I have searched a lot but every method did not work what should I do? can anyone here guide me?
You can't delete SMS messages from the inbox on devices with Android 4.4 or latest OS / API.
The system now allows only the default app to write message data to the provider, although other apps can read at any time.
http://developer.android.com/about/versions/kitkat.html
No exception will be thrown if you try; nothing will be deleted.