回答編集履歴
3
idが違った
test
CHANGED
@@ -182,7 +182,7 @@
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(SupportMapFragment) getSupportFragmentManager()
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.findFragmentById(R.id.map);
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.findFragmentById(R.id.map_goo_fra);
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mapFragment.getMapAsync(this);
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2
追記
test
CHANGED
@@ -35,3 +35,253 @@
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なお、許可しない選択をしたときもやはり同様に落ちると思われますので、その処理は別途必要になるでしょう。
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---
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(15:13追記)
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許可を得られる前にonMapReady()が走ってしまったりとか、いろいろ前後関係がありそうですね。処理を組み直さないと解決できなさそうなので、ざっと書いてみましたが、こんな感じで解決できるでしょうか?
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```java
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public class MapsActivity extends FragmentActivity
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implements OnMapReadyCallback, LocationListener,
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CompoundButton.OnCheckedChangeListener {
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private GoogleMap mMap;
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private LatLng latlong;
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private static Location location1;
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LocationManager locationmanager1;
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private static final int LOCATION_CODE = 100;
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private static final String[] LOCATION_PERMISSION = {
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Manifest.permission.ACCESS_FINE_LOCATION,
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Manifest.permission.ACCESS_COARSE_LOCATION
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};
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private static final int GRANTED = PackageManager.PERMISSION_GRANTED;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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// ここではまだsetContentView()は呼ばない
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locationmanager1 = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
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if (ActivityCompat.checkSelfPermission(this, LOCATION_PERMISSION[0]) != GRANTED &&
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ActivityCompat.checkSelfPermission(this, LOCATION_PERMISSION[1]) != GRANTED) {
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// ↓「アクセスを許可しますか?」
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requestPermissions(LOCATION_PERMISSION, LOCATION_CODE);
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} else {
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startLocation();
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}
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}
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@Override
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public void onMapReady(GoogleMap googleMap) {
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mMap = googleMap;
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double lat = location1.getLatitude();
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double lon = location1.getLongitude();
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latlong = new LatLng(lat, lon);
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mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latlong, 19));
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locationmanager1.removeUpdates(this);
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}
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// 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
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@Override
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public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
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super.onRequestPermissionsResult(requestCode, permissions, grantResults);
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if (requestCode == LOCATION_CODE) {
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if (grantResults[0] == GRANTED) {
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startLocation();
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} else {
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// 拒否されたのならアプリ続行不可能
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finish();
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}
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}
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}
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void startLocation() {
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if (ActivityCompat.checkSelfPermission(this, LOCATION_PERMISSION[0]) == GRANTED ||
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ActivityCompat.checkSelfPermission(this, LOCATION_PERMISSION[1]) == GRANTED) {
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// 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
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// onMapReady()が走るのはこれ以後になる
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setContentView(R.layout.activity_maps);
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SupportMapFragment mapFragment =
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(SupportMapFragment) getSupportFragmentManager()
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.findFragmentById(R.id.map);
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mapFragment.getMapAsync(this);
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Criteria criteria = new Criteria();
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criteria.setAccuracy(Criteria.ACCURACY_FINE);
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String provider = locationmanager1.getBestProvider(criteria, true);
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locationmanager1.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
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location1 = locationmanager1.getLastKnownLocation(provider);
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}
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}
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@Override
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protected void onDestroy() {
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super.onDestroy();
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locationmanager1.removeUpdates(this);
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}
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@Override
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public void onStatusChanged(String provider, int status, Bundle extras) {
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switch (status) {
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case LocationProvider.AVAILABLE:
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Log.d("debug", "LocationProvider.AVAILABLE");
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break;
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case LocationProvider.OUT_OF_SERVICE:
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Log.d("debug", "LocationProvider.OUT_OF_SERVICE");
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break;
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case LocationProvider.TEMPORARILY_UNAVAILABLE:
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Log.d("debug", "LocationProvider.TEMPORARILY_UNAVAILABLE");
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break;
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}
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}
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@Override
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public void onLocationChanged(Location location) {
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//LatLng curr = new LatLng(location.getLatitude(), location.getLongitude());
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//mMap.animateCamera(CameraUpdateFactory.newLatLng(curr));
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}
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@Override
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public void onProviderEnabled(String s) {
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}
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@Override
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public void onProviderDisabled(String s) {
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}
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@Override
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public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
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}
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}
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287
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```
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1
修正
test
CHANGED
@@ -30,7 +30,7 @@
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30
30
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31
31
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32
32
|
|
33
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-
この構造だと、初回の起動でrequestPermissions()側に進むと、許可を得たら即座にreturnによって抜けてしまい、location1が
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この構造だと、初回の起動でrequestPermissions()側に進むと、許可を得たら即座にreturnによって抜けてしまい、location1が設定されることなく進行してしまうので、NullPointerExceptionになるのは必然と思われます。returnを除去することで解決できませんか?
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