Question

我正在尝试在android中为我的sqlite数据库创建三个表，但这些表不会创建，只是数据库。使用查看DDMS，可以创建数据库，但是当我使用SQLite浏览器查看它时，不会仅创建任何表格。

我是这样做的：

private static final String DATABASE_NAME = "fgtDB";
private static final String DATABASE_TABLE = "profiles";
private static final String DATABASE_TABLE2 = "routines";
private static final String DATABASE_TABLE3 = "UserRoutines";
private static final int DATABASE_VERSION = 3;

private static final String DATABASE_CREATE =
    "create table if not exists profiles (_id integer primary key autoincrement, "
    + "firstname VARCHAR not null, age VARCHAR not null, " 
    + "heightft VARCHAR not null, heightin VARCHAR not null, weight VARCHAR not null, duration VARCHAR not null, bmi VARCHAR not null, weightclass VARCHAR not null,);";

private static final String DATABASE_CREATE2 =
        "create table if not exists routines (_id integer primary key autoincrement, "
        + "weightclass VARCHAR not null, musclegroup VARCHAR not null, " 
        + "exercise VARCHAR not null, numberofsets VARCHAR not null, numberofrepitition VARCHAR not null, day VARCHAR not null);";

private static final String DATABASE_CREATE3 =
        "create table if not exists UserRoutines (userid integer not null, "
        + "musclegroup VARCHAR not null, day VARCHAR not null" 
        + "exercise VARCHAR not null, numberofsetsleft VARCHAR not null, numeberofrepitition VARCHAR not null, isdone VARCHAR not null);";

private final Context context; 

private DatabaseHelper DBHelper;
private SQLiteDatabase db;

public DBAdapter(Context ctx) 
{
    this.context = ctx;
    DBHelper = new DatabaseHelper(context);
}

private static class DatabaseHelper extends SQLiteOpenHelper 
{
    DatabaseHelper(Context context) 
    {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
    }

    @Override
    public void onCreate(SQLiteDatabase db) 
    {
        try
        {
            db.execSQL(DATABASE_CREATE);
            db.execSQL(DATABASE_CREATE2);
            db.execSQL(DATABASE_CREATE3);
        }
        catch(SQLException e)
        {
            e.printStackTrace();
        }
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) 
    {
        Log.w(TAG, "Upgrading database from version " + oldVersion 
                + " to "
                + newVersion + ", which will destroy all old data");
        db.execSQL("DROP TABLE IF EXISTS profiles");
        onCreate(db);
    }
}

有什么想法吗？

Answer 1

你在DATABASE_CREATE结尾处有一个逗号，不应该在那里。

...  weightclass VARCHAR not null,);"

应该是

...   weightclass VARCHAR not null);"

在sqlite android中创建表

1 个答案: