stuck at Running Gradle task 'assembleDebug'

Question

i'm runing Pop_OS! 20.10

flutter doctor -v

[✓] Flutter (Channel stable, 1.22.3, on Linux, locale en_US.UTF-8) • Flutter version 1.22.3 at /home/samdc/DevTools/flutter • Framework revision 8874f21 (3 months ago), 2020-10-29 14:14:35 -0700 • Engine revision a1440ca392 • Dart version 2.10.3 • Pub download mirror https://pub.flutter-io.cn • Flutter download mirror https://storage.flutter-io.cn

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3) • Android SDK at /home/samdc/DevTools/Android/SDK • Platform android-30, build-tools 30.0.3 • Java binary at: /opt/android-studio/jre/bin/java • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593) • All Android licenses accepted.

[!] Android Studio • Android Studio at /opt/android-studio ✗ Flutter plugin not installed; this adds Flutter specific functionality. ✗ Dart plugin not installed; this adds Dart specific functionality. • android-studio-dir = /opt/android-studio • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)

[✓] VS Code (version 1.52.1) • VS Code at /usr/share/code • Flutter extension version 3.18.1

[✓] Connected device (1 available) • Google Nexus 5 (mobile) • 192.168.56.101:5555 • android-x86 • Android 5.1 (API 22)

dart --version

Dart SDK version: 2.10.3 (stable) (Tue Oct 27 14:44:30 2020 +0100) on "linux_x64"

java --version

openjdk 14.0.2 2020-07-14 OpenJDK Runtime Environment (build 14.0.2+12-Ubuntu-1) OpenJDK 64-Bit Server VM (build 14.0.2+12-Ubuntu-1, mixed mode, sharing)

gradle -v

Gradle 6.8

Build time: 2021-01-08 16:38:46 UTC
Revision: b7e82460c5373e194fb478a998c4fcfe7da53a7e

Kotlin: 1.4.20
Groovy: 2.5.12
Ant: Apache Ant(TM) version 1.10.9 compiled on September 27 2020
JVM: 14.0.2 (Private Build 14.0.2+12-Ubuntu-1)
OS: Linux 5.8.0-7630-generic amd64

When i try to run flutter app from terminal using flutter run i get this massege

Launching lib/main.dart on Google Nexus 5 in debug mode...
Running Gradle task 'assembleDebug'...

and it will be stuck forever .

and as the emulator i'm using genymotion and i'm using VPN because my country is banned from using google services , and the internet speed is unstable . and also i tried to run the app from VS Code with no luck . i've been trying to install flutter for 2 weeks with no luck , hope find the solution

things i tried : flutter clean I have changed the Gradle wrapper properties distribution URL version to: 6.8-all

Edit : afyer a while of waiting the flutter run command throw this error

Launching lib/main.dart on Google Nexus 5 in debug mode... Running Gradle task 'assembleDebug'...
Exception in thread "main" java.util.zip.ZipException: error in opening zip file Running Gradle task 'assembleDebug'...
at java.util.zip.ZipFile.open(Native Method) Running Gradle task 'assembleDebug'...
at java.util.zip.ZipFile.(ZipFile.java:225) Running Gradle task 'assembleDebug'...
at java.util.zip.ZipFile.(ZipFile.java:155) Running Gradle task 'assembleDebug'...
at java.util.zip.ZipFile.(ZipFile.java:169) Running Gradle task 'assembleDebug'...
at org.gradle.wrapper.Install.unzip(Install.java:214) Running Gradle task 'assembleDebug'...
at org.gradle.wrapper.Install.access$600(Install.java:27) Running Gradle task 'assembleDebug'...
at org.gradle.wrapper.Install$1.call(Install.java:74) Running Gradle task 'assembleDebug'...
at org.gradle.wrapper.Install$1.call(Install.java:48) Running Gradle task 'assembleDebug'...
at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:65) Running Gradle task 'assembleDebug'...
at org.gradle.wrapper.Install.createDist(Install.java:48) Running Gradle task 'assembleDebug'...
at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:128) Running Gradle task 'assembleDebug'...
at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61) Running Gradle task 'assembleDebug'...
Running Gradle task 'assembleDebug'... Done
470.0s (!) [!] Gradle threw an error while downloading artifacts from the network. Retrying to download... Exception in thread "main" java.util.zip.ZipException: error in opening zip file at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.(ZipFile.java:225)
at java.util.zip.ZipFile.(ZipFile.java:155)
at java.util.zip.ZipFile.(ZipFile.java:169)
at org.gradle.wrapper.Install.unzip(Install.java:214)
at org.gradle.wrapper.Install.access$600(Install.java:27)
at org.gradle.wrapper.Install$1.call(Install.java:74)
at org.gradle.wrapper.Install$1.call(Install.java:48)
at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:65) at org.gradle.wrapper.Install.createDist(Install.java:48)
at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:128) at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61) Running Gradle task 'assembleDebug'...
Running Gradle task 'assembleDebug'... Done
0.2s [!] Gradle threw an error while downloading artifacts from the network. Retrying to download... Exception: Gradle task assembleDebug failed with exit code 1

Answer 1

I have dealt with this exact issue in the past, what worked for me was I uninstalled flutter sdk, android studio and all the elements I installed related to flutter and repeated the process of installing flutter and all of the components it requires. If this does not work, I suggest not using the emulator but using a physical device to run your code.