flutter run No connected devices

Question

I am trying to create a sample application with flutter  fresh installation  android studio is also installed  fresh installation   Here is the output of flutter run  flutter run   No connected devices    the output of flutter doctor  Doctor summary  to see all details  run flutter doctor -v       Flutter  Channel beta  v0 1 5  on Linux  locale en US UTF-8      Android toolchain - develop for Android devices  Android SDK 27 0 3      Android Studio  version 3 0      VS Code  version 1 20 1      Connected devices   No devices available    Doctor found issues in 2 categories    Is there a solution to this problem

User · Answer

I m using genymotion for testing apps  I have same problem when i press the run button i face this error last two hours     how to fixed this error just reinstall genymotion this error is gone

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It basically needs a device  connected  to your development machine  If you re using a simulator emulator running on the machine it should automatically be recognised as a connected device  Another way is to connect a physical device and the setup process varies slightly for Android and iOS devices

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This works for me      Go to Settings   Developer options   Disable USB debugging   Re-enable USB debugging

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If you have    Downloaded the flutter SDK Connected your mobile device and enabled the developer option on the mobile and allowed USB debugging    And still you are getting  No device connected  then i think you should install ADB driver  It worked for me   Click here to download

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I solved the problem after changing  ANDROID HOME  to the Environment variables and setting it to the location of your android SDK  in my case C  Android Sdk

User · Answer

There should be at least one device Simulator connected to run Flutter applications   Also make sure the USB debugging is enabled in developer settings

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This was my solution  Hope my confusion can help someone else too   My  Developer Options  was ON    but the  USB Debbugging  was OFF   So I turned ON the USB Debbugging and the problem was solved

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Check adb is running or not if not run using the below command  adb start server than adb devices  if adb is not installed in your machine  install it and run commands again

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I tried a lot of the recommended steps listed here but the only thing it helps me was this   File -  Settings -  Language  amp  Support -  Dart --    Activate the checkbox  Enable Dart support  for the project

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In Android Studio  you sometimes need to start the android emulator manually   In Android Studio  click on the android  AVD Manager  icon    Start your android device    Wait a few seconds and select your android device

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Sometimes you have everything perfect but the device is no longer authorized on ADB  In such cases you have ADB but It will not show you in connected devices   Steps to Fix this issue  1  Check if authorized  Open terminal cmd PowerShell and write adb devices it will show you all connected devices to PC    lt ANDROID SDK HOME gt  platform-tools gt adb devices List of devices attached 4df798d76f98cf6d        unauthorized   2  Revoke USB Debugging on phone  If the device is shown as unauthorized  go to the developer options on the phone and click  Revoke USB debugging authorization   tested with JellyBean  amp  Samsung GalaxyIII    3  Restart ADB Server   adb kill-server adb start-server   4  Reconnect Device and run following command again   adb devices  Now it should display authorized   5  Ready to go   Now  open you editor Android Studio Visual Studio Code and check if your device is showing in connected devices or not   You can simply check that with flutter doctor command

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just excute the below command in terminal before running  open -a Simulator

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Basically there are 3 common causes for this problem   1  You don t have the ADB drivers installed on your computer  Make sure         you have the correct ADB drivers for your Android device installed         on your PC    Even if your computer reads your device  You may not         have the ADB drivers installed  I recommend that you search and         download the correct ADB drivers for your Android device from Google         or download an ADB package  If you install an ADB and it doesn t         work  try installing another ADB  as it is common that not all ADBs         work    If you re in Windows  when you ve installed the correct ADB         drivers  maybe the S O  Run  Windows Update  to complete the ADB         installation   2  Your device does not have debugger mode enabled  It depends on each version of Android  generally on your Android device         you have         to go to the configuration menu  then open the developer options and         then activate the debugger mode and enable OEM unlocking and USB         debugger  ALSO MAKE SURE YOU ALLOW THE DEVELOPER TO SIGN ON YOUR         DEVICE  3  Incorrect cable or other physical problems  Sometimes the problems are caused by the data transfer cable  try using other             cables

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I had an emulator running but the VSC ide could not connect to it  So I enabled developer mode in the emulator and the debugging options as well  Voila  It worked

