Step 1: Create content for your database.
We will use a separate object that provides the books, this way we keep our activity clean.package com.chicagoandroid.cit299.week7.bookshelf;
import com.chicagoandroid.cit299.week7.bookshelf.model.Book;
import java.util.ArrayList;
import java.util.List;
/**
* Created by uki on 10/16/14.
* This class creates fake list of books,
* however it could import them from an XML file
* or fetch them from the Internet API.
*/
public class MockBookBuilder {
/**
* This is a static method that returns a list of mock books.
*/
public static List<Book> createBooks() {
Book book;
List<Book> books = new ArrayList<Book>();
// Create a new "empty" book with no properties.
book = new Book();
book.setAuthor("Reto Meier");
book.setTitle("Professional Android 4 Application Development");
book.setIsbn("1118102274");
book.setLocation("");
books.add(book);
// Create a new "empty" book with no properties.
book = new Book();
book.setAuthor("Paul Deitel, at al.");
book.setTitle("Android for Programmers An App-Driven Approach");
book.setIsbn("0-13-357092-4");
book.setLocation("");
books.add(book);
return books;
}
}
Step 2: adjust Activity onCreate() to populate ListView
import com.cyberwalkabout.activity.v7.actionbar.listview.ListViewSwipeActivity;
/**
* This class extends https://github.com/UkiDLucas/ListViewSwipeActivity
*/
public class MainActivity extends ListViewSwipeActivity {
private final static String TAG = MainActivity.class.getSimpleName();
/**
* UI element that displays books found.
*/
ListView booksListView;
/**
* bookIndexCards will help us keep track where is each book in the ListView.
*/
Map<Integer, Integer> bookIndexCards = new HashMap<Integer, Integer>();
/**
* Wrapper around Book database operations.
*/
BookSqlHelper bookDatabase;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
booksListView = (ListView) findViewById(R.id.booksListView);
bookDatabase = new BookSqlHelper(this);
addNewBooksToDatabase();
}
@Override
protected void onResume() {
super.onResume();
displayAllDataBaseBooks();
}
Step: private void addNewBooksToDatabase() {
String tag = TAG + ".addNewBooksToDatabase()";
List<Book> fetchedBooks;
// We save all books, one-by-one to database.
for (Book book : MockBookBuilder.createBooks()) {
// Comparing Books by only Title is not the best idea, it may lead to unexpected results.
fetchedBooks = bookDatabase.fetch(book.getTitle());
if (fetchedBooks.size() > 0) {
Log.i(tag, "Found this book in the database, not adding!");
}
else {
Log.i(tag, "New book, adding: " + book.toString());
bookDatabase.save(book);
}
}
}
Step:
