Sms ContentObserver onChange() fires multiple times

Question

I know this question has been asked multiple times, but nobody has been able to come up with a working answer from what I have seen.

Im working on an app to intercep

Answer 1

here is my code, it works fine for me

public class SmsObserver extends ContentObserver {  
    private Context context;
    private static int initialPos;
    private static final String TAG = "SMSContentObserver";
    private static final Uri uriSMS = Uri.parse("content://sms/sent");

    public SmsObserver(Handler handler, Context ctx) {
        super(handler);
        context = ctx;
        initialPos = getLastMsgId();

    }

    @Override
    public void onChange(boolean selfChange) {
        super.onChange(selfChange);
        queryLastSentSMS();
    }

    public int getLastMsgId() {

        Cursor cur = context.getContentResolver().query(uriSMS, null, null, null, null);
        cur.moveToFirst();
        int lastMsgId = cur.getInt(cur.getColumnIndex("_id"));
        Log.i(TAG, "Last sent message id: " + String.valueOf(lastMsgId));
        return lastMsgId;
    }

    protected void queryLastSentSMS() {

        new Thread(new Runnable() {

            @Override
            public void run() {
                Cursor cur =
                    context.getContentResolver().query(uriSMS, null, null, null, null);

                if (cur.moveToNext()) {


                    try {
                        if (initialPos != getLastMsgId()) {
                            // Here you get the last sms. Do what you want.
                            String receiver = cur.getString(cur.getColumnIndex("address"));
                           System.out.println(" Receiver Ph no :"+receiver);


                            // Then, set initialPos to the current position.
                            initialPos = getLastMsgId(); 
                        }
                    } catch (Exception e) {
                        // Treat exception here
                    }
                }
                cur.close();
            }
        }).start();

    }

}//End of class SmsObserver