Android, manifest variables using C++ encryption (with NDK)

user_15881253 0
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I've just recently implemented NDK, and everything seems to work fine. Now.. I'm not sure on how to use the c++ method in the manifest, I managed to use it in some section of my code by creating an object which load the cpp library:

object ApiKeyRetriever {
    init{
        System.loadLibrary("api-keys")
    }
    external fun getGoogleKey():String
    external fun getFacebookToken():String
    external fun getDatabase():String
    external fun getFacebookProtocolScheme():String
}

But now, I need it in the manifest for the facebook meta-data

<meta-data
    android:name="com.facebook.sdk.ApplicationId"
    android:value="${fbLoginProtocolScheme}" />
<meta-data
    android:name="com.facebook.sdk.ClientToken"
    android:value="${facebookClientToken}" />

Currently I'm using these two variables that I have stored in (Android view) Gradle Scripts -> local.properties, which is the old way I used to store key, just to prevent them from being uploaded on github. (by using id 'com.google.android.libraries.mapsplatform.secrets-gradle-plugin').

kotlin android-studio android-ndk android manifest
1 Answers

I found out that with the newer Facebook SDK there no need anymore to specifically set meta-data in the manifest (we can just remove them) and that you can do it via code like this:

class LoginActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        FacebookSdk.setApplicationId(ApiKeyRetriever.getFacebookApplicationID())
        FacebookSdk.setClientToken(ApiKeyRetriever.getFacebookToken())
        FacebookSdk.sdkInitialize(applicationContext)
    }
    
}

Where FacebookApplicationID returns the AppID you can see from the Facebook DEV portal. And getFacebookToken is the facebook token.

these three methods must be called before any usage of the facebookLogin methods

user_158812530
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