title: How to read the incoming message using service in background in android?
body: <p>I am developing an android application in that i want to read the incoming message without knowing the user.I want to always run the incoming message checker in background.If a new message is received means i want to read the content of the message and that message contains some words(password) means i want to activate the application </p>
  
  <p>Please explain me how to do that with sample code because i am new to android </p>