Dagger2 is not generating Dagger* classes

问题:

As the title says, Dagger2 is not generating the Dagger* prefixed classes for my Android project. I looked at all other similar posts I could find but nothing helps. I'm trying to add it to an existing project, and I had some initial problems getting it to play nicely with data binding, but I seem to have sorted that out i.e. no compile errors on the data binding, and it generates code for it. I have also downloaded several example projects which work fine.

My top level graddle file has

    classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8' 

while my build level has

apply plugin: 'com.neenbedankt.android-apt'  .... final DAGGER_VERSION = '2.8' ....      compile 'javax.inject:javax.inject:1'     compile 'javax.annotation:javax.annotation-api:1.2'      apt "com.google.dagger:dagger:$DAGGER_VERSION"     compile "com.google.dagger:dagger:$DAGGER_VERSION" } 

The component file is extremely simple

@Singleton @Component(modules = {         AndroidModule.class })  public interface ApplicationComponent {     void inject(MainActivity activity); } 

The AndroidModule file contains

@Module public class AndroidModule {     private final Context application;      public AndroidModule(Application application) {         this.application = application;     } } 

and the Application class has

import com.rockwellcollins.fsl.dagger.DaggerApplicationComponent; ...  public class FslApplication extends Application {      private static ApplicationComponent component;      @Override     public void onCreate() {         super.onCreate();          component = DaggerApplicationComponent.builder()                 .androidModule(new AndroidModule(this))                 .build();     }      public static void inject(MainActivity target) {         component.inject(target);     }      public ApplicationComponent getComponent() {         return component;     } } 

and the output I get is

Information:Gradle tasks [clean, :android-sliding-layer-lib:Library:generateDebugSources, :android-sliding-layer-lib:Library:mockableAndroidJar, :android-sliding-layer-lib:Library:prepareDebugUnitTestDependencies, :android-sliding-layer-lib:Library:generateDebugAndroidTestSources, :android-sliding-layer-lib:Library:compileDebugSources, :android-sliding-layer-lib:Library:compileDebugUnitTestSources, :android-sliding-layer-lib:Library:compileDebugAndroidTestSources, :mobile:generateDebugSources, :mobile:mockableAndroidJar, :mobile:prepareDebugUnitTestDependencies, :mobile:generateDebugAndroidTestSources, :mobile:compileDebugSources, :mobile:compileDebugUnitTestSources, :mobile:compileDebugAndroidTestSources, :wear:generateDebugSources, :wear:generateDebugAndroidTestSources, :wear:mockableAndroidJar, :wear:prepareDebugUnitTestDependencies, :wear:compileDebugSources, :wear:compileDebugAndroidTestSources, :wear:compileDebugUnitTestSources]  Warning:WARNING: Dependency org.json:json:20131018 is ignored for debug as     it may be conflicting with the internal version provided by Android. Warning:WARNING: Dependency org.json:json:20131018 is ignored for release as it may be conflicting with the internal version provided by Android. Warning:View field aircraftList collides with a variable or import Warning:View field groundList collides with a variable or import  C:\Git\android\mobile\src\main\java\com\rockwellcollins\fsl\FslApplication.java Error:(7, 38) error: cannot find symbol class DaggerApplicationComponent Error:org.gradle.api.internal.tasks.compile.CompilationFailedException:  Compilation failed; see the compiler error output for details. Information:BUILD FAILED 

And as I said, no code gets generated at all for the Dagger stuff. If anyone can point out what the problem is, I would be very grateful.

回答1:

Your apt dependency should be

apt "com.google.dagger:dagger-compiler:$DAGGER_VERSION" 

You're missing the -compiler part of the artifact id.

This link also has some useful information. https://github.com/google/dagger#android-gradle

回答2:

I was facing the same problem and spent a lot of time over stack overflow. At last I go through this and able to find solution. Briefly, You have to make some changes in your module level Gradle file. Please remove

apply plugin: 'com.neenbedankt.android-apt'

at the top of the file. And replace

apt 'com.google.dagger:dagger-compiler:2.11' 

with

annotationProcessor 'com.google.dagger:dagger-compiler:2.11' 

After that rebuild your project and you will be able to import your Dagger prefix classes. Hopw it will help you out.

文章来源: Dagger2 is not generating Dagger* classes