I have been trying almost all samples in dji github (either android or ios) but couldn't connect my dji product (phantom 4 pro+ V2.0) to my app. I can successfully register my app by using my api key, but when I connect dji product to the phone with usb cable I cannot see any connection. Give me a help please.
For iOS App: You need to add the external UISupportedExternalAccessoryProtocols keys to your plist file. Like this
`
<key>UISupportedExternalAccessoryProtocols</key>
<array>
<string>com.dji.video</string>
<string>com.dji.protocol</string>
<string>com.dji.common</string>
</array>
And then use the DJIAssistantSimulator to simulate to the drone location.
The first step in connecting your drone to your application is by calling DJISDKManager.registerApp and pass an instance of DJISDKManagerDelegate.
class ProductPublisher : NSObject, ObservableObject {
...
func registerWithSDK() {
...
DJISDKManager.registerApp(with: self)
}
...
}
The important part is your delegate implements some required methods and calling DJISDKManager.startConnectionToProduct().
extension ProductPublisher : DJISDKManagerDelegate {
func appRegisteredWithError(_ error: Error?) {
// set breakpoint here
DJISDKManager.startConnectionToProduct()
}
func productConnected(_ product: DJIBaseProduct?) {
// set breakpoint here, this marks a successful connection
}
}
The class ProductPublisher is a class of my own where I encapsulate all logic regarding registration and connection. It is part of a tutorial series for iOS I am writing. What I have just explained is in part 2.
Related
I'm developing an app using Xamarin's HCE feature.
The project structure is as follows.
hceSample
hceSample.Android
hceSample.iOS
I am implementing hce simulation code called hceService in hceSample, not hceSample.Android.
A function called Enable_Card exists in the hce service, and you want to use the NfcFCardEmulation.EnableService function in that function.
Activity and ComponentName are requested as parameters of the function.
The ComponentName area was handled easily, but I don't know how to get the Activity. Please advise.
This is the contents of enable_Card function of hceService.
private Activity activity = null;
private bool enable_Card(cardModel card)
{
try
{
sid = card.cardSN;
tag = "Felica";
emulation.EnableService(, componentName); //<- How to get Activity??
emulation.SetNfcid2ForService(componentName, sid);
return true;
}
catch
{
return false;
}
}
This is my first time asking a question on Stackoverflow.
I would appreciate it if you could point out any missing or incorrect parts.
I trying this
activity = Xamarin.Essentials.Platform.CurrentActivity; //<- this function is not found!
Added missing information!
The namespace of the Enable_Card function is located in hceSample.Service.
Are you using the NfcFCardEmulation.EnableService(Activity, ComponentName) Method, right?
The method is an android api from android sdk,you cannot use it directly in xamarin.form(yours is hceSample) project.
If you want to call the function in xamarin form project(hceSample) from native platform(hceSample.Android, or hceSample.iOS),you can use Xamarin.Forms DependencyService to achieve this.
The DependencyService class is a service locator that enables Xamarin.Forms applications to invoke native platform functionality from shared code.
For more information about DependencyService, you can check document Xamarin.Forms DependencyService. And there is a sample included in above document,which is helpful for you to understand DependencyService.
Note:
We recognize that hardware service is the right and ideal way to
implement in each OS project. However, I'm curious if there is a way
to code Android and iOS at the same time
Since the api you used is from android sdk, you can call it in native android or use DependencyService to call it on xamarin.form(yours is hceSample) project.
If you call it on xamarin.form(yours is hceSample) project, you also need to find the the corresponding function or interface in iOS.
I'm actually working on a Xamarin Forms application that need push notifications. I use the Plugin.PushNotification plugin.
When the app is running in the foreground or is sleeping (OnSleep), I have no problem to open a specific page when I click on a notification that I receive. But I was wondering how can I do that when the app is closed. Thanks!
I finally found the answer by myself and I want to share it in case someone needs it.
Nota bene: according to the official documentation of the plugin, it's Xam.Plugin.PushNotification that is deprecated. I use the new version of this plugin, Plugin.PushNotification which uses FCM for Android and APS for iOS.
