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Architecting a Low-Power Geofencing Engine for Android

DEV Community: kotlin·Haseeb·about 18 hours ago
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Opening hook

The silence in the mosque was absolute, broken only by the rhythmic recitation of the imam. I was in the middle of a prayer, my head bowed, when a sudden, aggressive vibration rattled against the marble floor. It was my phone. My heart sank. I felt every eye in the room shift toward me. It was not just a notification; it was an interruption of a moment that demanded total focus. I had forgotten to silence my device again, and that single mistake turned a moment of peace into a source of public embarrassment.

The problem

We live in an age of constant connectivity, yet our devices remain remarkably unintelligent when it comes to context. I constantly found myself in meetings, classes, or prayer halls where a ringing phone was unacceptable. The standard Android "Do Not Disturb" features were either too manual or too rigid. I tried scheduling them, but my schedule is never static. If a meeting ran late or a prayer time shifted by a few minutes, the pre-set timers were useless.…

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