Remote Config solution for LadyM (License: https://gist.github.com/liorkup/019cec4f23edfe39a444571206ea2ae7)

MainActivity.Java

//Remote Config Solution
public class MainActivity extends AppCompatActivity {

    // Remote Config Parameter Key
    public static Map<String, String> RC_KEY_TO_EVENT_MAP;
    static {
        RC_KEY_TO_EVENT_MAP = new HashMap<>();
        RC_KEY_TO_EVENT_MAP.put("rc_retention", "p_retention");
        RC_KEY_TO_EVENT_MAP.put("rc_complete_level_3", "p_complete_level_3");
        RC_KEY_TO_EVENT_MAP.put("rc_complete_level_5", "p_complete_level_5");
        RC_KEY_TO_EVENT_MAP.put("rc_complete_level_10", "p_complete_level_10");
    }
    private FirebaseAnalytics mFirebaseAnalytics;
    private FirebaseRemoteConfig mFirebaseRemoteConfig;

    private static final String TAG = MainActivity.class.getName();
    

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        RecyclerView newArrivalView = findViewById(R.id.new_arrivals_view);
        renderProducts(NEW_ARRIVAL, newArrivalView);
        RecyclerView recommendView = findViewById(R.id.recommendation_view);
        renderProducts(RECOMMENDATION, recommendView);
        mFirebaseAnalytics = FirebaseAnalytics.getInstance(this);
        mFirebaseRemoteConfig = FirebaseRemoteConfig.getInstance();
        mFirebaseRemoteConfig.setDefaultsAsync(R.xml.remote_config_defaults);

       // [START fetch_config_with_callback]
        mFirebaseRemoteConfig.fetchAndActivate()
                .addOnCompleteListener(this, task -> {
                    if (task.isSuccessful()) {
                        boolean updated = task.getResult();
                        Log.d(TAG, "Config params updated: " + updated);
                        Toast.makeText(MainActivity.this, "Fetch and activate succeeded",
                                Toast.LENGTH_SHORT).show();

                    } else {
                        Toast.makeText(MainActivity.this, "Fetch failed",
                                Toast.LENGTH_SHORT).show();
                    }

                    for(Map.Entry<String, String> entry : RC_KEY_TO_EVENT_MAP.entrySet()) {
                        boolean rcValue = mFirebaseRemoteConfig.getBoolean(entry.getKey());
                        Log.d(TAG, "Remote Config key: " + entry.getKey() + "; value: " + rcValue);
                        if(rcValue) {                    
                            mFirebaseAnalytics.logEvent(entry.getValue(), new Bundle());
                        }
                    }

                });
    }
}

remote_config_defaults.xml

<?xml version="1.0" encoding="utf-8"?>
<defaultsMap>
    <entry>
        <key>rc_retention</key>
        <value>false</value>
    </entry>
    <entry>
        <key>rc_complete_level_3</key>
        <value>false</value>
    </entry>
    <entry>
        <key>rc_complete_level_5</key>
        <value>false</value>
    </entry>
    <entry>
        <key>rc_complete_level_10</key>
        <value>false</value>
    </entry>

</defaultsMap>