There is no significant differences to open a notif when the app is running, is sleeping or is closed. Just add the next callback method in the OnCreate method (MyProject.Droid > MainApplication > OnCreate) and FinishedLaunching method (MyProject.iOS > AppDelegate > FinishedLaunching):
CrossPushNotification.Current.OnNotificationOpened += (s, p) =>
{
// manage your notification here with p.Data
App.NotifManager.ManageNotif(p.Data);
};
Common part
App.xaml.cs
// Static fields
// *************************************
public static NotifManager NotifManager;
// Constructor
// *************************************
public App()
{
...
NotifManager = new NotifManager();
...
}
NotifManager.cs
public class NotifManager
{
// Methods
// *************************************
public void ManageNotif(IDictionary<string, object> data)
{
// 1) switch between the different data[key] you have in your project and parse the data you need
// 2) pass data to the view with a MessagingCenter or an event
}
}
Unfortunately there is no succinct answer for either platform. Generally speaking, you need to tell the OS what to do when it starts the app as a result of the push notification. On both platforms, you should also consider what API level you are targeting, otherwise it won't work or even crash the app.
On iOS, you will need to implement this method in AppDelegate appropriately: FinishedLaunching(UIApplication application, NSDictionary launchOptions). The launchOptions will have the payload from the push notification for you to determine what to do with it (e.g. what page to open). For more information on iOS, Xamarin's documentation is a good place to start.
Android has a more complicated topology in terms of more drastic differences between API levels, whether you are using GCM/FCM, as well as requiring more code components. However, to answer the question directly, you will need to handle this in OnCreate(Bundle savedInstanceState) of your main Activity. If you are using Firebase, the push notification payload is available in Intent.Extras. Again, Xamarin's documentation has a good walkthrough.
Finally, note that the Plugin.PushNotification library you are using has been deprecated. I suggest you either change your library and/or your implementation soon. Part of the reason that library has been deprecated is because Google has deprecated the underlying Google Cloud Messaging (GCM) service, which will be decommissioned on April 11, 2019.
I am developing an Xamarin.forms application, I need to catch the imei number of mobile that is using the application. I am aware of how it is done in Android. But how can I do the same in Xamarin.forms. Please educate me.
There is no 'Forms-way' of doing this. If you know how on Android you can make use of the DependencyService. Which means in your shared project create an interface like:
public interface IImeiService
{
string GetImei();
}
Now in your Android project implement this interface, so it would be something like:
public class ImeiService : IImeiService
{
public string GetImei()
{
// ... Implement your Android code here
}
}
Register your Android code with an attribute on the class above the namespace
[assembly: Xamarin.Forms.Dependency (typeof (ImeiService))]
namespace ImeiApp.Droid {
You can now access it, back in your shared code, with:
var imei = DependencyService.Get<IImeiService>().GetImei();
If you would have an iOS implementation you could repeat the same steps, although you can, of course, use the same interface and call in shared code, so you will only need a iOS specific implementation.
However, since iOS 7 Apple disallows access to this kind of information programmatically, so you cannot get the IMEI number. And if you can, you will use code that will not be allowed through the App Store review process.
I am developing game for windows phone in unity3d, I have inserted Rate me button in game but on run time in windows phone it didn't work, is there any method to access AppID for the current application running in windows phone developed in Unity3d. I need code in unity3d CSharp for getting AppID.
I tried this C# code in Unity but It didn't work and having error no keywork found windows.
string appId = Windows.ApplicationModel.Store.CurrentApp.AppId.ToString();
LinkUri = new Uri("http://www.windowsphone.com/s?appid=" + appId, UriKind.Absolute)
Here I needed AppID to complete my link for rate me.
As far as i know Unity can not access the Windows namespace but you can make use of EventHandler to call 'Review Task' from Unity. You can do this by following below steps(visit Unity Expert for detailed explanation).
