There is no API built into Android for reading Microsoft documents.
I would estimate implementing what you seek to take over 100 engineer-months. There are only a few apps ever written that can display Word documents, and only 2-3 of these have been ported to Android.
I would recommend you do a server-side conversion of the Word document to HTML, then display it in a WebView
widget, if you want something that takes less engineering time to implement.
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