今天试着写了一个android获取定位的Demo贴上来以便以后查看，其中涉及到定位权限的判断以及获取

package com.lmm.locationdemo

import android.Manifest
import android.content.Context
import android.content.pm.PackageManager
import android.location.Criteria
import android.location.Location
import android.location.LocationListener
import android.location.LocationManager
import android.os.Build
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.support.v4.app.ActivityCompat
import android.widget.TextView

class MainActivity : AppCompatActivity() {

    private var mLocationManager: LocationManager? = null
    private var mProvider: String? = null
    private val _requestPermissionCode = 1000
    private var mGPSText: TextView? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        initView()
        location()
    }

    private fun initView() {
        mGPSText = findViewById(R.id.gps)
    }

    private fun getLocationManager() {
        if (mLocationManager != null) {
            return
        }
        mLocationManager = getSystemService(Context.LOCATION_SERVICE) as LocationManager
    }


    private fun getProvider():String? {
        val criteria = Criteria()
        criteria.accuracy = Criteria.ACCURACY_FINE
        criteria.isSpeedRequired = false
        criteria.isAltitudeRequired = false
        criteria.isBearingRequired = false
        criteria.isCostAllowed = false
        criteria.powerRequirement = Criteria.POWER_LOW
        getLocationManager()
        return mLocationManager?.getBestProvider(criteria, true)
    }

    private fun location() {

        if (!checkPermission()) {

            return
        }

        mProvider = getProvider()

        if (mProvider != null) {
            val location = mLocationManager?.getLastKnownLocation(mProvider!!)
            if (location != null) {
                val gpsStr = "纬度为：" + location!!.latitude + ",经度为：" + location!!.longitude
                mGPSText?.text = gpsStr
            }
            mLocationManager?.requestLocationUpdates(mProvider!!, 2000, 2f, locationListener)
        }
    }

    private val locationListener: LocationListener = object : LocationListener {
        override fun onLocationChanged(location: Location) {
            val gpsStr = "纬度为：" + location.latitude + ",经度为：" + location.longitude
            mGPSText?.text = gpsStr
        }

        override fun onStatusChanged(provider: String, status: Int, extras: Bundle) {}
        override fun onProviderEnabled(provider: String) {}
        override fun onProviderDisabled(provider: String) {}
    }

    private fun checkPermission(): Boolean {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            if (ActivityCompat.checkSelfPermission(
                    this,
                    Manifest.permission.ACCESS_FINE_LOCATION
                ) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(
                    this,
                    Manifest.permission.ACCESS_COARSE_LOCATION
                ) != PackageManager.PERMISSION_GRANTED
            ) {
                requestPermission()
                return false
            }
        }

        return true
    }

    private fun requestPermission() {
        ActivityCompat.requestPermissions(
            this,
            arrayOf(Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION),
            _requestPermissionCode
        )
    }

    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
        if (requestCode == _requestPermissionCode) {
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED && grantResults[1] == PackageManager.PERMISSION_GRANTED) {
                location()
            } else {
                requestPermission()
            }
        }
    }
}

AndroidManifest.xml文件中需要配置如下权限

    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>