Mercury-IM/app/src/main/java/org/mercury_im/messenger/MercuryImApplication.java

package org.mercury_im.messenger;

import android.app.Application;
import android.content.Intent;
import android.os.Build;

import org.mercury_im.messenger.di.component.AppComponent;
import org.mercury_im.messenger.di.component.DaggerAppComponent;
import org.mercury_im.messenger.di.module.AppModule;
import org.mercury_im.messenger.service.MercuryConnectionService;


public class MercuryImApplication extends Application {

    static {
        // Initialize Smack etc.
        // new MercuryConfiguration();
    }

    private static MercuryImApplication INSTANCE;
    private AppComponent appComponent;
    private ClientStateHandler clientStateHandler = new ClientStateHandler();

    public static MercuryImApplication getApplication() {
        return INSTANCE;
    }


    @Override
    public void onCreate() {
        super.onCreate();
        INSTANCE = this;
        appComponent = createAppComponent();

        registerActivityLifecycleCallbacks(clientStateHandler);
        Notifications.initializeNotificationChannels(this);

        startForegroundService();
    }

    /**
     * Create the Dependency Injection graph.
     */
    public AppComponent createAppComponent() {
        AppComponent appComponent = DaggerAppComponent.builder()
                .appModule(new AppModule(this))
                .build();

        appComponent.inject(this);

        return appComponent;
    }

    public AppComponent getAppComponent() {
        return appComponent;
    }

    private void startForegroundService() {
        Intent foregroundService = new Intent(getApplicationContext(), MercuryConnectionService.class);
        foregroundService.setAction(MercuryConnectionService.ACTION_START);
        if (Build.VERSION.SDK_INT < 26) {
            startService(foregroundService);
        } else {
            startForegroundService(foregroundService);
        }
    }
}