I noticed that many people looking for the answer to same question however they always have different results and incomplete, I would like help from someone explain as simple as possible to help all users.

I will start programming an android now and wanted help, is as follows:

I have a TextView with id = value
and one SeekBar with id = seekbar.

Wanted the seekbar 0-200 than 1 in 1, showing the values ​​in TextView.
And to correct the problem of sensitivity was wondering how to put two buttons + and - to increment or decrement a.

I thank you on behalf of all my college class.