Adding an Application Class to Your Android Application

import android.app.Application;
​
     
public class MainApplication extends Application {
​
    private static MainApplication instance;
    private static MarsClient marsClient;
    private static final String writeKey = "API-KEY";
    
    @Override
    public void onCreate() {
        super.onCreate();
        
        // initialize Mars SDK Here
        marsClient = MarsClient.getInstance(
                this,
                "MARS_SDK_API_KEY",
                new MarsConfig.Builder()
                        .withLogLevel(MarsLogger.MarsLogLevel.DEBUG)
                        .withTrackLifecycleEvents(true)
                        .withRecordScreenViews(true)
                        .build()
        );
        
         instance = this;
​
​
        MarsClient.with(this).onIntegrationReady(writeKey, new MarsClient.Callback() {
            @Override
            public void onReady(Object instance) {
                Log.i("Status", "Mars Integration is ready");
            }
        });
​
​
        MarsClient.setSingletonInstance(marsClient);
​
    }
    
    public static MarsClient getMarsClient() {
        return marsClient;
    }
​
    public static MainApplication getInstance() {
        return instance;
    }
}