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This was my solution  Hope my confusion can help someone else too   My  Developer Options  was ON   but the  USB Debbugging  was OFF   So I turned ON the USB Debbugging and the problem was solved

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I solved the AVD problem with the flutter using the Flutter console   Step 1   C    Users   valer gt  flutter emulators 6 available emulators   3 2 QVGA ADP2 API 22  -  Lollipop     3 2in QVGA  ADP2      Generic     3 2 QVGA  ADP2  API 22 - Lollipop Android ARMv7a Android Accelerated x86 Nexus S API Google Nexus S API 23 Nexus S API 25 1080x1920 Nougart 7 1 1      pixel     Google     Nexus S API 25 1080x1920  Nougart 7 1 1  Pixel API 28     pixel     Google     Pixel API 28   To run an emulator  run flutter emulators --launch  lt emulator id gt    Step 2   C    Users   valer gt  flutter emulators --launch Pixel API 28

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I encounter the same problem as you did  It turns out that your device is not connected with your computer    Note    If you are using XCode  if both your computer and the device are using the same WIFI  you don t have to connect the device with the computer  For Android  or iOS running under terminal command  if you are using command line to run this  you have to make sure they are connected via cables  Sharing the same WIFI does not work  Make sure your device is really connected  Make sure you allowed USB Debugging on your android device    If this still does not work  try to fire below command  where you can get richer info and details   flutter run --verbose

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If you have already installed and set-up your emulator  but facing the issue during running your app  You can try these steps to fix this issue  Steps   Open Android Studio Tools - gt  AVD Manager Virtual Device - gt  Actions  Refer Image  Click On Stop Now Start Emulator  Note - If it s still not working  Try again the 4th step By Wiping your data  Hope this works 4 you

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Some times the issue is with the device connection and it s driver   if you already turned on the Developer Option and USB debugging and still unable to connect your Device   you must try this one as it s officially from GOOGLE   Install OEM USB drivers    https   developer android com studio run oem-usb

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None of the above solutions worked for me but I was able to solve it by invalidating catch and restarting my android studio   File  gt  Invalidate Catches   Restart

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I was using Visual Studio Code in Mac and was trying to run the flutter code on my iPhone  The device was not showing up in the status bar  I fixed the issue by doing this in the Terminal   rm -rf  lt flutter repo directory gt  bin cache flutter doctor -v   This will basically clear all the cache data from the Flutter repository folder  So when you run flutter doctor it will download some files initially

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Flutter needs a device to run the app  There are two choices for this     Run the app on your real phone  Run the app on a virtual device in your computer    I would recommend Option 1 because it doesn t use your device resources and is faster   Option 1   Unlock developer options on your phone  go to developer setting and turn on USB debugging and connect your phone to your computer  Now run flutter run and it will work   Option 2   Open android studio  go to AVD manager  Add a virtual device if you haven t done that yet  amp  run the virtual device  Now run flutter run again and it should work    Note that this way works with any virtual device and not just virtual device from android studio

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For window user   The solution for me was running Android Studio as administrator

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None of the suggestions worked until I ran  flutter config --android-sdk ANDROID SDK PATH  Use  quot PATH quot    your path  For example  flutter config --android-sdk C  Users  youruser  AppData Local Android Sdk

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I have same problems while I was debugging with local flutter engine  In such case  if you have set environment variable FLUTTER ENGINE  you should unset it and restart you IDE

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Setting the Environment System variable  Variable          Value ANDROID HOME    D  Android Sdk Sdk  your path

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I am facing the same issue with Flutter  But I found another way to work i e    First run Android Emulator Then go to your Flutter Console Run the command flutter doctor  amp  check whether your emulator is showing under connected devices tag e g    Now move to your Flutter project path via Flutter console e g  for me it is D  FlutterWorkspace flutter demo Then run flutter run command  e g       Wait for few moments you will see your app running into Android Emulator

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open the termina in vs-code  write the below commands  flutter devices  flutter daemon -v  after that connect using cmd cd  adb folder   adb tcpip 4455 adb connect 192 168 1 11 4455  user your device IP

