Question

Hi,

I want to create a sqlite database for use in an Android application to store data for offline use. When there is no internet connectivity my application will show some data from this sqlite DB. Any pointers, where I should begin with?

Thank you

Answer 1

public class DatabaseHelper extends SQLiteOpenHelper  {
    public DatabaseHelper(Context context) {
        super(context, "DATABASE_NAME", null, 1);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL("CREATE TABLE yourTable ("
                + "id INTEGER PRIMARY KEY, "
                + "name TEXT NOT NULL);");
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int o, int arg2) {
        db.execSQL("DROP TABLE IF EXISTS yourTable");
        onCreate(db);
    }

    public void insertMethod(String name) {
        SQLiteDatabase db = getWritableDatabase();
        String insertQuery = "INSERT INTO yourTable (name) VALUES(?)";
        SQLiteStatement stmt = db.compileStatement(insertQuery);
        stmt.bindString(1, name);
        stmt.execute();
        stmt.close();
        db.close();
    }

    public String getMethod() {
        String name;
        SQLiteDatabase db = getReadableDatabase();
        String selectQuery = "SELECT name FROM yourTable LIMIT 1";
        Cursor cur = db.rawQuery(selectQuery, null);
        cur.moveToFirst();

        if(cur.isAfterLast() == false)
            name= cur.getString(0);

        cur.close();
        db.close();
        return name;
    }

}