android - Matching incoming and outgoing phone numbers -

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i'm making sms viewing application , using contentresolver obtain sms messages on phone (yes, understand risks). other applications, want group messages same person 1 thread, display latest message them, , order contacts date of last message.

when comes address values of incoming messages, contain country code (e.g. +44123456789). when user saves contacts, ignore country code , type in local format. outgoing messages stored 0123456789.

so, database contain same address in both formats, +44123456789 , 0123456789. how match 2 , remove duplicate address?

note: 1) messages same person may not have same "thread id" 2) there may not "contact id"/"display name" value address

actually, messages , same contact in same thread, therefore have same thread_id. (apart multiple recipient messages, in own thread).

by looking in content://sms , storing list of obtained thread_ids can make sure there's no duplicates. address value can use following code obtain display name.

now, i'm trying optimise this:

private string quickcallerid(string phonenumber){     uri uri = uri.withappendedpath(phonelookup.content_filter_uri, uri.encode(phonenumber));     contentresolver resolver=getcontentresolver();     cursor cur = resolver.query(uri, new string[]{phonelookup.display_name}, null, null, null);     if(cur!=null&&cur.movetofirst()){             string value=cur.getstring(cur.getcolumnindex(phonelookup.display_name));             if(value!=null){                  cur.close();                 return value;             }     }     cur.close();     return ""; }

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