// 隐藏系统键盘
    public void hideSoftInputMethod(EditText ed){
        
        int currentVersion = android.os.Build.VERSION.SDK_INT;
        String methodName = null;
        if(currentVersion >= 16){
            // 4.2
            methodName = "setShowSoftInputOnFocus";
        }
        else if(currentVersion >= 14){
            // 4.0
            methodName = "setSoftInputShownOnFocus";
        }

        if(methodName == null){
            ed.setInputType(InputType.TYPE_NULL);
        }
        else{
            Class<EditText> cls = EditText.class;
            Method setShowSoftInputOnFocus;
            try {
                setShowSoftInputOnFocus = cls.getMethod(methodName, boolean.class);
                setShowSoftInputOnFocus.setAccessible(true);
                setShowSoftInputOnFocus.invoke(ed, false);
            } catch (NoSuchMethodException e) {
                ed.setInputType(InputType.TYPE_NULL);
                e.printStackTrace();
            } catch (InvocationTargetException e) {
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
        }
    }