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Could not resolve com.stripe:stripe-android:20.12.+. in Flutter project

Earlier my project was running without error but today i am getting following error. I would appreciate if anyone can help to get out of this issue.
Note- I am not using jCenter in my app, payment sdk flutter_stripe using jCenter
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:checkDebugAarMetadata'.
> Could not resolve all files for configuration ':app:debugRuntimeClasspath'.
> Could not resolve com.stripe:stripe-android:20.12.+.
Required by:
project :app > project :stripe_android
> Failed to list versions for com.stripe:stripe-android.
> Unable to load Maven meta-data from https://jcenter.bintray.com/com/stripe/stripe-android/maven-metadata.xml.
> Could not HEAD 'https://jcenter.bintray.com/com/stripe/stripe-android/maven-metadata.xml'.
> Read timed out
* 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 1m 47s
Exception: Gradle task assembleDebug failed with exit code 1

Here is a link to a solution in the flutter_stripe issue list
You need to add the following line inside app level build.gradle file:
constraints { implementation('com.stripe:stripe-android') { version { strictly '20.11.0' } } }
constraints { implementation('com.stripe:financial-connections') { version { strictly '20.11.0' } } }

I also had this problem and for two days I tried to figure out what the cause was. The problem is jcenter. Not so why it decided not to work. I solved it by replacing with mavenCentral in your project level build.gradle.
Reference: My flutter Android build broke all sudden with a gradle error, with no changes to the gradle configuration on my part
If you also have the "Stripe" plugin, you have to add this extension as well as the user indicated above

Jcenter seems down today.I guess you should switch to mavenCentral instead.

Flutter: Execution failed for task ':agora_rtc_engine:compileDebugKotlin'

I am working on an old project. It worked fine before 5 days ago. Now I am facing an error with agora. I didn't any change on my previous code.
here is error-
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':agora_rtc_engine:compileDebugKotlin'.
> Could not resolve all files for configuration ':agora_rtc_engine:debugCompileClasspath'.
> Could not find native-full-sdk-3.4.6.jar (com.github.agorabuilder:native-full-sdk:3.4.6).
Searched in the following locations:
https://www.jitpack.io/com/github/agorabuilder/native-full-sdk/3.4.6/native-full-sdk-3.4.6.jar
* 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 38s
Running Gradle task 'assembleDebug'... 40.0s
Exception: Gradle task assembleDebug failed with exit code 1
I am using agora_rtc_engine: ^3.3.1 bacause this project developed without null-safety (maybe flutter 1.5). How can I solve this problem ?

1.Run flutter upgrade in the terminal to upgrade Flutter
2.Run dart migrate to run the dart migration tool
3.Solve all errors which the migration tool shows
4.Run flutter pub outdated --mode=null-safety to print all outdated packages
5.Run flutter pub upgrade --null-safety to upgrade all packages automatically
6.Check the code for errors and solve them
7.Run dart migrate again and it should now be successful. Follow the link to checkout the proposed changes
8.Press the "Apply Migration" button
9.Check the code for errors again and fix them.
Run flutter run in the command line and the application should run...
Note: If there are any library in you project that don't support null safety you must need to upgrade that library. if that library don’t have null safety remove the library and use another library

So you have to migrate your project to null-safety first and then get
agora_rtc_engine: ^4.2.2
Then you to to your build.gradle and add that last line
allprojects {
repositories {
google()
jcenter()
// add this line.
maven { url ‘https://www.jitpack.io' }
}
}
Because following this issue here on GitHub there is no solution for it because this issue has been closed on the agora project.

For anyone who is still facing this issue
1: Run flutter pub outdated --mode=null-safety to check which dependencies are outdated
2: Run flutter pub upgrade --null-safety to upgrade all dependencies
3: It would update agora_rtc_engine to latest sdk, try to change that to agora_rtc_engine: 4.2.2
4: Set ext.kotlin_version = '1.6.10' in *build.gradle
Note: If you face any incompatibility with other packages for setting minSdk as 19, change minSdk to 19
5: If you faced any gradle error, you might need to change gradle-wrapper.properties
//add this line
distributionUrl=https://services.gradle.org/distributions/gradle-7.3.1-all.zip
Thats all

Android Execution failed for task ':app:compileDebugJavaWithJavac'. - React Native

I am working on a react native application. when I try to build the applications using react-native run-android the build fails. Here is the output of the error that occurs.
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.
* 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
Deprecated Gradle features were used in this build, making it incompatible with Gradle 6.0.
Use '--warning-mode all' to show the individual deprecation warnings.
See https://docs.gradle.org/5.4.1/userguide/command_line_interface.html#sec:command_line_warnings
BUILD FAILED in 8s
253 actionable tasks: 5 executed, 248 up-to-date
error 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.html
error Command failed: ./gradlew app:installDebug
debug Error: Command failed: ./gradlew app:installDebug
at checkExecSyncError (child_process.js:607:13)
at execFileSync (child_process.js:627:13)
at runOnAllDevices (/Users/FaisalHussain/mobile/node_modules/#react-native-community/cli/build/commands/runAndroid/runOnAllDevices.js:58:39)
at buildAndRun (/Users/FaisalHussain/mobile/node_modules/#react-native-community/cli/build/commands/runAndroid/runAndroid.js:142:41)
at then.result (/Users/FaisalHussain/mobile/node_modules/#react-native-community/cli/build/commands/runAndroid/runAndroid.js:104:12)
at <anonymous>
at process._tickCallback (internal/process/next_tick.js:189:7)
The application was on a old version of react native (0.48.x) I have updated it to 0.59.10.
What I have done so far:
used jetifier to resolve issues with the plugins.
checked that the build tools version matches the compile sdk version
checked if the emulator is running.
Hence I have tried everything I could to resolve this but had no luck. Please do guide me on how to resolve this issue. Looking forward to your answers.

make sure you have followed all the necessary steps from the upgrade helper https://react-native-community.github.io/upgrade-helper/?from=0.48.0&to=0.59.10
also i would suggest you to upgrade to v0.60+ because there are breaking changes after v0.59.10.
having said that
before you run the app make sure your gradle is clean
run the following command to clean your gradle cd android && ./gradle clean
then later you can navigate back to your app folder cd .. and try and run again react-native run-android

Looks like your packages not working stable with Android side. It's better be update all packages and react native version to their last stable versions.
If you face with too much error while update, you can create fresh new react native project (with same package name with your current project), install all packages (and their dependencies) and copy your current project's source code to your new project.