In Unity Game Engine-
Create Event -
using UnityEngine;
using System;
public static class events
{
//Create a new event
public static event EventHandler RateUs;
public static void FireRateUs()
{
Debug.Log ("Opening Rate Task......");
//If event is subscribed than fire it
if(RateUs!=null)
RateUs(null,null);
}
}
Fire Event -
using UnityEngine;
public class RateUs : MonoBehaviour
{
void OnMouseDown()
{
events.FireRateUs();
}
}
In Visual Studio IDE
Subscribe Event -
public MainPage()
{
.
.
.
.
events.RateUs += events_RateUs;
}
Call Function -
void events_RateUs(object sender, EventArgs e)
{
String AppId = Windows.ApplicationModel.Store.CurrentApp.AppId.ToString();
Windows.System.Launcher.LaunchUriAsync(new Uri("ms-windows-store:reviewapp?appid=" + AppId));
}
You have to get your AppID from your developer's portal on Microsoft Create's web page. You can then hardcode it into your app or save it as a static/globally available variable for accessing purposes. This would mean you would have to begin the process of creating your app entry prior to the programming of the rating game feature. Just create the entry, and don't submit it! Or create it, and add Rate app as an update. I'd choose the former method, personally!
For Apple and Google rating/submit information you have to create the entry ahead of time to get a SKU number. Also in iTunes/Apple/iOS/OSX you have to create the app and give it a unique name, etc in the developer's portal/certificate store.
I'm trying to authenticate the local player using swift, but every time I get a false value for the .authenticated property. Here is the code I'm using, it is called by the main view controller when the app starts.
func authenticateLocalPlayer(){
var localPlayer = GKLocalPlayer()
localPlayer.authenticateHandler = {(viewController, error) -> Void in
if viewController {
self.presentViewController(viewController, animated: true, completion: nil)
}else{
println((GKLocalPlayer().authenticated))
}
}
}
It brings up the log in view just fine, but when I enter a test account login, it just returns the GKLocalPlayer().authenticatedas false. The bundle identifier in iTunes Connect and the info.plist are exactly the same, as is the version and the app name. Everything is enabled for Game Center on iTunes Connect and in Xcode, but I have a feeling it's not a coding error, it's a setup error in the app record somewhere but I can't for the life of me find where.
After further tinkering, I'm getting this error:
Error Domain=GKErrorDomain Code=15 "The requested operation could not be completed because this application is not recognized by Game Center." UserInfo=0x17006b300 {NSLocalizedDescription=The requested operation could not be completed because this application is not recognized by Game Center.}
I have no idea why this is the case, the bundle ID, name and versions all match...
Any help would be greatly appreciated.
This issue has been resolved by Apple - just call:
GKLocalPlayer.localPlayer()
Previously, the issue was that GKLocalPlayer() does not return the GKLocalPlayer singleton, but instead returns a new GKLocalPlayer instance.
If you were on the Xcode 6 BETA, you could add a C function or Objective-C method that returns the real GKLocalPlayer singleton, then use this in Swift. This is the gist of my workaround (with bad naming conventions):
In an Objective-C header:
GKLocalPlayer *getLocalPlayer(void);
In an Objective-C implementation:
GKLocalPlayer *getLocalPlayer(void) {
return [GKLocalPlayer localPlayer];
}
In your bridging header:
#import "ThatHeader.h"
Then whenever you need to access the GKLocalPlayer singleton in Swift, you can just use getLocalPlayer() instead of GKLocalPlayer(). It's probably a better idea to stick that in an method of a GKLocalPlayer category.
However, this is no longer necessary as detailed above.
Even with Xcode 6 Beta 6, on a device using iOS 8 beta 5, making GKLocalPlayer.localPlayer() available, I was still getting the error:
"NSLocalizedDescription=The requested operation could not be completed
because this application is not recognized by Game Centre"
The solution (discovered through Apple's Dev forum) was to go to "Settings" on the device, and then into "Game Centre" and enable "Sandbox" under the developer section.
You can use that, I create a simple class for iOS game center in GitHub
Easy Class Game Center Swift
https://github.com/DaRkD0G/Easy-Game-Center-Swift