実機に位置情報を表示したい

前提・実現したいこと

実機で位置情報が表示されるようにしたいです。

発生している問題・エラーメッセージ

エミュレータでは位置情報が表示されるのですが、
実機で実行すると位置情報が表示されません。

該当のソースコード

MainActivity
1import androidx.appcompat.app.AppCompatActivity
2import android.os.Bundle
3import android.Manifest
4import android.location.LocationManager
5import android.content.pm.PackageManager
6import android.content.Context
7import android.content.Intent
8import android.location.Location
9import android.location.LocationListener
10import android.widget.TextView
11import android.provider.Settings
12import android.widget.Toast
13import android.util.Log
14import androidx.core.app.ActivityCompat
15import androidx.core.content.ContextCompat
16
17
18class MainActivity : AppCompatActivity(), LocationListener {
19
20    // lateinit: late initialize to avoid checking null
21    private lateinit var locationManager: LocationManager
22
23    override fun onCreate(savedInstanceState: Bundle?) {
24        super.onCreate(savedInstanceState)
25        setContentView(R.layout.activity_main)
26
27        if (ContextCompat.checkSelfPermission(this,
28                        Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
29            ActivityCompat.requestPermissions(this,
30                    arrayOf(Manifest.permission.ACCESS_FINE_LOCATION),
31                    1000)
32        } else {
33            locationStart()
34
35            if (::locationManager.isInitialized) {
36                locationManager.requestLocationUpdates(
37                        LocationManager.GPS_PROVIDER,
38                        1000,
39                        50f,
40                        this)
41            }
42
43        }
44    }
45
46    private fun locationStart() {
47        Log.d("debug", "locationStart()")
48
49        // Instances of LocationManager class must be obtained using Context.getSystemService(Class)
50        locationManager = getSystemService(Context.LOCATION_SERVICE) as LocationManager
51
52        val locationManager = getSystemService(Context.LOCATION_SERVICE) as LocationManager
53
54        if (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
55            Log.d("debug", "location manager Enabled")
56        } else {
57            // to prompt setting up GPS
58            val settingsIntent = Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS)
59            startActivity(settingsIntent)
60            Log.d("debug", "not gpsEnable, startActivity")
61        }
62
63        if (ContextCompat.checkSelfPermission(this,
64                        Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
65            ActivityCompat.requestPermissions(this,
66                    arrayOf(Manifest.permission.ACCESS_FINE_LOCATION), 1000)
67
68            Log.d("debug", "checkSelfPermission false")
69            return
70        }
71
72        locationManager.requestLocationUpdates(
73                LocationManager.GPS_PROVIDER,
74                1000,
75                50f,
76                this)
77
78    }
79
80    override fun onRequestPermissionsResult(
81            requestCode: Int, permissions: Array<String>, grantResults: IntArray) {
82        if (requestCode == 1000) {
83            // 使用が許可された
84            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
85                Log.d("debug", "checkSelfPermission true")
86
87                locationStart()
88
89            } else {
90                // それでも拒否された時の対応
91                val toast = Toast.makeText(this,
92                        "これ以上なにもできません", Toast.LENGTH_SHORT)
93                toast.show()
94            }
95        }
96    }
97
98    override fun onStatusChanged(provider: String, status: Int, extras: Bundle) {
99       
100    }
101
102    override fun onLocationChanged(location: Location) {
103        // Latitude
104        val textView1 = findViewById<TextView>(R.id.text_view1)
105        val str1 = "Latitude:" + location.getLatitude()
106        textView1.text = str1
107
108        // Longitude
109        val textView2 = findViewById<TextView>(R.id.text_view2)
110        val str2 = "Longtude:" + location.getLongitude()
111        textView2.text = str2
112    }
113
114    override fun onProviderEnabled(provider: String) {
115
116    }
117
118    override fun onProviderDisabled(provider: String) {
119
120    }
121
122}

xml
1<?xml version="1.0" encoding="utf-8"?>
2<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3    xmlns:tools="http://schemas.android.com/tools"
4    android:layout_width="match_parent"
5    android:layout_height="match_parent"
6    android:orientation="vertical"
7    android:padding="20dp"
8    tools:context=".MainActivity">
9
10    <TextView
11        android:id="@+id/text_view1"
12        android:textSize="20sp"
13        android:layout_margin="20dp"
14        android:textColor="#44f"
15        android:layout_width="wrap_content"
16        android:layout_height="wrap_content" />
17
18    <TextView
19        android:id="@+id/text_view2"
20        android:textSize="20sp"
21        android:textColor="#f44"
22        android:layout_margin="20dp"
23        android:layout_width="wrap_content"
24        android:layout_height="wrap_content" />
25
26</LinearLayout>

Manifest
1<?xml version="1.0" encoding="utf-8"?>
2<manifest xmlns:android="http://schemas.android.com/apk/res/android"
3    package="jp.co.stv_tech.test_gps">
4    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
5    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
6
7    <application
8        android:allowBackup="true"
9        android:icon="@mipmap/ic_launcher"
10        android:label="@string/app_name"
11        android:roundIcon="@mipmap/ic_launcher_round"
12        android:supportsRtl="true"
13        android:theme="@style/AppTheme">
14        <activity android:name=".MainActivity">
15            <intent-filter>
16                <action android:name="android.intent.action.MAIN" />
17
18                <category android:name="android.intent.category.LAUNCHER" />
19            </intent-filter>
20        </activity>
21    </application>
22
23</manifest>