Code snippet for app launch optimization

BaseFragment.java

public class BaseFragment extends Fragment {
  
    @Override
    public void onResume() {
        super.onResume();
        MyApplication.get().setAppIsReady(true);
    }    
  
}

MyApplication.java

/**
 * Time consuming tasks in global initialization should be run later so it doesn't block
 * first render of our Activity
 */
public class MyApplication extends Application {

    public static MyApplication instance;
    private volatile boolean appIsReady = false;
    private volatile boolean once = false;
    private volatile List<Runnable> onReadyRunnable = new ArrayList<>();

    public static MyApplication get() {
        return instance;
    }

    @Override
    protected void attachBaseContext(Context base) {
        super.attachBaseContext(base);

        try {
            MultiDex.install(this);
        } catch (RuntimeException ignored) {

        }
    }
  
    public void onCreate() {
        super.onCreate();
        instance = this;
        delayAfterAppsReady(() -> {
            FacebookSdk.sdkInitialize(getApplicationContext());
            // you can add more tasks to be delayed here
        });
    }

    public synchronized void delayAfterAppsReady(Runnable runnable) {
        if (appIsReady) {
            AndroidUtils.runOnBg(runnable);
        } else {
            onReadyRunnable.add(runnable);
        }
    }

    public synchronized void setAppIsReady(boolean appIsReady) {
        if (once) return;

        if (appIsReady && onReadyRunnable != null) {
            once = true;
            AndroidUtils.runOnBg(() -> {
                this.appIsReady = appIsReady;
                final List<Runnable> runnables = new ArrayList<>(onReadyRunnable);
                onReadyRunnable = null;

                for (Runnable run : runnables) {
                    run.run();
                }
            });
        }
    }
    
}

MyFragment.java

public class MyFragment extends BaseFragment {
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        MyApplication.get().delayAfterAppsReady(() -> {
            // another additional tasks to be run after app is ready
        });
    }
    
}