change the color of button -->for solving issues #152, #25, #172,#86 #175
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I change the color of button (TRY ME!) for showing someone how to change the color. solving the issuses #152, #25, #172,#86
steps to change the color or style : import library source code and change or customize the color or style.
![2018-03-26 10 40 33](https://user-images.githubusercontent.com/31748826/37913224-646bcb4e-30e2-11e8-91fc-a67e6e5c7e60.png)
![2018-03-26 10 44 31](https://user-images.githubusercontent.com/31748826/37913427-d9be00b0-30e2-11e8-888b-63a10ceb04cf.png)
In SampleActivity.java,
here is code to set the button of colors
then go to library/color, change anything you want.