android - 在android中执行sql

Question

我正在尝试在 sqlite android 开发中创建表。我的问题是，只创建了一张表，但没有创建另一张表。

这是我创建它们的方法。

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

变量:

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);";

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, numeberofrepitition VARCHAR not null, day VARCHAR not null);";

关于问题是什么的任何想法？谢谢!

更新:

private static final String DATABASE_NAME = "fgtDB";
private static final String DATABASE_TABLE = "profiles";
private static final String DATABASE_TABLE2 = "routines";
private static final int DATABASE_VERSION = 2;

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);
        }
        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);
    }
}    

Answer 1

可能是你先建了一张表，建库的时候又加了一张表。
如果是这种情况，请尝试更改数据库版本，因为如果版本相同，onCreate(SQLiteDatabase db) 方法只会调用一次。