Android的一些随机的联系 [英] Android Get Random Contact

问题描述

我想从手机的联系人列表中的联系人随机，但没有明显放缓的手机。这意味着，我不能只抓住所有的联系人，并将他们粘成一个阵列，并挑选从数组随机之一。我希望能够得到一个随机的联系，而不必让所有的联系人的第一。
这是可能的，如果是这样，我怎么会去这样做呢？

I'm trying to get a random contact from a phone's contact list, but without noticeably slowing down the phone. That means that I can't just grab all the contacts and stick them into an array and pick a random one from that array. I'd like to be able to get a random contact without having to get all of the contacts first. Is this possible, and if so, how would I go about doing it?

推荐答案

更​​新使用非德precated code。基于这个答案查询：<一href=\"http://stackoverflow.com/questions/1721279/how-to-read-contacts-on-android-2-0/1780818#1780818\">How阅读关于Android 2.0的接触

Updated to use non-deprecated code. Query based on this answer: How to read contacts on Android 2.0

Cursor managedCursor = getContentResolver().query(ContactsContract.Contacts.CONTENT_URI,null, null, null, null); 

然后，它只是一个让光标的大小事：

Then it's just a matter of getting the size of the Cursor:

int size = managedCursor.getCount();

获得一个随机的，阅读并检查是否有电话号码。如果没有，请另外选择一个：

get a random one, read it and check if it has phone numbers. If not, choose another one:

boolean found = false;
Random rnd = new Random();
while(!found) {
  int index = rnd.nextInt(size);    
  managedCursor.moveToPosition(index);
  String name = managedCursor.getString(people.getColumnIndex(PhoneLookup.DISPLAY_NAME));
  found = Boolean.parseBoolean(managedCursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER))); 
  if (found) {
    Cursor phones = getContentResolver().query( 
    ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, 
    ContactsContract.CommonDataKinds.Phone.CONTACT_ID +" = "+ contactId, null, null); 
    while (phones.moveToNext()) { 
     String phoneNumber = phones.getString(phones.getColumnIndex( ContactsContract.CommonDataKinds.Phone.NUMBER));
     Log.d("Phone found:", phoneNumber);                 
    } 
    phones.close();
  }
}

我不明白你怎么能选择一个随机否则为1。而这不应该放慢了电话，除非它是一个非常大的联系人列表中。

I don't see how you could pick a random one otherwise. And this should not slow the phone down unless it's a really large contacts list.

现在它会检查电话号码的presence如果发现读取所有的人。如果不是，它选择了另一个入口。

Now it checks for the presence of phone numbers and reads all of them if found. If not, it chooses another entry.

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