Androidアプリで，GPSのパーミッション承認のリクエストを送りたい！

Androidアプリ開発についての質問です！
現在，GPSを使って位置データを取得して，GoogleMapに表示させるAndroidアプリを作りたい！と思っています．

GPSのパーミッションを承認するリクエストを送る処理をする際にエラーが出てしまうのですが（おそらく），方針としては以下のようなコードであっていますでしょうか？
よろしければご教授していただきたいです！

MapsActivity
1package com.example.googlemap_gps_location_android
2
3import android.Manifest
4import android.content.pm.PackageManager
5import android.location.Location
6import android.location.LocationListener
7import android.os.Bundle
8import androidx.appcompat.app.AppCompatActivity
9import androidx.core.app.ActivityCompat
10import androidx.core.content.ContextCompat
11import com.google.android.gms.maps.GoogleMap
12import com.google.android.gms.maps.OnMapReadyCallback
13import com.google.android.gms.maps.SupportMapFragment
14
15const val MY_PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION = 0
16
17class MapsActivity : AppCompatActivity(), OnMapReadyCallback, LocationListener{
18
19    private lateinit var mMap: GoogleMap
20
21    override fun onCreate(savedInstanceState: Bundle?) {
22        super.onCreate(savedInstanceState)
23        setContentView(R.layout.activity_maps)
24        // Obtain the SupportMapFragment and get notified when the map is ready to be used.
25
26        val mapFragment = supportFragmentManager.findFragmentById(R.id.map) as SupportMapFragment
27        mapFragment.getMapAsync(this)
28
29        if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
30            != PackageManager.PERMISSION_GRANTED) {
31            // Permission is not granted
32            checkPermission()
33        }
34    }
35
36    override fun onMapReady(googleMap: GoogleMap) {
37        mMap = googleMap
38
39        mMap.isMyLocationEnabled = true
40    }
41
42    override fun onRequestPermissionsResult(
43        requestCode: Int,
44        permissions: Array<String>,
45        grantResults: IntArray
46    ) {
47        if (requestCode == MY_PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION) {
48            // If request is cancelled, the result arrays are empty.
49            if ((grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED)) {
50                // permission was granted, yay! Do the
51                // contacts-related task you need to do.
52
53            } else {
54                // permission denied, boo! Disable the
55                // functionality that depends on this permission.
56            }
57        }
58
59        // Add other 'when' lines to check for other
60        // permissions this app might request.
61    }
62
63    override fun onLocationChanged(location: Location) {
64    }
65
66    override fun onProviderEnabled(provider: String) {
67    }
68
69    override fun onProviderDisabled(provider: String) {
70    }
71
72    override fun onStatusChanged(provider: String, status: Int, extras: Bundle) {
73    }
74
75    private fun checkPermission() {
76        // Here, thisActivity is the current activity
77        if (ContextCompat.checkSelfPermission(this,
78                Manifest.permission.ACCESS_FINE_LOCATION)
79            != PackageManager.PERMISSION_GRANTED) {
80
81            // Permission is not granted
82            // Should we show an explanation?
83            if (ActivityCompat.shouldShowRequestPermissionRationale(this,
84                    Manifest.permission.ACCESS_FINE_LOCATION)) {
85                // Show an explanation to the user *asynchronously* -- don't block
86                // this thread waiting for the user's response! After the user
87                // sees the explanation, try again to request the permission.
88
89            } else {
90                // No explanation needed, we can request the permission.
91                ActivityCompat.requestPermissions(this,
92                    arrayOf(Manifest.permission.ACCESS_FINE_LOCATION),
93                    MY_PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION)
94
95                // MY_PERMISSIONS_REQUEST_READ_CONTACTS is an
96                // app-defined int constant. The callback method gets the
97                // result of the request.
98            }
99        } else {
100
101        }
102    }
103}
104

