React-native: Failed when using externally connected Android device while starting react native project

[iroshanAV]

I got this error when i entered react-native run-android ,

Building and installing the app on the device (cd android && gradlew.bat installDebug...
:app:preBuild UP-TO-DATE
:app:preDebugBuild UP-TO-DATE
:app:checkDebugManifest
:app:preReleaseBuild UP-TO-DATE
:app:prepareComAndroidSupportAppcompatV72301Library UP-TO-DATE
:app:prepareComAndroidSupportRecyclerviewV72340Library UP-TO-DATE
:app:prepareComAndroidSupportSupportV42340Library UP-TO-DATE
:app:prepareComFacebookFbuiTextlayoutbuilderTextlayoutbuilder100Library UP-TO-DATE
:app:prepareComFacebookFrescoDrawee0110Library UP-TO-DATE
:app:prepareComFacebookFrescoFbcore0110Library UP-TO-DATE
:app:prepareComFacebookFrescoFresco0110Library UP-TO-DATE
:app:prepareComFacebookFrescoImagepipeline0110Library UP-TO-DATE
:app:prepareComFacebookFrescoImagepipelineBase0110Library UP-TO-DATE
:app:prepareComFacebookFrescoImagepipelineOkhttp30110Library UP-TO-DATE
:app:prepareComFacebookReactReactNative0411Library UP-TO-DATE
:app:prepareComFacebookSoloaderSoloader010Library UP-TO-DATE
:app:prepareOrgWebkitAndroidJscR174650Library UP-TO-DATE
:app:prepareDebugDependencies
:app:compileDebugAidl UP-TO-DATE
:app:compileDebugRenderscript UP-TO-DATE
:app:generateDebugBuildConfig UP-TO-DATE
:app:generateDebugAssets UP-TO-DATE
:app:mergeDebugAssets UP-TO-DATE
:app:generateDebugResValues UP-TO-DATE
:app:generateDebugResources UP-TO-DATE
:app:mergeDebugResources UP-TO-DATE
:app:bundleDebugJsAndAssets SKIPPED
:app:processDebugManifest UP-TO-DATE
:app:processDebugResources UP-TO-DATE
:app:generateDebugSources UP-TO-DATE
:app:processDebugJavaRes UP-TO-DATE
:app:compileDebugJavaWithJavac UP-TO-DATE
:app:compileDebugNdk UP-TO-DATE
:app:compileDebugSources UP-TO-DATE
:app:preDexDebug UP-TO-DATE
:app:dexDebug UP-TO-DATE
:app:validateDebugSigning
:app:packageDebug UP-TO-DATE
:app:zipalignDebug UP-TO-DATE
:app:assembleDebug UP-TO-DATE
:app:installDebug
Skipping device '48133829dc7c124e' (48133829dc7c124e): Device is UNAUTHORIZED,
    see http://d.android.com/tools/help/adb.html#Enabling.
:app:installDebug FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:installDebug'.
> com.android.builder.testing.api.DeviceException: No online devices found.

* 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: 17.483 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

When i made cmd command adb devices, i got result as,

F:\Experiments\React TuT\Social App>adb devices
List of devices attached
48133829dc7c124e        unauthorized

How can i solve this error?
I'm using Windows 10 OS, using external USB device(Samsung Duos 2)

[chunecai]

me too. same error.

[Swordsman-Inaction]

It's not related to React Native. It's a connection issue between adb and devices. Try this

[iroshanAV]

@Swordsman-Inaction At last an answer :)

[ACID-AndroidCompatibilityIssuesDetector]

Try this steps:

1. unplug device
2. adb kill-server
3. adb start-server
4. plug device

[appsgit1]

run chmod 755 android/gradlew

inside your app root folder
then run
react-native run-android

[mklb]

I got an "device offline error" after these suggestions above.
The fixe here is to stop the virtual device. Open the AVD Manager. In the AVD Manager view: Select the arrow down of the devices "actions" section (right hand side). Click "Wipe Data". Done ;)

[rubelhasan]

@mklb Your solution is work for me.