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You could try  flutter emulators to show a  list of already created emulators   Today this shows me the two emulators in the list below      Nexus 6 API 27     Nexus 6 API 27     Google     android      Pixel 2 API 27     Pixel 2 API 27     Google     android   You can then use something like  flutter emulators --launch Nexus 6 API 2 to start the emulator of choice  You can then use flutter run to test your app   I use VSCode and tend to do use this approach which saves me having to load Android Studio to launch an emulator   I hope this helps

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I found that my antivirus Avast  had quarantined the adb exe file  I went to Avast -  protection -  virus chest  Removed the adb exe file from the list    Then added the Android home variable   added it to the path variable  Restarted my machine and Android Studio picked up the device emulator

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In my case  flutter devices showed my device correctly and flutter run worked as expected  but the device is not shown in Android Studio   Here is my sulotion   in my  bash profile  the Android SDK configed like this   export ANDROID SDK ROOT    Library Android sdk    seems flutter plugin can not recgize the    so I changed it to this way   export ANDROID SDK ROOT   Users charliema Library Android sdk    reopen the Android Studio  it worked

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Try running android studio as administrator if your flutter sdk location is in the  C Drive

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For me it was   adding  ANDROID HOME  to the Environment variables and setting it to  D  dev android   for me  adding  D  dev android platform-tools   for me  to Path I put flutter there before Ok  Ok  Ok Restart Android studio

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I recently face the same problem  I am using mac os and ios simulator  flutter devices command shows No devices detected     Then i run the flutter doctor command and it says my xcode installation is incomplete       But its not true i verify it by building native ios app and it runs   well       I didn t reinstall download xcode again  just run that two commands according to their suggestions  sudo xcode-select --switch  Applications Xcode app Contacts Developer sudo xcodebuild -runFirstLaunch   And it solves my problem  Here is the final flutter doctor command output  Hope this will be helpful for someone

User · Answer

If your device was already connected successfully  and just suddenly stopped being recognized by flutter devices  and Android Studio for that matter   this worked for me    Turn USB debugging OFF Turn USB debugging back ON   Yup  This worked  For me

User · Answer

No one here mentions to make sure the Android device is not connected as  quot Media device quot  As soon as I turned this off and set it to  quot Charging quot  it worked  I obviously installed the USB driver through Android studio  and also went through a step of adding  quot adb quot  to my system path by adding the location of it to  quot PATH quot

User · Answer

This is my Solution  First Connect the Device to the Laptop and in mobile Open Settings of the smartphone and search for Developer Options and click on it and Enable USB Debugging on your device  Then Open the project and open the terminal and type  flutter run  By doing so your device is recognized  Then Setup your Android Emulator  In Android Studio  at the top  there will be no devices option and click on that and proceed to select your device and wait for a few minutes and you can see your app on your smartphone or on the emulator as per your selected Android Emulator

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Please check if you have two Android versions installed  if yes uninstall it as two versions can   t run at the same time  Also  you may try to set android-sdk in the flutter config where you can deploy directly to devices from Android Studio

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What I needed to do   flutter emulators   It will list all available emulators  For iOS you will need to open simulator first   flutter emulators --launch EMULATOR NAME   This will launch the emulator  And to build it  flutter run -d  EMULATOR ID

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For window user   Set environment variable of Flutter SDK     flutter windows v0 2 8-beta zip flutter bin   No device connect  For more information  you can check here http   www developerlibs com 2018 05 flutter-introduction-and-setup html  Here is the info from the mentioned page  Add Flutter to Windows Environment variable Path   Navigate in to Flutter SDK folder  Go inside to bin folder and copy  the directory path  in your case C  Flutter bin  Go to    Control Panel   User Accounts   User Accounts   Change my environment variables    Under    User variables    select path variable and click edit  Put C  Flutter bin and apply    Same as Flutter Environment   we have to set the Android SDK path if it is on custom location    Navigate into the Android SDK folder  Copy  the directory path  in your case   AndroidStudioSDK sdk  Go to    Control Panel   User Accounts   User Accounts   Change my environment variables    Under    User variables    select path variable and click edit  Put   AndroidStudioSDK sdk with ANDROID HOME and apply    Tips   If you facing the following issue   1     Android toolchain - develop for Android devices        Unable to locate Android SDK        Install Android Studio from https   developer android com studio index html       On the first launch  it will assist you in installing the Android SDK components         or visit https   flutter io setup  android-setup for detailed instructions    If Android SDK has been installed to a custom location  set  ANDROID HOME to that location   You can resolve it with the following command   flutter config --android-sdk  lt android-sdk-location gt             OR flutter config --android-sdk  android-sdk-location    Error  Unknown argument --licenses   You can resolve it with Following Command   flutter -v doctor --android-licenses  Now  Pick the emulator you want to use and click the green arrow to run the project  So  here default screen that is already designed

