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CDroid is an open-source, Android-compatible GUI framework built on C++11, designed for cross-platform embedded systems development.it is more friendly for android developers.

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# CDroid

> **Android's UI framework, faithfully ported to C++ — Android-quality UI on embedded devices with no Android runtime, and a readable mirror of AOSP internals you can actually learn from.**

CDroid is a **line-by-line C++ port of Android's Java UI SDK** — `android.widget`, `android.view`, `android.text`, `android.graphics.drawable`, `android.animation` — built on top of **Cairo** (vector graphics) and targeting **embedded systems** (runs in as little as 32 MB of RAM). It is neither a wrapper around Android nor merely "Android-inspired": class names, member names, method signatures, and control flow track the AOSP sources closely enough that you can open the Android reference next to the C++ and follow along line by line.

If you can describe a UI in Android XML, you can run that same UI on a set-top box, an in-dash display, or an industrial panel — designed in Android Studio, rendered by Cairo, no JVM in sight.

* Main repository: [https://gitee.com/houstudio/cdroid](https://gitee.com/houstudio/cdroid)
* Mirror: [https://github.com/houstudio/cdroid](https://github.com/houstudio/cdroid)
* Contact: QQ 1225012331 / WeChat: calfhou

## Why does this exist?

Embedded teams keep reinventing UI frameworks, and the results are rarely as good as Android's. CDroid takes the other route: **port the real thing**, preserve a decade of Android UI engineering, and ship it where Android itself can't run. The guiding rule is *fidelity over redesign* — translate Android's logic verbatim instead of second-guessing it. (See [AGENTS.md](AGENTS.md).)

## Who is it for?

- **Embedded engineers** who need a polished, animatable, Material-style UI on constrained hardware (32 MB+) where full Android is too heavy.
- **Android developers** who want to understand *how the framework actually works* — View measure/layout/draw, Choreographer, input dispatch, text layout, drawables — by reading clean C++ instead of fighting the AOSP build. CDroid is the most readable mirror of AOSP framework internals that exists.
- **C++ engineers** looking for a substantial, well-architected codebase: real ownership/lifetime challenges, modern features (ConstraintLayout/MotionLayout, RecyclerView, fragments, transitions), and Cairo-based rendering.

## Features

- **50+ widgets & 20+ drawables**, API-compatible with Android — design them in Android Studio / Eclipse.
- **Full AndroidX ports:** RecyclerView, ConstraintLayout + MotionLayout, FragmentManager + Navigation, Flexbox, CoordinatorLayout, ViewPager2.
- **Fragment + Transition framework**, including shared-element transitions.
- **Vector graphics via Cairo** — no `Bitmap` class; `Cairo::ImageSurface` plays that role.
- **Multi-window / multi-layer compositor** with damage-region rendering.
- **Faithful text stack:** spans, `StaticLayout`/`DynamicLayout`, minikin line-breaking, `KeyCharacterMap`, IME.
- **Cross-platform backends:** DRM, fb, DirectFB, SDL, XCB/Xlib, VNC.

## Get involved 👋

CDroid is a large port — there is always more to translate from AOSP, and we'd love your help.

- 🆕 **[Good First Issues](docs/contributing/good-first-issues.md)** — concrete, self-contained tasks, each pointing to the exact AOSP source to port.
- 📖 **[Contributing guide](CONTRIBUTING.md)** — how to build, the fidelity methodology, and how to claim your first task.
- 中文说明见 [README.cn.md](README.cn.md).

# **Quick Start**
* VM(Ware):https://pan.baidu.com/s/1-v-rLcHxo5W5TXvJ2NUWxA fetchcode：spux (VM Ubuntu User:cdroid password:123456）
* After login pls run git pull to get new version of cdroid
* You'd better remove outXXX and run build.sh to rebuild makefiles after each git pull.
# **IDE(AndroidStudio/Eclipse)** 
![IDE](https://gitee.com/jiangcheng/cdroidX64/raw/master/apps/images/asd61236_ide.png)

