B4A Library Google Plus SDK Wrapper + Native Google +1Button

Periklis Koutsogiannis · Jun 29, 2014

Introduction

This is my second contribution to the discovery of the decade (#b4a-rocks) and the fun continues!

Used SocialApi classes:

GooglePlusProvider: A non activity object that must be declared in any Sub Process_Globals.
GooglePlusOneButton: A CustomView (implements DesignerCustomView) that can be used design-time.
SocialApiActivity: An activity object that can be only declared in a Sub Globals and is used to bind a GooglePlusProvider object to an activity through the GooglePlusProvider.SetActivity method.

Getting started

Download the latest socialapi package, extract it anywhere on your hard disk and note the folder name.
Copy the wrapper files (jar + xml) in the socialapi folder into your B4A Libraries folder.
Each sample in the socialapi\googleplus\samples folder has AdditionalRes and AdditionalJar directives that have to be changed. Change the C:\b4a-dev folder to where you have extracted the socialapi archive.

The samples folder contains:

Sample1: Quick start sample that can be used as a bare-bone template for your new apps

Step-by-step new app tutorial (based on Sample1)

1. Add following code to your manifest:

B4X:

AddApplicationText(
    <meta-data
        android:name="com.google.android.gms.version"
        android:value="@integer/google_play_services_version"/>)

2. Add following directives to your project's main file:

B4X:

#AdditionalRes: <your-installation-folder>\socialapi\googleplus\sdk\res, com.google.android.gms
#AdditionalJar: <your-installation-folder>\socialapi\googleplus\sdk\gplussdk.jar

3. Select the SocialApi library from the list of the available libraries in the IDE. Declare a GooglePlusProvider and a SocialApiActivity object in Sub Process_Globals and Sub Globals respectively

B4X:

Sub Process_Globals
    'These global variables will be declared once when the application starts.
    'These variables can be accessed from all modules.

    Dim GooglePlus As GooglePlusProvider
End Sub

Sub Globals
    'These global variables will be redeclared each time the activity is created.
    'These variables can only be accessed from this module.

    Dim ThisActivity As SocialApiActivity
End Sub

4. Drop a CustomView in the designer and set the CustomType property to GooglePlusOneButton. Then, Generate a Click handler.

B4X:

Sub BtnPlusOne_Click
    Log("+1 Clicked!")
End Sub

5. Call the GooglePlusProvider.SetActivity method in your Sub Activity_Resume in order to bind the GooglePlusProvider instance to the current activity passing the name of the event that will be raised every time the GooglePlus session changes. Also, call the BtnPlusOne.SetUrl to set the button's destination url.

B4X:

Sub Activity_Resume
    BtnPlusOne.SetUrl("http://www.b4x.com")
    GooglePlus.SetActivity(ThisActivity.Initialize("googleplus"))
End Sub

6. Create your event handlers

B4X:

Sub GooglePlus_Event (Provider as SocialApiProvider)
    BtnConnect.Enabled = Not(Provider.Connected)
    BtnDisconnect.Enabled = Provider.Connected
End Sub

Sub GooglePlust_Connected (Provider as SocialApiProvider)
    Msgbox(Provider.Me, "!")
End Sub

Sub GooglePlus_Disconnected (Provider as SocialApiProvider)
    Msgbox("Bye bye!", "JustDisconnected!")
End Sub

Sub GooglePlust_Failed (Provider as SocialApiProvider)
    If Msgbox2("Failed to actualize your details."&CRLF&CRLF&"Retry?", "Error", "Yes", "No", "", Null) = DialogResponse.POSITIVE Then
        Provider.Retry
    End If
End Sub

7. Create the login/logout handlers. The login and logout actions are performed asynchronously

B4X:

Sub BtnConnect_Click
    GooglePlus.Login
End Sub

Sub BtnDisconnect_Click
    GooglePlus.Logout
End Sub

8. Do something and evaluate the result

B4X:

Sub BtnGetPeopleVisible_Click
    GooglePlus.PleaseWaitText = "Getting people information"
    Dim Result As GooglePlusResult = GooglePlus.GetPeopleVisible
    Msgbox(Result, "Done")
End Sub

Sub BtnGetPeople_Click
    GooglePlus.PleaseWaitText = "Getting Erel's and Periklis' details"
    Dim Result As GooglePlusResult = GooglePlus.GetPeople(Array As String ("102781867331980802136", "+PeriklisKoutsogiannis"))
    Msgbox(Result, "Done")
End Sub

Done! Now we have to setup our app in our Google+ developer dashboard.

Setup our app in the Google+ developer dashboard (courtesy of androidhive.info)

1. Get your SHA1 fingerprint from B4A IDE

2. Open Google APIs console and on the left, under APIs & auth section, click on APIs and on the right enable Google+ API service.

3. Now again on the left, click on Credentials and on the right, click on CREATE NEW CLIENT ID button. It will open a popup to configure a new client id.

4. In the popup, select Installed application as Application type. Under Installed application type section select Android and give your project package name. This package name should be equal to your android project. For the sake of the example the package name is info.androidhive.gpluslogin. Enter your SHA1 fingerprint (from step 1) in Signing certificate fingerprint (SHA1) field and enable Deep Linking and click on Create Client ID button.

5. Now you should see a new client created for your android application.

Done! You are ready to go!