AndroidManifest
1<?xml version="1.0" encoding="utf-8"?>
2<manifest xmlns:android="http://schemas.android.com/apk/res/android"
3    package="com.example.googlemap_gps_location_android">
4    <!--
5         The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
6         Google Maps Android API v2, but you must specify either coarse or fine
7         location permissions for the 'MyLocation' functionality.
8    -->
9    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
10
11    <uses-permission-sdk-23 android:name="android.permission.ACCESS_FINE_LOCATION" />
12
13    <application
14        android:allowBackup="true"
15        android:icon="@mipmap/ic_launcher"
16        android:label="@string/app_name"
17        android:roundIcon="@mipmap/ic_launcher_round"
18        android:supportsRtl="true"
19        android:theme="@style/AppTheme">
20        <activity
21            android:name=".MainActivity"
22            android:label="@string/title_activity_main"
23            android:theme="@style/AppTheme.NoActionBar">
24
25        </activity>
26        <!--
27             The API key for Google Maps-based APIs is defined as a string resource.
28             (See the file "res/values/google_maps_api.xml").
29             Note that the API key is linked to the encryption key used to sign the APK.
30             You need a different API key for each encryption key, including the release key that is used to
31             sign the APK for publishing.
32             You can define the keys for the debug and release targets in src/debug/ and src/release/.
33        -->
34        <meta-data
35            android:name="com.google.android.geo.API_KEY"
36            android:value="@string/google_maps_key" />
37
38        <activity
39            android:name=".MapsActivity"
40            android:label="GoogleMap-GPS-Location">
41            <intent-filter>
42                <action android:name="android.intent.action.MAIN" />
43
44                <category android:name="android.intent.category.LAUNCHER" />
45            </intent-filter>
46        </activity>
47    </application>
48
49</manifest>

error
12019-12-25 11:17:44.033 23317-23317/com.example.googlemap_gps_location_android E/AndroidRuntime: FATAL EXCEPTION: main
2    Process: com.example.googlemap_gps_location_android, PID: 23317
3    java.lang.SecurityException: my location requires permission ACCESS_FINE_LOCATION or ACCESS_COARSE_LOCATION
4        at com.google.maps.api.android.lib6.impl.bm.c(:com.google.android.gms.dynamite_mapsdynamite@19831084@19.8.31 (120700-0):771)
5        at com.google.android.gms.maps.internal.j.a(:com.google.android.gms.dynamite_mapsdynamite@19831084@19.8.31 (120700-0):273)
6        at ck.onTransact(:com.google.android.gms.dynamite_mapsdynamite@19831084@19.8.31 (120700-0):5)
7        at android.os.Binder.transact(Binder.java:914)
8        at com.google.android.gms.internal.maps.zza.zzb(Unknown Source:20)
9        at com.google.android.gms.maps.internal.zzg.setMyLocationEnabled(Unknown Source:109)
10        at com.google.android.gms.maps.GoogleMap.setMyLocationEnabled(Unknown Source:112)
11        at com.example.googlemap_gps_location_android.MapsActivity.onMapReady(MapsActivity.kt:39)
12        at com.google.android.gms.maps.zzak.zza(Unknown Source:2)
13        at com.google.android.gms.maps.internal.zzaq.dispatchTransaction(Unknown Source:12)
14        at com.google.android.gms.internal.maps.zzb.onTransact(Unknown Source:12)
15        at android.os.Binder.transact(Binder.java:914)
16        at cj.b(:com.google.android.gms.dynamite_mapsdynamite@19831084@19.8.31 (120700-0):14)
17        at com.google.android.gms.maps.internal.bb.a(:com.google.android.gms.dynamite_mapsdynamite@19831084@19.8.31 (120700-0):4)
18        at com.google.maps.api.android.lib6.impl.bi.run(:com.google.android.gms.dynamite_mapsdynamite@19831084@19.8.31 (120700-0):2)
19        at android.os.Handler.handleCallback(Handler.java:883)
20        at android.os.Handler.dispatchMessage(Handler.java:100)
21        at android.os.Looper.loop(Looper.java:214)
22        at android.app.ActivityThread.main(ActivityThread.java:7356)
23        at java.lang.reflect.Method.invoke(Native Method)
24        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
25        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)