<uses-permissionandroid:name="android.permission.READ_CONTACTS"/>
content://com.android.contacts/contacts操作的数据是联系人信息Uri
content://com.android.contacts/data/phones联系人电话Uri
content://com.android.contacts/data/emails联系人EmailUri

Cursorcursor = getContentResolver().query(ContactsContract.Contacts.CONTENT_URI,
null, null, null, null);
while (cursor.moveToNext()) {
      String contactId =cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID));
      String name =cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
      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.i("RongActivity", "phoneNumber="+phoneNumber);
      }
      phones.close();
      Cursor emails =getContentResolver().query(ContactsContract.CommonDataKinds.Email.CONTENT_URI,
      null,
      ContactsContract.CommonDataKinds.Email.CONTACT_ID+ " = " + contactId,
      null,null);
      while (emails.moveToNext()) {
            // This would allow you get severalemail addresses
            String emailAddress =emails.getString(emails.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA));
            Log.i("RongActivity","emailAddress="+ emailAddress);
      }
      emails.close();
}
cursor.close();

--转自