Develop Reference

Kotlin: how get device token from javascript?

From a Javascript function I want to get the device token.
I come from Javascript and PHP and I need to do it this way. I'm newbie to kotlin.
This is my project, where is the problem?
MainActivity.kt ### I'ts Works
class MainActivity : AppCompatActivity() {
private lateinit var webVisor: WebView
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
ejecutarWebView() // Ejecuta mi WebView
FirebaseMessaging.getInstance().token.addOnCompleteListener(OnCompleteListener { task ->
if (!task.isSuccessful) {
Log.w(TAG, "Fetching FCM registration token failed", task.exception)
return#OnCompleteListener
}
// Obtenga un nuevo token de registro de Firebase Cloud Messaging (FCM)
val token = task.result
// MOSTRAR LOG Y TOAST
//val msg = getString(R.string.msg_token_fmt, token)
val msg = "TOKEN>$token"
Log.d(TAG, msg)
Toast.makeText(baseContext, msg, Toast.LENGTH_SHORT).show()
})
}
fun ejecutarWebView (){
webVisor = findViewById(R.id.webView)
webVisor.setWebViewClient(WebViewClient())
//webVisor.webViewClient = WebViewClient()
//webVisor.settings.javaScriptEnabled = true // Javascript habilitado
webVisor.getSettings().setJavaScriptEnabled(true)
//webVisor.getSettings().setAllowFileAccess(true); // Permiso en TRUE para accedera archivos locales
webVisor.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
webVisor.loadUrl("http://server20host-net.com/app.php")
webVisor.addJavascriptInterface(WebAppInterface(this), "Android")
webVisor.setWebViewClient(object : WebViewClient() {
#Deprecated("Deprecated in Java")
public override fun onReceivedError(
view: WebView,
errorCode: Int,
description: String,
failingUrl: String
) {
webVisor.loadUrl("file:///android_asset/error.html")
}
})
}
override fun onKeyDown(keyCode: Int, event: KeyEvent?): Boolean {
if (keyCode == KeyEvent.KEYCODE_BACK && webVisor.canGoBack()) {
webVisor.goBack()
return true
}
return super.onKeyDown(keyCode, event)
}
MyFirebaseMessagingService.kt ### I'ts Works
#SuppressLint("MissingFirebaseInstanceTokenRefresh")
class MyFirebaseMessagingService : FirebaseMessagingService() {
override fun onNewToken(token: String) {
Log.d(ContentValues.TAG, "Kotlin Refreshed token: $token")
// If you want to send messages to this application instance or
// manage this apps subscriptions on the server side, send the
// FCM registration token to your app server.
sendRegistrationToServer(token)
}
private fun sendRegistrationToServer(token: String) {
val urlServer ="http://server20host-net.com/registrarToken.php"
val stringRequest: StringRequest = object : StringRequest(Request.Method.POST, urlServer,
Response.Listener<String> {
fun onResponse(response: String?) {
val men = "REGISTRED SUCCEFULL"
Log.d(ContentValues.TAG, men)
Toast.makeText(baseContext, men, Toast.LENGTH_LONG).show()
}
}, Response.ErrorListener {
fun onErrorResponse(error: VolleyError?) {
Toast.makeText(
getApplicationContext(),
"Error en la Conexión",
Toast.LENGTH_LONG
).show()
}
}) {
#Throws(AuthFailureError::class)
override fun getParams(): Map<String, String> {
val params = HashMap<String, String>()
params.put("Token", token)
return params
}
}
Log.d(ContentValues.TAG, "REGISTRED SUCCEFULL")
val requestQueue: RequestQueue = Volley.newRequestQueue(this)
requestQueue.add(stringRequest)
}
}
WebAppInterface.kt
Here many errors || I have many doubts about how I call the token variable
class WebAppInterface(private val mContext: Context) {
private lateinit var webVisor: WebView
/** Show a toast from the web page */
#JavascriptInterface
fun showToast() {
webVisor.setWebViewClient(WebViewClient())
webVisor.webViewClient = WebViewClient()
lateinit var webVisor: WebView
webVisor.post( Runnable() {
run() {
//NOTE: $token var from MainActivity.kt call
// or WebAppInterface.kt how? I don't know what to do
// Error in all three cases
webVisor.evaluateJavascript("javascript: sendToken($token);",null)
webVisor.loadUrl("javascript: sendToken($token);");
webVisor.loadUrl("javascript:(function sendToken(tokenDevice) { console.log('token from Kotlin>'+$tokenDevice); }")
}
});
}
script.js
the script is jquery functions (or does it have to be vanilla javascript?)
$(document).on("click",".button", function(evt) { // LISTERNER FOR BUTTON
evt.preventDefault();
getToken();
});
function getToken() { // CALL TO KOTLIN FUNCTION FOR GET TOKEN DEVICE
Android.showToast();
}
function sendToken(tokenDevice) { // RECIVED FROM KOTLIN
console.log("token from Kotlin>"+tokenDevice);
}

