public void addBookClicked(View view) throws IOException {
// EditText et =(EditText)findViewById(R.id.bookName);
Book newBook = new Book();
newBook.setBookName(((EditText) findViewById(R.id.editBookName)).getText().toString());
newBook.set_price(
Integer.parseInt(((EditText) findViewById(R.id.editBookPrice)).getText().toString()));
final Backend backend = BackendFactory.getInstance(this);
backend.addBook(newBook);
super.onBackPressed();
}