GPSでマップ上に位置情報を出す方法

また、現在地はgoogleの本社が出てしまっていてインターネットからの位置情報しか取れていません。

JAVA
1コードpackage com.example.myapplication;
2
3import androidx.annotation.NonNull;
4import androidx.core.app.ActivityCompat;
5import androidx.fragment.app.FragmentActivity;
6
7import android.Manifest;
8import android.app.Activity;
9import android.content.Context;
10import android.content.Intent;
11import android.content.pm.PackageManager;
12import android.location.Criteria;
13import android.location.Location;
14import android.location.LocationListener;
15import android.location.LocationManager;
16import android.location.LocationProvider;
17import android.os.Bundle;
18import android.os.IBinder;
19import android.provider.Settings;
20import android.telephony.CarrierConfigManager;
21import android.util.Log;
22import android.view.Menu;
23import android.view.MenuItem;
24import android.widget.CompoundButton;
25import android.widget.TextView;
26import android.widget.Toast;
27
28import com.google.android.gms.maps.CameraUpdate;
29import com.google.android.gms.maps.CameraUpdateFactory;
30import com.google.android.gms.maps.GoogleMap;
31import com.google.android.gms.maps.OnMapReadyCallback;
32import com.google.android.gms.maps.SupportMapFragment;
33import com.google.android.gms.maps.model.LatLng;
34import com.google.android.gms.maps.model.Marker;
35import com.google.android.gms.maps.model.MarkerOptions;
36
37import java.util.Locale;
38
39
40public class MapsActivity extends FragmentActivity
41        implements OnMapReadyCallback, LocationListener,
42        CompoundButton.OnCheckedChangeListener {
43    private GoogleMap mMap;
44    private LatLng location;
45    private LatLng latlong;
46    private static Location location1;
47    LocationManager locationmanager1;
48    private static final int LOCATION_CODE = 100;
49    private static final String[] LOCATION_PERMISSION = {
50            Manifest.permission.ACCESS_COARSE_LOCATION,
51            Manifest.permission.ACCESS_FINE_LOCATION,
52
53
54    };
55    private static final int GRANTED = PackageManager.PERMISSION_GRANTED;
56
57    @Override
58    protected void onCreate(Bundle savedInstanceState) {
59        super.onCreate(savedInstanceState);
60        // ここではまだsetContentView()は呼ばない
61
62        locationmanager1 = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
63
64        if (ActivityCompat.checkSelfPermission(this, LOCATION_PERMISSION[0]) != GRANTED &&
65                ActivityCompat.checkSelfPermission(this, LOCATION_PERMISSION[1]) != GRANTED) {
66            // ↓「アクセスを許可しますか？」
67            ActivityCompat.requestPermissions(this, LOCATION_PERMISSION, LOCATION_CODE);
68        } else {
69            startLocation();
70        }
71    }
72
73
74    @Override
75    public void onMapReady(GoogleMap googleMap) {
76
77        mMap = googleMap;
78        double lat = location1.getLatitude();
79        double lon = location1.getLongitude();
80        latlong = new LatLng(lat, lon);
81        mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latlong, 19));
82
83    }
84
85    // アクセス許可のダイアログで操作を行ったときに呼ばれるメソッド
86    @Override
87    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
88        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
89        if (requestCode == LOCATION_CODE) {
90            if (grantResults[0] == GRANTED) {
91                startLocation();
92            } else {
93                // 拒否されたのならアプリ続行不可能
94                finish();
95            }
96        }
97
98    }
99
100    void startLocation() {
101        if (ActivityCompat.checkSelfPermission(this, LOCATION_PERMISSION[0]) == GRANTED ||
102                ActivityCompat.checkSelfPermission(this, LOCATION_PERMISSION[1]) == GRANTED) {
103
104            // 許可を得られたことを確認できた段階で初めてsetContentView()を呼ぶ
105            // onMapReady()が走るのはこれ以後になる
106            setContentView(R.layout.activity_maps);
107            SupportMapFragment mapFragment =
108                    (SupportMapFragment) getSupportFragmentManager()
109                            .findFragmentById(R.id.map);
110            mapFragment.getMapAsync(this);
111
112            Criteria criteria = new Criteria();
113            criteria.setAccuracy(Criteria.ACCURACY_FINE);
114            String provider = locationmanager1.getBestProvider(criteria, true);
115            locationmanager1.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
116            location1 = locationmanager1.getLastKnownLocation(provider);
117        }
118    }
119
120    @Override
121    protected void onDestroy() {
122        super.onDestroy();
123        locationmanager1.removeUpdates(this);
124    }
125
126    @Override
127    public void onStatusChanged(String provider, int status, Bundle extras) {
128        switch (status) {
129            case LocationProvider.AVAILABLE:
130                Log.d("debug", "LocationProvider.AVAILABLE");
131                break;
132            case LocationProvider.OUT_OF_SERVICE:
133                Log.d("debug", "LocationProvider.OUT_OF_SERVICE");
134                break;
135            case LocationProvider.TEMPORARILY_UNAVAILABLE:
136                Log.d("debug", "LocationProvider.TEMPORARILY_UNAVAILABLE");
137                break;
138        }
139
140
141    }
142
143    @Override
144    public void onLocationChanged(Location location1) {
145        LatLng myLocation = new LatLng(location1.getLatitude(), location1.getLongitude());
146        mMap.addMarker(new MarkerOptions().position(myLocation).title("now Location"));
147        mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(myLocation, 18));
148        try {
149            locationmanager1.removeUpdates(this);
150
151        } catch(SecurityException e) {
152            // エラー処理
153        }
154
155        //LatLng curr = new LatLng(location.getLatitude(), location.getLongitude());
156        //mMap.animateCamera(CameraUpdateFactory.newLatLng(curr));
157    }
158
159    @Override
160    public void onProviderEnabled(String provider) {
161    }
162
163    @Override
164    public void onProviderDisabled(String provider) {
165    }
166
167    @Override
168    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
169
170
171    }
172
173

