1.02 connect firebase to your app solution

app/build.gradle

@@ -17,10 +17,23 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
         debug {
-
         }
     }
 
+    /* This for anyone following along with the repo. Since you will have a different
+     * root URL, this code loads up a value from your gradle.properties file.
+     */
+
+    buildTypes.each {
+        it.buildConfigField 'String', 'UNIQUE_FIREBASE_ROOT_URL', UniqueFirebaseRootUrl
+    }
+
+    packagingOptions {
+        exclude 'META-INF/LICENSE'
+        exclude 'META-INF/LICENSE-FIREBASE.txt'
+        exclude 'META-INF/NOTICE'
+    }
+
 }
 
 dependencies {
@@ -30,6 +43,8 @@ dependencies {
     compile 'com.android.support:support-v4:23.0.1'
     compile 'com.android.support:cardview-v7:23.0.1'
 
+    compile 'com.firebase:firebase-client-android:2.4.0'
+
     /* For Google Play Services */
     compile 'com.google.android.gms:play-services-safetynet:8.3.0'
     compile 'com.google.android.gms:play-services-auth:8.3.0'

app/src/main/AndroidManifest.xml

@@ -2,6 +2,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.udacity.firebase.shoppinglistplusplus">
 
+    <uses-permission android:name="android.permission.INTERNET" />
+
     <application
         android:name="com.udacity.firebase.shoppinglistplusplus.ShoppingListApplication"
         android:allowBackup="true"

app/src/main/java/com/udacity/firebase/shoppinglistplusplus/ShoppingListApplication.java

@@ -1,5 +1,7 @@
 package com.udacity.firebase.shoppinglistplusplus;
 
+import com.firebase.client.Firebase;
+
 /**
  * Includes one-time initialization of Firebase related code
  */
@@ -8,6 +10,8 @@ public class ShoppingListApplication extends android.app.Application {
     @Override
     public void onCreate() {
         super.onCreate();
+        /* Initialize Firebase */
+        Firebase.setAndroidContext(this);
     }
 
 }

app/src/main/java/com/udacity/firebase/shoppinglistplusplus/utils/Constants.java

@@ -1,5 +1,7 @@
 package com.udacity.firebase.shoppinglistplusplus.utils;
 
+import com.udacity.firebase.shoppinglistplusplus.BuildConfig;
+
 /**
  * Constants class store most important strings and paths of the app
  */
@@ -19,6 +21,7 @@ public final class Constants {
     /**
      * Constants for Firebase URL
      */
+    public static final String FIREBASE_URL = BuildConfig.UNIQUE_FIREBASE_ROOT_URL;
 
 
     /**