Can not update contact using ContentProvoider

Uri name=null;
           String []whereargs={"Sameer Ahmad"};
    name=Uri.withAppendedPath(People.CONTENT_URI,People.Phones.CONTENT_DIRECTORY);
    cv1.put(People.NAME,"Tofeeq Ahma开发者_如何学God");
    int i1=0;
    i1=getContentResolver().update(name,cv1,"name=?",whereargs);
    }
    catch(Exception e){
        e.getMessage();

I am trying to update a phone numder by URi but its showing the Exception:Cannot Update//Contacts/people/phone.Same error in inserting.

1. I want to create shared data base which will be accessible from every application

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have you declared the necessary permission in your manifest?

<uses-permission android:name="android.permission.WRITE_CONTACTS" />