Question

我试图通过显示名称找到联系人。目标是打开此联系人并向其添加更多数据（特别是更多电话号码），但我甚至都在努力找到我想要更新的联系人。

这是我使用的代码：

    public static String findContact(Context context) {

    ContentResolver contentResolver = context.getContentResolver();
    Uri uri = ContactsContract.CommonDataKinds.Phone.CONTENT_FILTER_URI;
    String[] projection = new String[] { PhoneLookup._ID };
    String selection = ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME + " = ?";
    String[] selectionArguments = { "John Johnson" };
    Cursor cursor = contentResolver.query(uri, projection, selection, selectionArguments, null);

    if (cursor != null) {
        while (cursor.moveToNext()) {
            return cursor.getString(0);
        }
    }
    return "John Johnson not found";
}

我确实有一个名为＆＃34; John Johnson＆＃34;的联系人，但该方法始终返回＆＃34;未找到＆＃34;。我也尝试用一个名字搜索联系人，这没什么区别。

我怀疑uri，选择或选择参数有问题，因为我无法在网上找到任何搜索具有给定显示名称的联系人的例子，而且显示名称似乎是特殊类型的信息，例如电话号码。

我有什么想法可以找到约翰逊？

更新：我发现如何按展示名称查找联系人：

        ContentResolver contentResolver = context.getContentResolver();
    Uri uri = Data.CONTENT_URI;
    String[] projection = new String[] { PhoneLookup._ID };
    String selection = StructuredName.DISPLAY_NAME + " = ?";
    String[] selectionArguments = { "John Johnson" };
    Cursor cursor = contentResolver.query(uri, projection, selection, selectionArguments, null);

    if (cursor != null) {
        while (cursor.moveToNext()) {
            return cursor.getString(0);
        }
    }
    return "John Johnson not found";

此代码返回第一个联系人的联系ID，显示名称为＆＃34; John Johnson＆＃34;。在我的原始代码中，我的查询中包含错误的uri和错误的选择。

Answer 1

我认为问题可能是由你设定的投影引起的。 Projection用于告诉android你要查询哪个数据列，然后你只给id列，这样显示名就不会返回。尝试删除投影以查看它是否有效。

-- Cursor cursor = contentResolver.query(uri, projection, selection, selectionArguments, null);
++ Cursor cursor = contentResolver.query(uri, null, selection, selectionArguments, null);

Answer 2

           //method for gaining id
//this method get  a name  and make fetch it's id  and then send the id to other method //named "showinformation" and that method print information of that contact  
         public void id_return(String name) {
                String id_name=null;
                Uri resultUri = ContactsContract.Contacts.CONTENT_URI;
                Cursor cont = getContentResolver().query(resultUri, null, null, null, null);
                String whereName = ContactsContract.Data.MIMETYPE + " = ? AND " + ContactsContract.CommonDataKinds.StructuredName.DISPLAY_NAME + " = ?" ; 
                String[] whereNameParams = new String[] { ContactsContract.CommonDataKinds.StructuredName.CONTENT_ITEM_TYPE,name};
                Cursor nameCur = getContentResolver().query(ContactsContract.Data.CONTENT_URI, null, whereName, whereNameParams, ContactsContract.CommonDataKinds.StructuredName.GIVEN_NAME);
                while (nameCur.moveToNext()) {
                id_name = nameCur.getString(nameCur.getColumnIndex(ContactsContract.CommonDataKinds.StructuredName.CONTACT_ID));}
                nameCur.close();
                cont.close();
                nameCur.close();
//for calling of following method
                showinformation(id_name);
            }

            //method for showing information like name ,phone, email and other thing you want
            public void showinformation(String  id) {
                String name=null;
                String phone=null;
                String email=null;
                Uri resultUri = ContactsContract.Contacts.CONTENT_URI;
                Cursor cont = getContentResolver().query(resultUri, null, null, null, null);
                String whereName = ContactsContract.Data.MIMETYPE + " = ? AND " + ContactsContract.CommonDataKinds.StructuredName.CONTACT_ID+ " = ?" ; 

