I just downloaded and installed the latest version of android studio (v 1.4). After creating a new project, I see this error about the gradle refresh failure:
Error: Could not create an instance of Tooling API implementation using the specified Gradle installation '/Applications/Android Studio.app/Contents/gradle/gradle-2.4'.
I've tried so many different things that I have found online and no fix. When I open the layout window of the project it says "Gradle project sync failed..."
I am not sure what the error means at all and also do not know how to use any other different version of it.
I had this problem, fix is don't use gradle 2.4 I deleted gradle/gradle 2.4 folder and in gradle/wrapper/ gradle-wrapper-properties in build directory change 'distributionUrl' to another gradle distribution.
Deleting everything in /Library/Java/Extensions/ fixed this for me.
Issue with more info: https://issues.gradle.org/browse/GRADLE-1451
Add lines at the end of eclipse.ini
--illegal-access=warn
--add-opens=java.base/java.lang=ALL-UNNAMED
--add-opens=java.base/java.io=ALL-UNNAMED
--add-opens=java.base/java.util=ALL-UNNAMED
source
Edited title to reflect dicussion.
I have an Android Studio project from a friend that seems to compile and run with very weird behavior (i.e crashes, code being cut or simplified in odd ways). I noticed he is also using an out-dated version of Gradle. This being said, I created my own project and ported the code over and it worked just fine. I'm assuming this is a Gradle issue since it controls how the code is optimized. How do I update Gradle in an existing project?
What I've done:
Changed build.gradle and modified the classpath com.android.tools.build:grade:x.x.x to the same version in my new project. No avail.
Changed the gradle-wrapper.properties distributionUrl to an updated version.
Changed File -> Project Structure -> Project -> Gradle Version and Android Plugin Version to the new project version.
None of these fixed the weird behavior. If I'm wrong about the Gradle version being the problem here, please let me know.
Regards!
Try to clean/rebuild the project. You are probably using a newer version o android studio, i highly recommend downloading an old one to mantain old projects.
Theres a lot of changes on every new Android Studio, folders where files must be placed, gradle configs, and there is no way to "update project structure". You can manually update gradle version, but this will not update your config (build.gradle, settings.gradle) and neither your file folders.
Probably the errors you said are caused by the way gradle build files, its trying to build an old structure following a new structure rule.
I've just tried to use Android Studio. I've created blank project and tried to create Activity which extends AppCompatActivity. Unfortunalty Android Studio "says" that it
Cannot resolve symbol 'AppCompatActivity'
I have compile "com.android.support:appcompat-v7:22.0.+" in dependency list of my "app" module and rebuilt project several times. However I can only use ActionBarActivity. What am I doing wrong?
A little addition to other answers here, for anyone having the same error while using the right lib version and the right class.
When I upgraded to
appcompat-v7:22.1.0
In which ActionBarActivity is deprecated and empty and AppCompatActivty is the way to go, due to some glitch in Android Studio, It didn't quite pick up on version change.
i.e. Even though Gradle ran without errors, the IDE itself kept saying
Cannot resolve symbol 'AppCompatActivity' (and it also wasn't available through the Ctrl+N search)
I looked into the .idea/libraries folder and noticed there's no appropriate metafile for the new version of the lib.
So, using the old-reliable File->Invalidate Caches/Restart did the trick. Always try this when you feel something is magically wrong with Android Studio.
And then Disable offline mode and sync.
If the soft methods via gradle file / "Invalidate caches" and the other IDE tools do not work, use the hard way:
Exit Android Studio
Navigate in your project to the .idea folder
Just Rename the libraries folder
Restart Android Studio. It should now recreate the libraries folder and work again.
This worked for me on
Android Studio 3.1.2
Build #AI-173.4720617, built on April 13, 2018
JRE: 1.8.0_152-release-1024-b01 amd64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Linux 4.13.0-38-generic
Shahbaz Ali confirmed, it works also on
Android Studio 3.1.3
Build #AI-173.4819257, built on June 4, 2018
JRE: 1.8.0_152-release-1024-b01 amd64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Linux 4.13.0-38-generic
moujib confirmed, it works on Android Studio 3.2.1
Today (22 April) you can use the new AppCompatActivity released with the support libraries v 22.1.0.
