SQLite的Android工作室，更新值

Question

即時woriaking瑣事遊戲，我需要爲每個正確的問題，用戶回答得分++，我怎麼能在SQLITe中做到這一點？ 這是我的DBHELPER。
我想給用戶名添加1來得到他的用戶名，任何人都可以幫助我嗎？

private static final String DATABASE_NAME = "ScoreUsers.db"; 

public DBHelper(Context context) { 
    super(context, DATABASE_NAME, null, DATABASE_VERSION); 
} 

@Override 
public void onCreate(SQLiteDatabase db) { 
    //All necessary tables you like to create will create here 

    String CREATE_TABLE_STUDENT = "CREATE TABLE IF NOT EXISTS " + User.TABLE + "(" 
      + User.KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT ," 
      + User.KEY_name + " TEXT, " 
      + User.KEY_score + " INTEGER, " 
      + User.KEY_pass + " TEXT)"; 

    db.execSQL(CREATE_TABLE_STUDENT); 

} 

@Override 
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
    db.execSQL("DROP TABLE IF EXISTS " + User.TABLE); 

    onCreate(db); 

} 

public int insert(User user) { 

    //Open connection to write data 
    SQLiteDatabase db = this.getWritableDatabase(); 
    ContentValues values = new ContentValues(); 
    values.put(User.KEY_ID, user.ID); 
    values.put(User.KEY_pass,user.Password); 
    values.put(User.KEY_name, user.name); 
    values.put(User.KEY_score,user.score); 

    // Inserting Row 
    long student_Id = db.insert(User.TABLE, null, values); 
    db.close(); // Closing database connection 
    return (int) student_Id; 
} 

/*public boolean updateScore(String name) 
{ 
    SQLiteDatabase db = this.getWritableDatabase(); 
    ContentValues values = new ContentValues(); 
    values.put(User.KEY_ID, user.ID); 
    values.put(User.KEY_pass,user.Password); 
    values.put(User.KEY_name, user.name); 
    values.put(User.KEY_score,user.score); 

    db.update(User.TABLE,values,User.KEY_name + "=?",new String[]{username}); 
    db.close(); 
    return true; 
}*/ 


public User getUserById(int Id){ 
    SQLiteDatabase db = this.getReadableDatabase(); 
    String selectQuery = "SELECT " + 
      User.KEY_ID + "," + 
      User.KEY_name + "," + 
      User.KEY_pass + 
      " FROM " + User.TABLE 
      + " WHERE " + 
      User.KEY_ID + "=?";// It's a good practice to use parameter ?, instead of concatenate string;// It's a good practice to use parameter ?, instead of concatenate string 

    //int iCount =0; 
    User user = new User(); 

    Cursor cursor = db.rawQuery(selectQuery, new String[] { String.valueOf(Id) }); 

    if (cursor.moveToFirst()) { 
     do { 
      user.ID =cursor.getInt(cursor.getColumnIndex(User.KEY_ID)); 
      user.name =cursor.getString(cursor.getColumnIndex(User.KEY_name)); 
      user.Password =cursor.getString(cursor.getColumnIndex(User.KEY_pass)); 

     } while (cursor.moveToNext()); 
    } 

    cursor.close(); 
    db.close(); 
    return user; 
} 

public boolean loginByUserName(User user) 
{ 
    String pass=""; 
    SQLiteDatabase db = this.getReadableDatabase(); 
    String selectQuery = "SELECT " + 
      User.KEY_name + "," + 
      User.KEY_pass + 
      " FROM " + User.TABLE 
      + " WHERE " + 
      User.KEY_name + "=?"; 

    Cursor cursor = db.rawQuery(selectQuery, new String[] { String.valueOf(user.name) }); 

    if (cursor.moveToFirst()) { 
     do { 
      pass =cursor.getString(cursor.getColumnIndex(User.KEY_pass)); 
     } while (cursor.moveToNext()); 
    } 
    if(pass.equals(user.Password)) return true; 
    return false; 
} 


public ArrayList<String> getUserList() { 
    //Open connection to read only 
    SQLiteDatabase db = this.getReadableDatabase(); 
    String selectQuery = "SELECT " + 
      User.KEY_name + "," + 
      User.KEY_pass + "," + 
      User.KEY_score + 
      " FROM " + User.TABLE; 

    //Student student = new Student(); 
    ArrayList<String> userList1 = new ArrayList<String>(); 

    Cursor cursor = db.rawQuery(selectQuery, null); 
    // looping through all rows and adding to list 

    if (cursor.moveToFirst()) { 
     do { 

      userList1.add(cursor.getString(cursor.getColumnIndex(User.KEY_name)) +" "+ cursor.getString(cursor.getColumnIndex(User.KEY_pass))+" "+cursor.getString(cursor.getColumnIndex(User.KEY_score))); 


     } while (cursor.moveToNext()); 
    } 

    cursor.close(); 
    db.close(); 
    return userList1; 

} 

public void deleteByID(int ID) { 

    SQLiteDatabase db = this.getWritableDatabase(); 
    // It's a good practice to use parameter ?, instead of concatenate string 
    db.delete(User.TABLE, User.KEY_ID + "= ?", new String[] { String.valueOf(ID) }); 
    db.close(); // Closing database connection 
} 

public void deleteByName(String name) { 

    SQLiteDatabase db = this.getWritableDatabase(); 
    // It's a good practice to use parameter ?, instead of concatenate string 
    db.delete(User.TABLE, User.KEY_name + "= ?", new String[] { String.valueOf(name) }); 
    db.close(); // Closing database connection 
} 

public void clearTable() { 
    SQLiteDatabase db = this.getWritableDatabase(); 
} 
} 

Answer 1

您可以使用從SQLite dbHelper更新。

試試這個命令

UPDATE User.TABLE SET User.KEY_score= User.KEY_score + 1 WHERE User.KEY_ID = {enter the one you want to update score for}