hide keyboard in Android
This question already has an answer here:
 You can hide the virtual keyboard using the InputMethodManager , calling hideSoftInputFromWindow , passing in the token of the window containing your view.  
View view = this.getCurrentFocus();
if (view != null) {  
    InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
    imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
}
 You will need context to for initiating the InputMethodManager and then you can use this code for the view you want.  
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