Class File for a basic Android App. Repo: https://github.com/ajinasokan/smallest-android-app-from-scratch Read: https://apkchef.net/build-smallest-android-app/

MainActivity.java

package com.myapp;

import android.app.Activity;
import android.os.Bundle;

public class MainActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

    }

}