A desktop-class text and source code editor engineered specifically for Android devices.
NoteCode++ brings the productivity and classic developer workflow of desktop code editors like Notepad++ to Android. Built 100% natively using Jetpack Compose and Material Design 3, NoteCode++ is designed for programmers, sysadmins, writers, and power users who need a robust, privacy-first code editor on phones and tablets.
- Open, edit, and switch between multiple documents seamlessly.
- Visual dirty/modified indicators (
*) and tab close affordances. - New tab creation, document renaming, and quick document switching.
- Built-in lexical syntax highlighters for 12+ programming and markup languages:
- Kotlin, Java, Python, JavaScript, TypeScript, C, C++, HTML, CSS, JSON, Markdown, XML, SQL, Shell, Plain Text.
- 8 Themes including:
- Notepad++ Classic
- Modern Dark
- Monokai
- Dracula
- Solarized Dark
- Solarized Light
- Nord
- GitHub Light
- Uses Android's Storage Access Framework (SAF) to open and save files from:
- Internal device storage
- MicroSD cards
- USB OTG drives
- Cloud storage providers (Google Drive, Nextcloud, OneDrive)
- Two-Finger Pinch Gestures: Smoothly pinch-in to decrease or pinch-out to increase editor text size dynamically (8sp to 36sp).
- Interactive HUD Overlay: Displays live font size and scale percentage with a one-tap Reset button to return to 100% (14sp).
- Dynamic Gutter & Alignment: Line number gutter and code canvas scale in exact lockstep without clipping or cursor jitter.
- Status Bar Zoom Pill: Quick at-a-glance zoom indicator in the status bar with tap-to-reset.
- Fast in-editor search with real-time match highlighting.
- Next / Previous match navigation.
- Match Case (case-sensitive), Whole Word, and Regex (Regular Expression) search support.
- One-by-one or replace-all operations.
- Sort Lines: Sort selected or document lines ascending (A-Z) or descending (Z-A).
- Remove Duplicate Lines: Instant deduplication for lists and configs.
- Trim Whitespace: Clean leading and trailing spaces across all lines.
- Join Lines / Reverse Lines: Invert or collapse text structures.
- Line Operations: Duplicate line, delete line, toggle comment syntax, and insert timestamps.
- Bookmarks: Set line bookmarks, jump between next/previous bookmarks, and clear all.
- Go to Line: Instant navigation to any line number.
- Case Conversion: UPPERCASE, lowercase, Title Case, camelCase, snake_case, and kebab-case.
- Real-time status bar showing cursor line, column number, character selection length, total characters, and line count.
- Detailed Document Statistics Dialog: word count, character count (with and without whitespace), and formatted file size in bytes/KB/MB.
- Line ending detection and switching: Unix (LF) vs. Windows (CRLF).
- Character encoding handling: UTF-8 and ANSI (Windows-1252).
- Built-in previewer to render Markdown and live HTML/CSS output directly inside the app.
- Built-in Termux Runner: Execute Node.js, npm, and pnpm workflows directly from NoteCode++.
- Dual Execution Modes:
- Embedded App Console: Run commands in the background (
pnpm install,npm run build,npm test) with real-time stdout, stderr, and exit codes streamed directly into NoteCode++'s dark terminal console. - Interactive Termux Session: Launch into the full Termux terminal emulator for interactive dev servers (such as
pnpm dev,vite,next dev, or interactive CLIs) with hot-reloading and full TTY keyboard control.
- Embedded App Console: Run commands in the background (
- Smart
package.jsonDetection: Automatically inspects openpackage.jsonfiles and creates 1-tap quick buttons for all detected scripts (dev,build,test,start,lint). - Quick Command Presets: Instant runners for
pnpm dev,npm run dev,pnpm install,npm install,pnpm build,npm test, andnode (current file). - Custom Working Directory: Easily set the working directory to Termux home (
~), project folders (~/my-app), or external storage (/sdcard/Download). - Integrated Setup & Diagnostics: 4-step interactive wizard explaining how to install Termux from F-Droid, grant the
RUN_COMMANDpermission, enableallow-external-apps = true, and install Node.js LTS and pnpm.
