152 lines
5.4 KiB
Markdown
152 lines
5.4 KiB
Markdown
---
|
|
id: android-building-from-source
|
|
title: Building React Native from source
|
|
layout: docs
|
|
category: Guides (Android)
|
|
permalink: docs/android-building-from-source.html
|
|
next: activityindicator
|
|
previous: android-ui-performance
|
|
---
|
|
|
|
You will need to build React Native from source if you want to work on a new feature/bug fix, try out the latest features which are not released yet, or maintain your own fork with patches that cannot be merged to the core.
|
|
|
|
## Prerequisites
|
|
|
|
Assuming you have the Android SDK installed, run `android` to open the Android SDK Manager.
|
|
|
|
Make sure you have the following installed:
|
|
|
|
1. Android SDK version 23 (compileSdkVersion in [`build.gradle`](https://github.com/facebook/react-native/blob/master/ReactAndroid/build.gradle))
|
|
2. SDK build tools version 23.0.1 (buildToolsVersion in [`build.gradle`](https://github.com/facebook/react-native/blob/master/ReactAndroid/build.gradle))
|
|
3. Local Maven repository for Support Libraries (formerly `Android Support Repository`) >= 17 (for Android Support Library)
|
|
4. Android NDK (download links and installation instructions below)
|
|
|
|
### Point Gradle to your Android SDK:
|
|
|
|
**Step 1:** Set environment variables through your local shell.
|
|
|
|
Note: Files may vary based on shell flavor. See below for examples from common shells.
|
|
|
|
- bash: `.bash_profile` or `.bashrc`
|
|
- zsh: `.zprofile` or `.zshrc`
|
|
- ksh: `.profile` or `$ENV`
|
|
|
|
Example:
|
|
|
|
```
|
|
export ANDROID_SDK=/Users/your_unix_name/android-sdk-macosx
|
|
export ANDROID_NDK=/Users/your_unix_name/android-ndk/android-ndk-r10e
|
|
```
|
|
|
|
**Step 2:** Create a `local.properties` file in the `android` directory of your react-native app with the following contents:
|
|
|
|
Example:
|
|
|
|
```
|
|
sdk.dir=/Users/your_unix_name/android-sdk-macosx
|
|
ndk.dir=/Users/your_unix_name/android-ndk/android-ndk-r10e
|
|
```
|
|
|
|
### Download links for Android NDK
|
|
|
|
1. Mac OS (64-bit) - http://dl.google.com/android/repository/android-ndk-r10e-darwin-x86_64.zip
|
|
2. Linux (64-bit) - http://dl.google.com/android/repository/android-ndk-r10e-linux-x86_64.zip
|
|
3. Windows (64-bit) - http://dl.google.com/android/repository/android-ndk-r10e-windows-x86_64.zip
|
|
4. Windows (32-bit) - http://dl.google.com/android/repository/android-ndk-r10e-windows-x86.zip
|
|
|
|
You can find further instructions on the [official page](http://developer.android.com/ndk/downloads/index.html).
|
|
|
|
## Building the source
|
|
|
|
#### 1. Installing the fork
|
|
|
|
First, you need to install `react-native` from your fork. For example, to install the master branch from the official repo, run the following:
|
|
|
|
```sh
|
|
npm install --save github:facebook/react-native#master
|
|
```
|
|
|
|
Alternatively, you can clone the repo to your `node_modules` directory and run `npm install` inside the cloned repo.
|
|
|
|
#### 2. Adding gradle dependencies
|
|
|
|
Add `gradle-download-task` as dependency in `android/build.gradle`:
|
|
|
|
```gradle
|
|
...
|
|
dependencies {
|
|
classpath 'com.android.tools.build:gradle:1.3.1'
|
|
classpath 'de.undercouch:gradle-download-task:2.0.0'
|
|
|
|
// NOTE: Do not place your application dependencies here; they belong
|
|
// in the individual module build.gradle files
|
|
}
|
|
...
|
|
```
|
|
|
|
#### 3. Adding the `:ReactAndroid` project
|
|
|
|
Add the `:ReactAndroid` project in `android/settings.gradle`:
|
|
|
|
```gradle
|
|
...
|
|
include ':ReactAndroid'
|
|
|
|
project(':ReactAndroid').projectDir = new File(
|
|
rootProject.projectDir, '../node_modules/react-native/ReactAndroid')
|
|
...
|
|
```
|
|
|
|
Modify your `android/app/build.gradle` to use the `:ReactAndroid` project instead of the pre-compiled library, e.g. - replace `compile 'com.facebook.react:react-native:+'` with `compile project(':ReactAndroid')`:
|
|
|
|
```gradle
|
|
...
|
|
dependencies {
|
|
compile fileTree(dir: 'libs', include: ['*.jar'])
|
|
compile 'com.android.support:appcompat-v7:23.0.1'
|
|
|
|
compile project(':ReactAndroid')
|
|
|
|
...
|
|
}
|
|
...
|
|
```
|
|
|
|
#### 4. Making 3rd-party modules use your fork
|
|
|
|
If you use 3rd-party React Native modules, you need to override their dependencies so that they don't bundle the pre-compiled library. Otherwise you'll get an error while compiling - `Error: more than one library with package name 'com.facebook.react'`.
|
|
|
|
Modify your `android/app/build.gradle`, and add:
|
|
|
|
```gradle
|
|
configurations.all {
|
|
exclude group: 'com.facebook.react', module: 'react-native'
|
|
}
|
|
```
|
|
|
|
## Building from Android Studio
|
|
|
|
From the Welcome screen of Android Studio choose "Import project" and select the `android` folder of your app.
|
|
|
|
You should be able to use the _Run_ button to run your app on a device. Android Studio won't start the packager automatically, you'll need to start it by running `npm start` on the command line.
|
|
|
|
## Additional notes
|
|
|
|
Building from source can take a long time, especially for the first build, as it needs to download ~200 MB of artifacts and compile the native code. Every time you update the `react-native` version from your repo, the build directory may get deleted, and all the files are re-downloaded. To avoid this, you might want to change your build directory path by editing the `~/.gradle/init.gradle ` file:
|
|
|
|
```gradle
|
|
gradle.projectsLoaded {
|
|
rootProject.allprojects {
|
|
buildDir = "/path/to/build/directory/${rootProject.name}/${project.name}"
|
|
}
|
|
}
|
|
```
|
|
|
|
## Testing
|
|
|
|
If you made changes to React Native and submit a pull request, all tests will run on your pull request automatically. To run the tests locally, see [Testing](/react-native/docs/testing.html).
|
|
|
|
## Troubleshooting
|
|
|
|
Gradle build fails in `ndk-build`. See the section about `local.properties` file above.
|