HST Calculator App

Clean utility calculator app built in Android Studio

Release Version: V1.0.0Target SDK: Android version 8 and above

Android StudioJavaXML UI

Executive Summary & Problem Statement

Currently being developed in Android Studio to practice native UI layouts, event handling, and mathematical expression parsing.

System Architecture & Engineering Approach

Designed for optimal type safety, modular maintainability, and client responsiveness. Utilizes clean code patterns, reactive state synchronization, and strict input validation.

Architectural Pillars:

Decoupled client state and modular components.
Pre-confirmation validation & error prevention routines.
Optimized rendering and mobile responsive interface design.

Key System Features Breakdown

Community Reactions

HST Calculator App

... Likes•... Comments

Comments

Displaying 0 published comments (Max 15)

No published comments yet.

Be the first to leave a comment! Your comment will appear after admin review.

Standard arithmetic calculations
Calculation history log
Responsive layout for phone viewports

Challenges Encountered

• Handling operator precedence in complex mathematical expressions.

Engineered Solutions

• Implementing Dijkstra's Shunting-yard algorithm for expression evaluation.

Interface Gallery

View Full Image

Screenshot_20260808_143628_HST Calculator

System Interface Screen

View Full Image

Screenshot_20260808_143637_HST Calculator

System Interface Screen

Technologies & Tools Used

Android StudioJavaXML UI

Future Roadmap

Planned Enhancements

• Automated end-to-end telemetry testing.
• Real-time WebSocket synchronization improvements.