Oleksandr Melnykov
88e18b6c8d
Summary: [Android] [Added] - Release underlying resources when JS instance is GC'ed on Android D15826082 was reverted because it introduced a crash in Ads Manager for Android (see P67222724). This diff fixes the crash and re-applies D15826082. The problem was that `jni::findClassStatic` in the destructor of BlobCollector.cpp couldn't find the Java class `com/facebook/react/modules/blob/BlobModule` and crashed the app. JNI didn't seem to have access to the Java class loader probably because the destructor was called from a non-Java thread (https://our.intern.facebook.com/intern/wiki/Fbjni/environment-and-thread-management/?vitals_event=wiki_click_navigation_link#threads). The fix is to wrap the code in the destructor inside `ThreadScope::WithClassLoader `, which will allow to run code that has full access to Java as though you were running in a Java thread. Reviewed By: shergin Differential Revision: D16122059 fbshipit-source-id: 12f14fa4a58218242a482c2c3e2149bb6770e8ec
RNTester
The RNTester showcases React Native views and modules.
Running this app
Before running the app, make sure you ran:
git clone https://github.com/facebook/react-native.git
cd react-native
npm install
Running on iOS
Both macOS and Xcode are required.
- Install CocoaPods. We installing CocoaPods using Homebrew:
brew install cocoapods - Run
cd RNTester; pod install - Open the generated
RNTesterPods.xcworkspace. This is not checked in, as it is generated by CocoaPods. Do not openRNTesterPods.xcodeprojdirectly.
Running on Android
You'll need to have all the prerequisites (SDK, NDK) for Building React Native installed.
Start an Android emulator (Genymotion is recommended).
cd react-native
./gradlew :RNTester:android:app:installDebug
./scripts/packager.sh
Note: Building for the first time can take a while.
Open the RNTester app in your emulator.
See Running on Device in case you want to use a physical device.
Running with Buck
Follow the same setup as running with gradle.
Install Buck from here.
Run the following commands from the react-native folder:
./gradlew :ReactAndroid:packageReactNdkLibsForBuck
buck fetch rntester
buck install -r rntester
./scripts/packager.sh
Note: The native libs are still built using gradle. Full build with buck is coming soon(tm).
Running Detox Tests on iOS
Install Detox from here.
To run the e2e tests locally, run the following commands from the react-native folder:
yarn build-ios-e2e
yarn test-ios-e2e
These are the equivalent of running:
detox build -c ios.sim.release
detox test -c ios.sim.release --cleanup
These build the app in Release mode, so the production code is bundled and included in the built app.
When developing E2E tests, you may want to run in development mode, so that changes to the production code show up immediately. To do this, run:
detox build -c ios.sim.debug
detox test -c ios.sim.debug
You will also need to have Metro Bundler running in another terminal. Note that if you've previously run the E2E tests in release mode, you may need to delete the RNTester/build folder before rerunning detox build.
Building from source
Building the app on both iOS and Android means building the React Native framework from source. This way you're running the latest native and JS code the way you see it in your clone of the github repo.
This is different from apps created using react-native init which have a dependency on a specific version of React Native JS and native code, declared in a package.json file (and build.gradle for Android apps).