WebSockets fails to connect because of lost connection

I'm using spring boot in my backend and vuejs in my front-end . I've defined everything in the guide yet I still don't get my project to work.
FrontEnd
connectToWS() {
this.socket = new Sock("http://localhost:8754/stomp-endpoint");
this.stompClient = Stomp.over(this.socket);
this.stompClient.connect(
{},
frame => {
this.connected = true;
console.log(frame);
this.stompClient.subscribe("/topic/greetings", tick => {
console.log(tick);
this.received_messages.push(JSON.parse(tick.body).content);
});
},
error => {
console.log(error);
this.connected = false;
}
);
},
Backend
WebSocketConfiguration Class :
#Configuration
#EnableWebSocketMessageBroker
public class WebsocketConfiguration implements
WebSocketMessageBrokerConfigurer
{
#Override
public void registerStompEndpoints(StompEndpointRegistry registry)
{
// with sockjs
registry.addEndpoint("/stomp-endpoint")
.setAllowedOrigins("http://localhost:8081")
.withSockJS();
}
#Override
public void configureMessageBroker(MessageBrokerRegistry config) {
config.setApplicationDestinationPrefixes("/app")
.enableSimpleBroker("/topic");
}
}
WebSecurityConfigClass :
#Override
protected void configure(HttpSecurity http) throws Exception {
http.cors().and().csrf().disable()
.exceptionHandling().authenticationEntryPoint(unauthorizedHandler).and()
.sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
.authorizeRequests()
.antMatchers("/api/v*/registration/**").permitAll()
.antMatchers("/topic**").permitAll()
.antMatchers("/stomp-endpoint").permitAll()
UPDATE :
The error is actually coming out from the browser . It actually changes the route of the api because it has sockjs integrated into it. I couldn't figure out why the API always gets a /info?t=RandomNumber after it. I need the route to remain the same as I typed it in the front-end.
How can I stop the browser from updating my path. Thanks for helping !

