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facebook_sign_in

Flutter plugin implementing native Facebook sdks for authentication. This plugin works on iOS and Android.

Android Setup (The example app includes an example of the implementation)

Step 1

• In android/app/src/main/res create a new map called "values" (you can skip this if you already have this map).
• Create a new file in the "values" directory called "strings.xml" (you can skip this if you already have this file).
• If you just created the "strings.xml" file, add the following code (leave out the "resources" tags if you got them already):

<resources>
    <string name="facebook_app_id">XXX</string>
    <string name="fb_login_protocol_scheme">XXX</string>
</resources>

• Replace the XXX with your Facebook app id (leave the "fb" prefix in the second string).

Step 2

• Navigate to android/app/src/main/AndroidManifest.xml.
• In the "application" tags, add the following code at the top:

<meta-data android:name="com.facebook.sdk.ApplicationId" 
    android:value="@string/facebook_app_id"/>

• Add the following code after the "activity" tags:

<activity
    android:name="com.facebook.CustomTabActivity"
    android:exported="true">
    <intent-filter>
        <action android:name="android.intent.action.VIEW" />
        <category android:name="android.intent.category.DEFAULT" />
        <category android:name="android.intent.category.BROWSABLE" />
        <data android:scheme="@string/fb_login_protocol_scheme" />
    </intent-filter>
</activity>

Here is a template of what the application tag should look like:

<application android:name="io.flutter.app.FlutterApplication" android:label="facebook_sign_in_example" android:icon="@mipmap/ic_launcher">
    <meta-data android:name="com.facebook.sdk.ApplicationId" 
        android:value="@string/facebook_app_id"/>
    <activity android:name=".MainActivity"
                android:launchMode="singleTop"
                android:theme="@android:style/Theme.Black.NoTitleBar"
                android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection"
                android:hardwareAccelerated="true"
                android:windowSoftInputMode="adjustResize">
        <intent-filter>
            <action android:name="android.intent.action.MAIN"/>
            <category android:name="android.intent.category.LAUNCHER"/>
        </intent-filter>
    </activity>
    <activity
        android:name="com.facebook.CustomTabActivity"
        android:exported="true">
        <intent-filter>
            <action android:name="android.intent.action.VIEW" />
            <category android:name="android.intent.category.DEFAULT" />
            <category android:name="android.intent.category.BROWSABLE" />
            <data android:scheme="@string/fb_login_protocol_scheme" />
        </intent-filter>
    </activity>
</application>

iPhone Setup

Step 1

Set up a server-based redirect for Facebook's oauth to connect to, such as Firebase.

Step 2

Follow steps 1, 3, and 4 of the Facebook Login for iOS instructions, including:

• FB Step 1: Create or select a Facebook app to link
• FB Step 3a: Add your bundle identifier
• FB Step 3b: Enable Single Sign On (set to yes)
• FB Step 4: Configure your info.plist

Getting Started

For help getting started with Flutter, view our online documentation.

For help on editing plugin code, view the documentation.

Special thanks to:

• Brian Egan: https://github.com/brianegan/bansa (Helping out with wiring up the android code)