Gradle sync failed with reason unknown - Android studio 4.2.1 [closed] - android

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Did something to trigger a gradle sync (e.g. added a module that has its own compileSdkVersion different from my project's, as seen in its own build.gradle file), but after seeing Gradle sync started in the Event Log, I quickly run into:
Gradle sync failed: Sync failed: reason unknown
Tried solutions
Invalidate cache and restart
reinstalled android studio and recloned project
changed the gradle version
removed .gradle and .idea folder
run gradle build from cli
toggling offline mode
Manually pointed gradle files
[using Android studio 4.2.1 and gradle 6.5, but can encounter this problem with other IDE/gradle combinations, as the problem most likely stems from the dependencies I've changed.]

In your screenshot, there is a infomation bar on top of the editor area "Gradle project sync failed. Basic funtionality will not work." Click the "Show log in finder", you can check the real reason in the log file.
In my case, I found “ Module: 'xxxxx' platform 'android-26' not found” which mean the platform 26 is missing. After download the platform api level 26, problem solved.

There is great post here: https://www.tehrir.com/gradle-sync-failed in this matter.
Make sure your Android Gradle Plugin version matches Gradle version according to this page: https://developer.android.com/studio/releases/gradle-plugin#updating-gradle
If it matches and still gives same error try upgrading to a higher "tier":
4.2.1 and 6.7.1
It worked for me.

I got a similar issue in the new Arctic Fox version. After looking at the idea.log (it should be at /Users/username/Library/Logs/Google/AndroidStudioXX.XX/idea.log), it looked like I was missing some Android SDKs that are needed for the external libraries (I'm working on react native).
Just look for the lines that say Module: xx platform 'android-yy' not found.
Use the SDK Manager and install the SDK version yy
Invalidate cache and restart
In my case, I had multiple missing SDKs, so it didn't work after restarting; I had to repeat steps 1 to 3 another time.

When installing new environment, go to SDK Manager and install necessary API (ex: from 28 to 33)
Finally go to Gradle of App level and Sync Now again.

Did you install all the SDK packages required on Android Studio?
'Cause I solved installing some SDK packages I didn't install previously.
Check if you have missed them.
For understand when you have done, the Event Log tab reports these messages (look at the img) https://i.stack.imgur.com/ids61.png

I had this same issue and i fixed it in the following steps after trying lots of stuff all in vain.
Check the compileSdkVersion 30 and targetSdkVersion 30 values in your app gradle file.
If the values are say 30, you must make sure that when you click the SDK Manager at the top left corner of your Android studio, you will have this SDK level installed.
Otherwise you can install it. from the dialog box that will have popped up. In my case, my app gradle file from a pull request of my company's code was 30 but since i had just updated android studio i had level 31 only installed.
So instead of going through the hassle of installing SDK level 30 of which i was in a rush to do other stuff, I just switched my values from 30 to 31 in the gradle app files.
And everything worked after gradle sync. Then when i had the time, i would later go back to install level 30 and revert the values.
Hope this helps someone as I had spent some good minutes trying to figure out the error

Tried all the options mentioned above and finally deleted the .gradle folder within the project structure and invalidate caches to restart the intellij, this resolved the issue

If you have a fresh installation of android studio , you should
Install java if not already installed (If you re-installed windows) skip this step otherwise
Menu -> Invalidate caches/restart and try to sync Gradle afterwards (If issue still persists go to step 3)
go to tools->SDK Manager-> and install any missing SDK version (Sync Gradle afterwards) if all the android versions are installed prior to your targeted version and subsequent to your compiled SDK version go search another thread on Stack Overflow! else go to step 4
Accept debugging dialog/keys at your android device if you keep the device connected and are waiting to show up in run configuration (Wait few seconds to let the dialog show up. Go to step 5 if dialog not presented in step 4)
Disconnect the USB cable and reconnect again.
make sure to accept the SDK license in step 4.

Just go to "Run/edit configurations" and scroll down to bottom of the window and here you can see option "Before launch"
Remove whatever already inside the little window.
Then click on (+) icon and select "Gradle-aware Make" and then
type "assembleDebug" and select the first option or that you
need. This will solve your problem.

I also have exact errors and tried all solutions, but I solved this by adding Android Virtual Device.
In my case, I added two virtual devices with minimum API level and Maximum API level of my project. Then Restarting the Android Studio Sync Gradle and solved the problem.
Try this with Stable Network Connection.

I had a fresh installation of Android Studio and started facing this problem. After trying all the various solutions, I found that the SDK Platform was not installed for API Level 30, but was installed for API Level 31, and my project was using API Level 30.
So I installed API level 30 SDK Platform and the issue got resolved.

Related

cannot acces 'android.app.Activity' which is a supertype of

I have just installed android studio and i'm trying to create my first application. As soon as i create the project i get this error. Obviously i did not write any code and all the lines you see are the default code of the project.
I tried to sync but, as you see in the terminal below, a license error appears.
How can i fix this problem?
I have installed android studio correctly, installing SDK, tools and so on.
Thank you in advance.
Following the advice of Peppe L-G (the guy who commented my question) i went to sdk manager and in the section "SDK platforms" i installed "Android 10.0(Q)" (API level 29).
Now everything works correctly.
I think when your internet connection was off-line. Because Gradle couldn't reach the library, it thought that was missing.Please check that .when you connected to internet and reopen /reinstalling fix the issue
else check your gradle version android version etc to fix the issue
Option 1:
File -> Sync Project with Gradle Files
Option 2:
File -> Invalidate Cache & Restart

