We regret to let you know that we have tried to reproduce the issue “Entry field color is changed in Xamarin.Forms.Android”, but it is working fine as expected. Kindly refer the sample in the below link which we created to reproduce the reported issue.
Can you please explain the operation you made in the agree button click event and also let us know whether entry fields are associated with your PDF document or else added separately in the view?
Kindly share the following details to analyze more on this issue and it will be helpful for us to analyze more on this issue.
1. Modify / Simple sample with which the issue could be reproduced.
2. Replication procedure to reproduce the issue or screen shot illustrating the issue.
3. Android device specification with the OS version.
4. PDF document with which the issue could be reproduced