我有兩個1:1關係的表,我使用內容提供者和光標加載器。CursorLoader - 兩個表連接查詢?
我如何使用加載器進行連接查詢?我可以用內部提供程序中的rawSql以某種方式破解它,但是如何在遊標加載器構造函數中完成它是超出我的。
非常感謝!
private static final String CREATE_TABLE_ARTICLES = "create table "
+ TABLE_ARTICLES + "("
+ COLUMN_ARTICLE_ID + " integer primary key autoincrement, "
+ COLUMN_URL + " text not null unique, "
+ COLUMN_TITLE + " text not null, "
+ COLUMN_PRICE + " text not null, "
+ COLUMN_ADDED + " text not null, "
+ COLUMN_IMG_URL + " text);";
private static final String CREATE_TABLE_ARTICLE_DETAIL = "create table "
+ TABLE_ARTICLE_DETAILS + "("
+ COLUMN_ARTICLE_DETAIL_ID + " integer primary key autoincrement, "
+ COLUMN_DESC + " text not null, "
+ COLUMN_LOCALITY + " text, "
+ COLUMN_TYPE + " text not null, "
+ COLUMN_SELLER + " text not null, "
+ COLUMN_SELLER_PHONE + " text, "
+ COLUMN_IMAGE_COUNT + " integer default 0, "
+ COLUMN_ARTICLE + " integer, foreign key (" + COLUMN_ARTICLE + ") references " + TABLE_ARTICLES + "(" + COLUMN_ARTICLE_ID + "));";
我敢肯定你會需要編寫原始SQL做連接。 – Falmarri
在創建光標加載器時,我將如何編寫原始SQL查詢?它只接受那些字符串作爲參數(投影,選擇等) http://developer.android.com/reference/android/content/CursorLoader.html – urSus