An Android application for peer-to-peer communication between devices.
| Category | Technologies |
|---|---|
| Platform | Android (API 21+) |
| Language | Java, Kotlin, C++ |
| Native | JNI, CMake, OpenGL ES |
| Network | UDP, TCP, KCP |
| Media | Audio Recording, Video Encode/Decode |
| Build | Gradle, CMake, NDK |
app/src/main/
├── java/com/tsymiar/device2device/
│ ├── activity/ # Activity components
│ │ ├── MainActivity # Main entry point
│ │ ├── TextureActivity # Image/Video encode/decode
│ │ ├── WaveActivity # Audio recording & waveform
│ │ └── GraphActivity # Sensor chart display
│ ├── service/ # Background services
│ │ ├── FloatingService # Floating window
│ │ └── PublishDialog # Message publishing
│ ├── acceleration/ # Sensor & Voice modules
│ │ ├── Sensor/ # Sensor data collection
│ │ └── Voice/ # Voice processing
│ ├── dialog/ # UI dialogs
│ ├── entity/ # Data entities
│ ├── event/ # Event handling
│ ├── utils/ # Utilities
│ ├── view/ # Custom views
│ └── wrapper/ # Native bridge wrappers
├── cpp/ # Native C++ code
│ ├── bitmap/ # Bitmap processing
│ ├── callback/ # JNI callbacks
│ ├── convert/ # PCM↔WAV, YUV↔RGB
│ ├── display/ # Display rendering
│ ├── message/ # Message queue
│ ├── socket/ # UDP/TCP/KCP sockets
│ ├── scadup/ # Message queue lib
│ └── time/ # Time utilities
└── res/ # Android resources
| Feature | Description |
|---|---|
| TEXTURE | Image/Video encode/decode test with CPU/GPU rendering and OpenGL |
| WAVE | Record audio and draw real-time waveforms |
| CHART | Display sensor data in line charts |
| Feature | Description |
|---|---|
| SERVER | Start a UDP server to receive data |
| CLIENT | Start a UDP client to send data |
| TCP | Start a TCP server to receive data |
| KCP | Test KCP (Reliable UDP) protocol |
| SUBSCRIBE | Subscribe to messages from broker via float window |
| PUBLISH | Publish messages to subscribers via broker |
| Feature | Description |
|---|---|
| EVENT | Update and broadcast event values |
| TIME | Update and synchronize timestamps |
- Android SDK 31
- Android NDK 23.0.7599858
- Build Tools 30.0.3
- Gradle 7.x
- CMake 3.18+
android.permission.BLUETOOTH_CONNECT
android.permission.WRITE_EXTERNAL_STORAGE
android.permission.READ_EXTERNAL_STORAGE
android.permission.RECORD_AUDIO
android.permission.INTERNET
android.permission.ACCESS_WIFI_STATE
android.permission.CHANGE_WIFI_MULTICAST_STATE
android.permission.SYSTEM_ALERT_WINDOW
android.permission.ACCESS_NETWORK_STATE
android.permission.READ_PHONE_STATE
android.permission.HIGH_SAMPLING_RATE_SENSORS./gradlew assembleDebug
# or
./build.sh
MIT License