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public class SoftKeyboardUtil {
 
    /**
     * 关闭系统的软键盘
     * @param activity
     */
    public static void dismissSoftKeyboard(Activity activity)
    {
        View view = activity.getWindow().peekDecorView();
        if (view != null)
        {
            InputMethodManager inputmanger = (InputMethodManager)activity.getSystemService(Context.INPUT_METHOD_SERVICE);
            inputmanger.hideSoftInputFromWindow(view.getWindowToken(), 0);
        }
    }
}