인프런 커뮤니티 질문&답변

MainActivity,locationProvider 코드입니다.

class MainActivity : AppCompatActivity() {

    lateinit var binding : ActivityMainBinding
    lateinit var locationProvider : LocationProvider

    private val PERMISSON_REQUEST_CODE = 100

    val REQUIRED_PERMISSONS = arrayOf(
        Manifest.permission.ACCESS_FINE_LOCATION,
        Manifest.permission.ACCESS_COARSE_LOCATION
    )

    lateinit var getGPSPermissionLauncher: ActivityResultLauncher<Intent>

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityMainBinding.inflate(layoutInflater)
        setContentView(binding.root)

        checkAllPermissions()
        updateUI()
    }

    private fun updateUI(){
        locationProvider = LocationProvider(this@MainActivity)

        val latitude: Double? = locationProvider.getLocationLatitude()
        val longitude: Double? = locationProvider.getLocationLongitude()

        if (latitude != null && longitude != null) {
            val address = getCurrentAddress(latitude, longitude)
            address?.let{
                binding.tvLocationTitle.text = "${it.thoroughfare}" //현재 위치
                binding.tvLocationSubtitle.text = "${it.countryName} ${it.adminArea}"//나라이름
            }
        } else {
            Toast.makeText(this, "위도, 경도를 가져올수 없습니다", Toast.LENGTH_LONG).show()
        }
    }

    private fun getCurrentAddress (latitude : Double, longitude : Double) : Address?{
        val geoCoder = Geocoder(this, Locale.KOREA)
        val addresses : List<Address>

        addresses = try {
            geoCoder.getFromLocation(latitude, longitude, 7)
        } catch (ioException: IOException) {
            Toast.makeText(this, "지오코더 서비스를 이용할수 없습니다.", Toast.LENGTH_LONG).show()
            return null
        } catch (illegalArgumentException: java.lang.IllegalArgumentException) {
            Toast.makeText(this, "잘못된 위도, 경도 입니다.", Toast.LENGTH_LONG).show()
            return null
        }
        if(addresses == null || addresses.size == 0){
            Toast.makeText(this, "주소가 발견되지 않았습니다.", Toast.LENGTH_LONG).show()
            return null
        }
        return addresses[0]
    }
    private fun checkAllPermissions() {
        if(!isLocationServicesAvailable()){
            showDialogForLocationServicesSetting()
        }else{
            isRunTimePermissionsGranted()
        }
    }

    private fun isLocationServicesAvailable(): Boolean {
        val locationManager = getSystemService(LOCATION_SERVICE) as LocationManager

        return (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER) || locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER))
    }

    private fun isRunTimePermissionsGranted() {
        val hasFineLocationPermission = ContextCompat.checkSelfPermission(
            this@MainActivity,
            Manifest.permission.ACCESS_FINE_LOCATION
        )
        val hasCoarseLocationPermission = ContextCompat.checkSelfPermission(
            this@MainActivity,
            Manifest.permission.ACCESS_COARSE_LOCATION
        )

        if (hasFineLocationPermission != PackageManager.PERMISSION_GRANTED || hasCoarseLocationPermission != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(
                this@MainActivity,
                REQUIRED_PERMISSONS,
                PERMISSON_REQUEST_CODE
            )
        }
    }
        override fun onRequestPermissionsResult(
            requestCode: Int,
            permissions: Array<out String>,
            grantResults: IntArray
        ) {
            super.onRequestPermissionsResult(requestCode, permissions, grantResults)
            if (requestCode === PERMISSON_REQUEST_CODE && grantResults.size == REQUIRED_PERMISSONS.size) {
                var checkResult = true

                for (result in grantResults) {
                    if (result != PackageManager.PERMISSION_GRANTED) {
                        checkResult = false
                        break;
                    }
                }
                if (checkResult) {
                    updateUI()

                }else {
                    Toast.makeText(this@MainActivity,"퍼미션이 거부되었습니다. 앱을 다시 실행하여 퍼미션을 허용하십시오", Toast.LENGTH_LONG).show()
                    finish()
                }
            }
        }

    private fun showDialogForLocationServicesSetting() {
        getGPSPermissionLauncher = registerForActivityResult(
            ActivityResultContracts.StartActivityForResult()
        ){
            result ->
            if (result.resultCode == Activity.RESULT_OK) {
                if (isLocationServicesAvailable()) {
                    isRunTimePermissionsGranted()
                }else{
                    Toast.makeText(this@MainActivity,"위치 서비스를 사용할 수 없습니다.", Toast.LENGTH_LONG).show()
                    finish()
                }
            }
        }

        val builder: AlertDialog.Builder = AlertDialog.Builder(this@MainActivity)
        builder.setTitle("위치 서비스 비활성화")
        builder.setMessage("위치 서비스가 꺼져있습니다. 설정해야 앱을 사용할 수 있습니다.")
        builder.setCancelable(true)
        builder.setPositiveButton("설정", DialogInterface.OnClickListener{
            dialogInterface, i -> val callGPSSettingIntent = Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS)
            getGPSPermissionLauncher.launch(callGPSSettingIntent)
        })
        builder.setNegativeButton("취소", DialogInterface.OnClickListener{
            dialogInterface, i -> dialogInterface.cancel()
            Toast.makeText(this@MainActivity,"위치 서비스를 사용할 수 없습니다.", Toast.LENGTH_LONG).show()
            finish()
        })
        builder.create().show()
    }

}

class LocationProvider(val context: Context) {
    private var location: Location? = null
    private var locationManager: LocationManager? = null

    init{
        getLocation()
    }

    private fun getLocation() : Location?{
        try {
            locationManager = context.getSystemService(Context.LOCATION_SERVICE) as LocationManager

            var gpsLocation: Location? = null
            var networkLocation: Location? = null

            var isGPSEnabled = locationManager!!.isProviderEnabled(LocationManager.GPS_PROVIDER)
            var isNetworkEnabled = locationManager!!.isProviderEnabled(LocationManager.NETWORK_PROVIDER)

            if (!isGPSEnabled && !isNetworkEnabled) {
                return null
            }else{
                if (ActivityCompat.checkSelfPermission(
                    context,
                    Manifest.permission.ACCESS_FINE_LOCATION
                ) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(
                    context,
                    Manifest.permission.ACCESS_COARSE_LOCATION
                ) != PackageManager.PERMISSION_GRANTED
            ) {
                return null
            }
                if (isNetworkEnabled) {
                    networkLocation = locationManager?.getLastKnownLocation(LocationManager.NETWORK_PROVIDER)
                }

                if (isGPSEnabled) {
                    gpsLocation = locationManager?.getLastKnownLocation(LocationManager.GPS_PROVIDER)
                }
                if (gpsLocation != null && networkLocation != null) {
                    if (gpsLocation.accuracy > networkLocation.accuracy) {
                        location = gpsLocation
                    }else{
//                        location = networkLocation
                        location = gpsLocation
                    }
                }else{
                    if (gpsLocation != null) {
                        location = gpsLocation
                    }
                    if (networkLocation != null) {
                        location = networkLocation
                    }
                }
            }
        } catch (e: Exception) {
            e.printStackTrace()
        }
        return location
    }

    fun getLocationLatitude(): Double? {
        return location?.latitude
    }
    fun getLocationLongitude(): Double? {
        return location?.longitude
    }
}