问快速获取当前位置，并在android中进行一次

EN

public void foo(Context context) {
  // when you need location
  // if inside activity context = this;

  SingleShotLocationProvider.requestSingleUpdate(context, 
   new SingleShotLocationProvider.LocationCallback() {
     @Override public void onNewLocationAvailable(GPSCoordinates location) {
       Log.d("Location", "my location is " + location.toString());
     }
   });
}

public class SingleShotLocationProvider {

  public static interface LocationCallback {
      public void onNewLocationAvailable(GPSCoordinates location);
  }

  // calls back to calling thread, note this is for low grain: if you want higher precision, swap the 
  // contents of the else and if. Also be sure to check gps permission/settings are allowed.
  // call usually takes <10ms
  public static void requestSingleUpdate(final Context context, final LocationCallback callback) {
      final LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
      boolean isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
      if (isNetworkEnabled) {
          Criteria criteria = new Criteria();
          criteria.setAccuracy(Criteria.ACCURACY_COARSE);
          locationManager.requestSingleUpdate(criteria, new LocationListener() {
              @Override
              public void onLocationChanged(Location location) {
                  callback.onNewLocationAvailable(new GPSCoordinates(location.getLatitude(), location.getLongitude()));
              }

              @Override public void onStatusChanged(String provider, int status, Bundle extras) { }
              @Override public void onProviderEnabled(String provider) { }
              @Override public void onProviderDisabled(String provider) { }
          }, null);
      } else {
          boolean isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
          if (isGPSEnabled) {
              Criteria criteria = new Criteria();
              criteria.setAccuracy(Criteria.ACCURACY_FINE);
              locationManager.requestSingleUpdate(criteria, new LocationListener() {
                  @Override
                  public void onLocationChanged(Location location) {
                      callback.onNewLocationAvailable(new GPSCoordinates(location.getLatitude(), location.getLongitude()));
                  }

                  @Override public void onStatusChanged(String provider, int status, Bundle extras) { }
                  @Override public void onProviderEnabled(String provider) { }
                  @Override public void onProviderDisabled(String provider) { }
              }, null);
          }
      }
  }


  // consider returning Location instead of this dummy wrapper class
  public static class GPSCoordinates {
      public float longitude = -1;
      public float latitude = -1;

      public GPSCoordinates(float theLatitude, float theLongitude) {
          longitude = theLongitude;
          latitude = theLatitude;
      }

      public GPSCoordinates(double theLatitude, double theLongitude) {
          longitude = (float) theLongitude;
          latitude = (float) theLatitude;
      }
  }  
}

dependencies {
    ...
    implementation "com.google.android.gms:play-services-location:18.0.0"
    ...
}

<manifest>
    ...
    <!-- required only for LocationRequest.PRIORITY_HIGH_ACCURACY -->
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/> 
    <!-- required for all other priorities -->
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    ...
</manifest>

// To use PRIORITY_HIGH_ACCURACY, you must have ACCESS_FINE_LOCATION permission.
// Any other priority will require just ACCESS_COARSE_LOCATION,
// but will not guarantee a location update
@SuppressLint("MissingPermission")
suspend fun FusedLocationProviderClient.awaitCurrentLocation(priority: Int): Location? {
    return suspendCancellableCoroutine {
        // to use for request cancellation upon coroutine cancellation
        val cts = CancellationTokenSource()
        getCurrentLocation(priority, cts.token)
            .addOnSuccessListener {location ->
                // remember location is nullable, this happens sometimes
                // when the request expires before an update is acquired
                it.resume(location)
            }.addOnFailureListener {e ->
                it.resumeWithException(e)
            }

        it.invokeOnCancellation {
            cts.cancel()
        }
    }
}

// need to register this anywhere before onCreateView, idealy as a field
private val permissionRequester = registerForActivityResult(
    // you can use RequestPermission() contract if you only need 1 permission
    ActivityResultContracts.RequestMultiplePermissions()
) { map ->
    // If you requested 1 permission, change `map` to `isGranted`
    // Keys are permissions Strings, values are isGranted Booleans
    // An easy way to check if "any" permission was granted is map.containsValue(true)
    // You can use your own logic for multiple permissions, 
    // but they have to follow the same checks here:
    val response = map.entries.first()
    val permission = response.key
    val isGranted = response.value
    when {
        isGranted -> onPermissionGranted()
        ActivityCompat.shouldShowRequestPermissionRationale(requireContext(), permission) -> {
            // permission denied but not permanently, tell user why you need it. 
            // Idealy provide a button to request it again and another to dismiss
            AlertDialog.Builder(requireContext())
                .setTitle(R.string.perm_request_rationale_title)
                .setMessage(R.string.perm_request_rationale)
                .setPositiveButton(R.string.request_perm_again) { _, _ -> 
                     requirePermission() 
                }
                .setNegativeButton(R.string.dismiss, null)
                .create()
                .show()
        } 
        else -> {
            // permission permanently denied
            // 1) tell user the app won't work as expected, or
            // 2) take him to your app's info screen to manually change permissions, or
            // 3) silently and gracefully degrade user experience
            // I'll leave the implementation to you
        }
    }
}