# **ScreenShots**
![demo0](https://gitee.com/jiangcheng/cdroidX64/raw/master/apps/images/asd61236.gif)
![输入图片说明](https://foruda.gitee.com/images/1696897258873801535/181bd53c_8310459.png "coffee1.png")
![输入图片说明](https://foruda.gitee.com/images/1696897274979265997/cb22d7c6_8310459.png "coffee2.png")
![输入图片说明](https://foruda.gitee.com/images/1696897128191287720/7754542e_8310459.png "kdz10.png")
![输入图片说明](https://foruda.gitee.com/images/1696897669710472636/454e7f63_8310459.png "asd1.png")
![输入图片说明](https://foruda.gitee.com/images/1696897695571432137/8f6d2169_8310459.png "asd2.png")
![输入图片说明](https://foruda.gitee.com/images/1696897705672262478/c8736598_8310459.png "asd3.png")
![输入图片说明](https://foruda.gitee.com/images/1696897716776731960/47e420c7_8310459.png "asd4.png")
![Pott](https://gitee.com/houstudio/cdroid/raw/master/docs/images/screenshots/plot.png)

|  View         |      TextView      |  Button            |  ImageView    |  ImageButton  |
|---------------|--------------------|--------------------|---------------|---------------|
|CompoundButton |    ToggleButton    |     CheckBox       | RadioButton   |  ProgressBar  |
|   SeekBar     |   Chronometer      |    AnalogClock     |   ViewGroup   |  RadioGroup   |
|  ScrollView   |    ViewPager       |  SimpleMonthView   |    Switch     |   RatingBar   |
| NumberPicker  |     ListView       |     GridView       | RecyclerView  |  ViewFlipper  |
| ViewAnimator  |AdapterViewAnimator |    Calendarview    |SimpleMonthView| Chronometer   |
|  ScrollView   | NestedScrollView   |HorizontalScrollView| DateTimeView  |   ViewPager2  |
|YearPickerView |WearableRecyclerView|      Toolbar       |  QRCodeView   |   CardView    |

# **Supported Layouts:**
|   FrameLayout   |  LinearLayout  | RelativeLayout |     TableRow     |   DrawerLayout    |
|-----------------|----------------|----------------|------------------|-------------------|
|   TableLayout   | AbsoluteLayout |  GridLayout    |GestureOverlayView| CoordinatorLayout |
| ConstrainLayout |  MotionLayout  |  FlexboxLayout |                  |                   |
# **Supported Drawables:**
|   ColorDrawable   |  BitmapDrawable  |    NinepatchDrawable     |  InsetDrawable  |
|-------------------|------------------|--------------------------|-----------------|
|ShapeDrawable      |TransitionDrawable|  AnimatedVectorDrawable  |StateListDrawable|
| LevelListDrawable |   ClipDrawable   |  AnimatedRotateDrawable  | RotateDrawable  |
|GradientDrawable   |  ScaleDrawable   |  AnimatedImageDrawable   | VectorDrawable  |
|  RippleDrawable   |AnimationDrawable |AnimatedStateListDrawable |  LayerDrawable  |
|   BadgeDrawable   | PictureDrawable  |AnimationScaleListDrawable| RippleDrawable  |
# **Porting guide:**

* 1 A new product porting should be placed to src/porting/xxx(where xxx is you chipset name)
* 2 implement your porting api to xxx directory
* 3 modify build.sh to support your port(you should configure sysroot toolchain...).
* 4 call build.sh --product=xxx
* 5 make you project(SeeAlso **Building CDROID**)

# **Building CDROID:**
### 1.install dependencs:
 sudo apt install autoconf libtool build-essential aapt cmake gdb pkg-config zip gettext libx11-dev libxcursor-dev libxcb1-dev libxcb-image0-dev libxcb-cursor-dev bison python>=3.7 pip3-python python3-lxml meson
 pip install lxml Pillow polib requests xlrd xlwt
### 2.install vcpkg:
* git clone https://www.github.com/microsoft/vcpkg.git
* cd vcpkg
* ./bootstrap-vcpkg.sh
### 3.download cdroid source code:
* cd ~
* git clone http://www.gitee.com/houstudio/cdroid.git<br>
### 4. install cdroid supported toolchain's patch
* cp cdroid/scripts/vcpkgpatch4cdroid.tar.gz vcpkg/
* cd vcpkg
* tar -zxvf vcpkgpatch4cdroid.tar.gz 
### 5.install cdroid deplibs:
* ./cdroid_install_libs.sh --triplet=x64-linux-dynamic<br>
### 6.build cdroid:
* cd cdroid
* ./build.sh --build=debug
* cd outX64-Debug
* make -j
### 7.prepare system and app resource
*The cdroid.pak and yourapp's pak must be in your working directory*
* cp src/gui/cdroid.pak ./
* cp apps/appname/appname.pak ./
### 8.run samples(in directory outX64-Debug)
* apps/samples/helloworld
* apps/uidemo1/uidemo1

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