The Firebase Realtime Database Test Application (testapp) demonstrates Firebase Realtime Database operations with the Firebase Realtime Database C++ SDK. The application has no user interface and simply logs actions it's performing to the console.

The testapp performs the following:

• Creates a firebase::App in a platform-specific way. The App holds platform-specific context that's used by other Firebase APIs, and is a central point for communication between the Firebase Realtime Database C++ and Firebase Auth C++ libraries.
• Gets a pointer to firebase::Auth, and signs in anonymously. This allows the testapp to access a Firebase Database instance with authentication rules enabled, which is the default setting in Firebase Console.
• Gets a DatabaseReference to the root node's "test_app_data" child, uses DatabaseReference::PushChild() to create a child with a unique key underneath it to work in, and gets a reference to that child, which the testapp will use for the remainder of its actions.
• Sets some simple values (numbers, bools, strings, timestamp) and reads them back to ensure the database can be read from and written to.
• Runs a transaction, using DatabaseReference::RunTransaction(), and validates that its results were applied properly.
• Runs DatabaseReference::UpdateChildren to update multiple children at once.
• Uses Query to narrow down the view from a DatabaseReference.
• Sets up a ValueListener to watch for data value changes at a given database location.
• Sets up a ChildListener to watch for changes in the list of children at a database location.
• Sets up OnDisconnect actions to make changes to the database on disconnect, then disconnects from the database to confirm the actions are performed.
• Shuts down the Firebase Database, Firebase Auth, and Firebase App systems.

• Read more about Firebase Realtime Database

• Link your iOS app to the Firebase libraries.
  • Get CocoaPods version 1 or later by running,

    $ sudo gem install CocoaPods --pre
    

  • From the testapp directory, install the CocoaPods listed in the Podfile by running,

    $ pod install
    

  • Open the generated Xcode workspace (which now has the CocoaPods),

    $ open testapp.xcworkspace
    

  • For further details please refer to the general instructions for setting up an iOS app with Firebase.
• Register your iOS app with Firebase.
  • Create a new app on the Firebase console, and attach your iOS app to it.
    • You can use "com.google.firebase.cpp.database.testapp" as the iOS Bundle ID while you're testing. You can omit App Store ID while testing.
  • Add the GoogleService-Info.plist that you downloaded from Firebase console to the testapp root directory. This file identifies your iOS app to the Firebase backend.
  • In the Firebase console for your app, select "Auth", then enable "Anonymous". This will allow the testapp to use anonymous sign-in to authenticate with Firebase Database, which requires a signed-in user by default (an anonymous user will suffice).
• Download the Firebase C++ SDK linked from https://firebase.google.com/docs/cpp/setup and unzip it to a directory of your choice.
• Add the following frameworks from the Firebase C++ SDK to the project:
  • frameworks/ios/universal/firebase.framework
  • frameworks/ios/universal/firebase_auth.framework
  • frameworks/ios/universal/firebase_database.framework
  • You will need to either,
    1. Check "Copy items if needed" when adding the frameworks, or
    2. Add the framework path in "Framework Search Paths"
       • e.g. If you downloaded the Firebase C++ SDK to /Users/me/firebase_cpp_sdk, then you would add the path /Users/me/firebase_cpp_sdk/frameworks/ios/universal.
       • To add the path, in XCode, select your project in the project navigator, then select your target in the main window. Select the "Build Settings" tab, and click "All" to see all the build settings. Scroll down to "Search Paths", and add your path to "Framework Search Paths".
• In XCode, build & run the sample on an iOS device or simulator.
• The testapp has no interative interface. The output of the app can be viewed via the console or on the device's display. In Xcode, select "View --> Debug Area --> Activate Console" from the menu to view the console.

• Register your Android app with Firebase.
  • Create a new app on the Firebase console, and attach your Android app to it.
    • You can use "com.google.firebase.cpp.database.testapp" as the Package Name while you're testing.
    • To generate a SHA1 run this command on Mac and Linux,

      keytool -exportcert -list -v -alias androiddebugkey -keystore ~/.android/debug.keystore
      

      or this command on Windows,

      keytool -exportcert -list -v -alias androiddebugkey -keystore %USERPROFILE%\.android\debug.keystore
      

    • If keytool reports that you do not have a debug.keystore, you can create one with,

      keytool -genkey -v -keystore ~/.android/debug.keystore -storepass android -alias androiddebugkey -keypass android -dname "CN=Android Debug,O=Android,C=US"
      

  • Add the google-services.json file that you downloaded from Firebase console to the root directory of testapp. This file identifies your Android app to the Firebase backend.
  • In the Firebase console for your app, select "Auth", then enable "Anonymous". This will allow the testapp to use anonymous sign-in to authenticate with Firebase Database, which requires a signed-in user by default (an anonymous user will suffice).
  • For further details please refer to the general instructions for setting up an Android app with Firebase.
• Download the Firebase C++ SDK linked from https://firebase.google.com/docs/cpp/setup and unzip it to a directory of your choice.
• Configure the location of the Firebase C++ SDK by setting the firebase_cpp_sdk.dir Gradle property to the SDK install directory. For example, in the project directory:

  > echo "systemProp.firebase\_cpp\_sdk.dir=/User/$USER/firebase\_cpp\_sdk" >> gradle.properties
  

• Ensure the Android SDK and NDK locations are set in Android Studio.
  • From the Android Studio launch menu, go to File/Project Structure... or Configure/Project Defaults/Project Structure... (Shortcut: Control + Alt + Shift + S on windows, Command + ";" on a mac) and download the SDK and NDK if the locations are not yet set.
• Open build.gradle in Android Studio.
  • From the Android Studio launch menu, "Open an existing Android Studio project", and select build.gradle.
• Install the SDK Platforms that Android Studio reports missing.
• Build the testapp and run it on an Android device or emulator.
• The testapp has no interactive interface. The output of the app can be viewed on the device's display, or in the logcat output of Android studio or by running "adb logcat *:W android_main firebase" from the command line.

• Due to the way Firebase Realtime Database interacts with JSON, it is possible that if you set a location to an integral value using a firebase::Variant of type Int64, you may get back a firebase::Variant of type Double when later retrieving the data from the database. Be sure to check the types of Variants or use methods such as Variant::AsInt64() to coerce their types before accessing the data within them.

https://firebase.google.com/support/

Copyright 2016 Google, Inc.

Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.