I have got the api response now i want to get only one value from the response.
I want to this value from response [progressdetails] = > array();
$response = Mage::getModel('usa/shipping_carrier_fedex')->getTracking($data[$i]['track_number']); $trackings = $response->getTrackings()->getData('progressdetails');
echo "<pre>";
print_r($trackings);
exit;
$response = Mage::getModel('usa/shipping_carrier_fedex')->getTracking(track_number);
$trackData = $response->getAllTrackings();
$progressData = $trackData[0]->getData('progressdetail');
$deliveredStatus = $progressData[0]['activity'];
its work for me. Happy Coding. :)