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James Prendergast d15e7110de Update the README and fix some typos (#199) 
* Updated the readme with the additional targets and fixed some typos

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# GitHub Action - Android Emulator Runner
<p align="left">
<a href="https://github.com/ReactiveCircus/android-emulator-runner"><img alt="GitHub Actions status" src="https://github.com/ReactiveCircus/android-emulator-runner/workflows/Main%20workflow/badge.svg"></a>
</p>
A GitHub Action for installing, configuring and running hardware-accelerated Android Emulators on macOS virtual machines.
The old ARM-based emulators were slow and are no longer supported by Google. The modern Intel Atom (x86 and x86_64) emulators require hardware acceleration (HAXM on Mac & Windows, QEMU on Linux) from the host to run fast. This presents a challenge on CI as to be able to run hardware accelerated emulators within a docker container, **KVM** must be supported by the host VM which isn't the case for cloud-based CI providers due to infrastructural limits. If you want to learn more about this, here's an article I wrote: [Running Android Instrumented Tests on CI](https://dev.to/ychescale9/running-android-emulators-on-ci-from-bitrise-io-to-github-actions-3j76).
The **macOS** VM provided by **GitHub Actions** has **HAXM** installed so we are able to create a new AVD instance, launch an emulator with hardware acceleration, and run our Android
tests directly on the VM. You can also achieve this on a self-hosted Linux runner, but it will need to be on a compatible instance that allows you to enable KVM - for example AWS EC2 Bare Metal instances.
This action automates the process by doing the following:
- Install / update the required **Android SDK** components including `build-tools`, `platform-tools`, `platform` (for the required API level), `emulator` and `system-images` (for the required API level).
- Create a new instance of **AVD** with the provided [configurations](#configurations).
- Launch a new Emulator with the provided [configurations](#configurations).
- Wait until the Emulator is booted and ready for use.
- Run a custom script provided by user once the Emulator is up and running - e.g. `./gradlew connectedCheck`.
- Kill the Emulator and finish the action.
## Usage
It is recommended to run this action on a **macOS** VM, e.g. `macos-latest`, `macos-10.15` or `macos-11` to take advantage of hardware acceleration support provided by **HAXM**.
A workflow that uses **android-emulator-runner** to run your instrumented tests on **API 29**:
```
jobs:
test:
runs-on: macos-latest
steps:
- name: checkout
uses: actions/checkout@v2
- name: run tests
uses: reactivecircus/android-emulator-runner@v2
with:
api-level: 29
script: ./gradlew connectedCheck
```
We can also leverage GitHub Actions's build matrix to test across multiple configurations:
```
jobs:
test:
runs-on: macos-latest
strategy:
matrix:
api-level: [21, 23, 29]
target: [default, google_apis]
steps:
- name: checkout
uses: actions/checkout@v2
- name: run tests
uses: reactivecircus/android-emulator-runner@v2
with:
api-level: ${{ matrix.api-level }}
target: ${{ matrix.target }}
arch: x86_64
profile: Nexus 6
script: ./gradlew connectedCheck
```
If you need specific versions of **NDK** and **CMake** installed:
```
jobs:
test:
runs-on: macos-latest
steps:
- name: checkout
uses: actions/checkout@v2
- name: run tests
uses: reactivecircus/android-emulator-runner@v2
with:
api-level: 29
ndk: 21.0.6113669
cmake: 3.10.2.4988404
script: ./gradlew connectedCheck
```
We can significantly reduce emulator startup time by setting up AVD snapshot caching:
1. add an `actions/cache@v2` step for caching the `avd`
2. add a `reactivecircus/android-emulator-runner@v2` step to generate a clean snapshot - specify `emulator-options` without `no-snapshot`
3. add another `reactivecircus/android-emulator-runner@v2` step to run your tests using existing AVD / snapshot - specify `emulator-options` with `no-snapshot-save`
```
jobs:
test:
runs-on: macos-latest
strategy:
matrix:
api-level: [21, 23, 29]
steps:
- name: checkout
uses: actions/checkout@v2
- name: Gradle cache
uses: actions/cache@v2
with:
path: |
~/.gradle/caches
~/.gradle/wrapper
key: gradle-${{ runner.os }}-${{ hashFiles('**/*.gradle*') }}-${{ hashFiles('**/gradle/wrapper/gradle-wrapper.properties') }}-${{ hashFiles('**/buildSrc/**/*.kt') }}
- name: AVD cache
uses: actions/cache@v2
id: avd-cache
with:
path: |
~/.android/avd/*
~/.android/adb*
key: avd-${{ matrix.api-level }}
- name: create AVD and generate snapshot for caching
if: steps.avd-cache.outputs.cache-hit != 'true'
uses: reactivecircus/android-emulator-runner@v2
with:
api-level: ${{ matrix.api-level }}
force-avd-creation: false
emulator-options: -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
disable-animations: false
script: echo "Generated AVD snapshot for caching."
