Below I am writing a method that will hide the soft keyboard in android.

I just use hideSoftInputFromWindow() method of InputMethodManager in this method.

public static void hideKeyboard(Activity activity) {
        //start with an 'always hidden' command for the activity's window
        activity.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
        //now tell the IMM to hide the keyboard FROM whatever has focus in the activity
        InputMethodManager inputMethodManager = (InputMethodManager) activity.getSystemService(Activity.INPUT_METHOD_SERVICE);
        View currentFocusedView = activity.getCurrentFocus();
        if (currentFocusedView != null) {
            inputMethodManager.hideSoftInputFromWindow(currentFocusedView.getWindowToken(), 0);
        }
    }