Run react-native on android emulator

Question

I try to run react-native app on genymotion android emulator on my mac  When I write react-native run-android It gets   Running  usr local opt android-sdk platform-tools adb reverse tcp 8081 tcp 8081 error  closed Could not run adb reverse  Command failed   usr local opt android-sdk platform-tools adb reverse tcp 8081 tcp 8081 Building and installing the app on the device  cd android  amp  amp    gradlew installDebug    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 MacBook-Pro-MacBook ART-CarefulPeople macbook     Then I ve tried    react-native start react-native run-android   The same result   Then I ve tried    react-native bundle --entry-file index android js --platform android --bundle-output android app src main assets index android bundle curl  http   localhost 8081 index android bundle platform android  -o  android app src main assets index android bundle  react-native run-android   The same result   I ve tried just adb reverse tcp 8081 tcp 8081 and it says error  closed  When I try to run app on android-sdk emulator it gets the same error above but without error  closed   From android studio I can run this app and it works on genymotion   Tell me please what should I do to run my app on android emulator

User · Answer

On Windows 10 and Android Studio you can go in Android Studio to "File"->"Settings" in Settings then to "Appearance & Behavior" -> "System Settings" -> "Android SDK". In the Tab "SDK Tools" active:

"Android SDK Build-Tools .."
"Android Emulator"
"Android SDK Plattform-Tools"
"Android SDK Tools"

If all installed then you can start the Emulator in Android Studio with "Tools" -> "Android" -> "AVD Manager". If the Emulator run you can try "react-native run-android"

User · Answer

In my case  this was happening because the android gradlew file did not have execute permission  Once granted  this worked fine

User · Answer

On macOs I manage to fix this by adding  export ANDROID HOME  HOME Library Android sdk export PATH  PATH  ANDROID HOME emulator export PATH  PATH  ANDROID HOME tools export PATH  PATH  ANDROID HOME tools bin export PATH  PATH  ANDROID HOME platform-tools  to    zsh profile file  and than type to your terminal source  HOME  zsh profile  The issue was caused by using iTerm2 shell so it s required to edit its own config instead of default  HOME  bash profile as described in the official documentation https   reactnative dev docs environment-setup

User · Answer

Had a similar problem   I updated my Genymotion and my android SDK s libraries dependencies and all seemed to work  To update my SDK s I used android sdk manager  ANDROID SDK FOLDER  tools android sdk

User · Answer

I had similar issue running emulator from android studio everytime  or on a physical device  Instead  you can quickly run android emulator from command line   android avd   Once the emulator is running  you can check with adb devices if the emulator shows up  Then you can simply use react-native run-android to run the app on the emulator   Make sure you ve platform tools installed to be able to use adb  Or you can use  brew install android-platform-tools

User · Answer

You probably haven t run the Android SDK in forever  So you probably just have to update it  If you open the Android Studio Software it ll probably let you know that and ask to update it for you  Otherwise refer to following link  Update Android SDK

User · Answer

Try  brew cask install android-platform-tools adb reverse tcp 9090 tcp 9090 run the app

User · Answer

I had a similar problem  and after spending so much time and lots of searching about this issue the only trick worked for me     Please Install the Required SDKs as shown in this figure    Configure Required SDKs    If You have already installed it  so you must have to update the following SDKs    Android SDK Tool  update it to latest version  Android SDK Platform-tools  update it to latest version  Android SDK Build-tools  update it to latest version  Android Support Repository under Extra folder  update it to latest version   You Must have at least Installed the Same version Android API as the installed Android SDK Build-tools  amp  Android SDK Platform-tools version as shown in the Configure Required SDKs figure above       Note  Local Maven repository for Support Libraries which is listed as the SDK requirement in the official docs of React-native is now named as Android Support Repository in the SDK Manager

User · Answer

It happened to me that I had an instance of the packager running with an old project  I ran react-native start as usual   I was using Ubuntu 14 04  So what I did was to stop that instance and go to my project folder and in two different console tabs I ran these two commands separately   npm start  here I used to run react-native start react-native run-android   npm start is defined in my package json as    start    node modules react-native packager packager sh    I don t know if there is a sort of confusing stuff for react-native but that did the trick

User · Answer

You can also try use  quot doctor quot  command  It will fix most cases  npx  react-native-community cli doctor

[android-emulator] Run react-native on android emulator

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