Example of instantiating custom asynchronous task to make network calls

MainActivity.java

public class MainActivity extends AppCompatActivity {        
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);

            //Instantiate Async task
            MyAsync myTask = new MyAsync(this);
            
            //Run the task in an asynchronous way
            myTask.execute("https://api.callhub.io/v2/conference/");
        }
}