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Rest api in android

Juraj Puchký
Try this

Java: 
public final class FromUrlHelper {

    public static JSONObject getJSONObject(String url) throws IOException {
        if (Constants.debug) Log.d("API Call", url);
        JSONObject jsonObject = null;
        try {
            jsonObject = new JSONObject(FromUrlHelper.getJSONFromUrl(url));
        } catch (JSONException e) {
            e.printStackTrace();
        }

        return jsonObject;
    }
}

then call for example API like this

Java: 
public class AuthService {
    private static AuthService ourInstance = null;

    public static AuthService getInstance() {
        if (ourInstance == null) {
            ourInstance = new AuthService();
        }

        return ourInstance;
    }

    private String currentSession;
    private boolean loggined;

    private AuthService() {
    }

    public boolean login(String email, String password) {

        if (!email.isEmpty() && !password.isEmpty()) {
            try {
                JSONObject result = FromUrlHelper.getJSONObject(Constants.serviceBaseUrl + "login?email=" + email + "&password=" + password);
                try {
                    int errorCode = result.getInt("errorCode");
                    if (errorCode == 0) {
                        this.currentSession = result.getString("sessionId");
                        loggined = true;
                        return true;
                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return false;
    }

    public boolean logout() {
        loggined = false;
        this.currentSession = null;
        return true;
    }
}

In Activity you can call this

Code: 
AuthService authService = AuthService.getInstance();

if(authService.login("email","password")) {
    // do something
} else {
    // do something
}

In PHP API server it can look like this.

PHP: 
        $customer = $this->entityManager->getRepository(Customer::class)->findOneBy(['email' => $request->get('email'), 'password' => md5($request->get('password')), 'eshop' => $eshop]);
        if ($customer) {
            /** @var Session $session */
            $session = $this->getSessionFromCustomer($customer);
            if(!$session) {
                $sessionId = $this->createSession($customer);
            } else {
                $sessionId = $session->getCode(); 
            }
            $response->errorCode = self::ERR_OK;
        } else {
            $sessionId = null;
            $response->errorCode = self::ERR_AUTH;
        }

        $response->sessionId = $sessionId;

        return new JsonResponse($response);
Click to expand...

Next in contactless payments...Smile to Pay.

mikedt
Steven58 said:
Having been an Annual Passholder for what I believe to be twice in the last ten years, I am fully aware and have experience with that personally. There is no way out of it, I guess.
Click to expand...

I have used those Disney fingerprint scanners at Shanghai and Hong Kong Disney parks, and I now know their real purpose, to stop people cheating with the season passes. But they did give me thoughts of big brother 1984, and chilling effects. Especially as the only other organization that's taken an interest in recording my fingerprints is the Ministry of Public Security of the PRC, and have to use similar scanners to the Disney ones every-time I pass through Beijing Airport.

Does The Walt Disney Company give law enforcement and other govt TLAs access to their fingerprint database?
Click to expand...

No sound from phone speakers on Bluetooth

R
Up until about a month ago, if I connected my phone via Bluetooth to my car, my phone notifications still made sound on the phone. Then an app called Smart Things seemed to hijack my phone any time I used Bluetooth. Do I need to be using that app to play through the car speakers (which I do with podcasts, etc). I still want my phone to play the notifications.

I did turn off (force stop) Smart Things, but the notifications still aren't playing when on Bluetooth. Any ideas what I've done?
Click to expand...