Events not being sent to JavaScript

I am using react-native to develop an android app. I am using native code to run a service in the foreground. This service consists of collections the accelerometer sensor readings of the phone.
Starting the service returns a successful promise but I do not receive no events. The following is the implementation of the service class:
public class PhonePositionService extends Service {
public static final String FOREGROUND = "com.testnative.position.FOREGROUND";
...
//Event listener for sensors -start
SensorEventListener sensorEventListener = new SensorEventListener() {
#Override
public void onSensorChanged(SensorEvent event) {
PhonePositionService.this.sendMessage(event);
}
...
};
//Event Listener - end
#Override
#TargetApi(Build.VERSION_CODES.M)
public void onCreate() {
sensorManager = (SensorManager)getSystemService(SENSOR_SERVICE); //get services provided by sensor manager
mAccelerometer = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER); //specifiy sensor
sensorManager.registerListener(sensorEventListener, mAccelerometer, SensorManager.SENSOR_DELAY_NORMAL); //register it
}
private void sendMessage(SensorEvent event) {
try {
float[] values = event.values;
Intent intent = new Intent("PhonePosUpdate");
intent.putExtra("message", values);
LocalBroadcastManager.getInstance(this).sendBroadcast(intent);
} catch (Exception e) {
e.printStackTrace();
}
}
...
The thing is not even a notification appears, I'm afraid the service didnt start at all.
The Following is my Module which uses this service:
public class PhonePositionModule extends ReactContextBaseJavaModule {
public PhonePositionModule(ReactApplicationContext reactContext) {
super(reactContext);
BroadcastReceiver phonePositionReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
float[] message = intent.getFloatArrayExtra("message");
PhonePositionModule.this.sendEvent(message);
}
};
LocalBroadcastManager.getInstance(getReactApplicationContext()).registerReceiver(phonePositionReceiver, new IntentFilter("PhonePosUpdate"));
}
...
#ReactMethod
public void startService(Promise promise) {
String result = "Success";
try {
Intent intent = new Intent(PhonePositionService.FOREGROUND); ///////
intent.setClass(this.getReactApplicationContext(), PhonePositionService.class);
getReactApplicationContext().startService(intent);
} catch (Exception e) {
promise.reject(e);
return;
}
promise.resolve(result);
}
...
private void sendEvent(float[] message) {
WritableMap map = Arguments.createMap();
map.putDouble("x", message[0]);
map.putDouble("y", message[1]);
map.putDouble("z", message[2]);
getReactApplicationContext().getJSModule(DeviceEventManagerModule.RCTDeviceEventEmitter.class).emit("updatePosition", map);
}
}
When I call startService() from JavaScript, I get a success. However no notification appears and
DeviceEventEmitter.addListener('updatePosition', (Data) => {
console.log(Data);
in App.js shows nothing.
Thus:
1) The Notification does not appear
2) Given that the notification does not appear, the service did not start (even though the promise did not return an error).
I tried debugging the native code on Android Studio but logcat isn't working for me.

SignalR methods in WebApi controller not called in specific setup

Well, I have a signalR hub:
public class ReportHub : Hub
{
private static IHubContext hubContext = GlobalHost.ConnectionManager.GetHubContext<ReportHub>();
public void SendMessage(string text)
{
Clients.All.sendMessage(text);
}
public static void ServerSendMessage(string text)
{
hubContext.Clients.All.sendMessage(text);
}
}
Also I have the client code in js, on some view
report.client.sendMessage = message => {
alert('message from server: '+ message);
}
And I have webapi action, like this:
[HttpGet]
[Route("api/Report/test")]
public int GetTest()
{
ReportHub.ServerSendMessage("message");
return 42;
}
When I open the view with signalR-catching js code in one browser, and in another browser window requesting the webapi action, by typing http://../api/report/test - all working, and alert is appearing
But when I calling webapi action via postman, or any other rest client, no effect at all, report.client.sendMessage = message => {
alert('message from server: '+ message);
} - not working
Can anyone help?

ReportHub.ServerSendMessage("message");
It is wrong.
You should return ReportHubContext for the connection before pushing the data to clients;
[HttpGet]
[Route("api/Report/test")]
public int GetTest()
{
var hubContext = GlobalHost.ConnectionManager.GetHubContext<ReportHub>();
hubContext.ServerSendMessage("message");
return 42;
}

