一款名为Gander的Android应用在Hacker News亮相，这是一款文件查看器，特别之处在于它不申请任何权限，甚至包括互联网权限1。该应用支持PDF、Word、Excel、PowerPoint、图片、视频、音频、Markdown和代码文件的查看1。
Gander的体积仅为14 MB1，采用MIT许可证在Github上开源1。在技术实现方面，应用使用Pdfium库处理PDF文件，借助Media3库处理媒体文件，而Office格式文档则通过WebView中的JavaScript库进行渲染1。应用存在一些限制：复杂的PowerPoint演示文稿渲染不完全，电子表格的图表不会绘制，同时不支持旧版二进制格式的.doc和.ppt文件1。
A developer has unveiled Gander, an Android file viewing application that operates without requesting any permissions from users, including internet access 1. The lightweight app, which weighs just 14 MB, supports a comprehensive range of file formats including PDF, Word, Excel, PowerPoint, images, video, audio, Markdown, and code files 1.
The application is built using a combination of technologies to handle different file types: Pdfium for PDF rendering, Media3 for media playback, and JavaScript libraries within WebView for rendering Office formats 1. Gander is released under the MIT license and is available as open-source code on Github 1. However, the app does have some limitations—complex PowerPoint presentations may not render completely, spreadsheet charts are not drawn, and legacy binary formats such as .doc and .ppt files are not supported 1.
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