Question

不知何故，代码不会插入数据。即使我将数据硬编码到内容值中。

public void addEvent(String username, String itemName, String price, String imageId, String eventType) {

        SQLiteDatabase db = this.getWritableDatabase();

            ContentValues values = new ContentValues();
            values.put(EVENT_USERNAME, username);
            values.put(EVENT_ITEM_NAME, itemName);
            values.put(EVENT_ITEM_PRICE, price);
            values.put(EVENT_ITEM_IMAGE, imageId);
            values.put(EVENT_EVENT_TYPE, eventType);

            long result;
            result = db.insert(TABLE_EVENT, null, values);

            Toast.makeText(context, "RESULT = " + result, Toast.LENGTH_SHORT).show();

        db.close();
    }

结果总是返回-1。

它不是来自我的数据源，因为我已经将它分别烘烤了，甚至硬编码只是为了检查它仍然没有。

继承人我的定义

    //table name
private static final String TABLE_USERS = "table_users";
private static final String TABLE_EVENT = "table_event"
//table_event columns
private static final String EVENT_ID = "id";
private static final String EVENT_USERNAME = "username";
private static final String EVENT_ITEM_NAME = "item_name";
private static final String EVENT_ITEM_PRICE = "item_price";
private static final String EVENT_ITEM_IMAGE = "item_image_id";
private static final String EVENT_EVENT_TYPE = "event_type";


 private static final String CREATE_TABLE_EVENT = "CREATE TABLE " + TABLE_EVENT
        + " (" + EVENT_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, "
        + EVENT_USERNAME + " VARCHAR, " + EVENT_ITEM_NAME + " VARCHAR, " + EVENT_ITEM_PRICE + " VARCHAR, "
        + EVENT_ITEM_IMAGE + " VARCHAR" + EVENT_EVENT_TYPE + " VARCHAR)";

用户表工作正常。谢谢你的时间

Answer 1

根据Android API

返回long新插入行的行ID，如果发生错误则返回-1

也许日志告诉你更多的调试。

Answer 2

search

create table语句字符串末尾缺少分号。尝试：

/*...*/ EVENT_EVENT_TYPE + " VARCHAR)";

SQLite Insert不起作用

2 个答案: