Android:使用ContactsContract.CommonDataKinds.Phone检索联系人时重复联系人数据 [英] Android : Duplicate contact data while retrieving contacts using ContactsContract.CommonDataKinds.Phone

问题描述

我浏览了很多帖子，但没有找到有效甚至正确回答问题的答案.我最接近的是在将联系人信息加载到Listview时如何避免重复的联系人姓名(数据)?，但这会产生过多的开销.有没有更简单或更有效的方法来解决这个问题?

I have gone through a lot of posts but didn't find any answer that answers the question efficiently or even correctly. The closest I came was this How to avoid duplicate contact name (data ) while loading contact info to listview? but this has too much overhead. Is there any simpler or more efficient way to solve this?

推荐答案

我遇到了同样的问题:我正在获取重复的电话号码.我通过为每个光标条目获取归一化的数字并使用HashSet跟踪已找到的数字来解决此问题.试试这个:

I had the same problem you had: I was getting duplicate phone numbers. I solved this problem by obtaining the normalized number for each cursor entry and using a HashSet to keep track of which numbers I'd already found. Try this:

private void doSomethingForEachUniquePhoneNumber(Context context) {
    String[] projection = new String[] {
            ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME,
            ContactsContract.CommonDataKinds.Phone.NUMBER,
            ContactsContract.CommonDataKinds.Phone.NORMALIZED_NUMBER,
            //plus any other properties you wish to query
    };

    Cursor cursor = null;
    try {
        cursor = context.getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, projection, null, null, null);
    } catch (SecurityException e) {
        //SecurityException can be thrown if we don't have the right permissions
    }

    if (cursor != null) {
        try {
            HashSet<String> normalizedNumbersAlreadyFound = new HashSet<>();
            int indexOfNormalizedNumber = cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NORMALIZED_NUMBER);
            int indexOfDisplayName = cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME);
            int indexOfDisplayNumber = cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);

            while (cursor.moveToNext()) {
                String normalizedNumber = cursor.getString(indexOfNormalizedNumber);
                if (normalizedNumbersAlreadyFound.add(normalizedNumber)) {
                    String displayName = cursor.getString(indexOfDisplayName);
                    String displayNumber = cursor.getString(indexOfDisplayNumber);
                    //haven't seen this number yet: do something with this contact!
                } else {
                    //don't do anything with this contact because we've already found this number
                }
            }
        } finally {
            cursor.close();
        }
    }
}

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