I'm trying to build an application for Android using this library: https://github.com/koush/AndroidAsync and I was trying to receive a callback value from the server like this but the app crashes:
client.emit("callbackTry", new Acknowledge() {
#Override
public void acknowledge(JSONArray arg0) {
Log.e(TAG,"acknowledge: "+ arg0);
}
});
I leave you the server-side:
socket.on('callbackTry', function (callback) {
console.log(callback);
var hello = "Hello";
callback(hello);
});
How can I return the data back to the client?
I found a solution myself which consists on changing emit method to emitEvent. Hope it really help someone else too.
Related
I'm facing a issue in an app I'm developing that someone may be able to help me with.
I'm working on an app for payment machines that use Android (7.1), with it you are able to pay with credit card. The company that developed these machines offer a java sdk. Since this app is using React Native, I wrote a Native Module to connect with it. The SDK is really simple.
After the app is authenticated (done just once), All I have to do is call the doAsyncPayment method with the right parameters, and once its done, it will call the onSuccess or onError method of the listener.
When either of these methods is called, I call the callback parameter I got from the React Native side. In theory it's supposed to work, and it does, most of the time. Every once in a while, something happens that these callbacks are not called, so the client stays on the loading payment screen forever. No error is reported on sentry.
The only thing I'm thinking is that somehow the bridge is losing it? Maybe because these method runs asyncronously in the native side (another thread?), the connection is maybe lost?
I haven't been able to reproduce it, because it happens rarely and at random (I suppose).
I don't know much of Native Android, so any help is appreciated.
Here is a resumed piece of code of what's happening:
Native method being called:
#ReactMethod
public void startPayment(...other params,
Callback onErrorCallback, Callback onSuccessCallback) {
setPlugPag();
PlugPagPaymentData paymentData = new PlugPagPaymentData(paymentType, amountCents,
installmentType, installments, userReference, printReceipt);
PlugPagInitializationResult initResult = plugPag.initializeAndActivatePinpad(new
PlugPagActivationData(activationCode));
if(initResult.getResult() == PlugPag.RET_OK) {
plugPag.doAsyncPayment(paymentData, new PlugPagPaymentListener() {
PlugPagPrintResult printResult;
#Override
public void onSuccess(#NonNull PlugPagTransactionResult plugPagTransactionResult) {
if(printResult != null) {
WritableMap printResultMap = Arguments.createMap();
printResultMap.putInt("result", printResult.getResult());
printResultMap.putString("message", printResult.getMessage());
printResultMap.putString("errorCode", printResult.getErrorCode());
onSuccessCallback.invoke(TransactionResult.toRNWritableMap(plugPagTransactionResult), printResultMap);
}else {
onSuccessCallback.invoke(TransactionResult.toRNWritableMap(plugPagTransactionResult));
}
}
#Override
public void onError(#NonNull PlugPagTransactionResult plugPagTransactionResult) {
onErrorCallback.invoke(TransactionResult.toRNWritableMap(plugPagTransactionResult));
}
#Override
public void onPaymentProgress(#NonNull PlugPagEventData plugPagEventData) {
WritableMap eventDataMap = Arguments.createMap();
eventDataMap.putString("customMessage", plugPagEventData.getCustomMessage());
eventDataMap.putInt("eventCode", plugPagEventData.getEventCode());
sendEvent(Constants.EVENT_PLUG_PAG_PAYMENT_PROGRESS_CHANGED, eventDataMap);
}
#Override
public void onPrinterSuccess(#NonNull PlugPagPrintResult plugPagPrintResult) {
}
#Override
public void onPrinterError(#NonNull PlugPagPrintResult plugPagPrintResult) {
}
});
}else {
onErrorCallback.invoke(String.valueOf(initResult.getResult()));
}
}
on React native side, I just call:
startPayment(...other params, errorCallback, successCallback);
Maybe because the way the listener is instantiated?
Thanks in advance.
I want to send a String message to database when user presses a specific button in the LibGDX game I am designing for android. How do I go about doing that? Following is the code I tried. But it does not work.
Net.HttpRequest httpRequest = new Net.HttpRequest();
httpRequest.setMethod("POST");
httpRequest.setUrl("URL is here");
httpRequest.setContent("INSERT INTO `game_table` (`Button`) VALUES ('Button 1 Pressed')");
Net.HttpResponseListener httpResponseListener = new Net.HttpResponseListener() {
#Override
public void handleHttpResponse(Net.HttpResponse httpResponse) {
Gdx.app.log("Log httpResponse", httpResponse.getResultAsString());
}
#Override
public void failed(Throwable t) {
}
#Override
public void cancelled() {
}
};
Gdx.net.sendHttpRequest(httpRequest,httpResponseListener);
Log does not provide anything in android monitor. I also tried using AsyncTask and without AsyncTask to implement this code. But neither works.