                String[] whereNameParams1 = new String[] { ContactsContract.CommonDataKinds.StructuredName.CONTENT_ITEM_TYPE,id};
                Cursor nameCur1 = getContentResolver().query(ContactsContract.Data.CONTENT_URI, null, whereName, whereNameParams1, ContactsContract.CommonDataKinds.StructuredName.GIVEN_NAME);
                while (nameCur1.moveToNext()) {
                name = nameCur1.getString(nameCur1.getColumnIndex(ContactsContract.CommonDataKinds.StructuredName.DISPLAY_NAME));}
                nameCur1.close();
                cont.close();
                nameCur1.close();


                String[] whereNameParams2 = new String[] { ContactsContract.CommonDataKinds.Phone.CONTENT_ITEM_TYPE,id};
                Cursor nameCur2 = getContentResolver().query(ContactsContract.Data.CONTENT_URI, null, whereName, whereNameParams2, ContactsContract.CommonDataKinds.StructuredName.GIVEN_NAME);
                while (nameCur2.moveToNext()) {
                phone = nameCur2.getString(nameCur2.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));}
                nameCur2.close();
                cont.close();
                nameCur2.close();


                String[] whereNameParams3 = new String[] { ContactsContract.CommonDataKinds.Email.CONTENT_ITEM_TYPE,id};
                Cursor nameCur3 = getContentResolver().query(ContactsContract.Data.CONTENT_URI, null, whereName, whereNameParams3, ContactsContract.CommonDataKinds.StructuredName.GIVEN_NAME);
                while (nameCur3.moveToNext()) {
                email = nameCur3.getString(nameCur3.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA));}
                nameCur3.close();
                cont.close();
                nameCur3.close();

                String[] whereNameParams4 = new String[] { ContactsContract.CommonDataKinds.StructuredPostal.CONTENT_ITEM_TYPE,id};
                Cursor nameCur4 = getContentResolver().query(ContactsContract.Data.CONTENT_URI, null, whereName, whereNameParams4, ContactsContract.CommonDataKinds.StructuredPostal.DATA);
                while (nameCur4.moveToNext()) {
                phone = nameCur4.getString(nameCur4.getColumnIndex(ContactsContract.CommonDataKinds.StructuredPostal.DATA));}
                nameCur4.close();
                cont.close();
                nameCur4.close();
    //showing result
             txadd.setText("Name= "+ name+"\nPhone= "+phone+"\nEmail= "+email);  


            }

 //thank all persons in this site because of many help of me to learn and correction my warn and errors this is only a gift for all of you and ...

Answer 3

以下代码应该可以解决问题

  if (displayName != null) {
        Uri lookupUri = Uri.withAppendedPath(ContactsContract.Contacts.CONTENT_FILTER_URI, Uri.encode(displayName));
        String[] displayNameProjection = { ContactsContract.Contacts._ID, ContactsContract.Contacts.LOOKUP_KEY, Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB ? ContactsContract.Contacts.DISPLAY_NAME_PRIMARY : ContactsContract.Contacts.DISPLAY_NAME };
        Cursor cur = context.getContentResolver().query(lookupUri, displayNameProjection, null, null, null);
        try {
            if (cur.moveToFirst()) {
                return true;
            }
        } finally {
            if (cur != null)
                cur.close();
        }
        return false;
    } else {
        return false;
    }

参考：Retrieving a List of Contacts Article

Answer 4

更改您的查询URI。

您正在使用仅用于过滤电话号码的URI：

Uri uri = ContactsContract.CommonDataKinds.Phone.CONTENT_FILTER_URI;

您需要使用可以访问display_name列的URI，如下所示：

Uri uri = ContactsContract.Data.CONTENT_URI;

在Android SDK Documentation上使用哪些URI以及何时使用它们是一个不错的细分：

如果您需要阅读单个联系人，请考虑使用CONTENT_LOOKUP_URI而不是CONTENT_URI。



如果您需要通过电话号码查找联系人，请使用针对此目的进行优化的PhoneLookup.CONTENT_FILTER_URI。



如果您需要按部分名称查找联系人，例如要生成按类型过滤的建议，请使用CONTENT_FILTER_URI URI。



如果您需要通过电子邮件地址，昵称等某些数据元素查找联系人，请使用针对ContactsContract.Data表的查询。结果将包含联系人ID，姓名等。

Android - 按展示名称查找联系人

4 个答案:

更改您的查询URI。