How to make inserts in table creation in SQLite?

I would like to know how to do INSERT manuals in the DatabaseHelper class that extends SQLiteOpenHelper.

public class DatabaseHelper extends SQLiteOpenHelper {

private static final String BANCO_DADOS = "Agenda";
private static int VERSAO = 1;


public DatabaseHelper(Context context) {
    super(context, BANCO_DADOS, null, VERSAO);
}

@Override
public void onCreate(SQLiteDatabase db) {

    db.execSQL( "CREATE TABLE amigo (_id INTEGER PRIMARY KEY," +
                " nome TEXT, telefone TEXT, " +
                " email TEXT, categoria INTEGER);"
    );
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

}

}

What I wanted was to do INSERTs within the onCreate method of the DatabaseHelper class just as the table was created, but I do not know how to do it.