A GPS map camera for site visits, field work, deliveries and events. Every photo and video is stamped with where and when it was taken: a satellite mini map with a pin, the place name, the full address with a plus code, the coordinates, the date and time, and your own company logo, event name and note.
This is the native Kotlin + Jetpack Compose edition. A Flutter edition with a bundled offline geocoder for India lives at GPSCamera_INDIA_Offline.
Get the latest APK from Releases (Android 8.0 or newer).
- Photo and video modes with a live stamp preview over the camera, front/back lens and flash (a steady torch while recording video).
- Rich location stamp: satellite mini map, place title (e.g. Atrakhi, West Bengal, India), full address with plus code (8F3P+JRG, Atrakhi, West Bengal 721149, India), latitude/longitude, and the date and time with time zone.
- Your branding on every capture: company name and logo, an event badge in the top-left corner, and a free-text note. You set them on first launch and can change them any time.
- Stamped videos: the stamp updates while you record (each new minute, or when the address arrives) and is burned into the frames on the device.
- Proper metadata: GPS is written to the photo's EXIF tags and to the MP4 location atom.
- Keep shooting: captures are processed in a background queue, one after another.
- Built-in gallery with a grid and a swipeable full-screen viewer, share and delete. Every capture is also saved to the phone's gallery in the Your GPS Camera album.
- No ads, no accounts.
| Piece | Implementation |
|---|---|
| Camera | CameraX: photos up to 12 MP, video at 1080p |
| Location | Google Play services' fused location provider, with plain GPS as a fallback on phones without Play services |
| Address | Android's built-in Geocoder, falling back to OpenStreetMap Nominatim (rate-limited, only queried after moving 40 m or more) |
| Plus code | Open Location Code encoder implemented from the open specification, using exact integer arithmetic |
| Mini map | Esri World Imagery tiles stitched into one square, centred on the position (Web Mercator) |
| Video stamp | Media3 Transformer overlays the stamp images onto the video frames, entirely on-device |
| Stamp drawing | One drawing routine paints both the live preview and the stamp burned into photos and videos |
app/src/main/java/com/bbcl/gpscamera/
├── MainActivity.kt Entry point
├── CameraScreen.kt Camera preview, live stamp, capture controls
├── CameraModel.kt CameraX binding, stamp state, background capture queue
├── LocationTracker.kt Fused / GPS location updates
├── Address.kt Geocoder + Nominatim reverse geocoding
├── PlusCode.kt Open Location Code encoder
├── MiniMap.kt Satellite tile stitching
├── Stamp.kt Stamp layout and drawing
├── VideoStamper.kt Media3 Transformer overlay pipeline
├── Media.kt Final photo/video output, EXIF, gallery export
├── Brand.kt Company / event / note / logo storage
├── BrandDialog.kt Branding editor
└── GalleryScreen.kt In-app gallery and viewer
- Kotlin 2.4, Jetpack Compose (Material 3), Coroutines
- CameraX (camera2, video, view), Media3 Transformer and Effect
- Google Play services Location, AndroidX ExifInterface
- Min SDK 26 (Android 8.0), target SDK 36
| Permission | Why |
|---|---|
CAMERA |
Taking photos and videos |
ACCESS_FINE_LOCATION / ACCESS_COARSE_LOCATION |
The position on the stamp |
RECORD_AUDIO |
Sound in videos |
INTERNET |
Address lookup and satellite map tiles (the stamp still shows coordinates offline) |
WRITE_EXTERNAL_STORAGE (Android 9 and lower) |
Saving to the gallery |
Requirements: Android Studio (or the Android SDK with platform 36) and JDK 17+.
git clone https://github.com/souvik-das-tech/GPSCamera-Android.git
cd GPSCamera-Android
./gradlew assembleRelease # app/build/outputs/apk/release/app-release.apk (R8-minified)
./gradlew installDebug # install a debug build on a connected deviceThe release build is signed with the debug key so it installs out of the box. Add your own
signingConfig before publishing to a store.
Satellite imagery © Esri and its data providers. Addresses © OpenStreetMap contributors (ODbL) via Nominatim.
Released under the MIT License.
Souvik Das · GitHub @souvik-das-tech
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