- name: run tests
uses: reactivecircus/android-emulator-runner@v2
with:
api-level: ${{ matrix.api-level }}
force-avd-creation: false
emulator-options: -no-snapshot-save -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
disable-animations: true
script: ./gradlew connectedCheck
```
## Configurations
| **Input** | **Required** | **Default** | **Description** |
|-|-|-|-|
| `api-level` | Required | N/A | API level of the platform system image - e.g. 23 for Android Marshmallow, 29 for Android 10. **Minimum API level supported is 15**. |
| `target` | Optional | `default` | Target of the system image - `default`, `google_apis`, `playstore`, `android-wear`, `android-wear-cn`, `android-tv`, `google-tv`, `aosp_atd` or `google_atd`. Note that `aosp_atd` and `google_atd` currently require the following: `api-level: 30`, `arch: x86` or `arch: arm64-v8` and `channel: canary`. |
| `arch` | Optional | `x86` | CPU architecture of the system image - `x86`, `x86_64` or `arm64-v8a`. Note that `x86_64` image is only available for API 21+. `arm64-v8a` images require Android 4.2+ and are limited to fewer API levels (e.g. 30). |
| `profile` | Optional | N/A | Hardware profile used for creating the AVD - e.g. `Nexus 6`. For a list of all profiles available, run `avdmanager list device`. |
| `cores` | Optional | 2 | Number of cores to use for the emulator (`hw.cpu.ncore` in config.ini). |
| `ram-size` | Optional | N/A | Size of RAM to use for this AVD, in KB or MB, denoted with K or M. - e.g. `2048M` |
| `sdcard-path-or-size` | Optional | N/A | Path to the SD card image for this AVD or the size of a new SD card image to create for this AVD, in KB or MB, denoted with K or M. - e.g. `path/to/sdcard`, or `1000M`. |
| `avd-name` | Optional | `test` | Custom AVD name used for creating the Android Virtual Device. |
| `force-avd-creation` | Optional | `true` | Whether to force create the AVD by overwriting an existing AVD with the same name as `avd-name` - `true` or `false`. |
| `emulator-options` | Optional | See below | Command-line options used when launching the emulator (replacing all default options) - e.g. `-no-window -no-snapshot -camera-back emulated`. |
| `disable-animations` | Optional | `true` | Whether to disable animations - `true` or `false`. |
| `disable-spellchecker` | Optional | `false` | Whether to disable spellchecker - `true` or `false`. |
| `disable-linux-hw-accel` | Optional | `true` | Whether to disable hardware acceleration on Linux machines - `true` or `false`. Note that this is true by default as Github-hosted Linux runners do not support hardware acceleration. |
| `enable-hw-keyboard` | Optional | `false` | Whether to enable hardware keyboard - `true` or `false`. |
| `emulator-build` | Optional | N/A | Build number of a specific version of the emulator binary to use e.g. `6061023` for emulator v29.3.0.0. |
| `working-directory` | Optional | `./` | A custom working directory - e.g. `./android` if your root Gradle project is under the `./android` sub-directory within your repository. |
| `ndk` | Optional | N/A | Version of NDK to install - e.g. `21.0.6113669` |
| `cmake` | Optional | N/A | Version of CMake to install - e.g. `3.10.2.4988404` |
| `channel` | Optional | stable | Channel to download the SDK components from - `stable`, `beta`, `dev`, `canary` |
| `script` | Required | N/A | Custom script to run - e.g. to run Android instrumented tests on the emulator: `./gradlew connectedCheck` |
Default `emulator-options`: `-no-window -gpu swiftshader_indirect -no-snapshot -noaudio -no-boot-anim`.
