Question

我正在尝试使用CursorLoader

查询数据库

这是来自加载程序的查询

11-24 17：33：21.507：E / ACRA（32418）：引起： android.database.sqlite.SQLiteException：near“）”：语法错误（代码 1）:,编译时：SELECT _id，contact_id，photo_uri，data1，查找FROM view_data数据WHERE（1）AND（（（mimetype =？OR mimetype =？） AND data1 like？％））ORDER BY lookup

在“）”附近有什么不对，我看不到？ - 这就是我的查询参数看起来像

的原因

Uri AUTO_COMPLETE_CONTACT_URI = Data.CONTENT_URI;

String[] AUTO_COMLETE_PROJECTION = {Data._ID, Data.CONTACT_ID, Data.PHOTO_URI,   Data.DATA1 ,Data.LOOKUP_KEY};
String AUTO_COMPLETE_SELECTION_LIKE_QUERY = AUTO_COMPLETE_SELECTION + " AND " + Data.DATA1 + " like ?";

public static String[] getAutoCompleteQuerySelectionArgs(String query) {
    return new String[] { Email.CONTENT_ITEM_TYPE, Phone.CONTENT_ITEM_TYPE, query+"%" };
}

/** This method is invoked by initLoader() */
@Override
public Loader<Cursor> onCreateLoader(int id, Bundle data) {
    switch(id) {
    case ContactsQuery.AUTO_COMPLETE_QUERY_ID:
        Uri uri = ContactsQuery.AUTO_COMPLETE_CONTACT_URI;  
        if(data!=null) {
        String query = data.getString(ContactsQuery.AUTO_COMPLETE_QUERY);
        return new CursorLoader(getActivity().getBaseContext(), uri, ContactsQuery.AUTO_COMLETE_PROJECTION, ContactsQuery.AUTO_COMPLETE_SELECTION_LIKE_QUERY , Query.getAutoCompleteQuerySelectionArgs(query), ContactsQuery.AUTO_COMPLETE_SORT_ORDER); 
        }else {
            return  new CursorLoader(getActivity().getBaseContext(), uri, ContactsQuery.AUTO_COMLETE_PROJECTION, ContactsQuery.AUTO_COMPLETE_SELECTION , null, ContactsQuery.AUTO_COMPLETE_SORT_ORDER);
        }
    }
return null;
}

/** This method is executed in ui thread, after onCreateLoader() */
@Override
public void onLoadFinished(Loader<Cursor> arg0, Cursor c) { 
    chipsCursorAdapter.swapCursor(c);       
}

@Override
public void onLoaderReset(Loader<Cursor> loader) {
    chipsCursorAdapter.swapCursor(null);
}

Answer 1

您的LIKE模式不使用正确的SQL语法。

%必须在字符串内（即引号内），但?必须在外面，所以你必须将它们连接起来：

... AND data1 LIKE ? || '%')) ORDER BY ...

我的查询有什么问题

1 个答案: