103 lines
3.4 KiB
Markdown
103 lines
3.4 KiB
Markdown
# Building React Native for Android
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This guide contains instructions for building the Android code and running the sample apps.
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## Supported Operating Systems
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This setup has only been tested on Mac OS so far.
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## Prerequisites
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Assuming you have the [Android SDK](https://developer.android.com/sdk/installing/index.html) installed, run `android` to open the Android SDK Manager.
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Make sure you have the following installed:
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- Android SDK version 23 (compileSdkVersion in [`build.gradle`](build.gradle))
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- SDK build tools version 23.0.1 (buildToolsVersion in [`build.gradle`](build.gradle))
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- Android Support Repository 20 (for Android Support Library)
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- Android NDK (download & extraction instructions [here](http://developer.android.com/ndk/downloads/index.html))
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Point Gradle to your Android SDK: either have `$ANDROID_SDK` and `$ANDROID_NDK` defined, or create a `local.properties` file in the root of your `react-native` checkout with the following contents:
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sdk.dir=absolute_path_to_android_sdk
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ndk.dir=absolute_path_to_android_ndk
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Example:
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sdk.dir=/Users/your_unix_name/android-sdk-macosx
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ndk.dir=/Users/your_unix_name/android-ndk/android-ndk-r10c
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## Run `npm install`
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This is needed to fetch the dependencies for the packager.
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```bash
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cd react-native
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npm install
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```
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## Building from the command line
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To build the framework code:
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```bash
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cd react-native
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./gradlew :ReactAndroid:assembleDebug
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```
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To install a snapshot version of the framework code in your local Maven repo:
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```bash
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./gradlew :ReactAndroid:installArchives
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```
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## Running the examples
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To run the Sample app:
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```bash
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cd react-native
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./gradlew :Examples:SampleApp:android:app:installDebug
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# Start the packager in a separate shell:
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# Make sure you ran npm install
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./packager/packager.sh
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# Open SampleApp in your emulator, Menu button -> Reload JS should work
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```
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You can run any other sample app the same way, e.g.:
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```bash
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./gradlew :Examples:Movies:android:app:installDebug
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./gradlew :Examples:UIExplorer:android:app:installDebug
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```
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## Building from Android Studio
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You'll need to do one additional step until we release the React Native Gradle plugin to Maven central. This is because Android Studio has its own local Maven repo:
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mkdir -p /Applications/Android\ Studio.app/Contents/gradle/m2repository/com/facebook/react
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cp -r ~/.m2/repository/com/facebook/react/gradleplugin /Applications/Android\ Studio.app/Contents/gradle/m2repository/com/facebook/react/
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Now, open Android Studio, click _Import Non-Android Studio project_ and find your `react-native` repo.
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In the configurations dropdown, _app_ should be selected. Click _Run_.
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## Installing the React Native .aar in your local Maven repo
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In some cases, for example when working on the `react-native-cli` it's useful to publish a snapshot version of React Native into your local Maven repo. This way, Gradle can pick it up when building projects that have a Maven dependency on React Native.
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Run:
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```bash
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cd react-native-android
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./gradlew :ReactAndroid:installArchives
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```
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## Troubleshooting
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Gradle build fails in `ndk-build`. See the section about `local.properties` file above.
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Gradle build fails "Could not find any version that matches com.facebook.react:gradleplugin:...". See the section about the React Native Gradle plugin above.
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Packager throws an error saying a module is not found. Try running `npm install` in the root of the repo.
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