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FernandoWarBr

Jun 27th, 2025

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package com.fernando.locationweather.ui
import android.Manifest
import android.content.Intent
import android.content.pm.PackageManager
import android.net.Uri
import android.os.Build
import android.os.Bundle
import android.provider.Settings
import android.widget.Toast
import androidx.activity.enableEdgeToEdge
import androidx.activity.result.contract.ActivityResultContracts.RequestPermission
import androidx.activity.viewModels
import androidx.annotation.RequiresApi
import androidx.annotation.RequiresPermission
import androidx.appcompat.app.AlertDialog
import androidx.appcompat.app.AppCompatActivity
import androidx.core.view.ViewCompat
import androidx.core.view.WindowInsetsCompat
import com.fernando.locationweather.R
import com.fernando.locationweather.databinding.ActivityMainBinding
import com.fernando.locationweather.model.Coordinates
import com.fernando.locationweather.ui.adapters.WeatherItemAdapter
import com.fernando.locationweather.ui.viewmodels.WeatherViewModel
import com.fernando.locationweather.ui.viewmodels.WeatherViewModel.PermissionState
import com.google.android.gms.location.FusedLocationProviderClient
import com.google.android.gms.location.LocationServices
import dagger.hilt.android.AndroidEntryPoint
import kotlin.math.roundToInt
@AndroidEntryPoint
@RequiresApi(Build.VERSION_CODES.O)
class MainActivity : AppCompatActivity() {
private var binding: ActivityMainBinding? = null
private val weatherViewModel: WeatherViewModel by viewModels()
private var fusedLocationProviderClient : FusedLocationProviderClient? = null
private var locationPermissionLauncher = registerForActivityResult(RequestPermission()) { isGranted ->
val isShowRequestPermissionDialog = shouldShowRequestPermissionRationale(LOCATION_PERMISSION)
weatherViewModel.onRequestLocationPermission(isGranted, isShowRequestPermissionDialog)
}
companion object {
private const val LOCATION_PERMISSION = Manifest.permission.ACCESS_FINE_LOCATION
}
@RequiresPermission(Manifest.permission.ACCESS_FINE_LOCATION)
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
enableEdgeToEdge()
binding = ActivityMainBinding.inflate(layoutInflater)
setContentView(binding?.root)
setupViewCompat()
initFusedLocationProviderClient()
}
private fun initFusedLocationProviderClient() {
fusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(this)
}
private fun hasLocationPermission() : Boolean {
val hasAccessFineLocationPermission = checkSelfPermission(
Manifest.permission.ACCESS_FINE_LOCATION
) == PackageManager.PERMISSION_GRANTED
return hasAccessFineLocationPermission
}
@RequiresPermission(Manifest.permission.ACCESS_FINE_LOCATION)
override fun onStart() {
super.onStart()
initObservers()
if (!hasLocationPermission()) {
requestLocationPermission()
return
}
weatherViewModel.updateLocationPermissionToGranted()
}
private fun requestLocationPermission() {
locationPermissionLauncher.launch(LOCATION_PERMISSION)
}
private fun openAppSettings() {
val settingsIntent = Intent(
Settings.ACTION_APPLICATION_DETAILS_SETTINGS,
Uri.fromParts("package", packageName, null))
startActivity(settingsIntent)
}
@RequiresPermission(Manifest.permission.ACCESS_FINE_LOCATION)
private fun initObservers() {
weatherViewModel.permissionState.observe(this) { permissionState ->
permissionState?.let { permissionStateNotNull ->
when(permissionStateNotNull) {
PermissionState.GRANTED -> {
updateWeatherLocationInfo()
}
PermissionState.REQUEST_AGAIN -> {
showRequestPermissionAgainDialog()
}
PermissionState.GO_TO_APP_SETTINGS -> {
showGoToAppSettingsDialog()
}
}
}
}
weatherViewModel.weathers.observe(this) { weathers ->
val weatherItemAdapter = WeatherItemAdapter(weathers)
binding?.weathersRecyclerview?.adapter = weatherItemAdapter
}
weatherViewModel.weather.observe(this) { weather ->
binding?.apply {
with(weather) {
dayOfWeekText.text = dayOfWeek.fullName
temperatureText.text = "${temperature.roundToInt()}º"
locationText.text = location.formatWithStateAndCity()
}
}
}
}
private fun showGoToAppSettingsDialog() {
AlertDialog.Builder(this)
.setTitle("Permissão de localizção negada")
.setMessage("Para você usar o app, você precisa ativar a permissão de localização nas configurações do app")
.setCancelable(false)
.setPositiveButton("Abrir configurações") { dialog, _ ->
dialog.dismiss()
openAppSettings()
}
.setNegativeButton("Fechar o app") { dialog, _ ->
dialog.dismiss()
finish()
}.show()
}
private fun showRequestPermissionAgainDialog() {
AlertDialog.Builder(this)
.setTitle("Permissão de localizção negada")
.setMessage("Para você usar o app, você precisa ter a permissão de localização ativada")
.setCancelable(false)
.setPositiveButton("Permitir") { dialog, _ ->
dialog.dismiss()
requestLocationPermission()
}
.setNegativeButton("Cancelar") { dialog, _ ->
dialog.dismiss()
weatherViewModel.onShowAlertAppSettings()
}.show()
}
@RequiresPermission(LOCATION_PERMISSION)
private fun updateWeatherLocationInfo() {
fusedLocationProviderClient?.lastLocation?.addOnSuccessListener { location ->
with(location) {
weatherViewModel.onLocationCoordinatesChange(Coordinates(latitude, longitude))
}
}
}
private fun setupViewCompat() {
ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
insets
}
}
override fun onDestroy() {
super.onDestroy()
binding = null
fusedLocationProviderClient = null
}
}

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