Just change your dependency :
compile "com.android.support:appcompat-v7:22.1.0"
Here you can find more info about this new class.
It is too simple.here are the steps you need to follow
1-Exit Android studio.
2-Go to your project directory.
3-Something like this in my case( F>Android->YourProjectName->.idea).
4)-delete libraries folder present in .idea folder.
5)-restart your android studio.
and your issue is resolved.
I got it fixed by Going to build.gradle file and in dependencies the appcompat one, something like compile 'com.android.support:appcompat-v7:XX.X.X'
Changed it to compile 'com.android.support:appcompat-v7:XX.X.+'
Then click on Sync. All the red squiggly lines should go if everything else in your code is correct.
Check for typos too, i wasted my whole day looking for solutions when i had actually typed AppCompactActivity instead of AppCompatActivity
Cannot resolve symbol AppCompatActivity Issue.
Do the Simple Step to resolve the problem.
i) Exit the Android studio.
ii) Go to your project directory.
iii) Find the .idea folder in your project directory.
iv) Delete .idea folder.
v) Restart your android studio.
vi) The Issue Will be resolved.
I got the Cannot resolve symbol error for AppCompatActivity and many other classes & methods after updating Android Studio from 2.2.3 to 2.3, updating Android Gradle plugin to 2.3.0, and updating Gradle to 3.3.
File -> Invalidate Caches / Restart did not resolve the issue.
Preferences -> Build, Execution, Deployment -> Gradle showed Use local gradle distribution selected with Gradle home: /Applications/Android Studio.app/Contents/gradle/gradle-2.14.1 and a warning displayed saying the gradle location was incorrect.
Resolved issue by selecting Use default gradle wrapper (recommended).
Probably just pointing to the new local distribution location would also work.
When you add AndroidX support in Gradle.properties file e.g.
android.useAndroidX=true
android.enableJetifier=true
If you are using Gradle version greater than 3.2, the conventional Appcompat dependancy e.g.
implementation 'com.android.support:appcompat-v7:27.1.1
wont work.
Replace this dependancy with:
implementation 'androidx.appcompat:appcompat:1.1.0'
Moreover, change the AppCompatActivity import in your class file from this:
import android.support.v7.app.AppCompatActivity;
to this:
import androidx.appcompat.app.AppCompatActivity;
Done
Try this. In Android Studio, after putting the dependency in build.gradle.
Go to Build --> Clean Project.
It worked for me.
Thats really insane, i tried everything, synced with Gradle files, invalidated and restarted android studio. Still the problem persisted. Last resort was deleting .idea/libraries folder and it worked as charm.
You can use new AppCompatActivity appcompat-v7:22.1.+
Just add this to your gradle:
compile 'com.android.support:appcompat-v7:22.1.1'
For me the issue resolved when i updated the appcompact v7 to latest..
compile 'com.android.support:appcompat-v7:25.3.0'
Hope it helps...:)
So my collegue pushed their local.properties which broke everything. I copied my sdk path from another app and did:
File -> Sync Project with Gradle Files
I was getting this same problem with Android SDK 23, while developing on a Mac OS X Yosemite Machine. It turned out that I did not have Java SDK 7.
Once I installed Java SDK 7 and pointed the SDK from with the Android Studio to the new SDK, everything worked for me.
Here are the steps that I followed:
1) Shutdown Android SDK
2) Install Java SDK for Mac OS X from http://www.oracle.com/technetwork/java/javase/downloads/index.html
3) Start the Android SDK and point the SDK for this project to the new 1.7 Java SDK by going to File -> Project Structure -> JDK Location
4) Restart Android Studio
Hope this help
none of below solved my issue
Restart Android
File >> Synch Project with Gradle Files
Build >> Clean Project
Build >> Rebuild Project
File >> Invalidate Caches / Restart
Instead, I solved it by updating the version of appcompat & design dependencies to the recent version
To do so: go to build.grade (Module:app) >> dependencies section and then hit ALT + ENTER on both appcompat & design dependencies then select the shown version in my case it's 24.2.1 as shown in the picture
Remember to press Alt+Enter or add the import.
import android.support.v7.app.AppCompatActivity;
I updated my Gradle 2.3.3 to 4.4 and got an error on AppCompatActivity and also Cardview. I tried with clean project and rebuild project. It won't work, then I go to Project Folder -> .idea -> create backup of libraries folder and remove it -> then Rebuild Project that solved my issue.
