I want to override the default android messaging application. If I receive a sms or mms I want to send that to email but i don\'t want any notification on phone. So basica
There isn't a "default application" in the way you're thinking. The way applications are dispatched in Android is through Intents. An application wil use an IntentFilter to identify that it can handle specific types of Intents. What you're looking for is a BroadcastReceiver that can handle the SMSReceived intent. That will allow your application to be notified when an SMS is received. In order to hide the notification, you will need to mark the SMS as read using the SMS ContentProvider. That will clear the notification out of the notification tray. There is no way to hide a message from the default messaging application unless you delete the message from the SMS ContentProvider. Check out this link for how to get started with BroadcastReceivers.