How to set the distance between the buttons?

How to set the distance between the buttons?

References

Reference NO 1

http://stackoverflow.com/questions/15187600/how-to-set-the-distance-between-the-buttons

Reference NO 2

http://stackoverflow.com/questions/4994844/android-layout-set-spacing-between-image-buttons

Reference NO 3

http://stackoverflow.com/questions/2095886/htmlcss-space-between-input-buttons

Reference NO 4

http://stackoverflow.com/questions/6146096/android-linearlayout-how-to-position-three-buttons-left-right-and-center

Reference NO 5

http://stackoverflow.com/questions/10759282/actionbarsherlock-how-to-set-the-padding-of-each-actionbars-icon

Reference NO 6

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Reference NO 7

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Reference NO 8

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