Develop Reference

Flutter - cannot run android app (build failed with exception)

I'm unable to run newly created flutter projects on any android device. I've tried a fresh install of the android sdk but still getting the same error message. I've tried the same process on a different machine and everything works fine.
The error message:
Launching lib\main.dart on SM G781B in debug mode...
Running Gradle task 'assembleDebug'...
Parameter format not correct -
FAILURE: Build failed with an exception.
What went wrong:
Execution failed for task ':app:processDebugResources'.
A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$ActionFacade
Android resource linking failed
AAPT: error: failed writing to 'C:\Users\Rhys\Documents\Dev Projects\Flutter\flutter_app_test\untitled\build\app\intermediates\runtime_symbol_list\debug\R.txt': The data is invalid. (13).
Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
Get more help at https://help.gradle.org
BUILD FAILED in 4s
Exception: Gradle task assembleDebug failed with exit code 1
Running flutter doctor
SDK's installed:
SDK tools:
Does anybody have any suggestions at all? I'm not sure what else to try at this point

Error when trying to run an android app that uses react-native-camera

Hi i'm trying to use the camera with react-native-camera in react native but when i run the app it shows this error
info Running jetifier to migrate libraries to AndroidX. You can disable it using "--no-jetifier" flag.
Jetifier found 1165 file(s) to forward-jetify. Using 8 workers...
info JS server already running.
info Launching emulator...
error Failed to launch emulator. Reason: Emulator exited before boot..
warn Please launch an emulator manually or connect a device. Otherwise app may fail to launch.
info Installing the app...
> Task :react-native-camera:compileMlkitDebugJavaWithJavac FAILED
Deprecated Gradle features were used in this build, making it incompatible with Gradle 7.0.
Use '--warning-mode all' to show the individual deprecation warnings.
See https://docs.gradle.org/6.9/userguide/command_line_interface.html#sec:command_line_warnings
98 actionable tasks: 2 executed, 96 up-to-date
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':react-native-camera:compileMlkitDebugJavaWithJavac'.
> Could not find tools.jar. Please check that /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home contains a valid JDK installation.
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 10s
error Failed to install the app. Make sure you have the Android development environment set up: https://reactnative.dev/docs/environment-setup.
Error: Command failed: ./gradlew app:installDebug -PreactNativeDevServerPort=8081
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':react-native-camera:compileMlkitDebugJavaWithJavac'.
> Could not find tools.jar. Please check that /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home contains a valid JDK installation.
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 10s
at makeError (/Users/calebgarcia/Dev/Tibeo/node_modules/#react-native-community/cli-platform-android/node_modules/execa/index.js:174:9)
at /Users/calebgarcia/Dev/Tibeo/node_modules/#react-native-community/cli-platform-android/node_modules/execa/index.js:278:16
at processTicksAndRejections (node:internal/process/task_queues:96:5)
at async runOnAllDevices (/Users/calebgarcia/Dev/Tibeo/node_modules/#react-native-community/cli-platform-android/build/commands/runAndroid/runOnAllDevices.js:109:5)
at async Command.handleAction (/Users/calebgarcia/Dev/Tibeo/node_modules/#react-native-community/cli/build/index.js:192:9)
info Run CLI with --verbose flag for more details.
I've had a lot of problems when trying to run the react native apps on android but in ios they run perfectly.
Do you guys have any idea how can i solve the error.
Thanks

firstly check whether what jdk version you have installed (got to terminal and check by java --version)
make sure u have added that jre path to your environment variables
if these condition already u have done then follow below link
[https://dev.to/larrydanny/could-not-find-tools-jar-4363][1]
your proble will be solved....

React Native not detecting Android emulator

When I do react-native run-android I get this error:
info Running jetifier to migrate libraries to AndroidX. You can disable it using "--no-jetifier" flag.
Jetifier found 960 file(s) to forward-jetify. Using 6 workers...
info Starting JS server...
/bin/sh: 1: adb: not found
info Launching emulator...
error Failed to launch emulator. Reason: No emulators found as an output of `emulator -list-avds`.
warn Please launch an emulator manually or connect a device. Otherwise app may fail to launch.
info Installing the app...
Deprecated Gradle features were used in this build, making it incompatible with Gradle 7.0.
Use '--warning-mode all' to show the individual deprecation warnings.
See https://docs.gradle.org/6.0.1/userguide/command_line_interface.html#sec:command_line_warnings
FAILURE: Build failed with an exception.
* What went wrong:
Task 'installDebug' not found in project ':app'.
* Try:
Run gradlew tasks to get a list of available tasks. Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 4s
error Failed to install the app. Make sure you have the Android development environment set up: https://reactnative.dev/docs/environment-setup. Run CLI with --verbose flag for more details.
Error: Command failed: ./gradlew app:installDebug -PreactNativeDevServerPort=8081
FAILURE: Build failed with an exception.
* What went wrong:
Task 'installDebug' not found in project ':app'.
* Try:
Run gradlew tasks to get a list of available tasks. Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
I dont get it, before I run my React Native app I open the Android emulator first. I also noticed that my android studio doesn't have 'configure' on welcome page, so I have to start a project if I want to acces the sdk manager and avd manager.

