $"AccessFineLocation CheckSelfPermission {permissionCheckResult.ToString()}");


permissionCheckResult = context.CheckSelfPermission(Manifest.Permission.LocationHardware);

Android.Util.Log.Info("TestingTag", $"LocationHardware CheckSelfPermission {permissionCheckResult.ToString()}");


permissionCheckResult = context.CheckSelfPermission(Manifest.Permission.AccessCoarseLocation);

Android.Util.Log.Info("TestingTag", $"AccessCoarseLocation CheckSelfPermission {permissionCheckResult.ToString()}");

并且启用了网络，GPS和被动位置提供程序（同样，它们都已启用！）

var locationManager = (LocationManager)context.GetSystemService(Context.LocationService);

var enabled = locationManager.IsProviderEnabled(LocationManager.PassiveProvider);
Log.Info("TestingTag", $"PassiveProvider IsProviderEnabled {(enabled ? "yes" : "no")}");

enabled = locationManager.IsProviderEnabled(LocationManager.GpsProvider);
Log.Info("TestingTag", $"GpsProvider IsProviderEnabled {(enabled ? "yes" : "no")}");

enabled = locationManager.IsProviderEnabled(LocationManager.NetworkProvider);
Log.Info("TestingTag", $"NetworkProvider IsProviderEnabled {(enabled ? "yes" : "no")}");

如果我选中GetLastKnownLocation

var location = locationManager.GetLastKnownLocation(LocationManager.GpsProvider);

if (location == null)
{
    location = locationManager.GetLastKnownLocation(LocationManager.NetworkProvider);
}

if (location == null)
{
    location = locationManager.GetLastKnownLocation(LocationManager.PassiveProvider);
}

if (location == null)
    Log.Error("TestingTag", $"Location is null");

这总是返回null，也许是因为设备刚刚启动了？还是可能是由于与未收到任何位置更新相同的根本原因？

最后，我使用LocationManager

注册位置更新

var callback = new LocationCallback();

Log.Info("TestingTag", "Starting RequestLocationUpdates via PassiveProvider..");
locationManager.RequestLocationUpdates(LocationManager.PassiveProvider, 3000, 3, callback);

Log.Info("TestingTag", "Starting RequestLocationUpdates via GpsProvider..");
locationManager.RequestLocationUpdates(LocationManager.GpsProvider, 3000, 3, callback);

Log.Info("TestingTag", "Starting RequestLocationUpdates via NetworkProvider..");
locationManager.RequestLocationUpdates(LocationManager.NetworkProvider, 3000, 3, callback);

这是位置回调代码：

public class LocationCallback : ScanCallback, Android.Locations.ILocationListener
{
    public void OnLocationChanged(Location location)
    {
        Log.Info("TestingTag", $"OnLocationChanged {location.Latitude} ~ {location.Longitude}");
    }

    public void OnProviderDisabled(string provider)
    {
        Log.Info("TestingTag", $"OnProviderDisabled {provider}");
    }

    public void OnProviderEnabled(string provider)
    {
        Log.Info("TestingTag", $"OnProviderEnabled {provider}");
    }

    public void OnStatusChanged(string provider, [GeneratedEnum] Availability status, Bundle extras)
    {
        Log.Info("TestingTag", $"OnStatusChanged {provider} ~ {status.ToString()}");
    }
}

永远不会调用回调：-（

我添加了一个BluetoothManager来扫描BLE信号（该代码省略了该代码），并且可以正常工作，ScanResults返回的很好，并且电话/ BroadcastReceiver仍然有效。因此，这似乎不是BroadcastReceiver快要死了...

任何提示/建议/或确认我尝试做的事情都是不可能的，将不胜感激！

谢谢！

Xamarin.Android无法在直接启动模式下接收位置更新

TLDR：是否可以在直接启动模式下访问位置？

0 个答案: