Android 打开pdf文件

实现了在APP内部打开pdf文件，加载速度快，能够解决工作中有需要操作office的需求

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2018-05-29 09:06  assets\
     文件      312688  2017-04-28 03:41  assets\all.min.js
     目录           0  2018-05-29 09:05  assets\images\
     文件         426  2017-04-28 03:41  assets\images\annotation-check.svg
     文件         899  2017-04-28 03:41  assets\images\annotation-comment.svg
     文件        2194  2017-04-28 03:41  assets\images\annotation-help.svg
     文件         418  2017-04-28 03:41  assets\images\annotation-insert.svg
     文件        1463  2017-04-28 03:41  assets\images\annotation-key.svg
     文件         437  2017-04-28 03:41  assets\images\annotation-newparagraph.svg
     文件         165  2017-04-28 03:41  assets\images\annotation-noicon.svg
     文件        1083  2017-04-28 03:41  assets\images\annotation-note.svg
     文件        1159  2017-04-28 03:41  assets\images\annotation-paragraph.svg
     文件         199  2017-04-28 03:41  assets\images\findbarButton-next-rtl.png
     文件         304  2017-04-28 03:41  assets\images\findbarButton-next-rtl@2x.png
     文件         193  2017-04-28 03:41  assets\images\findbarButton-next.png
     文件         296  2017-04-28 03:41  assets\images\findbarButton-next@2x.png
     文件         193  2017-04-28 03:41  assets\images\findbarButton-previous-rtl.png
     文件         296  2017-04-28 03:41  assets\images\findbarButton-previous-rtl@2x.png
     文件         199  2017-04-28 03:41  assets\images\findbarButton-previous.png
     文件         304  2017-04-28 03:41  assets\images\findbarButton-previous@2x.png
     文件         326  2017-04-28 03:41  assets\images\grab.cur
     文件         326  2017-04-28 03:41  assets\images\grabbing.cur
     文件        2545  2017-04-28 03:41  assets\images\loading-icon.gif
     文件        7402  2017-04-28 03:41  assets\images\loading-small.png
     文件       16131  2017-04-28 03:41  assets\images\loading-small@2x.png
     文件         403  2017-04-28 03:41  assets\images\secondaryToolbarButton-documentProperties.png
     文件         933  2017-04-28 03:41  assets\images\secondaryToolbarButton-documentProperties@2x.png
     文件         179  2017-04-28 03:41  assets\images\secondaryToolbarButton-firstPage.png
     文件         266  2017-04-28 03:41  assets\images\secondaryToolbarButton-firstPage@2x.png
     文件         301  2017-04-28 03:41  assets\images\secondaryToolbarButton-handTool.png
     文件         583  2017-04-28 03:41  assets\images\secondaryToolbarButton-handTool@2x.png
............此处省略67个文件信息