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in iOS with mac  when i got this error  this works for me    open -a simulators flutter run

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If there is a problem with ADB Interface driver     Try to find an appropriate driver on manufacturer s web-site  For Intel read this Installing the Android Debug Bridge  ADB  USB Driver on a Windows Computer

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While using in windows 7  I had received an error  unable to install device drivers  And the device wasn t recognised    You need to also install Android OEM device driver for the particular device  just like mentioned here   I downloaded driver for device from the manufacturer s website and installed driver from device manager

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Just my case  I haven t found this solution among the answers   System  Android 10 device   Mac with MacOS Mojave 10 14 6  18G4032    Developer options and USB debugging were enabled on my Android device   Flutter SDK was installed on my Mac   Problem  When the Android device had been connected to my Mac with the USB cable the flutter devices command still stated  No devices available   Solution  Fortunately  my Android device showed me the popup with the suggestion to install Android File Transfer to my Mac   After installing the Android File Transfer to my Mac the flutter devices command showed my Android device as connected   Hope this helps someone

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Flutter supports both iOS and Android device simulators      In terminal  run the flutter devices command to verify that Flutter recognizes your connected Android device    Here is a reference document  How you can setup Device Simulator to run your application   For  Android  on mac system   Set up your Android device  To prepare to run and test your Flutter app on an Android device  you   ll need an Android device running Android 4 1  API level 16  or higher    Enable Developer options and USB debugging on your device  Detailed instructions are available in the Android documentation  Using a USB cable  plug your phone into your computer  If prompted on your device  authorize your computer to access your device  In the terminal  run the flutter devices command to verify that Flutter recognizes your connected Android device  Start your app by running flutter run    By default  Flutter uses the version of the Android SDK where your adb tool is based  If you want Flutter to use a different installation of the Android SDK  you must set the ANDROID HOME environment variable to that installation directory   Set up the Android emulator  To prepare to run and test your Flutter app on the Android emulator  follow these steps    Enable VM acceleration on your machine  Launch Android Studio Tools Android AVD Manager and select Create Virtual Device  Choose a device definition and select Next  Select one or more system images for the Android versions you want to emulate  and select Next  An x86 or x86 64 image is recommended  Under Emulated Performance  select Hardware - GLES 2 0 to enable hardware acceleration  Verify the AVD configuration is correct  and select Finish   For details on the above steps  see Managing AVDs  In Android Virtual Device Manager  click Run in the toolbar  The emulator starts up and displays the default canvas for your selected OS version and device  Start your app by running flutter run  The connected device name is Android SDK built for   where platform is the chip family  such as x86    -   Here is another document  if you re using  Microsoft  Windows System  Get Started  Install on Windows   Open  amp  Connect Device using Android Studio   Here is an easier way to open and connect simulators devices   Android Studio shows a list of emulators simulators  installed in your system  or devices  connected to your system   Just select a device  you want to open  from a list  and run project

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In case you want to test you app on your physical device via WiFi   1   Connect your device via USB  make sure developer options and USB debugging is enabled  2   Type in your Android Studio terminal  adb tcpip 5555 3   Remove USB connection 4   Type in your Android Studio terminal  adb connect  lt ip address of your device gt   Alternatively  you can use WiFi ADB extension for Android Studio  I don t know any similar extension for VS Code

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STEP 1  To check the connected devices  run  flutter devices  STEP 2  If there are no connected devices to see the list of available emulators  run  flutter emulators  STEP 3  To run an emulator  run  flutter emulators --launch  lt emulator id gt   STEP 4  If there is no available emulator  run  flutter emulators --create  --name xyz       FOR ANDROID    STEP 1  To check the list of emulators  run  emulator -list-avds  STEP 2  Now to launch the emulator  run  emulator -avd avd name      FOR IOS    STEP 1  open -a simulator   STEP 2  flutter run  In your app directory    I hope this will solve your problem

