Question

I’m trying to create a table for an SQlite database on android. The table has 5 columns, Int id, URL link, String title, String description, and Date date.

To build my code I’ve been using this and this as reference but neither show how to add anything but a String to the cursor.

Heres my code:

public class Chapter {

final SimpleDateFormat FORMATTER = 
        new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss Z");
    private String title;
    private URL link;
    private String description;
    private Date date;
    private int id;

    //Constructor for table includes ID.
    public Chapter(int id, URL link, String title, String description, Date date) {
        this.id = id;
        this.link = link;
        this.title = title;
        this.description = description;
        this.date = date;
    }

    //Empty Constructor
    public Chapter() {
        // TODO Auto-generated constructor stub
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title.trim();
    }
    // getters and setters omitted for brevity 
    public URL getLink() {
        return link;
    }

    public void setLink(String link) {
        try {
            this.link = new URL(link);
        } catch (MalformedURLException e) {
            throw new RuntimeException(e);
        }
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description.trim();
    }

    public String getDate() {
        return FORMATTER.format(this.date);
    }

    public void setDate(String date) {
        // pad the date if necessary
        while (!date.endsWith("00")){
            date += "0";
        }
        date = "";
        try {
            this.date = FORMATTER.parse(date.trim());
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
    }

    public Chapter copy(){
        Chapter copy = new Chapter();
        copy.title = title;
        copy.link = link;
        copy.description = description;
        copy.date = date;
        return copy;
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("Title: ");
        sb.append(title);
        sb.append('\n');
        sb.append("Date: ");
        sb.append(this.getDate());
        sb.append('\n');
        sb.append("Link: ");
        sb.append(link);
        sb.append('\n');
        sb.append("Description: ");
        sb.append(description);
        return sb.toString();
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((date == null) ? 0 : date.hashCode());
        result = prime * result
                + ((description == null) ? 0 : description.hashCode());
        result = prime * result + ((link == null) ? 0 : link.hashCode());
        result = prime * result + ((title == null) ? 0 : title.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        Chapter other = (Chapter) obj;
        if (date == null) {
            if (other.date != null)
                return false;
        } else if (!date.equals(other.date))
            return false;
        if (description == null) {
            if (other.description != null)
                return false;
        } else if (!description.equals(other.description))
            return false;
        if (link == null) {
            if (other.link != null)
                return false;
        } else if (!link.equals(other.link))
            return false;
        if (title == null) {
            if (other.title != null)
                return false;
        } else if (!title.equals(other.title))
            return false;
        return true;
    }

    public int compareTo(Chapter another) {
        if (another == null) return 1;
        // sort descending, most recent first
        return another.date.compareTo(date);
    }

    public int getId() {
        // TODO Auto-generated method stub
        return id;
    }

    public void setId(int parseInt) {
        // TODO Auto-generated method stub
        this.id = id;
    }

    public void setImage(String string) {
        // TODO Auto-generated method stub

    }

and my helper class:

public class ChapterSQLiteOpenHelper extends SQLiteOpenHelper {

private static final String DATABASE_NAME = "chaptertable";
  private static final int DATABASE_VERSION = 1;

  // Database table
  public static final String TABLE_CHAPTER = "Chapter";
  public static final String COLUMN_ID = "_id";
  public static final String COLUMN_LINK = "link";
  public static final String COLUMN_TITLE = "title";
  public static final String COLUMN_DESCRIPTION = "description";
  public static final String COLUMN_PUBDATE = "pubdate";
  public static final String COLUMN_IMAGEID = "imageid";

  // Database creation SQL statement
  private static final String DATABASE_CREATE = "create table " 
      + TABLE_CHAPTER
      + "(" 
      + COLUMN_ID + " integer primary key autoincrement, " 
      + COLUMN_LINK + " text not null, " 
      + COLUMN_TITLE + " text not null," 
      + COLUMN_DESCRIPTION + " text not null" 
      + COLUMN_PUBDATE + " text not null," 
      + COLUMN_IMAGEID + " text not null," 
      + ");";



  public ChapterSQLiteOpenHelper(Context context) {
    super(context, DATABASE_NAME, null, DATABASE_VERSION);
  }

  // Method is called during creation of the database
  @Override
  public void onCreate(SQLiteDatabase database) {
        database.execSQL(DATABASE_CREATE);
      }

