Android notify when phone book is updated(Content Observer)

Question

I want to get a notification on my phone if there is any change in the contact database(add,delete).Right now i am using ContentObserver to get notified.Following is my code.Problem is that i able not able to know which contact is changed.Can anyone help???

public class ContentObserverActivity extends Activity {
    Button registerbutton;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        registerbutton=(Button)findViewById(R.id.button1);
        registerbutton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
            getContentResolver()
                .registerContentObserver(
                        ContactsContract.Contacts.CONTENT_URI, true,
                        new MyCOntentObserver());   
            }
        });
    }


    public class MyCOntentObserver extends ContentObserver{
        public MyCOntentObserver() {
            super(null);
        }
        @Override
        public void onChange(boolean selfChange) {
        super.onChange(selfChange);
            Log.e("","~~~~~~"+selfChange);
        }  

        @Override
        public boolean deliverSelfNotifications() {
            return true;
        }
    }
}

Thanks in advance.

content observers don't tell you which one changed you have to find out by querying and comparing with old data — zapl, May 03 '12 at 07:45

score 8 · Accepted Answer · answered May 03 '12 at 08:56

8

Observer does not provide the information that which contact is added/update/deleted. To get to know this save the contacts in your own DB table and when observer send the change notification check it with system's Contacts.

answered May 03 '12 at 08:56

Krishnakant Dalal

3,568
7
34
62

This means comparing two lists for adds/deletes/updates ? Can you share code for comparing two lists for adds/deletes and updates ? – K Pradeep Kumar Reddy Apr 20 '23 at 13:12

score 7 · Answer 2 · answered Aug 11 '16 at 04:58

I have changed onChange code to this.

@Override
public void onChange (boolean selfChange)
{
    this.onChange(selfChange, null);
}

@Override
public void onChange (boolean selfChange,Uri uri)
{
  Cursor cursor = mCntxt.getContentResolver().query(
            ContactsContract.Contacts.CONTENT_URI, null, null, null,ContactsContract.Contacts.CONTACT_LAST_UPDATED_TIMESTAMP + " Desc");
    if (cursor.moveToNext()) {
        String id = cursor.getString(
                cursor.getColumnIndex(ContactsContract.Contacts._ID));
        String name = cursor.getString(
                cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
        Log.w("Contact ID", id);
        Log.w("Person Name",name);
       }
}

Hope this helps..

How to know that wheather contact added or deleted or updated — Ankita Singh, Dec 05 '16 at 12:04

sancelot · Answer 3 · 2014-02-26T23:28:48.943

-2

I think it may be possible using a Broadcast manager / receiver http://www.intertech.com/Blog/using-localbroadcastmanager-in-service-to-activity-communications/

edited Feb 26 '14 at 23:28

answered Feb 26 '14 at 23:13

sancelot

1,905
12
31

Android notify when phone book is updated(Content Observer)

3 Answers3

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