## Can I use this action on Linux VMs?
The short answer is yes but on Github-hosted Linux runners it's expected to be a much worse experience (on some newer API levels it might not work at all) than running it on macOS. You can get it running much faster on self-hosted Linux runners but only if the underlying instances support KVM (which most don't).
For a longer answer please refer to [this issue](https://github.com/ReactiveCircus/android-emulator-runner/issues/46).
## Who is using Android Emulator Runner?
These are some of the open-source projects using (or used) **Android Emulator Runner**:
- [coil-kt/coil](https://github.com/coil-kt/coil/blob/master/.github/workflows)
- [cashapp/sqldelight](https://github.com/cashapp/sqldelight/blob/master/.github/workflows)
- [square/workflow-kotlin](https://github.com/square/workflow-kotlin/tree/main/.github/workflows)
- [square/retrofit](https://github.com/square/retrofit/blob/master/.github/workflows)
- [natario1/CameraView](https://github.com/natario1/CameraView/tree/master/.github/workflows)
- [natario1/Transcoder](https://github.com/natario1/Transcoder/tree/master/.github/workflows)
- [chrisbanes/insetter](https://github.com/chrisbanes/insetter/tree/main/.github/workflows)
- [slackhq/keeper](https://github.com/slackhq/keeper/tree/main/.github/workflows)
- [android/compose-samples](https://github.com/android/compose-samples/tree/main/.github/workflows)
- [ReactiveCircus/streamlined](https://github.com/ReactiveCircus/streamlined/tree/main/.github/workflows)
- [ReactiveCircus/FlowBinding](https://github.com/ReactiveCircus/FlowBinding/tree/main/.github/workflows)
- [JakeWharton/RxBinding](https://github.com/JakeWharton/RxBinding/tree/master/.github/workflows)
- [vinaygaba/Learn-Jetpack-Compose-By-Example](https://github.com/vinaygaba/Learn-Jetpack-Compose-By-Example/tree/master/.github/workflows)
- [ashishb/adb-enhanced](https://github.com/ashishb/adb-enhanced/tree/master/.github/workflows)
- [vgaidarji/ci-matters](https://github.com/vgaidarji/ci-matters/blob/master/.github/workflows/main.yaml)
- [simpledotorg/simple-android](https://github.com/simpledotorg/simple-android/tree/master/.github/workflows)
- [cashapp/copper](https://github.com/cashapp/copper/blob/trunk/.github/workflows/build.yaml)
- [square/radiography](https://github.com/square/radiography/blob/main/.github/workflows/android.yml)
- [Shopify/android-testify](https://github.com/Shopify/android-testify/blob/master/.github/workflows/sample_build.yml)
- [square/leakcanary](https://github.com/square/leakcanary/tree/main/.github/workflows)
- [hash-checker/hash-checker](https://github.com/hash-checker/hash-checker/tree/master/.github/workflows)
- [hash-checker/hash-checker-lite](https://github.com/hash-checker/hash-checker-lite/tree/master/.github/workflows)
- [Kiwix/kiwix-android](https://github.com/kiwix/kiwix-android/blob/develop/.github/workflows)
- [wikimedia/apps-android-wikipedia](https://github.com/wikimedia/apps-android-wikipedia/blob/master/.github/workflows)
- [google/android-fhir](https://github.com/google/android-fhir/tree/master/.github/workflows)
- [google/accompanist](https://github.com/google/accompanist/blob/main/.github/workflows)
- [dotanuki-labs/norris](https://github.com/dotanuki-labs/norris/blob/master/.github/workflows/main.yml)
- [tinylog-org/tinylog](https://github.com/tinylog-org/tinylog/blob/v3.0/.github/workflows/build.yaml)
- [hzi-braunschweig/SORMAS-Project](https://github.com/hzi-braunschweig/SORMAS-Project/blob/development/.github/workflows/sormas_app_ci.yml)
If you are using **Android Emulator Runner** and want your project included in the list, please feel free to create an issue or open a pull request.
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