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React Native's Run-Android has different tasks performed with or without a device ID
beginning
React Native's run-android command installs APKs on all Android devices connected to a PC.
On the other hand, if you specify the device ID with --deviceID, you can install APKs only on specific Android devices.
However, since there was a difference between Gradle tasks executed with and without device ID specified, I have summarized the results of my research.
versions
- @react -native-community/cli-platform-android: 4.9.0
How to investigate the tasks to be performed
If you specify the --verbose option of the react-native command, you can see the command to be executed, so check it with this.
If you don't specify a device ID
$ react-native run-android --verbose
Info Running jetifier to migrate libraries to AndroidX. Can you disable it using the “--no-jetifier” flag.
Jetifier found 1041 file (s) to forward-jetify. Using 8 workers...
INFO JS SERVER ALREADY RUNNING.
Info Presents the App...
debug running command “cd android && gradlew.bat app: installDebug -preactNativeDevServerport=8081”
The app:installDebug task is running. This builds the app and installs the APK on all Android devices.
When specifying a device ID
$ react-native run-android --verbose --deviceId xxxxx
Info Running jetifier to migrate libraries to AndroidX. Can you disable it using the “--no-jetifier” flag.
Jetifier found 1391 file (s) to forward-jetify. Using 8 workers...
INFO JS SERVER ALREADY RUNNING.
INFO BUILDING THE APP...
debug running command "gradlew.bat build -x lint”
The build task is running. This performs app builds, tests, Javadoc builds, etc.
Furthermore, even if a task is specified with the --tasks option, it is not reflected, so tasks other than the build cannot be excluded.
I want to install it on a specific device with just an apk build
Currently, it is impossible to change it with options, etc., so it seems that there is only one of the following.
- Turn off or unplug the USB cable on the Android device you don't want to install
- Rewrite “build” in the buildAPK of node_modules/ @react -native-community/cli-platform-Android/build/commands/runAndroid/index.js to “assembleDebug”
When the following pull requests are imported, the build commands are unified and replaced by assembleDebug tasks, so it seems that they will be resolved in the future.