public List<Participant> getAllParticipants() {
List<Participant> participants = new LinkedList<Participant>();
// 1. build the query
String query = "SELECT * FROM " + TABLE_PARTICIPANT;
// 2. get reference to writable DB
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(query, null);
// 3. go over each row, build participant and add it to list Participant participant = null;
if (cursor.moveToFirst()) {
do {
Participant participant = new Participant();
participant.setId(Integer.parseInt(cursor.getString(0)));
participant.setNom(cursor.getString(1));
participant.setPrenom(cursor.getString(2));
// Add participant to participants
participants.add(participant);
} while (cursor.moveToNext());
}
// return participants
return participants;
}
public Participant getParticipant(int id) {
// 1. get reference to readable DB
SQLiteDatabase db = this.getReadableDatabase();
// 2. build query
Cursor cursor =
db.query(
TABLE_PARTICIPANT,
COLUMNS,
PARTICIPANT_ID + " = ?",
new String[] {String.valueOf(id)},
null,
null,
null,
null);
// 3. if we got results get the first one if (cursor != null)
cursor.moveToFirst();
// 4. build Participant object
Participant p = new Participant();
p.setId(Integer.parseInt(cursor.getString(0)));
p.setNom(cursor.getString(1));
p.setPrenom(cursor.getString(2));
// 5. return Participant
return p;
}
public int updateParticipant(Participant participant) {
// 1. get reference to writable DB
SQLiteDatabase db = this.getWritableDatabase();
// 2. create ContentValues to add key "column"/value
ContentValues values = new ContentValues();
// get nom
values.put(PARTICIPANT_NOM, participant.getNom());
// get prenom
values.put(PARTICIPANT_PRENOM, participant.getPrenom());
// 3. updating row
int i =
db.update(
TABLE_PARTICIPANT,
values,
PARTICIPANT_ID + " = ?",
new String[] {String.valueOf(participant.getId())});
// 4. close
db.close();
return i;
}
public void addParticipant(Participant p) {
// 1- get reference to writable DB
SQLiteDatabase db = this.getWritableDatabase();
// 2. create ContentValues to add key "column"/value
ContentValues values = new ContentValues();
// Preparation des valeurs a inserer
values.put(PARTICIPANT_NOM, p.getNom());
values.put(PARTICIPANT_PRENOM, p.getPrenom());
// 3. insertion dans la base de donnees
db.insert(
TABLE_PARTICIPANT,
null,
values); // key/value -> keys = column names/ values = column values
// 4. close
db.close();
}
public void delateParticipant(Participant p) {
// 1. get reference to writable DB
SQLiteDatabase db = this.getWritableDatabase();
// 2. delete
db.delete(TABLE_PARTICIPANT, PARTICIPANT_ID + " = ?", new String[] {String.valueOf(p.getId())});
// 3. close
db.close();
}