プログラミングの基礎をあまり知らないため、文構成がおかしいなどはあると思っています。

AndroidManifest
1<?xml version="1.0" encoding="utf-8"?>
2<manifest xmlns:android="http://schemas.android.com/apk/res/android"
3    package="com.example.myapplication">
4
5    <uses-permission android:name="android.permission.ACCESS_GPS" />
6    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
7    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
8
9
10    <application
11        android:allowBackup="true"
12        android:icon="@mipmap/ic_launcher"
13        android:label="@string/app_name"
14        android:roundIcon="@mipmap/ic_launcher_round"
15        android:supportsRtl="true"
16        android:theme="@style/AppTheme">
17
18        <!--
19             The API key for Google Maps-based APIs is defined as a string resource.
20             (See the file "res/values/google_maps_api.xml").
21             Note that the API key is linked to the encryption key used to sign the APK.
22             You need a different API key for each encryption key, including the release key that is used to
23             sign the APK for publishing.
24             You can define the keys for the debug and release targets in src/debug/ and src/release/.
25        -->
26        <meta-data
27            android:name="com.google.android.geo.API_KEY"
28            android:value="@string/google_maps_key" />
29
30
31        <activity
32            android:name=".MainActivity"
33            android:label="@string/app_name"
34            android:theme="@style/AppTheme.NoActionBar"
35            >
36            <intent-filter>
37                <action android:name="android.intent.action.MAIN" />
38
39                <category android:name="android.intent.category.LAUNCHER" />
40            </intent-filter>
41        </activity>
42        <activity
43            android:name=".MapsActivity"
44            android:label="@string/title_activity_maps"
45            android:theme="@style/Widget.AppCompat.ActionBar">
46
47        </activity>
48    </application>
49
50</manifest>