How to close soft keyboard on button press

How can my app hide the soft keyboard when a button is pressed?
A simple example of this requirement would be a search box within your app. This would be defined in your layout markup as a EditText view and a Button view. Once the user has entered some text, they will typically click on the search button. Default behaviour is that the soft keyboard is still visible until the user dismisses it. You can hide the keyboard using the following code, probably on the button click handler:

InputMethodManager inputMgr = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
EditText editText = (EditText)findViewById(R.id.editText);
inputMgr.hideSoftInputFromWindow(editText.getWindowToken(), 0);

The method requires a reference to the EditText view that was the source of the soft keyboard launch.