SQL Lite db 조작을 처음 사용합니다. SQL Lite db에서 데이터 조작
내가이 튜토리얼 SQL Lite tutorialpublic class DatabaseHandler extends SQLiteOpenHelper {
// All Static variables
// Database Version
private static final int DATABASE_VERSION = 1;
// Database Name
private static final String DATABASE_NAME = "PersonalAssistant";
// TASKS table name
private static final String TABLE_TASKS = "TASKS";
// Tasks Table Columns names
private static final String KEY_ID = "id";
private static final String UUID = "uuid";
private static final String ACTION = "action";
private static final String TIME = "time";
private static final String DAY = "day";
private static final String RECEPIENTS = "receipients";
private static final String BODY = "body";
private static final String SUBJECT = "subject";
private static final String STATUS = "status";
public DatabaseHandler(Context context)
{
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
// Creating Tables
@Override
public void onCreate(SQLiteDatabase db) {
String CREATE_CONTACTS_TABLE = "CREATE TABLE IF NOT EXISTS " + TABLE_TASKS + "("
+ KEY_ID + " INTEGER PRIMARY KEY autoincrement," +UUID + " TEXT,"+ ACTION + " TEXT,"
+ TIME + " TEXT," + DAY + " TEXT," + RECEPIENTS+ " TEXT," +BODY + " TEXT," + " TEXT," +SUBJECT + " TEXT," +SUBJECT + " TEXT," +")";
db.execSQL(CREATE_CONTACTS_TABLE);
}
// Upgrading database
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// Drop older table if existed
db.execSQL("DROP TABLE IF EXISTS " + TABLE_TASKS);
// Create tables again
onCreate(db);
}
// add task to table
public void addTask(Task task)
{
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(ACTION, task.getAction());
values.put(UUID, task.getUuid());
values.put(TIME, task.getTime());
values.put(DAY, task.getDay());
values.put(RECEPIENTS, task.getReceipients());
values.put(BODY, task.getBody());
values.put(SUBJECT, task.getSubject());
values.put(STATUS, task.getStatus());
// Inserting Row
db.insert(TABLE_TASKS, null, values);
db.close(); // Closing database connection
} .............
에서 DB 처리 클래스를 쓴 내 질문에 내가 내 응용 프로그램 활동에서 DB 조작이 클래스를 어떻게 부릅니까입니까?
SQLiteOpenHelper를 확장하지 않는 다른 활동에서 내 수업을 어떻게 instatiate합니까?
클래스 및 메서드를 정적으로 정의 할 수 있지만 좋은 방법입니까?