Secure image/pdf/text viewer

Yury Dubinsky

About this app

Many of us store various documents and photocopies on our phones. These could be copies of auto insurance policies, photo IDs, various confirmation letters, airport boarding passes, etc. Sometimes we need to show the document to another person, such as office workers, police officers. or airport staff. We give them the phone. But it's risky when the phone remains unlocked. The person holding your phone can gain unauthorized access to your phone. Android supports pinning application screens. No one other than the phone owner can exit the pinned app. However, for security purposes, a pinned app should not allow third parties to access your contacts, your device's storage, etc. The problem with existing image, text, and PDF viewers for Android is that most apps support file sharing, and even in pinned mode, others can access your contacts list and internal storage.
This application is designed to quickly pin the screen, which is easier than the standard Android pinning. At the same time, the application guarantees that after pinning, third parties will only be able to access the current document and nothing else.
The viewer opens the following contents: text files, images (JPG, PNG and GIF formats), videos (MP4 format), and PDF documents.
Text files, images and videos are opened with the standard Android HTML viewer. PDF documents are open with the simplified internal PDF viewer.
Author: Yury Dubinsky ( [e-mail] )
History:
Version: 1.0 (2019). Initial
Version: 2.0 (Sep 11, 2024 ). In this version the viewer was added to "Open With" application list for all supported file types. Plus user interface improvement.
Version: 2.0.1 (Sep 18,2024). Added audio files and user warning related to a system bug when a document is open via selecting Download document provider in the "Open From" dialog. See "Tips for using"
This viewer is free and open source. https://github.com/dyura/TextImageviewer
Tips for using https://sites.google.com/view/tips-for-using-secure-viewer/home