React-Native run-android on specific device

Is it possible to use the run-android command for one specific device only?

For example, if I have three devices (or emulators) connected and I want to use run-android on only one of them?

Maybe something like adb install -s DEVICE_NUMBER?

Thanks in advance

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You don't need to use run-android command to start it on specific device

Firstly, you have to start the packager:

./packager/packager.sh

Then just build an APK file and run it on target device. APK will connect to the build server, and fetch bundle from it automatically.

But if it didn't happen by some reasons, click on reload button :-)

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最佳答案

Elaborating on @alexander 's answer, you can use the following workflow:

cd android
./gradlew assembleDebug # assembleRelease for release builds
adb install -s <yourdevice> app/build/outputs/apk/yourapk.apk # You can check the identifier for your device with adb devices
adb reverse tcp:8081 tcp:8081 Will forward the phone's 8081 port to the computer's 8081, where the packager listens. If you are deploying over Wi-Fi, have a look at: https://facebook.github.io/react-native/docs/running-on-device-android.html#configure-your-app-to-connect-to-the-local-dev-server-via-wi-fi

In a different screen, run:

npm start # Will run the packager

If you really need this, you might want to wrap the first snippet into a script that you can parametrize with your phone's identifier.

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May be we can not select which android device attached to run.

Read from official react native website:

You must have only one device connected at a time.

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To run react-native application on optional device you can specify some flags in run command. To see available add --help:

react-native run-android --help

Then you can specify your device id throught --deviceId

react-native run-android --deviceId=DEVICE_ID

To see available devices ids'

adb devices

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To list AVDs:

$ANDROID_HOME/tools/emulator -list-avds

To run a specific emulator:

$ANDROID_HOME/tools/emulator -avd Pixel_API_28_AOSP

To run React Native in the currently-open emulator:

react-native run-android

To choose between multiple running emulators:

adb devices
react-native run-android --deviceId=DEVICE_ID

(Last point from this answer)

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npx react-native run-android --deviceId='myDeviceId'

This works for me. don't forget '' this one. it accepts string

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When 2 or more devices are connected

There seem to be no way to install app on a specific device in this scenario. So follow this

  1. Disconnect all devices except one
  2. run the command, in my case its react-native run-android
  3. Now connect another device
  4. repeat 2nd point
  5. when done with every device, connect all and see device ids adb devices
  6. now map device's port 8081 to computer's 8081

Eg:

 adb -s DEV_1_ID reverse tcp:8081 tcp:8081
adb -s DEV_2_ID reverse tcp:8081 tcp:8081
adb -s DEV_3_ID reverse tcp:8081 tcp:8081
...
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To run the app on one specific connected android device:

  1. Disconnect/Unplug all connected android devices.
  2. Connect/Plug the device you want to install the app in
  3. Run adb devices on your terminal to see the list connected devices (you should only see 1 such device as rest were disconnected)
  4. Run npx react-native run-android

This will install the React-native app on the connected device via usb.

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Actually, first of all, be sure about adb installation which I think while setting up your RN environment you have it for sure, follow these steps:

  1. Connect your Android external device to your computer with a cable

  2. Run this command adb devices and you will see the result at least:

    List of devices attached
9999xxx3434yyy  device

    FYI: the 9999xxx3434yyy is your device id

  3. Put the given device id in the following command

    npx react-native run-android --deviceId="9999xxx3434yyy"

    or

    yarn run react-native run-android --deviceId="9999xxx3434yyy"

HINT: If the device is a Xiaomi product keep watching the phone screen because you should grand install access.

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If you're using React >= 0.68.x. Just type this:

npx react-native run-android --deviceId=VCR4XCORPFTKAQFA

VCR4XCORPFTKAQFA is recovered typing adb devices in your terminal.


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