Try in the same terminal that you put npx react-native run-android , set environment variables again like :
source $HOME/.zprofile (if you use zsh)
source $HOME/.bash_profile (if you use bash)

How to fix if the react native android build is failed?

I am very new to React native app developer. Please help me to fix the below issue
I am facing the below issues while executing react-native run-android.
info Running jetifier to migrate libraries to AndroidX. You can disable it using "--no-jetifier" flag.
Jetifier found 1112 file(s) to forward-jetify. Using 8 workers...
info Starting JS server...
'adb' is not recognized as an internal or external command,
operable program or batch file.
info Launching emulator...
error Failed to launch emulator. Reason: No emulators found as an output of emulator -list-avds.
warn Please launch an emulator manually or connect a device. Otherwise app may fail to launch.
info Installing the app...
Starting a Gradle Daemon (subsequent builds will be faster)
Task :app:processDebugResources FAILED
Deprecated Gradle features were used in this build, making it incompatible with Gradle 7.0.
Use '--warning-mode all' to show the individual deprecation warnings.
See https://docs.gradle.org/6.0.1/userguide/command_line_interface.html#sec:command_line_warnings
92 actionable tasks: 4 executed, 88 up-to-date
FAILURE: Build failed with an exception.
What went wrong:
Execution failed for task ':app:processDebugResources'.
A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$ActionFacade
Unable to delete directory 'E:\React Native\RNProjects\AHHCSTAFF\android\app\build\generated\not_namespaced_r_class_sources\debug\r\androidx\appcompat' after 10 attempts
Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
Get more help at https://help.gradle.org
BUILD FAILED in 43s
error Failed to install the app. Make sure you have the Android development environment set up: https://reactnative.dev/docs/getting-started.html#android-development-environment. Run CLI with --verbose flag for more details.
Error: Command failed: gradlew.bat app:installDebug -PreactNativeDevServerPort=8081
FAILURE: Build failed with an exception.
What went wrong:
Execution failed for task ':app:processDebugResources'.
A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$ActionFacade
Unable to delete directory 'E:\React Native\RNProjects\AHHCSTAFF\android\app\build\generated\not_namespaced_r_class_sources\debug\r\androidx\appcompat' after 10 attempts
Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
Get more help at https://help.gradle.org
BUILD FAILED in 43s
at makeError (E:\React Native\RNProjects\AHHCSTAFF\node_modules\execa\index.js:174:9)
at E:\React Native\RNProjects\AHHCSTAFF\node_modules\execa\index.js:278:16
at processTicksAndRejections (internal/process/task_queues.js:97:5)
at async runOnAllDevices (E:\React Native\RNProjects\AHHCSTAFF\node_modules\#react-native-community\cli-platform-android\build\commands\runAndroid\runOnAllDevices.js:94:5)
at async Command.handleAction (E:\React Native\RNProjects\AHHCSTAFF\node_modules\react-native\node_modules\#react-native-community\cli\build\index.js:186:9)
I dont know how to fix all the above issues

I have met this error logs before. Here are my resolve steps:(executing in progect root dictory)
cd android
gradlew clean
And run yarn android,it works well.By the way,my RN version is 0.62. You can have a try.

Emulator is not working: Execution failed for task ':app:installDebug'

First I'm a newbie in react-native. I start a React-native in Facebook official site react-native tutorial. When I follow the react-native android setup step by step, then I run this project When a show this message please Resolve this Error, and Suggest me. Please help me.
D:\Linux\IDE\All-Workspace\JavaScript-Workspace\React-Workshop\AwesomeProject>react-native run-android
JS server already running.
Building and installing the app on the device (cd android && gradlew.bat install debug)...
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:installDebug'.
> com.android.builder.testing.api.DeviceException: No connected devices!
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 6s
27 actionable tasks: 1 executed, 26 up-to-date
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/getting-started.

Emulator frozen in same state even after reboot etc..?
Follow Steps:
Open Android Studio
Open Configure
Open AVD Manager
There should be an emulator which is causing the issue - (if not create a new emulator an test build).
Go to down arrow in Actions and Select Stop
Same again in Actions but this time select Cold Boot Now
This works for me whenever ive had issues with an emulator.