Useful links

Best Android emulator: http://www.genymotion.com
Cool Git Manager (windows): http://www.syntevo.com/smartgithg/

Please test and post any feedback, questions, comments you may have!
That's all for now folks!~

Version history until SocialApi 2.3

2.3

Restructured again into a single package (socialapi) after finding out how to properly use the #AdditionalRes directive to avoid conflict with other b4a libraries

2.2

Restructured due to a conflict with AdMod library and GooglePlusProvider has its own package

2.0

Now part of the SocialApi unified wrapper library
Major code refactoring
Renamed: GooglePlus -> GooglePlusProvider
Renamed: WrapperActivity -> SocialApiActivity
Renamed: WrapperActivity.Initialize -> SocialApiActivity.GetWithEvent
Added: Google +1 button custom view

1.2

Change: Complete code refactoring. Now using our SocialApiWrapper library that provides common functionality to our SDK wrappers

1.1

Added: GooglePlus.GetPeopleVisible

1.0

Initial version

Periklis Koutsogiannis · Jun 30, 2014

Clean your project.

Also if you are using both SDKs you have to have 2 WrapperActivity objects:

B4X:

Sub Process_Globals
    'These global variables will be declared once when the application starts.
    'These variables can be accessed from all modules.

    Dim FB As Facebook
    Dim GP As GooglePlus
End Sub

Sub Globals
    'These global variables will be redeclared each time the activity is created.
    'These variables can only be accessed from this module.

    Private BtnConnect As Button
    Private BtnDisconnect As Button

    Dim FBActivity As WrapperActivity
    Dim GPActivity As WrapperActivity
End Sub

Sub Activity_Resume

    FB.SetActivity(FBActivity.Initialize("facebook_status_changed"))
    GP.SetActivity(GPActivity.Initialize("googleplus_status_changed"))
End Sub

Sub facebook_status_changed
End Sub

Sub googleplus_status_changed
End Sub

Douglas Farias · Jun 30, 2014

finally *-*

my sha1 is incorrect ths is changed when i close the b4a *-*

thx man now is working fine *-*

Periklis Koutsogiannis · Jun 30, 2014

Nice!

Please check my previous post about the 2 WrapperActivity objects. Your code as it was posted will not work correctly.

Douglas Farias · Jun 30, 2014

yes i have added xD thx man realy thx

Periklis Koutsogiannis · Jun 30, 2014

Ratna Fang · Jul 1, 2014

many thanks for this lib periklis
it helps me much for connecting to G+

Periklis Koutsogiannis · Jul 2, 2014

Upcoming version will include a +1 button

Periklis Koutsogiannis · Jul 2, 2014

Update: 2.0

Now part of the SocialApi unified wrapper library
~~Major code refactoring~~
~~Renamed: GooglePlus -> GooglePlusProvider~~
~~Renamed: WrapperActivity -> SocialApiActivity~~
~~Renamed: WrapperActivity.Initialize -> SocialApiActivity.GetWithEvent~~
~~Added: Google +1 button custom view~~

How to migrate from previous versions:

Delete GooglePlus.jar SimpleApiWrapper.jar and GooglePlus.xml SimpleApiWrapper.xml from your B4A Libraries folder
Download the latest gplussdk.zip, delete the old folder and extract the contents of the new one
Select the SocialApi library from the list of the available libraries in the IDE
Rename all mentioned classes in the change log above

Done!

GMan · Jul 2, 2014

Well done, so next step is the FB LikeButton ?

Periklis Koutsogiannis · Jul 2, 2014

Thanks!

Unfortunately, Facebook does not expose the FB like button in Android.

GMan · Jul 2, 2014

Ah, OK - and Posting something or sending Picture ?

Periklis Koutsogiannis · Jul 2, 2014

If you mean Google+, will come soon

GMan · Jul 2, 2014

best both ;-)

Periklis Koutsogiannis · Jul 2, 2014

In facebook you can already use FacebookProvider.UploadPhoto and FacebookProvider.PublishPost

See sample2

GMan · Jul 2, 2014

Thx...read it aber deleted it (as it seems) in my cpu

brelto85 · Jul 3, 2014

is possible upload a photo to user's dashboard with this library?

Periklis Koutsogiannis · Jul 4, 2014

@brelto85, no it is not. Google does not allow publishing yet.

Periklis Koutsogiannis · Jul 5, 2014

Update: 2.2

~~Restructured due to a conflict with AdMod library and GooglePlusProvider has its own package. Please read the Getting started for updated installation instructions!~~

Periklis Koutsogiannis · Jul 6, 2014

New version available!

From now on, all updates will posted in the unified SocialApi thread below.

SocialApi 2.3
http://www.b4x.com/android/fo...ocial-connect-using-multiple-providers.42532/

JeanLC · Aug 17, 2015

Hello,
How can I retrieve the google token?

Using this library/wrapper... After Google one button sign-in, and authenticated by the App and Google.
How can I retrieve the token?
The token the app can send to a backend server to check user authentication with google.
In the API it's GoogleAuthUtil.getToken
then you check from backedn server with https://www.googleapis.com/oauth2/v3/tokeninfo?id_token=<how to get this token>
and you confirm the info from google with a response like this:
{
"iss": "https://accounts.google.com",
"sub": "110169484474386276334",
"azp": "1008719970978-hb24n2dstb40o45d4feuo2ukqmcc6381.apps.googleusercontent.com",
"email": "billd1600@gmail.com",
"at_hash": "X_B3Z3Fi4udZ2mf75RWo3w",
"email_verified": "true",
"aud": "1008719970978-hb24n2dstb40o45d4feuo2ukqmcc6381.apps.googleusercontent.com",
"iat": "1433978353",
"exp": "1433981953"
}
so the server knows that's the real user without additional sign-in.

https://developers.google.com/identity/sign-in/android/backend-auth

Thanks

B4A Library Google Plus SDK Wrapper + Native Google +1Button

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