SG EV Charging — Android

Find nearby EV charging points in Singapore with live availability from LTA DataMall.

Report Bug · Request Feature

Screenshots

About

SG EV Charging (Android) is a native Kotlin / Jetpack Compose app for locating electric vehicle charging points around Singapore. It is a feature parity port of the SwiftUI iOS app, combining Google Maps location search, current-location detection, and LTA DataMall EV charging data to show nearby stations, available plugs, operators, charging speeds, and driving directions in Google Maps.

Key features:

• Search by Singapore postal code or place name.
• Detect the user's current location and rank charging points by distance.
• Display available, occupied, and unavailable connector states.
• Show operator, plug type, power rating, and last-updated metadata.
• Open turn-by-turn directions in Google Maps.
• Map-first interface with nearby charging chips for quick station switching.
• Bottom navigation with Map, Feedback (send a message via WhatsApp), and About tabs.
• In-app attribution linking the official LTA DataMall government data source.

Tech Stack

Layer	Technology
App	Kotlin 2.0, Jetpack Compose, Material 3
Maps & Location	Google Maps Compose, Fused Location Provider, platform Geocoder
Data	LTA DataMall EVChargingPoints and EVCBatch APIs (OkHttp + org.json)
Build	Android Gradle Plugin 8.7, Gradle 8.11, JDK 17
Platform	Android 7.0+ (minSdk 24, target/compileSdk 35), phones

Architecture

SG EV Charging (Android)
├── Compose UI
│   ├── SGEVChargingScreen        (map + search + result card + chips)
│   └── ui/theme/Theme.kt
├── State
│   └── ChargingSearchViewModel   (AndroidViewModel)
├── Location
│   ├── UserLocationProvider      (FusedLocationProviderClient)
│   └── LocationSearchService     (Geocoder)
├── Data Access
│   └── LTADataMallClient         (OkHttp)
└── Models
    ├── EVChargingLocation
    ├── ChargingPoint
    ├── PlugType
    └── EVConnector

Project Structure

.
├── app
│   ├── src/main
│   │   ├── java/com/alfredang/sgevcharging
│   │   │   ├── MainActivity.kt
│   │   │   ├── SGEVChargingApp.kt
│   │   │   ├── ChargingSearchViewModel.kt
│   │   │   ├── data/Models.kt
│   │   │   ├── data/LTADataMallClient.kt
│   │   │   ├── location/UserLocationProvider.kt
│   │   │   ├── location/LocationSearchService.kt
│   │   │   └── ui/SGEVChargingScreen.kt
│   │   ├── res
│   │   └── AndroidManifest.xml
│   └── build.gradle.kts
├── gradle/libs.versions.toml
├── settings.gradle.kts
└── README.md

Getting Started

Prerequisites

• Android Studio Ladybug (or newer) with JDK 17.
• Android SDK Platform 35 and build-tools.
• A Google Maps Android SDK API key — https://console.cloud.google.com/google/maps-apis.
• An LTA DataMall account key — https://datamall.lta.gov.sg/.

Setup

1. Clone the repository:

   git clone https://github.com/alfredang/sgevchargingapp_android.git
   cd sgevchargingapp_android

2. Add your keys to local.properties (this file is git-ignored):

   sdk.dir=/path/to/Android/sdk
   MAPS_API_KEY=your_google_maps_android_key
   LTA_DATAMALL_ACCOUNT_KEY=your_lta_datamall_key

   MAPS_API_KEY is injected into the manifest meta-data; LTA_DATAMALL_ACCOUNT_KEY is surfaced as BuildConfig.LTA_DATAMALL_ACCOUNT_KEY.

3. Build and run:

   ./gradlew :app:assembleDebug      # debug APK
   ./gradlew :app:bundleRelease      # signed release AAB (needs RELEASE_* keys)

Data Source

The app uses Singapore Land Transport Authority DataMall APIs:

• EVChargingPoints for postal-code scoped charging data.
• EVCBatch for island-wide batch data (returns a download link to the full dataset).

API credentials are intentionally excluded from Git. local.properties is ignored by .gitignore.

License

No license has been specified yet.

Developed By

Tertiary Infotech Academy Pte. Ltd.