  // Method is called during an upgrade of the database,
  // e.g. if you increase the database version
  // Upgrading database
    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        // Drop older table if existed
        db.execSQL("DROP TABLE IF EXISTS " + TABLE_CHAPTER);

        // Create tables again
        onCreate(db);
    }


  /**
     * All CRUD(Create, Read, Update, Delete) Operations
     */

    // Adding new contact
    void addContact(Chapter chapter) {
        SQLiteDatabase db = this.getWritableDatabase();

        ContentValues values = new ContentValues();
        values.put(COLUMN_ID, chapter.getId()); // Chapter ID
        values.put(COLUMN_LINK, chapter.getLink()); // Chapter Link
        values.put(COLUMN_TITLE, chapter.getTitle()); // Chapter Title
        values.put(COLUMN_DESCRIPTION, chapter.getDescription()); // Chapter Description
        values.put(COLUMN_PUBDATE, chapter.getDate()); // Chapter Date
        //values.put(COLUMN_IMAGEID, chapter.getImage()); // Chapter Image

        // Inserting Row
        db.insert(TABLE_CHAPTER, null, values);
        db.close(); // Closing database connection
    }

    // Getting single contact
    Chapter getChapter(int id) {
        SQLiteDatabase db = this.getReadableDatabase();

        Cursor cursor = db.query(TABLE_CHAPTER, new String[] { COLUMN_ID,
                COLUMN_ID, COLUMN_LINK }, COLUMN_ID + "=?",
                new String[] { String.valueOf(id) }, null, null, null, null);
        if (cursor != null)
            cursor.moveToFirst();

        Chapter chapter = new Chapter(Integer.parseInt(cursor.getString(0)), cursor.getURL(1), cursor.getString(2), cursor.getString(3), cursor.getString(4));
        // return contact
        return chapter;
    }

    // Getting All Contacts
    public List<Chapter> getAllContacts() {
        List<Chapter> chapterList = new ArrayList<Chapter>();
        // Select All Query
        String selectQuery = "SELECT  * FROM " + TABLE_CHAPTER;

        SQLiteDatabase db = this.getWritableDatabase();
        Cursor cursor = db.rawQuery(selectQuery, null);

        // looping through all rows and adding to list
        if (cursor.moveToFirst()) {
            do {
                Chapter chapter = new Chapter();
                chapter.setId(Integer.parseInt(cursor.getString(0)));
                chapter.setLink(cursor.getURL(1));
                chapter.setTitle(cursor.getString(2));
                chapter.setDescription(cursor.getString(3));
                chapter.setDate(cursor.getString(4));
                //chapter.setImage(cursor.getString(5));
                // Adding chapter to list
                chapterList.add(chapter);
            } while (cursor.moveToNext());
        }

        // return contact list
        return chapterList;
    }

    // Updating single contact
    public int updateContact(Chapter chapter) {
        SQLiteDatabase db = this.getWritableDatabase();

        ContentValues values = new ContentValues();
        values.put(COLUMN_ID, chapter.getId());
        values.put(COLUMN_LINK, chapter.getLink());
        values.put(COLUMN_TITLE, chapter.getTitle());
        values.put(COLUMN_DESCRIPTION, chapter.getDescription());
        values.put(COLUMN_PUBDATE, chapter.getDate());
        //values.put(COLUMN_IMAGEID, chapter.getImage());

        // updating row
        return db.update(TABLE_CHAPTER, values, COLUMN_ID + " = ?",
                new String[] { String.valueOf(chapter.getId()) });
    }

    // Deleting single contact
    public void deleteContact(Chapter chapter) {
        SQLiteDatabase db = this.getWritableDatabase();
        db.delete(TABLE_CHAPTER, COLUMN_ID + " = ?",
                new String[] { String.valueOf(chapter.getId()) });
        db.close();
    }

    // Getting contacts Count
    public int getChaptersCount() {
        String countQuery = "SELECT  * FROM " + TABLE_CHAPTER;
        SQLiteDatabase db = this.getReadableDatabase();
        Cursor cursor = db.rawQuery(countQuery, null);
        cursor.close();

        // return count
        return cursor.getCount();
    }

I get compile errors on the values.put line for link, and the Chapter chapter = new Chapter… line.

Answer 1

You need to set properties using setter methods in copy() method like :

public Chapter copy(){
    Chapter copy = new Chapter();
    copy.setTitle(this.title);
    copy.setLink(this.link);
    copy.setDescription(this.description);
    copy.setDate(this.date);
    return copy;
}