Volume up key to answer call I'm running Android device on version 5.1 and my device doesn't have any buttons except power and volume. 

I want my volume up key to answer incoming calls. Is there any exposed or any other method to help facilitate the ask?
Alternatively with Tasker;

Now for the Task:

Task 1 Answering the call

Create a named task :

Action: Phone >> Take Call

 
(click images for larger variants)

Exit out of the task.

Task 2

Ending the phone call

Create another named task:

Acion: Action: Phone >> End Call

 

Create a new Profile

State >> Hardware >> Button [Next] (which is similar to volume up) Check Stop Event.

 

 

For the second profile the proccedure is the same but this time a media button used is "previous" instead of "next".



Activate all profiles

Thats all.