Edit /Update with Web API Repository Pattern

I'm trying to work out the very basics of updating my database using a Web API Controller that is backed by a repository pattern. So far I have everything working POST, GET, DELETE (Create, Read, Delete). But I'm missing the Update.
Below is my angular code, I'm not going to post the Angular Views/Templates, but just know that they do bind and they work just fine. My problem is only on the Edit View, where I try to update using the vm.save function. My save function works fine on the Angular side, but I'm not sure what to do on the Web API & Repository side. You will see that my code to get this working is very basic bare bones. I have all of the code pages from my project in a gist here:
All Files in Gist
Just in case you want to see the big picture, otherwise I will just put here the few pages where I am having trouble getting the Edit/Update methods to work in using http.put with Angular Controller, Web API Controller & Repository.
WORKING Angular Edit Controller:
function editFavoriteController($http, $window, $routeParams) {
var vm = this;
var url = "/api/favorites/" + $routeParams.searchId;
$http.get(url)
.success(function (result) {
vm.search = result[0];
})
.error(function () {
alert('error/failed');
})
.then(function () {
//Nothing
});
vm.update = function (id) {
var updateUrl = "/api/favorites/" + id;
$http.put(updateUrl, vm.editFavorite)
.success(function (result) {
var editFavorite = result.data;
//TODO: merge with existing favorites
//alert("Thanks for your post");
})
.error(function () {
alert("Your broken, go fix yourself!");
})
.then(function () {
$window.location = "#/";
});
};
};
NOT WORKING Web API Controller
public HttpResponseMessage Put(int id,[FromBody]Search editFavorite)
{
if (_favRepo.EditFavorite(id, editFavorite) && _favRepo.Save())
{
return Request.CreateResponse(HttpStatusCode.Created, editFavorite);
}
return Request.CreateResponse(HttpStatusCode.BadRequest);
}
NOT WORKING Repository
public bool EditFavorite(int id, Search editFavorite)
{
try
{
var search = _ctx.Search.FirstOrDefault(s => s.SearchId == id);
search(editFavorite).State = EntityState.Modified;
return true;
}
catch
{
var item = "";
}
}
WORKING Interface
bool EditFavorite(int id, Search newSearch);
Again, my only problems are figuring out what to do for the update in the WebAPI FavoritesController and FavoritesRepository. I have example of how I have done everything else in the Gist, so I'm hoping someone might be able to help me out. I'm just hitting a wall of what I know how to do in Web API.

Fixed Code:
public HttpResponseMessage Put(int id,[FromBody]Search editFavorite)
{
if (_favRepo.EditFavorite(id, editFavorite))
{
_favRepo.Save()
return Request.CreateResponse(HttpStatusCode.Created, editFavorite);
}
return Request.CreateResponse(HttpStatusCode.BadRequest);
}
I am also posting code which should work fine for handling edit on server side using WEB API and Repository Pattern.
WebAPI Controller:
public HttpResponseMessage Put(int id,[FromBody]Search editFavorite)
{
if (!ModelState.IsValid || id != editFavorite.Id)
{
return Request.CreateResponse(HttpStatusCode.BadRequest);
}
db.EditFavorite(editFavorite);
try
{
db.Save();
}
catch (DbUpdateConcurrencyException)
{
if (!db.SearchExists(id))
{
return Request.CreateResponse(HttpStatusCode.NotFound);
}
else
{
throw;
}
}
return Request.CreateResponse(HttpStatusCode.Created, editFavorite);
}
Repository Method:
public void EditFavorite(Search editFavorite)
{
db.Entry(editFavorite).State = EntityState.Modified;
}
public void Save()
{
db.SaveChanges();
}
public bool SearchExists(int id)
{
return db.Search.Count(e => e.Id == id) > 0;
}
Modify Interface:
void Save();
void EditFavorite(Search newSearch);
bool SearchExists(int id);
Edit:
I have made some changes so that only operations that are carried out on your db context is done in repository layer (Data Layer) and the error checking is done in the WEB API Controller.
Suggestion:
You should inherit IDisposable on the interface and implement it your repository class so that your entities are properly disposed...
public interface IFavoritesRepository : IDisposable
{
// code here
}
public class FavoritesRepository : IFavoritesRepository
{
// code here
private bool disposed = false;
protected virtual void Dispose(bool disposing)
{
if (!this.disposed)
{
if (disposing)
{
db.Dispose();
}
}
this.disposed = true;
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
}