Developer Builds Low-Power Android Geofencing Engine to Auto-Manage Sound Profiles

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A developer has detailed the creation of 'Muffle', an Android app that automatically adjusts sound profiles based on the user's physical location. The project was motivated by the cognitive burden of manually managing device notifications across different contexts such as meetings, prayer, and study sessions. Rather than using battery-draining GPS polling, the app leverages Android's GeofencingClient from Google Play Services, which offloads proximity detection to hardware-level system services. The app uses a PendingIntent and BroadcastReceiver pattern, allowing it to remain dormant until a geofence transition is detected, then triggering the AudioManager to adjust volume. A minimum geofence radius of 100 meters was set to prevent erratic toggling caused by GPS drift, though OEM inconsistencies across Android devices posed additional development challenges.

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Developer Builds Spider-Man-Themed Portfolio Site Inspired by Peter Parker's Curiosity

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

Tim King, Creator of Tripos OS That Powered the Amiga, Dies at 78

Tim King, a British computer scientist who built the operating system at the heart of the Commodore Amiga, passed away in 2026 at the age of 78. As a Cambridge PhD student in the late 1970s, King developed Tripos, a preemptive multitasking OS written in BCPL, which became the foundation of AmigaDOS when Commodore adopted it for the Amiga's 1985 launch. The Amiga's ability to multitask years before Windows or Mac OS was largely due to the maturity of King's earlier work. After his time at MetaComCo in Bristol, King founded Perihelion in 1986 to work on parallel computing and the Helios OS, and later established UK Online, one of Britain's earliest internet service providers. His career spanned three defining decades of computing, leaving a lasting mark on operating systems, personal computing, and early consumer internet.

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