Offline voice input plugin for LeanType Keyboard.
This plugin provides fast, on-device offline speech-to-text capabilities using whisper.cpp for the LeanType Keyboard via an IPC AIDL contract (IVoiceEngine).
- Engine: Whisper.cpp with ARM64 NEON optimizations & JNI bridge
- AIDL Interface:
com.leanbitlab.leantype.voice.IVoiceEngine - Service Action:
com.leanbitlab.leantype.voice.offline.ENGINE
- 🎙️ 100% On-Device Speech Recognition: Fast, private speech-to-text powered by
whisper.cppwith ARM NEON acceleration. - 🌍 99+ Languages Supported: Multi-lingual transcription with auto-detection and language-specific Whisper models.
- 🛡️ Complete Privacy & Zero Internet: Speech audio never leaves your device. Operates 100% offline.
- ⚡ Real-Time Audio Visualizer: Live waveform visualization, silence threshold sliders, and background keep-alive.
- 🔄 Universal Compatibility: Compatible across all 4 LeanType flavors (
Standard Full,Standard,Offline, andOffline Lite).
- Operating System: Android 5.0 (API 21) or higher
- Supported CPU Architectures:
arm64-v8a,armeabi-v7a,x86_64 - Host Keyboard: LeanType v4.1.0+ (All flavors)
- Permissions: Microphone permission (
RECORD_AUDIO)
- Download the latest release APK (
voice_plugin-arm64-v8a.apk,voice_plugin-armeabi-v7a.apk, or universal) from GitHub Releases. - Install the APK on your Android device (Unlike dynamic plugin libraries, the Voice Plugin runs as an IPC AIDL service and is installed as an app).
- Grant Microphone permission when prompted (or in Android Settings → Apps → LeanType Voice Plugin → Permissions).
- Open LeanType keyboard settings.
- Navigate to Settings → Voice typing (or Settings → Plugins → Voice).
- Tap Whisper Speech Models:
- Online Flavors (
Standard/Standard Full): Download models directly inside the app with 1 tap. - Offline Flavors (
Offline/Offline Lite): Download.binmodels in your browser and use Import Model to select them from device storage.
- Online Flavors (
| Model | Size | Speed | RAM Usage | Best For |
|---|---|---|---|---|
ggml-tiny.bin |
~39 MB | ⚡ Ultra-Fast | ~150 MB | Low-end devices & quick voice typing |
ggml-base.bin (Recommended) |
~74 MB | ⚡ Fast | ~250 MB | Best balance of accuracy & speed |
ggml-small.bin |
~244 MB | 🟡 Moderate | ~600 MB | High accuracy on modern devices |
- Bring up LeanType keyboard in any text field.
- Tap the Microphone icon on the keyboard toolbar.
- Speak clearly — text will stream directly into the active input field!
./gradlew assembleDebug
Licensed under the GNU General Public License v3.0.
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