Does someone knows why i gat this error? I have the import 'package:geolocator/geolocator.dart' and 'package:location/location.dart' and also google maps import. I've installed every package.
This means that LocationAccuracy is defined in more than one library, in your case, LocationAccuracy is both in package:geolocator/geolocator.dart and package:location/location.dart. So you need a prefix to specify from which library you are using the LocationAccuracy as Flutter doesn't know from which library should it use. You can add prefix in import like below:
import 'package:geolocator/geolocator.dart' as geolocator; // you can change this to what you want
import 'package:location/location.dart' as locator; // you can change this to what you want
You can then specify the LocationAccuracy you would like to use from the packages with the help of prefix whether it be:
geolocator.LocationAccuracy or locator.LocationAccuracy
Related
I have a set of Swift Packages that I'm writing (ex: CUIExpandableButton), that I'd like to roll up into another Swift Package called CrystalUI. The overall goal is to write a set of packages that get bundled into a single package. However, I want to make it so people can just have one import
import CrystalUI
instead of a series of import statements
import CrystalUI
import CUIExpandableButton
import PreviewKit
...
Is it possible to re-expose an existing library as part of the parent library?
Looks like #_exported Is what I was looking for. Found this article that explains it. It's an unsupported method but it's also used in Alamofire so I think it's safe.
I'd like to import Control.App into a module that refers to PrimIO.PrimIO via the unqualified name PrimIO in a lot of places. The problem, of course, is that Control.App also exports a definition named PrimIO. I would like to minimize the damage by importing either only App or everything but PrimIO from Control.App; i.e. what one would do with import Control.App (App) or import Control.App hiding (PrimIO) in Haskell.
What is the Idris2 way of doing this?
Based on #michaelmesser's comment, I was able to get this working with the following:
import Control.App
%hide Control.App.PrimIO
However, this doesn't give me a good way of explicitly referring to Control.App.PrimIO when I do need to refer to it.
I'm having trouble using the Backendless plugin for Flutter.
I include
import 'package:backendless_sdk/backendless_sdk.dart';
(as per the instructions) and can then use e.g. Backendless.UserService. But if I try to generate a user to register, e.g.:
var user = new BackendlessUser();
user.setEmail("info#example.org");
user.setPassword("password");
Backendless.UserService.register(user);
I get an error Undefined class 'BackendlessUser' on the first line. This class is defined in src/modules/user_service.dat, which is exported by src/modules/modules.dartlike this:
library modules;
export 'cache.dart';
...
export 'user_service.dart';
which in turn is imported by backendless_sdk.dart like this:
import 'package:backendless_sdk/src/modules/modules.dart';
I would have thought that it would get imported indirectly by the import of backendless_sdk.dart, but apparently not. When I import it explicitly (with the same import statement, but now in my own code and not just indirectly in backendless_sdk.dart), I get a warning Don't import implementation files from another package. But it's not an implementation file; it's exported as part of the public API (at least that's what I understand the export statement to mean).
The Dart tutorial for creating packages suggests to place the export statements directly under lib, not in lib/src, so I'm wondering whether this is an error in the structure of the plugin, or whether I'm doing something wrong.
I'd be grateful both for a solution to this particular problem and also for pointers to how I can better understand packages, libraries, imports and exports in dart; unfortunately I don't find the language specification particularly helpful in this regard.
(The error and the warning are the same whether I use flutter analyze or IntelliJ IDEA.)
The problem has been fixed in the 0.0.3 version of the plugin. Please update the backendless_sdk version in your pubspec.yaml.
You can include the only one import now:
import 'package:backendless_sdk/backendless_sdk.dart';
Please also note, that there are some changes in the syntax. So for your example you should use:
var user = new BackendlessUser()
..email = "info#example.org"
..password = "password";
Backendless.userService.register(user);
Thanks for using Flutter SDK and pointing out this issue.
It's indeed the problem in the structure of the plugin. The Backendless team is aware of it and this problem will be fixed in the next release of the plugin.
For now you can import explicitly and suppress the warning.
Probably a basic mistake, but the cause is eluding me. I am trying to import a package, but I get an error saying it cannot be found or imported.
First I set the current directory to the parent directory of the package, and this does not work.
Second, the docs say that the parent folder of the package must be added to the matlab path. I tried this, and still no luck.
It is not due to using plot as the package name as I get the same error when trying to import analysis.
What I can do is to import using: import plot.* or import analyse.* and then go on to use the functions in the packages, but I want to use the namespaces (i.e. not use .*).
Edit
I'm having this problem on both versions I have installed: 2015b and 2016a.
The answer is that, somewhat counterintuitively, you don't need to call import at all. The docs state that
The parent of the top-level package folder must be on the MATLAB path.
Which is what your addpath(pwd) does and then state that (emphasis is mine):
All references to packages, functions, and classes in the package must
use the package name prefix, unless you import the package.
Meaning at this stage you should be able to call
analyse.testFunc
If you were to import analyse.testFunc you would then be able to call testFunc without prefacing it with the namespace but since you want to retain the namespace the answer is to not call import at all.
I have a class uses the following lines, it works fine in a Google App Engine project:
import javax.jdo.annotations.IdGeneratorStrategy;
import javax.jdo.annotations.IdentityType;
import javax.jdo.annotations.PersistenceCapable;
import javax.jdo.annotations.Persistent;
import javax.jdo.annotations.PrimaryKey;
But when I included this class in another project, it cause error :
package javax.jdo.annotations does not exist
What should I do to find javax.jdo.* ?
Add the JDO jar file to the class path.
The star notation for imports isn't working the way you think it does.
It's not recursive - it only applies the child classes in javax.jdo, not the child packages.
If you want all the classes in javax.jdo.annotations, you'll need to import javax.jdo.annotations.*, too.
I'd recommend not using the star notation. Better to type out the imports for every class individually. Use an IDE to help you. It's clearer for you and other programmers who come after you where those classes came from.