I have tried to get an authenticated proxy working, this is the best code I have , and it is not working, and neither is anything else I have tried. 

String port = "2114";
        String username = "huifxsco";
        String password = "of1lvb6d2o9l";
        final String authUser = username;
        final String authPassword = password;

        System.setProperty("http.proxyHost", host);
        System.setProperty("http.proxyPort", port);
        System.setProperty("http.proxyUser", authUser);
        System.setProperty("http.proxyPassword", authPassword);

        Authenticator.setDefault(
                new Authenticator() {
                    public PasswordAuthentication getPasswordAuthentication() {
                        return new PasswordAuthentication(authUser, authPassword.toCharArray());
                    }
                }
        );

Can I get some kind of permissions for this with easypermissions?


Android connect to authenticated proxy java

 How can i save the value in the Counter? If i start my Code, then the button is working, but it will reset to zero, so if i click the "+" Button, so it is always by 1. And when i click the "-" Button, then the count is by "-1". It does not go upper or lower. And every 24h i want a reset to zero. Can someone help me? 

import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.widget.RemoteViews;

import java.lang.reflect.Type;

public class Water extends AppWidgetProvider {

    private static final String MyOnClickPlus = "Plus";
    private static final String MyOnClickMinus = "Minus";
    int sum = 0;

    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
        RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.water);
        views.setOnClickPendingIntent(R.id.btnplus, getPendingSelfIntent(context, MyOnClickPlus));
        views.setOnClickPendingIntent(R.id.btnminus, getPendingSelfIntent(context, MyOnClickMinus));


        appWidgetManager.updateAppWidget(appWidgetIds, views);
        super.onUpdate(context, appWidgetManager, appWidgetIds);
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub
        RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.water);

        if(intent.getAction().toString() == MyOnClickPlus){
            sum += 1;
            views.setTextViewText(R.id.mengeheute, Integer.toString(sum));
        }
        else if(intent.getAction().toString() == MyOnClickMinus) {
            sum -= 1;
            views.setTextViewText(R.id.mengeheute, Integer.toString(sum));
        }
        updateWidget(context, views);
        super.onReceive(context, intent);
    }

    protected static PendingIntent getPendingSelfIntent(Context context, String action) {
        Intent intent = new Intent(context, Water.class);
        intent.setAction(action);
        return PendingIntent.getBroadcast(context, 0, intent, 0);
    }

    void updateWidget(Context context, RemoteViews remoteViews){
        ComponentName widgetComponent = new ComponentName(context, Water.class);
        AppWidgetManager.getInstance(context).updateAppWidget(widgetComponent, remoteViews);
    }
 

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.water">

    <application
        android:allowBackup="true"
        android:icon="@drawable/drinkwater"
        android:label="@string/app_name"
        android:roundIcon="@drawable/drinkwater"
        android:supportsRtl="true"
        android:theme="@style/Theme.Water">

        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <receiver
            android:name=".Water"
            android:exported="true">
            <intent-filter>
                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />

            </intent-filter>

            <meta-data
                android:name="android.appwidget.provider"
                android:resource="@xml/water_info" />
        </receiver>
    </application>

</manifest>

Android Studio: How to create a counter by Button click in a widget?

I'm curently working on an application that has register/login form of a user and a shop, whenever a user is loged in with it's credentials the User Profile is being displayed and a QR code with it's data is being created.

Whenever a shop is logged in it can scan the User's QR code and show it's credentials, I'm trying to figure out how can I store user's credentials when scanned to a new path created on the Firebase to show in which shop the user has entered.

I'm thinking that somehow whenever the shop is scanning the QR code of the user, it is going to store the data to some strings and then a new "field" will be created in Firebase.

Also the library that I'm using for the QR code is the Zxing library.

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