Where can I find my MainActivity.java when running a Android simulator - react-native

Question

I just mad my first React native project and I'm trying to lock my screen orientation to landscape. I installed this package
https://github.com/yamill/react-native-orientation#configuration
with npm install react-native link react-native-orientation and now I need to
Implement onConfigurationChanged method in MainActivity.java
So this code
import android.content.Intent; // <--- import
import android.content.res.Configuration; // <--- import
public class MainActivity extends ReactActivity {
......
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
Intent intent = new Intent("onConfigurationChanged");
intent.putExtra("newConfig", newConfig);
this.sendBroadcast(intent);
}
......
}
But where can I find that? From what I've seen is that you can find it in a android studio project. But I don't have a project, I just go to the AVD manager to run my virtual device. So where am I supposed to add this code?

Answer 1

The whole aim of expo is to handle everything related to android or ios for you.
Thus, you won't have access to these two folders unless you eject your app from expo as it's explained here on the official doc.
However, if your goal is to handle screen orientation, expo has a built-in API for you that you may find here.
Or even simpler, you could just update your app.json and add this line:
"expo": {
...
"orientation": "landscape"
...
}
Have a look at the official doc if you want to see everything that you can handle with this configuration file.