Lets get going step by step: first clean project by using
Build->Clean
if this doesn't helps then use your second step
File>Invalidate Caches/Restart...
But the real problem begins when all the above options doesn't works so use your ultimate solution is to close project and go to project location directory and delete
.idea
You can open your project now again.
After upgrading to the latest support library, I had to upgrade to the latest Android studio (beta) version and gradle version before the IDE recognized AppCompatActivity again (invalidating caches and restart did not do the trick)
Add this dependency in project build .gradle.
Follow the example below.
dependencies {
compile 'com.android.support:appcompat-v7:22.1.0'
}
Easist Way
Open app level build.gradle and remove appcompact-v7 dependency & Sync.
Add dependency again & Sync.
Error gone!
Before
After
I solved it adding:
import androidx.appcompat.app.AppCompatActivity;
in the "import" zone of the main .java file. It worked for me.
Hope it helps!
You Have to just Do some change in your Gradle App File by adding some dependency
compile "com.android.support:appcompat-v7:XX:YY:ZZ"
while XX:YY:ZZ is the version code that you are using in your gradle file, otherwise if you set this version lower or higher than that you are using , then your app will face some problems like it will crash sometimes
i just update my android studio from 2.3.2 to 3.1.2 version. and this error occurs.
i clean project, rebuild project, invalidate cache/restart but nothing works.
i resolve this error by updating appcompat library from
compile 'com.android.support:appcompat-v7:23.4.0'
to
compile 'com.android.support:appcompat-v7:25.1.1'
in app build.gradle file.
If Invalidating caches not helps, just close the project then re-open it. Steps:
File > Close Project
Remove the project out of the starting project list
Close Android Studio
Open Android Studio
Open existed Project with this project
This happens because of one the following reasons:
You do not have the SDK API installed (this was my problem)
Your project/Android Studio doesn’t know where the needed files are
Your project references an outdated compile version that does not support AppCompatActivity
There is a typo
Possible solutions:
Check your .gradle file to make sure you’re not referencing an outdated version. AppCompatActivity was added in version 25.1.0 and belongs to Maven artifact com.android.support:appcompat-v7:28.0.0-alpha1, so do not use any version earlier than this. In your build.gradle (Module: app) file you should have the dependency listed:
dependencies {
compile 'com.android.support:appcompat-v7:25.1.0'
}
You may be using a different version, but just make sure you have listed the
dependency.
Open the SDK manager and download every API 7 or newer. If you were missing the needed API it will fix that issue, and downloading all the newer API’s can save you some hassle later on as well.
Check for typos in your import statement. Make sure it doesn’t say “AppCompactActivity” instead of “AppCompatActivity”.
Resync your project (File >Sync project with Gradle files)
Rebuild your project (Build >rebuild)
Clean your project (Build >clean project)
Close and restart Android Studio
Update Android Studio
Regenerate your libraries folder – In Android Studio, view your files in project view. Find the folder YourProjectName >.idea >libraries. Rename the folder to “libraries_delete_me”. Close and reopen Android Studio. Open your project again and the libraries folder should be regenerated with all of the files; you can now delete the “libraries_delete_me” folder.
For me, the issue resolved when I updated the Gradle build version. Don't know why?
I'll tell you how did i solved this problem in eclipse.
Download zip file from this link.https://github.com/dandar3/android-support-v7-appcompat then extract this file,open project, in lib folder you will see one jar file named "android-support-v7-appcompat" , add this jar file into your project. Thats it.
This can might be in the version difference in the app level gradle check it once and then re-build