问题
I'm trying to use java 8 in my project and for that I added the jack compiler.
After enabling jack I started having problems with libraries that use Annotation Processing and looking in the web I read that I need android studio 2.2 and com.android.tools.build:gradle:2.2.0-alpha6 to compile libraries that generate code from annotations.
I download Android Studio 2.2 preview 6 and converted my project to it. And after that I discovered that the apt gradle plugin is not supported anymore and then I needed to change every dependency that use apt to the use the new annotationProcessor option.
Ex:
apt "org.projectlombok:lombok:$rootProject.lombokVersion"
to
annotationProcessor "org.projectlombok:lombok:$rootProject.lombokVersion"
Now if I use "make project" the project is compiled without problems, but if I try to execute it I have errors with the code that should be generated by the annotations.
Also when I open the project I receive a warning from the lombok plugin "Annotation processing seems to be disabled for the project". When I open the project settings and go to "Build -> Compiler" I can't find Annotation Processors.
So, my question is: How can I enable Annotation Processors in Android Studio 2.2? This feature was disabled? If yes, how can I generate the code from annotations?
--EDIT-- I'm making a PullRequest to change the project to compile with Java8, you can check the PR here: https://github.com/jonathanrz/myexpenses-android/pull/57
回答1:
Close the project. In the "Welcome to Android Studio" dialog click "Configure" in the bottom right corner.
Then,
Settings > Build, Execution, Deployment > Compiler > Annotation Processors. Tick 'Enable annotation processing'.
If that does not work. Delete the project from "Welcome to Android Studio" dialog and open from new.
Worked for me.
回答2:
- Close all your AndroidStudio Project
See
Click Configure-->Setting See
回答3:
You can enable Annotation Processors without closing your project in Android Studio 2.3:
File -> Other Settings -> Default Settings
Build, Execution, Deployment -> Compiler -> Annotation Processors ->
Enable annotation processing.
Don't forget to clean, build, invalidate and restart after that.
Cheers!
回答4:
https://stackoverflow.com/a/38698186/4024146
and after do: File > Invalidate Caches / Restart... > Invalidate and Restart
回答5:
Open compiler.xml in the .idea folder. I had the following:
<annotationProcessing>
<profile default="true" name="Default" enabled="false">
<processorPath useClasspath="true" />
</profile>
</annotationProcessing>
I simply changed enable to true and re-opened project.
回答6:
- Close your project.
- Settings > Build, Execution, Deployment > Compiler > Annotation Processors. Check 'Enable annotation processing'.
- Open your project.
- File > Invalidate Caches / Restart... > Invalidate and Restart
Wait for the process completely, then everything will be fine.
回答7:
Adding to @Jacques Koorts and @mtrakal
If you can't get to the "Welcome to Android Studio" screen. Try File -> Close Project instead of clicking the X icon. Then you'll get the "Welcome to Android Studio" screen and you'll see the gear in the bottom right. Follow the accepted answer after that and possibly the cache invalidation.
回答8:
Stuped but worked for me, try to change the library version in my case I upgraded to 1.4.1
回答9:
Sometimes the annotate option will be grayed out if the project is not integrated into version control. So goto VCS->Enable version control integration then voila you will see the annotate option and can see the author name beside the line numbers on the editor.
回答10:
This Answer for those who face this problem in the future
For Kotlin
Add kapt plugin
apply plugin: 'kotlin-kapt'
implementation 'com.google.dagger:dagger:2.21'
kapt 'com.google.dagger:dagger-compiler:2.21'
For Java
implementation 'com.google.dagger:dagger:2.21'
annotationProcessor 'com.google.dagger:dagger-compiler:2.21'
来源：https://stackoverflow.com/questions/38642712/enable-annotation-processors-option-in-android-studio-2-2