Issue
I am trying to get React-Native to work with Android V4.2.2 (Genymotion) but I am unable to test the app on the Emulator. When I ran react-native run-android, I get this error Could not run adb reverse: spawnSync
JS server already running.
Running ~/Library/Android/sdk/platform-tools/adb reverse tcp:8081 tcp:8081
Could not run adb reverse: spawnSync ~/Library/Android/sdk/platform-tools/adb ENOENT
Building and installing the app on the device (cd android && ./gradlew installDebug...
FAILURE: Build failed with an exception.
* What went wrong:
A problem occurred configuring project ':app'.
> The SDK directory '~/Library/Android/sdk' does not exist.
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
BUILD FAILED
Total time: 3.785 secs
Could not install the app on the device, read the error above for details.
Make sure you have an Android emulator running or a device connected and have
set up your Android development environment:
https://facebook.github.io/react-native/docs/android-setup.html
NOTE: In the log it saids SDK directory does not exist, I have double check that I do have the SDK installed in that directory.
I found my android emulator when executing adb devices
List of devices attached
192.168.56.101:5555 device
I have tried the following steps from Stack Overflow post, but still no luck https://stackoverflow.com/a/38536290/4540216
Solution
I got the same issue. I updated my ANDROID_HOME env variable again it worked for me.
Follow this React-native android-setup documentation
ex:
export ANDROID_HOME=~/Library/Android/sdk
Windows:
set ANDROID_HOME=c:/Users/whoever/AppData/Local/Android/Sdk
macOS Mojave and earlier or bash users:
1 - Open your bash profile:
open .bash_profile
Add this to your bash_profile:
export ANDROID_SDK=/Users/<your_computer_name>/Library/Android/sdk
export PATH=/Users/<your_computer_name>/Library/Android/sdk/platform-tools:$PATH
Save and close
Compile your changes
source ~/.bash_profile
For macOS Catalina and zsh users:
Starting with macOS Catalina, your Mac uses zsh as the default login shell and interactive shell. You can make zsh the default in earlier versions of macOS as well.
On your Mac:
Open your .zshrc file:
open ~/.zshrc
If .zshrc file not exist, you need to create one using touch & open.
touch ~/.zshrc
Add this to your .zshrc file
export ANDROID_SDK=/Users/<your_computer_name>/Library/Android/sdk
export PATH=/Users/<your_computer_name>/Library/Android/sdk/platform-tools:$PATH
Save and close
Compile your changes
source ~/.zshrc
Edit: Updated answer for macOS Catalina and zsh users.
Answered By - SureshCS50
Answer Checked By - Candace Johnson (JavaFixing Volunteer)
