android - Android Kotlin - 无法设置位置。位置保持在 0.0, 0.0
问题描述
我正在尝试设置该位置的纬度和经度，以便我可以使用 API 来获取天气信息。
当我运行应用程序时，我没有收到任何错误，但位置是 0.0、0.0。默认位置显示在应用程序中。
我已经确定我也在检查/请求位置许可。
这是 Kotlin 中的代码。我已经实现'com.google.android.gms:play-services-location:17.1.0，kotlin-android-extensions在 gradle 中添加，并添加了粗略、精细的位置权限和互联网权限。
这是我在 MainActivity.kt 中的位置部分
@SuppressLint("MissingPermission")
private fun getLastLocation() {
if(CheckPermission()){
if(isLocationEnabled()){
fusedLocationProviderClient.lastLocation.addOnCompleteListener{task ->
var location = task.result
if(location == null){
getNewLocation()
}else {
locationResult = location
}
}
}else{
Toast.makeText(this, "Location service not enabled", Toast.LENGTH_SHORT).show()
}
}else{
RequestPermission()
}
}
private fun CheckPermission() : Boolean {
if( (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED)
|| (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED) ){
return true
}
return false
}
private fun RequestPermission() {
ActivityCompat.requestPermissions(
this,
arrayOf(
Manifest.permission.ACCESS_FINE_LOCATION,
Manifest.permission.ACCESS_COARSE_LOCATION
), PERMISSION_ID
)
}
private fun isLocationEnabled() : Boolean{
var locationManager = getSystemService(Context.LOCATION_SERVICE) as LocationManager
return locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER) || locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)
}
override fun onRequestPermissionsResult(
requestCode: Int,
permissions: Array<out String>,
grantResults: IntArray
) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults)
if (requestCode == PERMISSION_ID){
if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED){
Log.d(TAG, "Permission granted")
}
}
}
@SuppressLint("MissingPermission")
private fun getNewLocation(){
locationRequest = LocationRequest()
locationRequest.priority = LocationRequest.PRIORITY_HIGH_ACCURACY
locationRequest.interval = 0
locationRequest.fastestInterval = 0
locationRequest.numUpdates = 2
fusedLocationProviderClient!!.requestLocationUpdates(
locationRequest, locationCallback, null
)
}
private val locationCallback = object : LocationCallback() {
override fun onLocationResult(p0: LocationResult?){
var lastLocation = p0?.lastLocation
if (lastLocation != null) {
locationResult = lastLocation
}
}
}
MainActivity.kt -- 已满
package <censored>.weatherapp
import android.Manifest
import android.annotation.SuppressLint
import android.content.Context
import android.content.pm.PackageManager
import android.location.Location
import android.location.LocationManager
import android.os.AsyncTask
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.util.Log
import android.view.View
import android.widget.ProgressBar
import android.widget.RelativeLayout
import android.widget.TextView
import android.widget.Toast
import androidx.core.app.ActivityCompat
import com.google.android.gms.location.*
import com.squareup.picasso.Picasso
import kotlinx.android.synthetic.main.activity_main.*
import org.json.JSONObject
import java.lang.Exception
import java.net.URL
import java.text.SimpleDateFormat
import java.util.*
class MainActivity : AppCompatActivity() {
companion object {
val API : String = "<censored>"
private var PERMISSION_ID : Int = 1000
val TAG = "MainActivity"
}
lateinit var fusedLocationProviderClient: FusedLocationProviderClient
lateinit var locationRequest : LocationRequest
lateinit var locationResult : Location
var latitude : Double = 0.0
var longitude : Double = 0.0
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
fusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(this)
getLastLocation()
weatherTask().execute()
}
inner class weatherTask() : AsyncTask<String, Void, String>() {
override fun onPreExecute() {
super.onPreExecute()
//Showing the ProgressBar, making the main design gone
findViewById<ProgressBar>(R.id.loader).visibility = View.VISIBLE
findViewById<RelativeLayout>(R.id.mainContainer).visibility = View.GONE
}
override fun doInBackground(vararg params: String?): String? {
latitude = locationResult.latitude
longitude = locationResult.longitude
Log.d(TAG, "$latitude , $longitude")
var response : String?
