Can't launch my react-native app on my phone with adb

Ok so here’s the situation.

I’m working on an application in react-native. So far, I used my phone to see how it works. using react-native start then react-native run-android

But when i do react-native run-android here is what I get

My environmment infos:

System: OS: Linux 5.3 Ubuntu 19.10 (Eoan Ermine) CPU: (4) x64 Intel® Core™ i7-6500U CPU @ 2.50GHz Memory: 119.08 MB / 7.66 GB Shell: 5.7.1 - /usr/bin/zsh Binaries: Node: 12.16.3 - /usr/bin/node Yarn: Not Found npm: 6.14.4 - /usr/bin/npm Watchman: Not Found SDKs: Android SDK: Not Found IDEs: Android Studio: Not Found Languages: Java: 11.0.7 - /usr/bin/javac Python: 2.7.17 - /usr/bin/python npmPackages: @react-native-community/cli: Not Found react: 16.11.0 => 16.11.0 react-native: 0.62.2 => 0.62.2 npmGlobalPackages: react-native: Not Found

I tried to do adb kill-server and adb devices. It works and when I do so, in the list of devices there is my phone.

But for some reasons, when it come to react-native run-android it won’t work.

I can install the app with react-native run-android when I first boot my computer, but react-native start will gave me the 8081 port error. I followed the steps as said in the documentation:

• sudo lsof -i :8081
• kill -9 <PID>

It’s at this moment that I can’t run react-native run-android.

The most disturbing thing is that a few hours ago, it worked perfectly. How can I fiw this problem ?

[Anzormumladze]

Try this one cd android && ./gradlew clean

[PauloHCardosoN]

Try this one cd android && ./gradlew clean

Thank you, that’s worked 💜