Simple Reader - Lightweight Offline Document Viewer

Đọc tài liệu này bằng Tiếng Việt

A strictly privacy-focused, ultra-lightweight document reader for Android 13+.

Why Simple Reader?

In a world of bloated apps filled with ads and tracking, Simple Reader offers a clean alternative. It is designed for users who value privacy, speed, and device storage.

1. Minimal App Size

Unlike other viewers that bundle heavy rendering engines (often adding 30-50MB), Simple Reader uses Android's native APIs and a highly optimized parsing logic. The result is an app that takes up negligible space on your phone.

2. Truly Private & Secure

• No Internet Permission: The app cannot connect to the internet. Your documents never leave your device.
• No Analytics: We do not track usage or collect data.
• Sandboxed Rendering: Documents are processed in a secure environment. Office files are converted to safe HTML, stripping potential malicious scripts.

3. Native "Open With" Integration

The app integrates directly with your system's file manager. You don't need to open the app first; just tap your file in "Downloads" or "Files" and select Simple Reader.

4. Modern & Intuitive Design

A completely redesigned home screen featuring smooth animations, gradient aesthetics, and quick access shortcuts, all while maintaining the app's lightweight nature.

Supported Formats

• PDF (.pdf): High-performance rendering using Android's built-in PDF engine. Supports pinch-to-zoom and page virtualization.
• Word (.docx, .doc): content is parsed and formatted for readability on mobile screens.
• Excel (.xlsx, .xls): Spreadsheets are rendered with tab navigation for multiple sheets.

Technical Highlights

For developers interested in the implementation:

• Language: 100% Kotlin.
• UI: Jetpack Compose (Material 3) with custom animations and dynamic gradient themes.
• Architecture: MVVM / Clean Architecture.
• PDF: Implemented via android.graphics.pdf.PdfRenderer with Bitmap recycling and LruCache for memory efficiency.
• Office: Uses a ProGuard-stripped version of Apache POI. Complex binaries are parsed to HTML/CSS for rendering in a restricted WebView.
• Storage: Fully compliant with Android 13 Scoped Storage (no overly broad MANAGE_EXTERNAL_STORAGE permission needed).

Requirements

• Modern Version: Android 13 (API Level 33) or higher.
• Legacy Version: Android 8.0 (API Level 26) or higher.