lnreader/android/app/src/main/java/com/rajarsheechatterjee/LNReader/MainActivity.java

package com.rajarsheechatterjee.LNReader;

import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;

import expo.modules.ReactActivityDelegateWrapper;
import com.facebook.react.ReactActivity;
import com.facebook.react.ReactActivityDelegate;
import com.facebook.react.ReactRootView;
import com.rajarsheechatterjee.VolumeButtonListener.VolumeButtonListener;

import org.devio.rn.splashscreen.SplashScreen;

public class MainActivity extends ReactActivity {
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
            WindowManager.LayoutParams layoutParams = new WindowManager.LayoutParams();
            layoutParams.layoutInDisplayCutoutMode = WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES;
            getWindow().setAttributes(layoutParams);
        }

        Window w = getWindow();
        w.setStatusBarColor(Color.TRANSPARENT);
        w.setNavigationBarColor(Color.TRANSPARENT);
        w.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
        super.onCreate(null);
        SplashScreen.show(this,R.style.SplashScreenTheme, R.id.lottie);
        SplashScreen.setAnimationFinished(true);
    }

    @Override
    public boolean dispatchKeyEvent(KeyEvent event) {
        if (VolumeButtonListener.isActive()) {

            int action = event.getAction();
            int keyCode = event.getKeyCode();
            switch (keyCode) {
                case KeyEvent.KEYCODE_VOLUME_UP:
                    if (action == KeyEvent.ACTION_DOWN) {
                        // volup
                        VolumeButtonListener.up();
                        if (!VolumeButtonListener.prevent)
                            return super.dispatchKeyEvent(event);
                    }
                    return true;
                case KeyEvent.KEYCODE_VOLUME_DOWN:
                    if (action == KeyEvent.ACTION_DOWN) {
                        // voldown
                        VolumeButtonListener.down();
                        if (!VolumeButtonListener.prevent)
                            return super.dispatchKeyEvent(event);
                    }
                    return true;
                default:
                    return super.dispatchKeyEvent(event);
            }
        }
        return super.dispatchKeyEvent(event);
    }

    /**
     * Returns the name of the main component registered from JavaScript.
     * This is used to schedule rendering of the component.
     */
    @Override
    protected String getMainComponentName() {
        return "main";
    }

    @Override
    protected ReactActivityDelegate createReactActivityDelegate() {
        return new ReactActivityDelegateWrapper(this, BuildConfig.IS_NEW_ARCHITECTURE_ENABLED,  
            new MainActivityDelegate(this, getMainComponentName()
        ));
    }

    public static class MainActivityDelegate extends ReactActivityDelegate {
        public MainActivityDelegate(ReactActivity activity, String mainComponentName) {
            super(activity, mainComponentName);
        }

        @Override
        protected ReactRootView createRootView() {
            ReactRootView reactRootView = new ReactRootView(getContext());
            // If you opted-in for the New Architecture, we enable the Fabric Renderer.
            reactRootView.setIsFabric(BuildConfig.IS_NEW_ARCHITECTURE_ENABLED);
            return reactRootView;
        }

        @Override
        protected boolean isConcurrentRootEnabled() {
            // If you opted-in for the New Architecture, we enable Concurrent Root (i.e. React 18).
            // More on this on https://reactjs.org/blog/2022/03/29/react-v18.html
            return BuildConfig.IS_NEW_ARCHITECTURE_ENABLED;
        }
    }
}