java - 如何显示位置权限设置
问题描述
如何显示带有允许和拒绝按钮的位置权限弹出窗口?
我有接收位置的功能,但现在我需要自己去设置并打开位置。
我希望当用户打开片段时,显示位置弹出。
这是我目前拥有的代码:
定位器类:
public class LocationFinder extends Service implements LocationListener {
Context context;
boolean isGPSEnabled = false;
// flag for network status
boolean isNetworkEnabled = false;
// flag for GPS status
boolean canGetLocation = false;
Location location; // location
double latitude; // latitude
double longitude; // longitude
// The minimum distance to change Updates in meters
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters
// The minimum time between updates in milliseconds
private static final long MIN_TIME_BW_UPDATES = 200 * 10 * 1; // 2 seconds
// Declaring a Location Manager
protected LocationManager locationManager;
public LocationFinder(Context context) {
this.context = context;
getLocation();
}
@Override
public void onLocationChanged(Location location) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@SuppressLint("MissingPermission")
public Location getLocation() {
try {
locationManager = (LocationManager) context
.getSystemService(LOCATION_SERVICE);
// getting GPS status
isGPSEnabled = locationManager
.isProviderEnabled(LocationManager.GPS_PROVIDER);
// getting network status
isNetworkEnabled = locationManager
.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGPSEnabled && !isNetworkEnabled) {
// no network provider is enabled
// Log.e("Network-GPS", "Disable");
} else {
this.canGetLocation = true;
// First get location from Network Provider
if (isNetworkEnabled) {
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
// Log.e("Network", "Network");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
} else
// if GPS Enabled get lat/long using GPS Services
if (isGPSEnabled) {
if (location == null) {
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
//Log.e("GPS Enabled", "GPS Enabled");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return location;
}
public double getLatitude() {
if (location != null) {
latitude = location.getLatitude();
}
return latitude;
}
public double getLongitude() {
if (location != null) {
longitude = location.getLongitude();
}
return longitude;
}
public boolean canGetLocation() {
return this.canGetLocation;
}
public void showSettingsAlert() {
AlertDialog.Builder alertDialog = new AlertDialog.Builder(context);
alertDialog.setTitle("GPS settings");
alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");
alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
context.startActivity(intent);
}
});
alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
alertDialog.show();
}
}
显示位置的片段:
public class GarageFragment extends Fragment {
LocationFinder finder;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_garage, container, false);
getLocation();
return view;
}
public void getLocation() {
double longitude = 0.0;
double latitude = 0.0;
finder = new LocationFinder(getContext());
if (finder.canGetLocation()) {
latitude = finder.getLatitude();
longitude = finder.getLongitude();
// Toast.makeText(getActivity(), "lat-lng " + latitude + "--" + longitude, Toast.LENGTH_LONG).show();
} else {
finder.showSettingsAlert();
}
Geocoder gcd = new Geocoder(getContext(), Locale.getDefault());
List<Address> addresses = null;
try {
addresses = gcd.getFromLocation(latitude, longitude, 1);
} catch (IOException e) {
e.printStackTrace();
}
if (addresses.size() > 0) {
Toast.makeText(getActivity(), addresses.get(0).getLocality(), Toast.LENGTH_LONG).show();
} else {
// do your stuff
}
}
}
解决方案
显示位置权限弹出窗口和打开位置是两件不同的事情。您仍然必须转到设置以打开位置(如果它已关闭),而权限只是允许您的应用在打开时使用该位置。
要获得许可,您可以使用此方法RunTimePermissions.verifyStoragePermissions(getActivity());
public class RunTimePermissions {
// Storage Permissions variables
private static final int REQUEST_CODE = 6361;
private static String[] PERMISSIONS = {
Manifest.permission.ACCESS_FINE_LOCATION,
};
//persmission method.
public static void verifyStoragePermissions(Activity activity) {
// Check if we have read or write permission
int locationPermission = ActivityCompat.checkSelfPermission(activity, Manifest.permission.ACCESS_FINE_LOCATION);
if (locationPermission != PackageManager.PERMISSION_GRANTED ) {
// We don't have permission so prompt the user
ActivityCompat.requestPermissions(
activity,
PERMISSIONS,
REQUEST_CODE
);
}
}
}
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