AsyncThread cancelled even is success background opration onPostExecute not called

Juraj Puchký
I found solution error was in the wrong URL of API service it causes that returns HTML 404 instead of JSON


Juraj Puchký said:
Hi,

i have problem with my application, i have following AsyncTask and even is
executed it goes to onCancelled instead of onPostExecute.
Java: 
    private class UserRegisterTask extends AsyncTask<Boolean, Boolean, Boolean> {

        private final String mEmail;
        private final String mPassword;
        private final String mFirstName;
        private final String mLastName;
        private final String mAddress1;
        private final String mAddress2;
        private final String mCity;
        private final String mZip;
        private final String mState;
        private final ProgressDialog dialog;
        private final boolean mNewsletter;

        private boolean registered = false;

        public UserRegisterTask(Activity activity, String email, String password, String firstname, String lastname, String address1, String address2, String city, String zip, String state, boolean newsletter) {
            mEmail = email;
            mPassword = password;
            mFirstName = firstname;
            mLastName = lastname;
            mAddress1 = address1;
            mAddress2 = address2;
            mCity = city;
            mZip = zip;
            mState = state;
            mNewsletter = newsletter;
            dialog = new ProgressDialog(activity);
        }


        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            registering = true;
            dialog.setMessage("Registruji a přihlašuji, prosím čekejte...");
            dialog.setCanceledOnTouchOutside(false);
            dialog.show();
        }

        @Override
        protected void onCancelled() {
            super.onCancelled();
            dialog.dismiss();
            registering = false;
            Toast.makeText(getBaseContext(), R.string.registration_cancelled, Toast.LENGTH_SHORT).show();
        }

        @Override
        protected Boolean doInBackground(Boolean... booleans) {
            registered = authService.register(mFirstName, mLastName, mEmail, mPassword, mCity, mAddress1, mAddress2, mZip, mState, mNewsletter);
            return Boolean.TRUE;
        }

        @Override
        protected void onPostExecute(Boolean success) {
            super.onPostExecute(success);
            dialog.dismiss();

            if (success && registered) {
                Toast.makeText(getBaseContext(), R.string.registration_success, Toast.LENGTH_LONG).show();
                redirectToHomepage();
            } else {
                email.setError(getString(R.string.email_is_already_registered));
                email.requestFocus();
            }
        }
    }
Click to expand...
Click to expand...

Runs slow

svim
The Settings >> Battery menu is pretty basic but it's a good way to keep track of what apps/processes are running in the background too, and it's functionality that's already a part of your Android OS. If you want something more elaborate, try installing the Glasswire Data Usage app:
https://play.google.com/store/apps/details?id=com.glasswire.android&hl=en_US
Note that it's also a multi-function utility so look into the app's Settings menu to disable what you don't want or need.
Click to expand...

Emulator Problem

Shelby Swayze
Tony,
I was on lesson 10. Java Arrays but I backed up trying to see if I screwed up. I'm going through #6 now trying to ignore my inability to make my project respond like the instructor's project. Don't worry I'll hang in there trying to get what I can out of the course. Thanks for your efforts and comments. I'm concurrently learning B4A app code. That, I've been working on for a year.
Click to expand...

Is Spotify using up my Data?

J
Of course! It will use your data when you are listening to Spotify music, especially for you are using a free account.
Although it's a free streaming music service, it only allows you to listen to them online.
If you subscribed to its premium plan, you can download them offline when you are under WiFi connection.
Don't want to pay for that, you can choose to install AudFree Spotify Music Converter to download and convert Spotify music offline and then it's also available for using Spotify without using data.
Click to expand...

Android 10 - 2-button card navigation changed

Hadron
The "swipe up and scroll" behaviour was the same in Android 9. You just didn't use it.

The "pull the pill to one side and hold it" has gone. I think Google just focussed on their new "all gesture" model and broke things that didn't fit, but since they also tied that to their launcher it's useless to those who don't want to use the very limited Pixel launcher. Oh, and their way of handling app switching with the Android 10 gestures is unavoidably slower and more awkward, because they are total numpties when it comes to UI design (I seriously don't understand how they are so useless at this: both the flaws and the solutions are so damned obvious a small child could see them, but it's beyond Google's ability).

It doesn't bother me so much because I never used the sideways pull on the button anyway, so the gesture I always used works the way it always did. But yeah, Google are morons, there really is little else to say about it.
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