获取目录文件大小 @param dir @return

获取未来 第 past 天的日期 @param past @return

获取未来 任意天内的日期数组 @param intervals intervals天内 @return 日期数组

获取文件扩展名 @param fileName @return

获取目录文件个数 @return

根据文件绝对路径获取文件名 @param filePath @return

根据文件的绝对路径获取文件名但不包含扩展名 @param filePath @return

获取文件大小 @param filePath @return

计算SD卡的剩余空间 @return 返回-1，说明没有安装sd卡

将公钥私钥(默认base64加密)并转为公钥/私钥字符串还原为对应公钥/私钥 by Z10 @param keyType (publicKey / privateKey) @param keystr @return @throws Exception

Default value is zero (0) @return last saved keyboard height in px

获取过去第几天的日期 @param past @return

截取路径名 @return

Get the layout inset for any system UI that appears at the bottom of the screen. @return The layout inset (in pixels).

Get the layout inset for any system UI that appears at the right of the screen. @return The layout inset (in pixels).

Get the layout inset for any system UI that appears at the top of the screen. @param withActionBar True to include the height of the action bar, Fals

获取SD卡的根目录，末尾带\ @return

获取屏幕的亮度 @param activity @return

@param @return ==>2012-05-02 09:10:46.436

@param @return ==>2012-05-02 09:10:46.436

获取app版本号(String) @return

@param @return ==>Wed May 02 09:10:46 CST 2012

@param @return ==>2012-05-02

@param @return ==>2012-05-02

@param @return ==>2012/05/02 09:10:46

@param @return ==>2012/05/02 09:10:46