Android Studio select SDK error on trying to run project

I am using Android Studio 3.1 on Ubuntu 18.04 LTS. I'm currently working on a project with target API 28. I've downloaded the SDK with API level 28 during installation but sometimes when I try to run my project on my device, a popup dialogue prompts me to select the SDK. This does not happen every time but happens sometimes even if I've run the project before and made no change to the SDK path. I don't know what triggers this. I've seen similar questions on StackOverflow, but none of the solutions work for me. Here's what I have done so far:
Synced my project
Invalidated cache and restart
closed my project and opened it again
Uninstalled my SDK and downloaded it again
Switched back to an older version of SDK and then back again
But none of this works and the only workaround I found was to open another project that I downloaded from Github (with API 26), build it and then go back to my current project. This solves it temporarily. A few of my friends are working on the same project on different machines (Windows, Mac) and they have this problem, too.
Is this a bug with AS or is there a permanent solution?
File->Settings->Android SDk.
If already was there in your system set the path to that otherwise download the SDK from SDK tools by selecting specific name.
I've found this workaround. It is not perfect, but it works. Hope this this will be helpful for someone else.
Move your project folder to another location and then open it. It resolves the problem.

Android Studio Gradle not Building Project

I was using my android Studio very well. I don't know what happened and now I am getting only Building "xxxx" Gradle project info whenever I want to create my new project. I am unable to open any new project. Please help. I don't have even 10 reputations to upload the screenshot.
I think my Gradle is not working. How can I reset or restart my Gradle ?
I think you have updated your gradle build tool.
Go to file>setting>build,execution deployment> gradle> check your gradle tool version
I had many hours trying to figure this out.
I have followed just about every Stack-overflow article on the issue.
The cause for me was my Anti-virus and Firewall settings. I turned these off, and restarted my Android Studio opened my application I was trying to build it all downloaded what it needed and sync'd nicely. Problem solved, relief as I have been literally days on this.
Add this line
File -> Settings -> Compiler -> Gradle -> VM Options:
-Xmx256m
I was failing a class because of this issue. I solved it by
1) Do not delete the Android Studio Version You Downloaded, Leave it intact
2) Google search an older version of Android Studio, in my case, 2.1.1
3) Download it and install, CHOOSE CUSTOM INSTALL
4) A message should appear saying approximately "Another version of Android Studio has been discovered, the installer will only download the missing files"
5) Confirm by starting a new project
I faced the same problem. Had to wait for 30 minutes for the project to built. But then it was working properly again. So maybe waiting is a solution.

Eclipse plugin stopped working after update

I updated the Eclipse plugins (Help - Check for update). Since the restart after installation, the plugins aren't working any longer. They're still enlisted in "installation details", but there are no Android preferences, no Android menu entries, no editor ("Could not open the editor: No editor descriptor for id com.android.ide.eclipse.editors.manifest.ManifestEditor"), and so on. I tried to un- and reinstall the plugins with no success. I'm using Eclipse Helileo with Ubuntu. Any idea how I could get my Android IDE working again?
Did you also update the SDK tools? i.e clicking the little Android with the arrow icon and letting it check for updates then installing the updates.
the problem come from the compatibility of the plugin versions and the version of the jdk/sdk
if you have the last plugin , you must have the last version of jdk/sdk
try to download the last revision of sdk android , with the last jdk java
and lanch again the eclipse .
good luck my freind
I have had the same problem several times. Sadly, the only sure-fire solution I've found is to remove ~/.eclipse and reinstall the Android Eclipse plugin (http://developer.android.com/sdk/installing/installing-adt.html). There is talk that it's fixable just by modifying the bundles.info file (http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=587657) but I never managed to get it working that way.

Uninstalling Android ADT

This seems like a trivial task, but I can't find an option to cleanly de-install the ADT from my Eclipse installation.
Of course, I could just delete the folder of the SDK, but this just throws errors when starting up Eclipse the next time. The reason I'm asking is because my old ADT keeps throwing a wierd error (Failed to fetch URL https://dl-ssl.google.com/android/repository/addons_list.xml, reason: File not found) and I need a complete, fresh re-install.
Important:
under
Help -> about eclipse sdk -> installation details
the uninstall button for all android plugins is greyed out
The only way to remove the ADT plugin from Eclipse is to go to Help > About Eclipse/About ADT > Installation Details.
Select a plug-in you want to uninstall, then click Uninstall... button at the bottom.
If you cannot remove ADT from this location, then your best option is probably to start fresh with a clean Eclipse install.
I found a solution by myself after doing some research:
Go to Eclipse home folder.
Search for 'android' => In Windows 7 you can use search bar.
Delete all the file related to android, which is shown in the results.
Restart Eclipse.
Install the ADT plugin again and Restart plugin.
Now everything works fine.
I had the issue where after updating the SDK it would only update to version 20 and kept telling me that ANDROID 4.1 (API16) was available and only part of ANDROID 4.2 (API17) was available and there was no update to version 21.
After restarting several times and digging I found (was not obvious to me) going to the SDK Manager and going to FILE -> RELOAD solved the problem. Immediately the other uninstalled parts of API17 were there and I was able to update the SDK. Once updated to 4.2 then I could re-update to version 21 and voila.
Good luck!
David
If running on windows vista or later,
remember to run eclipse under a user with proper file permissions.
try to use the 'Run as Administrator' option.
i got the same problem after clicking update plugins,
i tried all the suggestions above and failed , the only thing that worked for my is reinstalling android studio..

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