Android in React Native does not allow similar packages to reside in the project.
In my case I had react-native-cookies and #react-native-cookies/cookies packages that add similar code to the Kotlin file upon build. This causes issue of similar imports in java JDK.
I removed one and it worked.

SOLVED at the same issue:
My solution was at /android/build.gradle file.
Somehow, the buildscript versions were wrong.
Follow the exact same step of RN documentation and make a totally new & clean project.
And compate the /android/build.gradle file > buildscript & dependencies part.
There should be some version differences.
It matters by your own local env settings.
After changing buildToolsVersion, ndkVersion, classpath, it worked fine again!!
also, remove duplicated libraries, as #Nimantha said.

'com.github.triplet.play' Some problems were found with the configuration of task ':app:generateAppNameReleasePlayResources'

After i have updated android studio to 3.4.2 and gradle,
when i run this line
gradlew publishApkappNameRelease
im getting this error :
* What went wrong: Some problems were found with the configuration of task ':app:generateappNameReleasePlayResources'.
> File 'E:\Projects\packagename\app\src\main\play' specified for property '$1' does not exist.
> File 'E:\Projects\packagename\app\src\appName\play' specified for property '$2' does not exist.
> File 'E:\Projects\packagename\app\src\release\play' specified for property '$3' does not exist.
> File 'E:\Projects\packagename\app\src\appNameRelease\play' specified for property '$4' does not exist.
* 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
Deprecated Gradle features were used in this build, making it incompatible with Gradle 6.0. Use '--warning-mode all' to show the individual deprecation warnings. See https://docs.gradle.org/5.1.1/userguide/command_line_interface.html#sec:command_line_warnings
BUILD FAILED in 2m 47s 56 actionable tasks: 55 executed, 1 from cache
note: this line is used to auto publish apk using
apply plugin: 'com.github.triplet.play'
classpath 'com.github.triplet.gradle:play-publisher:1.1.5'
same when i run this command line gradlew --recompile-scripts i get error
Unknown command-line option '--recompile-scripts'
These commands were running fine before the updates.
UPDATE:
when i try to update the triplet.play to any of t hose versions (2.2.1 - 2.2.0 - 2.1.1 - 2.1.0 - 2.0.0 - 2.0.0-rc2) i get this error
Could not find com.github.triplet.gradle:play-publisher:2.2.1.
Searched in the following locations:
- https://dl.google.com/dl/android/maven2/com/github/triplet/gradle/play-publisher/2.2.1/play-publisher-2.2.1.pom
- https://dl.google.com/dl/android/maven2/com/github/triplet/gradle/play-publisher/2.2.1/play-publisher-2.2.1.jar
- https://jcenter.bintray.com/com/github/triplet/gradle/play-publisher/2.2.1/play-publisher-2.2.1.pom
- https://jcenter.bintray.com/com/github/triplet/gradle/play-publisher/2.2.1/play-publisher-2.2.1.jar
- https://repo.maven.apache.org/maven2/com/github/triplet/gradle/play-publisher/2.2.1/play-publisher-2.2.1.pom
- https://repo.maven.apache.org/maven2/com/github/triplet/gradle/play-publisher/2.2.1/play-publisher-2.2.1.jar
Required by:
project :

Apparently this can be fixed by upgrading the version of the play-publisher plugin from 1.1.5 to 2.1.1 as per the GitHub issue here: https://github.com/Triple-T/gradle-play-publisher/issues/532
However, it seems that the newer versions of the plugin aren't available on all artifact repositories. I found it here which has clear steps of doing it: https://plugins.gradle.org/plugin/com.github.triplet.play
Lastly it is advised that you check their GitHub page again to make sure that the config you currently have is still compatible: https://github.com/Triple-T/gradle-play-publisher
With regards to gradlew --recompile-scripts, this has been deprecated and removed in the new version since most of the times the gradle daemon is running and ignores this option. More info here: https://github.com/gradle/gradle/issues/1425

First, add a new repo to your repositories on build.gradle (Project)
repositories {
maven { url 'https://plugins.gradle.org/m2/' }
}
Now , upgrade your classpath.
classpath 'com.github.triplet.gradle:play-publisher:2.1.1'

Android Studio 0.8 Task assemble not found in root project

I m trying to build the iosched app on ubuntu 14.04 on android studio 0.8 . After importing the setting.gradle file and following the build instruction I get an error saying
Error
:FAILURE: Build failed with an exception.
* What went wrong:
Task 'assemble' not found in root project 'iosched'.
* Try:
Run gradle 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.
The solution mentioned in this post doesn't work either.

Try to add this: task assemble{} in your root build.gradle file.
According to this thread it helps (it helped me as well).

In my case, it was because my project implemented a Module that was an android-library (deprecated) / com.android.library which used a minSdkVersion lower than my project.
Be sure that your project and android-library / com.android.library have the same minSdkVersion.