I want to display PDF,PPT, EXCEL, WORD documents with in my application. The files are already stored in sdcard and I want to open these docs even if there is no internet connection.I want to display PDF,PPT, EXCEL, WORD document
阅读背景：
如何在没有互联网的Android应用程序中显示ppt，pdf等文档
来源：互联网
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