/***
     * 获取导航栏的高度
     * @return
     */
    private int getNavigatorBarHeight() {
        int resourceId = getResources().getIdentifier("navigation_bar_height", "dimen", "android");
        int height = getResources().getDimensionPixelSize(resourceId);
        return height;
    }

    /****
     * @return true为显示软键盘 false为显示软键盘
     */
    private boolean isShowKeyboard(){
        int screenHeight = getWindow().getDecorView().getHeight();
        Rect rect = new Rect();
        getWindow().getDecorView().getWindowVisibleDisplayFrame(rect);
        return  !(screenHeight <= (rect.bottom+getNavigatorBarHeight()));
    }

    /***
     * 隐藏软件
     */
    private void hideKeyboard(){
        InputMethodManager inputMethodManager =  ((InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE));
        inputMethodManager.hideSoftInputFromWindow(ContactsActivity.this.getCurrentFocus().getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
    }

以上代码在LG、三星、Vovi、华为手机上一验证，欢迎纠正