Limit on number of Android call logs

in frameworks\base\core\java\android\ Provider there are Calllog.java, in this file, each time a call is made to insert a calllog record into the call table, the function that calls Removeexpiredentries will have more than 500 records
If you want to modify its restrictions, you can do this functione.g: restrict it to different types of call logs, as follows:
1. First add a CallType parameter to the function (Incoming_type = 1; Outgoing_type = 2; Missed_type = 3;), at the same time to call these functions where the modification, will be removeexpiredentries (context);
Removeexpiredentries (Context,calltype);
2. Then inResolver.delete (Content_uri, "_id in" +
"(select _id from calls ORDER by" + Default_sort_order
+ "LIMIT-1 OFFSET)", null);
Here plus where calls.type=calltype judging condition

Limit on number of Android call logs