我得到：java.lang.SecurityException："gps"位置提供程序需要ACCESS_FINE_LOCATION权限

Question

我正在处理我的应用程序的映射，所以我在这里收到了一条奇怪的error消息，每次我启动应用程序时都会显示java.lang.SecurityException: "GPS" location provider requires ACCESS_FINE_LOCATION permission.，并由于此错误而崩溃，尽管我已经有了权限检查器。

这是我的代码：

public class FragmentHome extends Fragment implements OnMapReadyCallback {
/*
Set up's
*/
private static final String TAG = "FragmentHome";
/*
Pallete
*/

private MapView mapView;
private GoogleMap gMap;
private static final String MAP_VIEW_BUNDLE_KEY = "SOME_KEY";
@SuppressLint("SetJavaScriptEnabled")
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view_fragmentInflate = inflater.inflate(R.layout.fragment_fragment_home, container, false);
mapView = (MapView) view_fragmentInflate.findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(this);
return view_fragmentInflate;
}
@Override
public void onMapReady(GoogleMap googleMap) {
getUserLocation();
}
private void getUserLocation() {
LocationManager locationManager = (LocationManager) getContext().getSystemService(Context.LOCATION_SERVICE);
LocationListener locationListener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
Log.i(TAG, "onLocationChanged: " + location);
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
};
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (getContext().checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED &&
getContext().checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
//    Activity#requestPermissions
// here to request the missing permissions, and then overriding
//   public void onRequestPermissionsResult(int requestCode, String[] permissions,
//                                          int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for Activity#requestPermissions for more details.
requestPermissions(new String[] {
Manifest.permission.ACCESS_FINE_LOCATION
}, 1);
}
}
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
3000, 0, locationListener);
}
}

我真的不知道这行代码哪里出了问题，让我的应用程序崩溃并给我那个错误。

Answer 1

用下面的代码更新您的代码可以解决您的问题

public class FragmentHome extends Fragment implements OnMapReadyCallback {
/*
Set up's
*/
private static final String TAG = "FragmentHome";
/*
Pallete
*/

private MapView mapView;
private GoogleMap gMap;
private static final String MAP_VIEW_BUNDLE_KEY = "AIzaSyDWL-JNHiCXvQefgFh1BdaAflJTveSrHJo";
@SuppressLint("SetJavaScriptEnabled")
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view_fragmentInflate = inflater.inflate(R.layout.fragment_fragment_home, container, false);
mapView = (MapView) view_fragmentInflate.findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(this);
return view_fragmentInflate;
}
boolean isMapReady;
@Override
public void onMapReady(GoogleMap googleMap) {
isMapReady=true;
getUserLocation();
}
private void getUserLocation() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ActivityCompat.checkSelfPermission(getContext(),Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(getContext(),Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
//    Activity#requestPermissions
// here to request the missing permissions, and then overriding
//   public void onRequestPermissionsResult(int requestCode, String[] permissions,
//                                          int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for Activity#requestPermissions for more details.
requestPermissions(new String[]{
Manifest.permission.ACCESS_FINE_LOCATION
}, 1);
return;
}
}
LocationManager locationManager = (LocationManager) getContext().getSystemService(Context.LOCATION_SERVICE);
LocationListener locationListener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
Log.i(TAG, "onLocationChanged: " + location);
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
};

locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
3000, 0, locationListener);
}
}

现在覆盖onRequestPermissionsResult()并检查结果是否被授予，isMapReady标志是否为true，然后调用getUserLocation()。

Answer 2

因此，基于注释的解决方案，我忘记了放入else语句，即如果授予permission，则执行listener，否则执行request权限。

更新：

public class FragmentHome extends Fragment implements OnMapReadyCallback {
/*
Set up's
*/
private static final String TAG = "FragmentHome";
/*
Pallete
*/

private MapView mapView;
private GoogleMap gMap;
private static final String MAP_VIEW_BUNDLE_KEY = "AIzaSyDWL-JNHiCXvQefgFh1BdaAflJTveSrHJo";
@SuppressLint("SetJavaScriptEnabled")
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view_fragmentInflate = inflater.inflate(R.layout.fragment_fragment_home, container, false);
mapView = (MapView) view_fragmentInflate.findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(this);
return view_fragmentInflate;
}
@Override
public void onMapReady(GoogleMap googleMap) {
checkGPSPermission();
getUserLocation();
}
private void checkGPSPermission() {
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if(getContext().checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
if(shouldShowRequestPermissionRationale(Manifest.permission.ACCESS_FINE_LOCATION)) {
// show why is important
}
requestPermissions(new String[] {
Manifest.permission.ACCESS_FINE_LOCATION
}, 1);
} else {
// granted
}
} else {
// granted
}
}
private void getUserLocation() {
LocationManager locationManager = (LocationManager) getContext().getSystemService(Context.LOCATION_SERVICE);
LocationListener locationListener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
Log.i(TAG, "onLocationChanged: " + location);
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
};
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (getContext().checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED &&
getContext().checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
//    Activity#requestPermissions
// here to request the missing permissions, and then overriding
//   public void onRequestPermissionsResult(int requestCode, String[] permissions,
//                                          int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for Activity#requestPermissions for more details.
requestPermissions(new String[] {
Manifest.permission.ACCESS_FINE_LOCATION
}, 1);
} else {
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
3000, 0, locationListener);
}
} else {
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
3000, 0, locationListener);
}
}
}