Question

我几乎所有的东西都很好，并且检查了与db和光标相关的所有其他东西，我点击了一个活动按钮，下面的代码运行以从其他类的公共函数访问字符串：

DatabaseHandler dbfunc = new DatabaseHandler(getApplicationContext());
                    String deviceCODE = dbfunc.getUSERdetailsSTRING();
                    Log.i(TAG, deviceCODE);

以下是DB处理程序类中的公共函数：

public String getUSERdetailsSTRING(){
        HashMap<String,String> user = new HashMap<String,String>();
        String selectQuery = "SELECT  * FROM " + TABLE_LOGIN;

        SQLiteDatabase db = this.getReadableDatabase();
        Cursor cursor = db.rawQuery(selectQuery, null);
        // Move to first row
        cursor.moveToFirst();
        if(cursor.getCount() > 0){
            user.put("name", cursor.getString(1));
            user.put("email", cursor.getString(2));
            user.put("uid", cursor.getString(3));
            user.put("created_at", cursor.getString(4));
            user.put("Device Code", cursor.getString(5));
        }
        cursor.moveToFirst();
        String deviceCODE = user.get(KEY_UID);
        return deviceCODE;
    }

但它在logcat上显示以下错误：

08-16 22:06:24.840: E/AndroidRuntime(25923): FATAL EXCEPTION: main
08-16 22:06:24.840: E/AndroidRuntime(25923): java.lang.IllegalStateException: Couldn't read row 0, col 5 from CursorWindow.  Make sure the Cursor is initialized correctly before accessing data from it.
08-16 22:06:24.840: E/AndroidRuntime(25923):    at android.database.CursorWindow.nativeGetString(Native Method)
08-16 22:06:24.840: E/AndroidRuntime(25923):    at android.database.CursorWindow.getString(CursorWindow.java:438)
08-16 22:06:24.840: E/AndroidRuntime(25923):    at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:51)

Answer 1

我从那里拿到示例（http://www.androidhive.info/2011/11/android-sqlite-database-tutorial/）的那个人从cursor.getString（1）开始计数的地方;从ONE然而它应该以零'0'开始，现在解决了！

尽管已初始化，但未初始化游标DB

1 个答案: