You must call getDynamicLink() in every activity that might be launched by the link, even though the link might be available from the intent using getIntent().getData(). Calling getDynamicLink() retrieves the link and clears that data so it is only processed once by your app.

You normally call getDynamicLink() in the main activity as well as any activities launched by intent filters that match the link.

Consider this deep link URL as example.
https://aksharaontech.com?courseid=1234&chapterid=21&subchapterid=12&contenttype=questionbank&contentid=10258cef

Here in the above deep link url we are passing host and required parameters separated with ampersand to access a particular content directly without being following the normal app flow.

We will parse the host-aksharaontech.com and different parameters which we can use to do appropriate action (In this case we can use courseid, chapterid, subchapterid, contenttype and contentid and open the particular content on launch of the app) in side the app.

After accessing the deep link URL (created earlier while creating dynamic links using firebase console) on launch of app you can parse the URL so you can get your required parameters from it and can use your own execution to open the linked content.

An example of accessing linked content directly by launching the app. Here we have generated a QR code of the dynamic link. By scanning QR code we will launch the app and on the launch it will redirect to the linked content.