I want to ask user to enable permission only if he denied the permission or the permission is not allowed
This function is working very well on android
Future _getLocationPermission() async {
if (await Permission.location.request().isGranted) {
permissionGranted = true;
} else if (await Permission.location.request().isPermanentlyDenied) {
throw('location.request().isPermanentlyDenied');
} else if (await Permission.location.request().isDenied) {
throw('location.request().isDenied');
permissionGranted = false;
}
}
but on iOS it throw exception permission isPermanentlyDenied
Unhandled Exception: location.request().isPermanentlyDenied
even if the user allowed location permission while using app
I'm using permission_handler package
iOS is stricter, it does not allow you to request for permission if the user has already permanently denied it. In this case your only option is to inform the user about this, and offer the possibility to open application settings and grant permission there. This will likely restart your application if the user grants.
So check the status without requesting:
final status = await Permission.location.status;
If status is permanently denied, display a Flutter dialog (you can't use the system permission grant dialog in this case):
if (status == PermissionStatus.permanentlyDenied) {
// display a dialog, explain the user that he/she can grant
// permission only in the phone's application settings
}
If the user want's to do it, you can route to the application settings:
openAppSettings(); // this is a method of the permission handler package
This method is a future, but in my experience you don't need to await it.
This is just a function that returns bool if the user enables location
or not simple
Future<bool> canGetLocation(Location location) async {
if (!await location.requestService()) return false;
final status = await location.requestPermission();
final granted = PermissionStatus.granted;
final grantedLimited = PermissionStatus.grantedLimited;
bool result = status == granted || status == granted;
return result;
}
if (await canGetLocation(location)) {
// Do something
} else {
final status = await handler.Permission.location.status;
if (status.isPermanentlyDenied || status.isDenied) {
// ask the user to open the app setting
// from permission handler package you have
openAppSettings();
} else {
// show info dialog or something that the user need to enable location services
}
}
Please check this link. You must have to mention permission in POD file also.
Related
I am using below code to access gallery permissions in .net maui but it always returns Granted even on first time launch of the application and I am not able to see the permission popup saying "This app would like to access photos and media on your device"
public static async Task<PermissionStatus> GetMediaPermissionStatus()
{
PermissionStatus mediaResult = PermissionStatus.Disabled;
var tcs = new TaskCompletionSource<PermissionStatus>();
var status = await Permissions.CheckStatusAsync<Permissions.Photos>();
if (status != PermissionStatus.Granted)
{
status = await Permissions.RequestAsync<Permissions.Photos>();
}
tcs.SetResult(status);
return await tcs.Task;
}
Also when I execute below code getting 2 app permission Popups
1st Popup - "Allow application to take pictures and record video"
2nd Popup - "Allow application to access photos and media on your device?"
public async void TakePhoto()
{
if (MediaPicker.Default.IsCaptureSupported)
{
FileResult photo = await Microsoft.Maui.Media.MediaPicker.Default.CapturePhotoAsync();
if (photo != null)
{
// save the file into local storage
string localFilePath = Path.Combine(FileSystem.CacheDirectory, photo.FileName);
using Stream sourceStream = await photo.OpenReadAsync();
using FileStream localFileStream = File.OpenWrite(localFilePath);
await sourceStream.CopyToAsync(localFileStream);
}
}
}
I don't know if it is a bug or I am doing something wrong.
Any help is appreciated!
You can refer to this doc: Permissions of MAUI. There is a table in it. It uses ✔️ to indicate that the permission is supported and ❌ to indicate the permission isn't supported or isn't required
If a permission is marked as ❌, it will always return Granted when checked or requested.
Granted:
The user granted permission or is automatically granted.
Wish it can help you.
here's a screenshot of the code
the code was running well before my current position was printing on the console then I terminated the program and ran it again then it just stopped working
Firstly, you need to decare your position variable outside the function block to be able to access it within your build Widgets.
class _LoadingScreenState extends State<LoadingScreen> {
late Position position;
// ...
Next, you need to update the position state using setState;
// ...
setState(() {
position = await Geolocator.getCurrentPosition( /* complete the call here*/;
});
print(position);
// ...
For any more help or explanation feel free to comment below. Bye!
The official documentation is cleared and detailed. You can consult this link geolocator, It's shows the steps to be followed during the implementation of get the current location.
Firstly, checking is location service enabled in the device,
Secondly, checking and requesting permission to access the position of the device.
Finally, get location service when service is enabled and
permissions are granted .
The following code, it's copied from official documentation:
import 'package:geolocator/geolocator.dart';
/// Determine the current position of the device.
