Android open keyboard on button click

You can open keyboard using following code

InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
inputMethodManager.toggleSoftInputFromWindow(
txt_credit.getApplicationWindowToken(),
InputMethodManager.SHOW_FORCED, 0);

replace txt_credit with your edit text's view 

place above code in button's on click

Android button with nice design

FButton is a custom Button of Android with "Flat UI" concept. It's customizable and it looks how flat design should look nowadays.

library available on github : https://github.com/hoang8f/android-flat-button