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获取位置android Kotlin

androidIT知识获取位置

沉舟侧畔千帆进，病树前头万木春。这篇文章主要讲述获取位置android Kotlin相关的知识，希望能为你提供帮助。
我最近添加了获取位置功能。当我尝试显示经度和纬度时，它返回零。
这是我的LocationListener类：

inner class MylocationListener: LocationListener { constructor():super(){ mylocation= Location("me") mylocation!!.longitude mylocation!!.latitude }override fun onLocationChanged(location: Location?) { mylocation=location }override fun onStatusChanged(p0: String?, p1: Int, p2: Bundle?) {}override fun onProviderEnabled(p0: String?) {}override fun onProviderDisabled(p0: String?) {} }

这是我的GetUserLocation函数：
fun GetUserLocation(){ var mylocation= MylocationListener() var locationManager=getSystemService(Context.LOCATION_SERVICE) as LocationManager locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,0,0.1f,mylocation) }

这是我的功能，以返回我的经度和纬度：
fun getLoction (view: View){ prgDialog!!.show(); GetUserLocation()button.setTextColor(getResources().getColor(R.color.green)); textView.text = mylocation!!.latitude.toFloat().toString() Toast.makeText(this, mylocation!!.latitude.toFloat().toString(), Toast.LENGTH_LONG).show() Toast.makeText(this, mylocation!!.longitude.toFloat().toString(), Toast.LENGTH_LONG).show()prgDialog!!.hide() }

答案当GetUserLocation回归时，locationManager超出范围并且可能被破坏，阻止onLocationChanged被调用并提供更新。
此外，你已经在mylocation中定义了GetUserLocation，所以它也超出了范围并进一步杀死了任何机会或者你得到了更新。
你还没有展示外部mylocation在哪里以及如何被宣告（在GetUserLocation之外），但是如果它被宣布，它被GetUserLocation内部的阴影所掩盖。所以你没有得到太多。
【获取位置android Kotlin】这是一个如何做到这一点的例子。 （变量thetext在布局xml中定义，并使用Kotlin扩展访问。）
// in the android manifest < uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/> < uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/> // allow these through Appliation Manager if necessary// inside a basic activity private var locationManager : LocationManager? = nulloverride fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) setSupportActionBar(toolbar)// Create persistent LocationManager reference locationManager = getSystemService(LOCATION_SERVICE) as LocationManager?; fab.setOnClickListener { view -> try { // Request location updates locationManager?.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0L, 0f, locationListener); } catch(ex: SecurityException) { Log.d("myTag", "Security Exception, no location available"); } } }//define the listener private val locationListener: LocationListener = object : LocationListener { override fun onLocationChanged(location: Location) { thetext.setText("" + location.longitude + ":" + location.latitude); } override fun onStatusChanged(provider: String, status: Int, extras: Bundle) {} override fun onProviderEnabled(provider: String) {} override fun onProviderDisabled(provider: String) {} }

另一答案我知道现在已经很晚了，但现在Google已经让它变得更简单了。在开发人员网站中，它表示您需要创建客户端：
private lateinit var fusedLocationClient: FusedLocationProviderClient

然后onCreate获取提供者：
override fun onCreate(savedInstanceState: Bundle?) { // ... fusedLocationClient = LocationServices.getFusedLocationProviderClient(this) }

最后，要获取您的最后一个位置，请致电：
//Don't forget to ask for permissions for ACCESS_COARSE_LOCATION //and ACCESS_FINE_LOCATION @SuppressLint("MissingPermission") private fun obtieneLocalizacion(){ fusedLocationClient.lastLocation .addOnSuccessListener { location: Location? -> latitude =location?.latitude longitude = location?.longitude } }

*使用此实现测试位置（在您的应用程序gradle文件中设置）
implementation 'com.google.android.gms:play-services-location:15.0.1'

有关详细信息，请查看此链接：
Obtain last location
另一答案我想帮助那些试图从头开始获取位置的人。以下是参考：Kotlin Get Current Location
代码将首先检查设备中的位置是打开还是关闭，然后将获取纬度和经度，并将不断更新它。
在build.gradle（Module：app）文件中放这个
compile 'com.google.android.gms:play-services:11.8.0'

activity_main.xml代码
< ?xml version="1.0" encoding="utf-8"?> < RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_marginTop="10dp" android:layout_marginLeft="10dp" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> < TextView android:id="@+id/latitude" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:text="Latitude:" android:textSize="18sp" /> < TextView android:id="@+id/latitude_textview" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/latitude" android:layout_marginLeft="10dp" android:layout_toRightOf="@+id/latitude" android:textSize="16sp" /> < TextView android:id="@+id/longitude" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:text="Longitude:" android:layout_marginTop="24dp" android:textSize="18sp" /> < TextView android:id="@+id/longitude_textview" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/longitude" android:layout_marginLeft="10dp" android:layout_toRightOf="@+id/longitude" android:textSize="16sp"/> < /RelativeLayout>

我激活了。
import android.Manifest import android.annotation.SuppressLint import android.content.Context import android.content.Intent import android.content.pm.PackageManager import android.location.Location import android.location.LocationManager import android.provider.Settings import android.support.v4.app.ActivityCompat import android.support.v7.app.AlertDialog import android.support.v7.app.AppCompatActivity import android.os.Bundle import android.util.Log import android.widget.TextView import android.widget.Toast import com.google.android.gms.common.ConnectionResult import com.google.android.gms.common.api.GoogleApiClient import com.google.android.gms.location.LocationRequest import com.google.android.gms.location.LocationServices import com.google.android.gms.maps.model.LatLngclass MainActivity : AppCompatActivity(), GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, com.google.android.gms.location.LocationListener {private var mLatitudeTextView: TextView? = null private var mLongitudeTextView: TextView? = null private var mGoogleApiClient: GoogleApiClient? = null private var mLocation: Location? = null private var mLocationManager: LocationManager? = nullprivate var mLocationRequest: LocationRequest? = null private val listener: com.google.android.gms.location.LocationListener? = null private val UPDATE_INTERVAL = (2 * 1000).toLong()/* 10 secs */ private val FASTEST_INTERVAL: Long = 2000 /* 2 sec */private var locationManager: LocationManager? = nullprivate val isLocationEnabled: Boolean get() { locationManager = getSystemService(Context.LOCATION_SERVICE) as LocationManager return locationManager!!.isProviderEnabled(LocationManager.GPS_PROVIDER) || locationManager!!.isProviderEnabled(LocationManager.NETWORK_PROVIDER) }override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main)mLatitudeTextView = findViewById(R.id.latitude_textview) as TextView mLongitudeTextView = findViewById(R.id.longitude_textview) as TextViewmGoogleApiClient = GoogleApiClient.Builder(this) .addConnectionCallbacks(this) .addOnConnectionFailedListener(this) .addApi(LocationServices.API) .build()mLocationManager = this.getSystemService(Context.LOCATION_SERVICE) as LocationManagerLog.d("gggg","uooo"); checkLocation() //check whether location service is enable or not in yourphone }@SuppressLint("MissingPermission") override fun onConnected(p0: Bundle?) { if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSI

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