///
/// When the location services are not enabled or permissions
/// are denied the `Future` will return an error.
Future<Position> _determinePosition() async {
bool serviceEnabled;
LocationPermission permission;
// Test if location services are enabled.
serviceEnabled = await Geolocator.isLocationServiceEnabled();
if (!serviceEnabled) {
// Location services are not enabled don't continue
// accessing the position and request users of the
// App to enable the location services.
return Future.error('Location services are disabled.');
}
permission = await Geolocator.checkPermission();
if (permission == LocationPermission.denied) {
permission = await Geolocator.requestPermission();
if (permission == LocationPermission.denied) {
// Permissions are denied, next time you could try
// requesting permissions again (this is also where
// Android's shouldShowRequestPermissionRationale
// returned true. According to Android guidelines
// your App should show an explanatory UI now.
return Future.error('Location permissions are denied');
}
}
if (permission == LocationPermission.deniedForever) {
// Permissions are denied forever, handle appropriately.
return Future.error(
'Location permissions are permanently denied, we cannot request permissions.');
}
// When we reach here, permissions are granted and we can
// continue accessing the position of the device.
return await Geolocator.getCurrentPosition();
}
I'm using the permission_handler package to request permissions on Android. A user is able to download a file to the downloads folder when he clicks on "Allow" in the Permission.storage popup. (We are calling it Permission.storage when the user installs the app.)
The issue is that if a user clicks on "Don't allow" the first time and "Allow" the second time in other flows in the app, we are still getting a permission denied error and the user is not able to download files like above flow. I've logged and checked the value of the status; it is coming as PermissionStatus.granted only which is expected. Any ideas on how to fix this?
Below is the error log
I/flutter ( 8170): could not download file FileSystemException: Cannot open file, path = '/storage/emulated/0/Download/codes.txt' (OS Error: Permission denied, errno = 13)
/// Permission snippet of first time
final permission =
GetPlatform.isAndroid ? Permission.storage : Permission.photos;
final status = await permission.status;
if (status != PermissionStatus.granted) {
await permission.request().isGranted;
}
/// Snippet when user clicks on download second time
final permission = Permission.storage;
final status = await permission.status;
debugPrint('>>>Status $status'); /// here it is coming as PermissionStatus.granted
if (status != PermissionStatus.granted) {
await permission.request().isGranted;
debugPrint('>>> ${await permission.status}');
}
directory = Directory('/storage/emulated/0/Download');
///perform other stuff to download file
when permission_handler package send request to user with request() function, we made in await so after close dialog you check second time if permission granted or not and if permission granted then perform other stuff to download file else you can again send request for the permission.
/// Snippet when user clicks on download second time
final permission = Permission.storage;
final status = await permission.status;
debugPrint('>>>Status $status'); /// here it is coming as PermissionStatus.granted
if (status != PermissionStatus.granted) {
await permission.request();
if(await permission.status.isGranted){
directory = Directory('/storage/emulated/0/Download');
///perform other stuff to download file
} else {
await permission.request();
}
debugPrint('>>> ${await permission.status}');
}
directory = Directory('/storage/emulated/0/Download');
///perform other stuff to download file
I'm sure this is a silly error on my behalf.
Using Permission_handler to request camera permissions on iOS.
On first attempt the dialog shows requesting permission and successfully approves or denies. However, if I deny the request first and try launching the camera again there is no dialog requesting permissions.
static Future<bool> checkCameraPermissions() async {
PermissionStatus status = await Permission.camera.status;
if (status.isUndetermined || status.isDenied) {
print('cam is denied or undetermined'); //Prints
PermissionStatus newStatus = await Permission.camera.request();
print(await Permission.camera.isDenied); //Prints 'true' immediately
if (newStatus.isDenied)
return false;
print('cam is approved!'); //Nope QQ
}
return true;
}
How do I force Permission_handler to request the user again?
According to Apple, the user response is stored and the dialog doesn't open again. You can read more about it over here
What you can do is show a dialog with steps to enable required permissions and open settings page.
Currently, I have a simple method that requests location permissions in my app using permission_handler. Everything works well the 1st time around when accepting/denying permissions. However, once the 1st dialog gets a response, calling .request() no longer opens the permissions request dialog.
Is there a way to trigger the dialog within the app after the user has already responded?
Here's my method:
Future<bool> requestLocationPermissions() async {
bool permissions = await Permission.locationWhenInUse.request().isGranted;
if (permissions) {
return true;
} else {
return false;
}
}