To open a link outside of your application, you can use an intent with the ACTION_VIEW action and a URI pointing to the destination application. In your case, to open a link in the Play Store app, you can use the URI "market://details?id=[package_name]" where [package_name] is the package name of the app you want to open in the Play Store.
Here's an example of how to open a link in the Play Store app:
Uri uri = Uri.parse("market://details?id=com.example.package");
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
In this example, "com.example.package" is the package name of the app you want to open in the Play Store. When you call startActivity() with this intent, the Play Store app will be launched and the app's details page will be displayed.
I hope this helps!