I have to open my android application, when user clicks on a link that has my domain name. For example, lets say my domain is abc.com and i have posted this link on my Faceb
You have to define a custom Intent Filter in the activity that should be launched when the url is clicked.
Let say that you want to launch the FirstActivity when a user click a http://www.example.com/ link on a web page.
Add this to your activity in the Manifest :
When the user will click a HTML link to http://www.example.com/, the system will prompt either to use the browser or your app.