try{
response = URL("https://api.openweathermap.org/data/2.5/weather?lat=$latitude&lon=$longitude&units=metric&appid=$API")
.readText(Charsets.UTF_8)
}catch (e: Exception){
response = null
}
return response
}
override fun onPostExecute(result: String?) {
super.onPostExecute(result)
try {
// Extracting JSON returns from the API
val jsonObj = JSONObject(result)
val main = jsonObj.getJSONObject("main")
val sys = jsonObj.getJSONObject("sys")
val wind = jsonObj.getJSONObject("wind")
val weather = jsonObj.getJSONArray("weather").getJSONObject(0)
val updatedAt:Long = jsonObj.getLong("dt")
val updatedAtText = "Updated at: "+ SimpleDateFormat("dd/MM/yyyy H:mm ", Locale.ENGLISH).format(Date(updatedAt*1000))
val temp = main.getDouble("temp").toInt().toString()
val tempMin = main.getDouble("temp_min").toInt().toString()
val tempMax = main.getDouble("temp_max").toInt().toString()
val tempText = "$temp°C"
val tempMinText = "Min Temp: $tempMin°C"
val tempMaxText = "Max Temp: $tempMax°C"
val pressure = main.getString("pressure")
val humidity = main.getString("humidity")
val sunrise:Long = sys.getLong("sunrise")
val sunset:Long = sys.getLong("sunset")
val windSpeed = wind.getDouble("speed").toInt()
val weatherDescription = weather.getString("description")
val address = jsonObj.getString("name")+", "+sys.getString("country")
val icon = weather.getString("icon")
val conditionUrl = "https://openweathermap.org/img/wn/$icon@2x.png"
// Populating extracted data into our views
Picasso.get().load(conditionUrl).into(condition_imageView)
findViewById<TextView>(R.id.address).text = address
findViewById<TextView>(R.id.updated_at).text = updatedAtText
findViewById<TextView>(R.id.status).text = weatherDescription.capitalize()
findViewById<TextView>(R.id.temp).text = tempText
findViewById<TextView>(R.id.temp_min).text = tempMinText
findViewById<TextView>(R.id.temp_max).text = tempMaxText
findViewById<TextView>(R.id.sunrise).text = SimpleDateFormat("HH:mm", Locale.ENGLISH).format(Date(sunrise * 1000))
findViewById<TextView>(R.id.sunset).text = SimpleDateFormat("HH:mm", Locale.ENGLISH).format(Date(sunset * 1000))
findViewById<TextView>(R.id.wind).text = "$windSpeed km/h"
findViewById<TextView>(R.id.pressure).text = "$pressure mb"
findViewById<TextView>(R.id.humidity).text = "$humidity %"
// Views populated, hiding the loader, showing the main design
findViewById<ProgressBar>(R.id.loader).visibility = View.GONE
findViewById<RelativeLayout>(R.id.mainContainer).visibility = View.VISIBLE
}
catch (e: Exception){
findViewById<ProgressBar>(R.id.loader).visibility = View.GONE
findViewById<TextView>(R.id.errorText).visibility = View.VISIBLE
}
}
}
@SuppressLint("MissingPermission")
private fun getLastLocation() {
if(CheckPermission()){
if(isLocationEnabled()){
fusedLocationProviderClient.lastLocation.addOnCompleteListener{task ->
var location = task.result
if(location == null){
getNewLocation()
}else {
locationResult = location
}
}
}else{
Toast.makeText(this, "Location service not enabled", Toast.LENGTH_SHORT).show()
}
}else{
RequestPermission()
}
}
private fun CheckPermission() : Boolean {
if( (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED)
|| (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED) ){
return true
}
return false
}
private fun RequestPermission() {
ActivityCompat.requestPermissions(
this,
arrayOf(
Manifest.permission.ACCESS_FINE_LOCATION,
Manifest.permission.ACCESS_COARSE_LOCATION
), PERMISSION_ID
)
}
private fun isLocationEnabled() : Boolean{
var locationManager = getSystemService(Context.LOCATION_SERVICE) as LocationManager
return locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER) || locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)
}
override fun onRequestPermissionsResult(
requestCode: Int,
permissions: Array<out String>,
grantResults: IntArray
) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults)
if (requestCode == PERMISSION_ID){
if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED){
Log.d(TAG, "Permission granted")
}
}
}
@SuppressLint("MissingPermission")
private fun getNewLocation(){
locationRequest = LocationRequest()
locationRequest.priority = LocationRequest.PRIORITY_HIGH_ACCURACY
locationRequest.interval = 0
locationRequest.fastestInterval = 0
locationRequest.numUpdates = 2
fusedLocationProviderClient!!.requestLocationUpdates(
locationRequest, locationCallback, null
)
}
private val locationCallback = object : LocationCallback() {
override fun onLocationResult(p0: LocationResult?){
var lastLocation = p0?.lastLocation
if (lastLocation != null) {
locationResult = lastLocation
}
}
}
}
解决方案
我找到了答案。获取位置存在一个已知错误。有关此 StackOverflow 帖子的更多信息。
一个需要放
uses-library android:name="org.apache.http.legacy" android:required="false"/>
在Application选项卡下的 Android 清单中
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