如您所見，我想創建一個外部類作為我的活動和我的數據庫之間的適配器，以使其更安全 nut 它只是拒絕使用來自內部類的值，我試圖導入這些值但它導入它們沒有意義，我試圖隱藏它們你能解決這個問題還是給我另一種方法來讓我的代碼工作public class DataBaseConnection { DataBase DataBase; public DataBaseConnection(Context context) { DataBase = new DataBase(context); public void dataInsert (String classnumber , String studentsnumber) { SQLiteDatabase sqLiteDatabase = dataBase.getWritableDatabase(); ContentValues contentValues = new ContentValues(); contentValues.put(DataBase.classname); contentValues.put(DataBase.studentsnumber); } } class DataBase extends SQLiteOpenHelper { private static final String database_name = "DB"; private static final int database_vesion =1; private static final String UID = "id"; private static final String name = "Name"; private static final String work_mark = "Works Mark"; private static final String test_mark = "Tests mark"; private static final String tableName = "Students"; private static final String classname = "Class name"; private static final String studentsnumber = "Students number"; private Context context; private static final String tablename1 = "Class"; private static final String CREATE_TABLE1 = "CREATE TABLE " +tablename1+" " + " ("+UID+" INTEGER PRIMARY KEY AUTOINCREMENT," + " "+classname+" TEXT VARCHAR(255))," + " "+studentsnumber+" INTEGER ;"; }
1 回答
SMILET
TA貢獻1796條經驗 獲得超4個贊
您有幾個問題，您在函數中放置了一個函數，這是無效的語法 - 它與類變量可見性無關。也不確定這種方法如何更安全，因為您的數據庫變量是包范圍的。要解決您的直接問題，您需要這樣的東西：
public class DataBaseConnection {
private final DataBase dataBase;
public DataBaseConnection(Context context) {
dataBase = new DataBase(context);
}
public void dataInsert (String classnumber , String studentsnumber) {
SQLiteDatabase sqLiteDatabase = dataBase.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(DataBase.classname, classnumber);
contentValues.put(DataBase.studentsnumber, studentsnumber);
sqLiteDatabase.insert( // insert here )
}
.. Rest of class
}
添加回答
舉報
0/150
提交
取消