public class InCallLogger extends BroadcastReceiver {

Context ctx;
  String number;

@Override
public void onReceive(final Context context, Intent intent) {
    ctx = context;

        Bundle extras = intent.getExtras();
        if (extras == null)
            return;
        String state = extras.getString(TelephonyManager.EXTRA_STATE);
        if (state == null)
            return;
        gps = new Gpsadd(context);

        // ringing
        if (state.equals(TelephonyManager.EXTRA_STATE_RINGING)) {

            timeStarted = System.currentTimeMillis();

            number = extras
                    .getString(TelephonyManager.EXTRA_INCOMING_NUMBER);
            number = number.toString().replaceAll("\+", "");
            // System.out.println("From mesages::" + message);
            TelephonyManager tm = (TelephonyManager) context
                    .getSystemService(Context.TELEPHONY_SERVICE);
            simNumber = tm.getLine1Number();
            isRoaming = tm.isNetworkRoaming();
            System.out.println("incoming call broadcast  ringing");

            return;
        }

        // answered
        if (state.equals(TelephonyManager.EXTRA_STATE_OFFHOOK)
                && timeStarted != -1L) {


            return;
        }

        // ended
        if (state.equals(TelephonyManager.EXTRA_STATE_IDLE)
                && timeStarted != -1L) {



            return;

    }
}

<uses-permission android:name="android.permission.CALL_PHONE" />
  <receiver android:name="incoming.InCallLogger" >
        <intent-filter>
            <action android:name="android.intent.action.PHONE_STATE" />
        </intent-filter>
    </receiver>