private fun onPermissionGranted() {
    val lm = requireContext().getSystemService(Context.LOCATION_SERVICE) as LocationManager
    if(LocationManagerCompat.isLocationEnabled(lm)) {
        // you can do this your own way, eg. from a viewModel
        // but here is where you wanna start the coroutine.
        // Choose your priority based on the permission you required
        val priority = LocationRequest.PRIORITY_HIGH_ACCURACY
        lifecycleScope.launch {
            val location = LocationServices
                .getFusedLocationProviderClient(requireContext())
                .awaitCurrentLocation(priority)
            // do whatever with this location, notice that it's nullable
        }
    } else {
        // prompt user to enable location or launch location settings check
    }
}

private fun requirePermission() {
    val permissions = arrayOf(
        Manifest.permission.ACCESS_FINE_LOCATION,
        // optional: Manifest.permission.ACCESS_COARSE_LOCATION
    )
    permissionRequester.launch(permissions)
}

dependencies {
    ...
    implementation 'com.google.android.gms:play-services-location:15.0.0'
    ...
}

import android.Manifest
import android.annotation.SuppressLint
import android.app.Activity
import android.content.Intent
import android.content.pm.PackageManager
import android.location.Location
import android.net.Uri
import android.os.Looper
import android.provider.Settings
import android.support.v4.app.ActivityCompat
import android.support.v4.content.ContextCompat
import com.google.android.gms.common.api.ApiException
import com.google.android.gms.common.api.ResolvableApiException
import com.google.android.gms.location.*
import org.jetbrains.anko.alert
import org.jetbrains.anko.doAsync
import org.jetbrains.anko.okButton

object LocationService {

    @SuppressLint("StaticFieldLeak")
    private lateinit var fusedLocationProviderClient: FusedLocationProviderClient
    private lateinit var locationRequest: LocationRequest
    private val locationCallback = object : LocationCallback() {
        override fun onLocationResult(locationResult: LocationResult) {
            doAsync {
                location = locationResult.lastLocation
                onSuccess(location)
            }
        }
    }
    private lateinit var onSuccess: (location : Location) -> Unit
    private lateinit var onError: () -> Unit
    lateinit var location: Location

    fun init(activity: Activity) {
        fusedLocationProviderClient = FusedLocationProviderClient(activity)
        locationRequest = LocationRequest().setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY).setInterval(1000).setFastestInterval(1000).setNumUpdates(1)
    }

    private fun checkLocationStatusAndGetLocation(activity: Activity) {
        doAsync {
            when {
                ContextCompat.checkSelfPermission(activity, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED -> LocationServices.getSettingsClient(activity).checkLocationSettings(LocationSettingsRequest.Builder().addLocationRequest(locationRequest).setAlwaysShow(true).build()).addOnCompleteListener { task ->
                    doAsync {
                        try {
                            task.getResult(ApiException::class.java)
                            fusedLocationProviderClient.requestLocationUpdates(locationRequest, locationCallback, Looper.getMainLooper())
                        } catch (exception: ApiException) {
                            when (exception.statusCode) {
                                LocationSettingsStatusCodes.RESOLUTION_REQUIRED -> {
                                    try {
                                        (exception as ResolvableApiException).startResolutionForResult(activity, 7025)
                                    } catch (ex: Exception) {
                                        promptShowLocation(activity)
                                    }
                                }
                                LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE -> {
                                    promptShowLocation(activity)
                                }
                            }
                        }
                    }
                }
                ActivityCompat.shouldShowRequestPermissionRationale(activity, Manifest.permission.ACCESS_FINE_LOCATION) -> activity.runOnUiThread {
                    activity.alert("To continue, allow the device to use location, witch uses Google's Location Service") {
                        okButton {
                            val ite = Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS, Uri.fromParts("package", activity.packageName, null))
                            ite.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
                            activity.startActivity(ite)
                            onError()
                        }
                        negativeButton("Cancelar", { onError() })
                        onCancelled { onError() }
                    }.show()
                }
                else -> ActivityCompat.requestPermissions(activity, arrayOf(Manifest.permission.ACCESS_FINE_LOCATION), 7024)
            }
        }
    }

    private fun promptShowLocation(activity: Activity) {
        activity.runOnUiThread {
            activity.alert("To continue, allow the device to use location, witch uses Google's Location Service") {
                okButton {
                    activity.startActivity(Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS))
                    onError()
                }
                negativeButton("Cancelar", { onError() })
                onCancelled { onError() }
            }.show()
        }
    }

    fun onRequestPermissionsResult(activity: Activity, requestCode: Int, grantResults: IntArray) {
        if (requestCode == 7024) {
            if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                checkLocationStatusAndGetLocation(activity)
            } else {
                onError()
            }
        }
    }

    fun onActivityResult(activity: Activity, requestCode: Int, resultCode: Int) {
        if (requestCode == 7025) {
            if (resultCode == Activity.RESULT_OK) {
                checkLocationStatusAndGetLocation(activity)
            } else {
                onError()
            }
        }
    }

    fun getLocation(activity: Activity, onSuccess: () -> Unit, onError: () -> Unit) {
        this.onSuccess = onSuccess
        this.onError = onError
        checkLocationStatusAndGetLocation(activity)
    }

}

override fun onCreate(savedInstanceState: Bundle?) {
    ...
    LocationService.init(this)
}

override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String>, grantResults: IntArray) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults)
    LocationService.onRequestPermissionsResult(this, requestCode, grantResults)
}

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
    super.onActivityResult(requestCode, resultCode, data)
    LocationService.onActivityResult(this, requestCode, resultCode)
}

private fun yourFunction() {
    LocationService.getLocation(this, { location ->
        //TODO: use the location
    }, {
        //TODO: display error message
    })
}