Unable to run a Flutter app because <no devices> even Device File Explorer can detect it

[pcdinh]

Description

I plugged my device to my development laptop to run a Flutter app. My laptop is already allowed to connect to my mobile device.

However, the button Run does not allow me to deploy the app to the connected device because it thinks that there is no connected device. It is quite wrong. The tab Device File Explorer can browse files in the device already.

The flutter CLI tool can detect the connected device too

C:\Users\pcdinh>flutter upgrade
Upgrading Flutter from D:\dev\flutter...
From https://github.com/flutter/flutter
   0260642fc..1c3f6a851  master     -> origin/master
Updating 0260642fc..1c3f6a851
 2 files changed, 31 insertions(+), 1 deletion(-)

Upgrading engine...
Updating flutter tool...
Already up-to-date.

Flutter 0.2.12-pre.29 • channel master • https://github.com/flutter/flutter.git
Framework • revision 0260642fc5 (6 hours ago) • 2018-04-12 21:16:39 -0700
Engine • revision 76cb311d9c
Tools • Dart 2.0.0-dev.47.0.flutter-f76dad0adc

Running flutter doctor...
Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel master, v0.2.12-pre.30, on Microsoft Windows [Version 10.0.16299.309], locale en-US)
[!] Android toolchain - develop for Android devices (Android SDK 27.0.3)
    X Android license status unknown.
[√] Android Studio (version 3.1)
[√] IntelliJ IDEA Community Edition (version 2017.3)
[√] VS Code, 64-bit edition (version 1.22.1)
[√] Connected devices (1 available)

! Doctor found issues in 1 category.

Steps to Reproduce

• Launch Android Studio with the latest Flutter plugin
• Edit code
• Plugin the device and ensure that the device is connected.
• Press "Run" icon. The dialog appears: "No connected devices found; please connect a device, or see flutter.io/setup for getting started instructions."'. However, the tab Device File Explorer can see files in the device.

Screenshot: https://imgur.com/a/qEJrR

Version info

D:\dev\flutter\bin\flutter.bat --no-color doctor
Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel master, v0.2.12-pre.30, on Microsoft Windows [Version 10.0.16299.309], locale en-US)
[!] Android toolchain - develop for Android devices (Android SDK 27.0.3)
    X Android license status unknown.
[√] Android Studio (version 3.1)
[√] IntelliJ IDEA Community Edition (version 2017.3)
[√] VS Code, 64-bit edition (version 1.22.1)
[√] Connected devices (1 available)

Android Studio 3.1.1

Flutter plugin 23.2.2

[pcdinh]

Exit and start Android Studio again can solve the issue

[pq]

Does this happen consistently? Does it get discovered after being unplugged and reconnected?

Thanks for the report!

[stevemessick]

Flutter doctor says

[!] Android toolchain - develop for Android devices (Android SDK 27.0.3)
    X Android license status unknown.

Fix that by doing this

flutter doctor --android-licenses

[edman]

I have the same problem on Android Studio 3.1, and Intellij 2018.1. flutter does recognize, build and install the apk on my device, but never managed to get it working on the IDE.

This happens on my linux machine, on my mac os laptop it works as expected.

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel border, v0.5.2-pre.70, on Linux, locale en_US.UTF-8)
[✓] Android toolchain - develop for Android devices (Android SDK 27.0.3)
[✓] Android Studio (version 3.1)
[✓] Android Studio (version 3.0)
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
[✓] IntelliJ IDEA Community Edition (version 2018.1)
[✓] Connected devices (1 available)

• No issues found!

[caveligh]

I had the same problem and I resolved uninstalling Android Studio (version 3.0). The two versions can not exist at the same time.

[hbwangzhen]

My android project can connect my phone , but The Flutter project can't connect my phone. show "no devices"

[Cxuef]

The same issue ! I can see my device using this command:

eirot@eirot-Precision-T1700:~/flutter_sdk_linux/flutter/bin$ ./flutter devices
1 connected device:

SUGAR S20 • 3bc622a8 • android-arm64 • Android 8.1.0 (API 27)

And can also use "flutter run" command to install flutter app successfully, but Android studio still show "".

Android studio version :
Android Studio 3.1.3
Build #AI-173.4819257, built on June 5, 2018

flutter plugin version :
Version: 26.0.1

flutter sdk version :
flutter_linux_v0.5.6-dev.tar

[ojhero]

My android project can connect my phone , but The Flutter project can't connect my phone. show "no devices"

[TheHasnatBD]

I have the same problem on Ubuntu