Am I missing something? If so could you give me small code snippet that will work?
You don't need to use an AsyncTask, libGDX' HTTPRequest is async out of the box.
You did not log anything if the request fails or is cancelled so probably that's the case.
I am attempting to create a real-time communication capability for a Phonegap/Cordova app. I am using SignalR 2 to handle the communication.
The thing I am struggling with is getting a message to a particular user. Every single example out there shows saving Context.User.Identity.Name, which is useless to me because the remote site's User.Identity context is not shared by my phonegap app.
In essence, I am not authenticating a user in the traditional sense, so I need another way of linking the SignalR connectionID with the username I pass along.
Taken from the official ASP.NET signalr Examples, I have the following code which overrides the OnConnected event. Unfortunately it takes no parameters and expects User.Identity to be not null:
public override Task OnConnected()
{
using (var db = new UserContext())
{
// Retrieve user.
var user = db.Users
.Include(u => u.Rooms)
.SingleOrDefault(u => u.UserName == Context.User.Identity.Name);
// If user does not exist in database, must add.
if (user == null)
{
user = new User()
{
UserName = Context.User.Identity.Name
};
db.Users.Add(user);
db.SaveChanges();
}
else
{
// Add to each assigned group.
foreach (var item in user.Rooms)
{
Groups.Add(Context.ConnectionId, item.RoomName);
}
}
}
return base.OnConnected();
}
Now, maybe what I'd need is to have a version of this method that takes a string as a parameter and then I'd use that as my user identifier.
But how to go about that?
You need to create a new IUserIdProvider for the user and use dependency injection to register your provider and use it.
public interface IUserIdProvider
{
string GetUserId(IRequest request);
}
Register your provider with Global Host
GlobalHost.DependencyResolver.Register(typeof(IUserIdProvider), () => new MyIdProvider());
Usage:
public class MyHub : Hub
{
public void Send(string userId, string message)
{
Clients.User(userId).send(message);
}
}
Taken from: http://www.asp.net/signalr/overview/guide-to-the-api/mapping-users-to-connections#IUserIdProvider
Where is the documentation/sample for all overloads of invokeApi function for Azure Mobile Service client SDK for Android?
I found this article and tried following code, which does not work. There are no compile time or run time errors, invokeApi gets called, but it does not come back to onSuccess or onFailure. If I call invokeApi without order object, everything works as expected
PizzaOrder order = new PizzaOrder();
order.Size = "Large";
order.Flavor = "Four cheeses";
order.UserPhone = "555-555-1234";
ListenableFuture<PizzaOrderResponse> testresult = mClient.invokeApi("bookservice", order, PizzaOrderResponse.class);
Futures.addCallback(testresult, new FutureCallback<PizzaOrderResponse>() {
#Override
public void onFailure(Throwable exc) {
// failure handling code here
}
#Override
public void onSuccess(PizzaOrderResponse testresult) {
// success handling code here
}
});
One of the properties in the data object being returned by the custom API had incorrect data type. I am still not sure where the good documentation is and why custom API call did not fail but at least it is working now.
I am using this library for connecting to a websocket server from android.
Specifically this part :
AsyncHttpClient.getDefaultInstance().websocket("ws://192.168.2.10:8000/temp" , "my-protocol", new WebSocketConnectCallback() {
#Override
public void onCompleted(Exception ex, WebSocket webSocket) {
if (ex != null) {
ex.printStackTrace();
return;
}
webSocket.send("a string");
webSocket.setStringCallback(new StringCallback() {
#Override
public void onStringAvailable(String s) {
Debug.Log( LOGTAG ,"I got a string: " + s);
}
});
webSocket.close(); // issue here
}
});
I would like to close the socket when I click a button. Now everytime I want to send a message to the socket I open it and close it.
I would like to open it once and keep it alive and close it when I click a close button. My idea was to pass a variable to the WebSocketConnectCallback and make a static variable and based on this variable close the socket.
I would like to know what is the best practice in a situation like this.
Use the Application class (http://developer.android.com/reference/android/app/Application.html):
Inherid your own class for Application and here you can track the socket, open it, close it as you need.
See a tutorial (first google match, maybe there is a better one): http://www.intertech.com/Blog/androids-application-class/
So basically extend Application and add your class in the manifest file as application class.
Your may add a timer that might close the socket after several time while not used.