- Zero telemetry, zero analytics tracking, and zero advertising SDKs.
- Operates entirely locally on your device with no required account or subscription paywall.
Both compiled Release and Debug APKs are provided directly in this repository:
| Build Variant | File | Size | Notes |
|---|---|---|---|
| Release APK | apk/notecode-plus-plus-release.apk |
~16 MB | Recommended. Optimized, stripped symbols, fast startup |
| Debug APK | apk/notecode-plus-plus-debug.apk |
~22 MB | Development build with debug instrumentation |
- Download
notecode-plus-plus-release.apkdirectly to your Android device or clone this repo. - In Android Settings, ensure Install unknown apps is permitted for your browser or file manager.
- Tap the downloaded
.apkfile and select Install.
Alternatively, install via ADB:
adb install apk/notecode-plus-plus-release.apk- Language: Kotlin (100%)
- UI Framework: Jetpack Compose with Material Design 3
- Local Persistence: Room SQLite database for tab restoration and document caching
- Architecture: MVVM (Model-View-ViewModel) + Unidirectional Data Flow (UDF)
- Asynchronous Flow: Kotlin Coroutines &
StateFlow - File Access: Android Storage Access Framework (SAF)
OpenDocument&CreateDocument - Build System: Gradle with Kotlin DSL (
build.gradle.kts) and Version Catalogs (libs.versions.toml) - Branding & Assets: Custom adaptive launcher icon featuring the iconic chameleon notebook with centered Android robot insignia
- Android Studio: Ladybug / Meerkat or newer
- JDK: Version 17+
- Android SDK: Compile SDK 36, Min SDK 24
# Clone the repository
git clone https://github.com/your-username/notecode-android.git
cd notecode-android
# Build Release APK
./gradlew assembleRelease
# The Release APK will be generated at:
# app/build/outputs/apk/release/app-release.apk
# Build Debug APK
./gradlew assembleDebug├── apk/
│ ├── notecode-plus-plus-release.apk # Production-optimized ready-to-install APK (~16MB)
│ └── notecode-plus-plus-debug.apk # Debug variant APK
├── app/
│ ├── src/main/
│ │ ├── java/com/example/
│ │ │ ├── data/ # Room database, DAO, entities & repositories
│ │ │ ├── termux/ # Termux RUN_COMMAND bridge, intent receivers & models
│ │ │ ├── ui/
│ │ │ │ ├── components/ # Canvas, Toolbars, Termux Drawer, Dialogs & Status Bar
│ │ │ │ ├── screen/ # Main NotepadScreen Compose view
│ │ │ │ ├── syntax/ # Lexer & Syntax Highlighter engine
│ │ │ │ ├── theme/ # Editor theme palettes & M3 theming
│ │ │ │ └── viewmodel/ # EditorViewModel & state managers
│ │ │ └── MainActivity.kt # Main single-activity entry point
│ │ └── res/ # Vector assets, launcher icons, drawables, strings
│ └── build.gradle.kts
├── gradle/
│ └── libs.versions.toml # Gradle Version Catalog
└── README.md
NoteCode++ is and will always remain 100% free, open-source, offline, and privacy-first with zero ads, zero trackers, and zero paywalls.
If NoteCode++ boosts your mobile programming productivity or helps you maintain projects on Android, please consider supporting development!
| Platform | Link / Account | Description |
|---|---|---|
| ☕ Buy Me a Coffee | buymeacoffee.com/devsideofmine |
Quick 1-click tips & coffee sponsorships (@devsideofmine) |
| 💖 GitHub Sponsors | github.com/sponsors/knewnothing-git |
Direct sponsorship on GitHub (@knewnothing-git) |
<iframe src="https://github.com/sponsors/knewnothing-git/button" title="Sponsor knewnothing-git" height="32" width="114" style="border: 0; border-radius: 6px;"></iframe>
Note: In the app, you can tap the Support NoteCode++ button (golden volunteer activism icon) located in the top header right next to the new file (
+) button to open the interactive Support & Sponsor Dialog at any time!
This project is open-source under the Apache 2.0 License. Feel free to fork, contribute, and adapt it for your own developer tool needs!