Android的;我只有2个触点，但我可以从查询，为什么得到5？ [英] Android; I only have 2 contacts, yet I can obtain 5 from a query, why?

问题描述

我在模拟器设置2测试触点。

我运行下面的查询，就应该选择他们两个，填充我的域对象，并添加到列表中。因此，在底部的输出应该是2，但它是5，这是为什么？ （cursor.getCount（）是5，而不是2）

我已经经历了，而每次循环加强，它是retreving相同的接触多次，但与 POST code ，如不同的值电话号码

  ContentResolver的CR = getContentResolver（）;
        光标光标= cr.query（ContactsContract.Data.CONTENT_URI，
                NULL，NULL，NULL，NULL）;
        名单＆LT; MeCercanaContact＆GT;联系人=新的ArrayList＆LT; MeCercanaContact＆GT;（）;
        如果（cursor.getCount（）大于0）
        {
            而（cursor.moveToNext（））
            {
                MyContact myContact =新MyContact（）;
                字符串给定名称= cursor.getString（cursor.getColumnIndex（
                        ContactsContract.Contacts.DISPLAY_NAME））;
                字符串后code = cursor.getString（cursor.getColumnIndex（
                        ContactsContract.CommonDataKinds.StructuredPostal.POST code））;
                myContact.setFirstName（给定名称）;
                myContact.setLastName（交code）;
                contacts.add（myContact）;
            }
        }
        的System.out.println（contacts.size（））;
 

解决方案

正在查询ContactsContract.Data，这是保存的各种联系方式，如电话号码，邮寄codeS等列表的通用容器你必须过滤结果的ContactsContract.Data.MIMETYPE列等于StructuredPostal.CONTENT_ITEM_TYPE行：

所以查询更改为：

 光标光标= cr.query（ContactsContract.Data.CONTENT_URI，
     NULL，NULL，ContacsContract.Data.MIMETYPE +=+
ContactsContract.StructuredPostal.CONTENT_ITEM_TYPE +'，NULL）;
 

请参阅 ContactsContract.Data

I have setup 2 test contacts in my emulator.

I'm running the following query, it should pick them both out, populate my domain object, and add to a list. The output at the bottom should therefore be 2, but it is 5, why is this? (cursor.getCount() is 5 instead of 2)

I have stepped through each iteration of the while loop and it is retreving the same contact multiple times, but with different values for POSTCODE, such as the phone number

ContentResolver cr = getContentResolver();
        Cursor cursor = cr.query(ContactsContract.Data.CONTENT_URI,
                null, null, null, null);
        List<MeCercanaContact> contacts = new ArrayList<MeCercanaContact>();
        if (cursor.getCount() > 0)
        {
            while (cursor.moveToNext())
            {
                MyContact myContact = new MyContact();
                String givenName = cursor.getString(cursor.getColumnIndex(
                        ContactsContract.Contacts.DISPLAY_NAME));
                String postcode = cursor.getString(cursor.getColumnIndex(
                        ContactsContract.CommonDataKinds.StructuredPostal.POSTCODE));
                myContact.setFirstName(givenName);
                myContact.setLastName(postcode);
                contacts.add(myContact);
            }
        }
        System.out.println(contacts.size());

解决方案

You are querying ContactsContract.Data, which is a generic container that holds a list of various contact details, such as phone numbers, postal codes etc.. You must filter the results for the rows whose ContactsContract.Data.MIMETYPE column equals StructuredPostal.CONTENT_ITEM_TYPE:

So change the query to:

Cursor cursor = cr.query(ContactsContract.Data.CONTENT_URI,
     null, null, ContacsContract.Data.MIMETYPE +  "='" + 
ContactsContract.StructuredPostal.CONTENT_ITEM_TYPE + "'", null);

See ContactsContract.Data

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