Kotlin 经纬度

Question

我拼命地尝试检索我自己的 GPS 位置的坐标，但我的函数总是返回一个 Pair Null，如果你有我感兴趣的解决方案

我在下面尝试这段代码，他只是 Pair Null 返回给我 :( :

此代码获取我的位置并像这样返回纬度和经度 Pair(0.00,0.00) 我在我的清单中拥有所有访问权限。

    private fun getLocation(): Pair<Double, Double>? {
        try {

            val locationManager = getSystemService(LOCATION_SERVICE) as LocationManager
            if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
                // Affiche un message d'erreur et retourne null.
                val builder = AlertDialog.Builder(this)
                builder.setMessage("Please activate your GPS.")
                    .setCancelable(false)
                    .setPositiveButton("Paramètres") { _, _ ->
                        startActivity(Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS))
                    }
                    .setNegativeButton("Cancel") { dialog, _ ->
                        dialog.cancel()
                    }
                val alert = builder.create()
                alert.show()
                return null
            }
            // Verification if GPS is active.
            if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
                // show error
                val builder = AlertDialog.Builder(this)
                builder.setMessage("Please activate your GPS for this fonctionality")
                    .setCancelable(false)
                    .setPositiveButton("Paramètres") { _, _ ->
                        startActivity(Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS))
                    }
                    .setNegativeButton("Annuler") { dialog, _ ->
                        dialog.cancel()
                    }
                val alert = builder.create()
                alert.show()
                return null
            }

            // Verification if the app have all permission
            if (ActivityCompat.checkSelfPermission(
                    this,
                    Manifest.permission.ACCESS_FINE_LOCATION
                ) != PackageManager.PERMISSION_GRANTED
            ) {
                // Ask the authorization for the local position of the user.
                ActivityCompat.requestPermissions(
                    this,
                    arrayOf(Manifest.permission.ACCESS_FINE_LOCATION),
                    1
                )
                return null
            }
           
            val lastKnownLocation =
                locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER)
                    ?: locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER)
                    ?: return null
           
            locationManager.requestLocationUpdates(
                LocationManager.GPS_PROVIDER,
                0,
                0f
            ) { location ->
                println("Location: ${location.latitude}, ${location.longitude}")
            }
            
            val lat = lastKnownLocation.latitude
            val long = lastKnownLocation.longitude
            println("Location getlocation: $lat, $long")
            return Pair(lat, long)
        } catch (ex: SecurityException) {
            // Gérer l'exception SecurityException levée si la permission ACCESS_FINE_LOCATION n'est pas accordée
            println("Security error : ${ex.message}")
            return null
        } catch (ex: Exception) {
            // Gérer les autres exceptions levées par le LocationManager
            println("Cant get location : ${ex.message}")
            return null
        }
    }