Mindfulness during walking meditation During walking meditation and day to day activity if sees the mind intention of doing something is earlier than that of bodily action. Is that mindfulness enough to generate right view in a person and disappearance of sakkaya ditti?
Very good question. :)

The answer is: Yes and no.
Yes, seeing intention before the doing is a great way of getting to see anatta in action (so to speak).

No, because I fear you won't be able to keep this up. Plus it's not necessary to go into that much detail.
Don't forget that every single action is preceded by intention. You really can't keep this up. Also, the mind is way, way faster than the body. You will miss a lot which is not a problem, but it could discourage you.

Here is a proposal of what you could do:

Day 1: Pay attention to the intention related to the change of posture. So, see if you can catch the intention to stand, to sit, to lie down or to walk. 
This goes for daily life as well as walking meditation.

Day 2: Pay attention to the rising and falling of the abdomen in daily life.

Day 3: Pay attention to the four elements throughout the day.

You can create your own 'trainings schedule'. Point is that it should be doable for you, challenging but not too overwhelming so that it would be discouraging.
You can play with what you want to keep an eye on any given day. As long as it is in the realms of the four satipatthana. Then the mind will pick up the right knowledge and wisdom along the way.

In addition:
Don't forget to remind yourself. "Intention to sit, intention to sit, intention to sit"; "intention to walk, intention to walk, intention to walk"; "hard, hard, hard"; "soft, soft, soft"; "rising, falling; rising, falling"... and so on.
That reminding yourself is the sati-part of the practice (mindfulness).

Have fun! :)