User · Answer

One option that I haven t see mentioned so far is that  for my setup  the Developer Option  Select USB Configuration  must be set to MTP  Media Transfer Protocol

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Well  This query has been answered  I just wanted to add that You can see connected devices if you start the simulator manually on MAC and Android emulator from AVD manager as well

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The actual answer did not worked for me   But setting ANDROID HOME in you    bash profile and logout then login  make it work   This may be an Android Studio issue since It is not setting this environment variable for the open projects

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I am using Linux so here are the step can help  First open studio with root permission    window   Right-click the program icon    Choose Run As Administrator  linux   sudo   studio sh in terminal   Create emulator with Hardware - GLES 2 0 in hardware acceleration as mentioned here  Open terminal in android studio  Alt F12   Run command flutter devices and see the list devices  root abc-OptiPlex-3050   flutter workspace my app my app  flutter devices    Woah  You appear to be trying to run flutter as root     We strongly recommend running the flutter tool without superuser privileges   1 connected device   Android SDK built for x86     emulator-5554     android-x86      Android 8 1 0  API 27  emulator    Finally run from terminal flutter run  root abc-OptiPlex-3050   flutter workspace my app my app  flutter run    Woah  You appear to be trying to run flutter as root     We strongly recommend running the flutter tool without superuser privileges    Using hardware rendering with device Android SDK built for x86   If you get graphics artifacts  consider enabling software rendering  with  --enable-software-rendering   Launching lib main dart on Android SDK built for x86 in debug mode    Initializing gradle                                          0 7s Resolving dependencies                                       1 2s Running  gradlew assembleDebug                               1 5s Built build app outputs apk debug app-debug apk  I FlutterActivityDelegate 25096   onResume setting current activity to this Syncing files to device Android SDK built for x86                 D          25096   HostConnection  get   New Host Connection established  0xe8487780  tid 25116 D EGL emulation 25096   eglMakeCurrent  0xe5b3d8a0  ver 2 0  tinfo 0xe84832f0     To hot reload changes while running  press  r   To hot restart  and  rebuild state  press  R  An Observatory debugger and profiler on  Android SDK built for x86 is available at  http   127 0 0 1 8100  For a more detailed help message  press  h   To quit  press  q     And do check flutter-sdk path in your project Configure from this answer

User · Answer

Follow these step   File -  Project Structure -  Project SDK Select the SDK Path in the Android SDK  -  OK  Make sure your device is connected to the PC   Open GitBash and type  flutter devices  Then run your flutter app It will work

User · Answer

If you are using mobile     Turn on your developer options  Turn on USB debugging option

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NOTE  I am using Mi Xiaomi  mobile  Redmi K20 Pro  which is running on Android 10  You need to do 2 things to show your device listing   1  Go to your Android Studio --  File --  Project Structure and choose Project SDK from the options  I chose the latest one from the menu   2  When you connect your real device to your PC Laptop  make sure you choose Transfer photos  PTP  mode    NOTE  DON T CHOOSE File transfer mode  It will not work   After doing the above 2 things  you can check the status of your device availability by writing flutter devices on command prompt   I hope it shows your mobile device

User · Answer

I had the same issue  Setting up the Android SDK is also a correct answer  But this is very simple -   Import an android project to a new Android studio window  Close your current Flutter project Android studio window  Import that Flutter project to new Android Studio window

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If you are using Windows  press Control Alt Delete and select Dart Task inside Android Studio  amp  Click End Task   I tried many times it works

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I ran mine with Genymotion  probably the best for Flutter   Setting up is less painful and   Make sure setting ADB under     --YOUR ANDROID SDK PATH --  Mine is  C  Users user AppData Local Android Sdk

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If the emulator is running and is not being detected by the flutter and adb devices then try connecting it manually by using the following command     abd connect 127 0 0 1 62001   If it fails to connect  try again  The following message should appear     connected to 127 0 0 1 62001   Then try flutter doctor or adb devices to make sure it has been connected successfully

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In my case  File Project Structure  select latest sdk

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flutter config --android-sdk ANDROID SDK PATH  OR   Device Not Found  When setup Flutter in android studio  Project structure -  select latest ANDROID API in Project SDK

[android] flutter run: No connected devices

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