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Google SignIn Demo

Description

A demo of the very basic (so far) support in Kastri for Google SignIn on Android and iOS

Supported Delphi versions

Delphi 12, Delphi 11.x. It should also work in Delphi 10.4.2, and perhaps earlier.

Project Configuration

In order to use this demo, you will need to follow the steps at the "Getting Started with the Google SignIn SDK" section of Grijjy's readme. Note that at the time of writing, the Grijjy implementation is based on Delphi 10.2, and is a few years out of date, so please just focus on that section.

In Unit1.pas of the demo, replace the values for cClientID with the respective ClientID for Android and iOS. As per the Grijjy documentation, the Client ID value for Android is in the google-services.json file in the oauth_client member where client_type has a value of 3. The Client ID value for iOS is at the Google Cloud Credentials page, in the OAuth 2.0 Client IDs section, where the name will be of the format:

iOS client for com.yourdomain.projectname (auto created by Google Service)`

where com.yourdomain.projectname is the identifier you used for the project in Firebase Console.

Build Event/Android Manifest

Delphi 12.1, when not using Codex 2.3.1:

Due to changes in the Android build process:

  • Remove the Build Events in Project Options for Android 32-bit and Android 64-bit

  • Deploy the project at least once - this will create AndroidManifest.template.xml

  • Modify AndroidManifest.template.xml to add the following just before <%application-metadata%>

    <meta-data android:name="com.google.android.gms.version" android:value="12451000" />

    ..add the following just after <%services%>:

      <service android:name="com.google.android.gms.auth.api.signin.RevocationBoundService"
    android:exported="true"
    android:permission="com.google.android.gms.auth.api.signin.permission.REVOCATION_NOTIFICATION"
    android:visibleToInstantApps="true" />

    ..add the following just after the </application> end tag:

      <activity android:name="com.google.android.gms.auth.api.signin.internal.SignInHubActivity"
    android:excludeFromRecents="true"
    android:exported="false"
    android:theme="@android:style/Theme.Translucent.NoTitleBar" />

Delphi 12.0 or earlier:

Configure Build Events in Project Options to add a Post-Build event with the command:

  [kastri]\Tools\manifestmerge AndroidManifest.merge.xml $(Platform)\$(Config)\AndroidManifest.xml

Where [kastri] is the path to the Kastri library. Do this for each required Android platform target (i.e. 32-bit and/or 64-bit)

AndroidManifest.merge.xml can be found in the root folder of the demo, and should be copied to the root folder of your project

Android (32 bit and 64 bit where required)

  • In the Project Options, modify the Package value in the Version Info section to be the value specified in your Firebase Project

iOS

  1. Go to this link, download Firebase.zip, and extract it somewhere convenient

  2. In the IDE Options > Environment Variables, create a user override called Firebase which points to the unzipped SDK, or modify Framework search path in the Project Options for iOS Device 64-bit to point to the unzipped SDK

  3. In the Project Options for iOS Device 64-bit, modify the CFBundleIndentifier value in the Version Info section to use the identifier that corresponds to your App ID

  4. Modify info.plist.TemplateiOS.xml to replace the string value inside the array for the CFBundleURLSchemes key with your iOS ClientID however in REVERSE notation. (See the example in the demo files)

  5. Add the following iOS SDK frameworks as per these instructions:

    AuthenticationServices

Integration into your own project

  • Please follow the steps as per the Configuration section
  • In the Project Manager, under the Android target, right-click the Libraries node and add (from the Kastri files): 
    Lib\dw-google-signin.jar
ThirdParty\Android\play-services-auth-19.2.0.jar
ThirdParty\Android\play-services-auth-base-17.1.3.jar
  • In the Project Options, ensure that you have a Post Build event for merging the manifest, as per the demo. You may need to modify the command to suit your file locations.
  • In the Project Options, ensure that the search path for all platforms includes folders from the Kastri repo as per the demo
  • In the Project Options, ensure that the Framework search path for iOS Device 64-bit includes the Firebase SDK paths as per the demo

Note:

Due to a bug in Delphi 11.3 ONLY, if you need to compile for Android 64-bit, you will either need to apply this workaround (which will apply to all projects), OR copy the jar file(s) to another folder, and add them to the Libraries node of the Android 64-bit target. (Adding the same .jar file(s) to Android 64-bit does not work)