Camera2 API: Handling Orientation, Focus, and Exposure in Background — How to Keep Your Android Camera Running With the Screen Off
The article discusses how to maintain an Android camera session while the screen is off. It highlights the challenges posed by various power management systems that can interrupt camera functionality. Solutions are provided for handling orientation, focus, and exposure during long recordings.
- ▪The Camera2 API can stop functioning when the screen is locked due to power management systems.
- ▪Four overlapping systems affect camera operation: foreground-service lifecycle, Doze mode, App Standby Buckets, and OEM-specific battery optimizers.
- ▪Developers must implement specific strategies to keep the camera session alive, including using the correct foreground-service type and managing user settings.
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try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3905292) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } Super Funicular Posted on May 26 Camera2 API: Handling Orientation, Focus, and Exposure in Background — How to Keep Your Android Camera Running With the Screen Off #android #kotlin #privacy #mobile Originally answered on Quora: "How do you record a video with the screen off in Android?". This is the dev.to canonical — the long, code-level version of the same architecture, written for developers shipping a camera-adjacent Android app.
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