Dagger2 component is not created

Question

Here is the code....

build.gradle

    // Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.1'
        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.1'
        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

MainActivity

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

import javax.inject.Inject;

public class MainActivity extends AppCompatActivity {

    @Inject
    SampleModule sampleModule;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ((SampleApp)getApplication()).getSampleComponent().inject(this);
        sampleModule.simpleModel.setX(10);
    }
}

SampleApp

import android.app.Application;

/**
 * Created by pavan on 4/17/2017.
 */

public class SampleApp extends Application {
    private SampleComponent sampleComponent;

    @Override
    public void onCreate() {
        super.onCreate();
        sampleComponent = DaggerSampleComponent.builder()
                .sampleModule(new SampleModule(this))
                .build();
    }

    public SampleComponent getSampleComponent(){
        return  sampleComponent;
    }
}

SampleComponent

import javax.inject.Singleton;

import dagger.Component;

/**
 * Created by pavan on 4/17/2017.
 */
@Singleton
@Component(modules = {SampleModule.class})
public interface SampleComponent {
    void inject(MainActivity activity);
}

SampleModule

import javax.inject.Singleton;

import dagger.Module;
import dagger.Provides;

/**
 * Created by pavan on 4/17/2017.
 */
@Module
public class SampleModule {
    SimpleModel simpleModel;
    SampleApp sampleApp;

    public SampleModule(SampleApp sampleApp){
        this.sampleApp = sampleApp;
    }

    @Provides
    @Singleton
    public SampleApp provideApplication(){
        return sampleApp;
    }

    @Provides
    @Singleton
    public SimpleModel provideSimpleModelObj() {
        return new SimpleModel();
    }

}

SimpleModel

public class SimpleModel {
    private int x;
    private int y;

    public int getX() {
        return x;
    }
public void setX(int x) {
    this.x = x;
}

public int getY() {
    return y;
}

public void setY(int y) {
    this.y = y;
}

}

Gradle Log

Error:(13, 10) error: com.uvr.organizer.myfilesorganizer.FileOrganizerModule cannot be provided without an @Inject constructor or from an @Provides- or @Produces-annotated method.
com.uvr.organizer.myfilesorganizer.FileOrganizerModule is injected at
com.uvr.organizer.myfilesorganizer.LoginActivity.appScope
com.uvr.organizer.myfilesorganizer.LoginActivity is injected at
com.uvr.organizer.myfilesorganizer.AppComponent.inject(loginActivity)
Error:(14, 10) error: com.uvr.organizer.myfilesorganizer.FileOrganizerModule cannot be provided without an @Inject constructor or from an @Provides- or @Produces-annotated method.
com.uvr.organizer.myfilesorganizer.FileOrganizerModule is injected at
com.uvr.organizer.myfilesorganizer.MainActivity.appScope
com.uvr.organizer.myfilesorganizer.MainActivity is injected at
com.uvr.organizer.myfilesorganizer.AppComponent.inject(mainActivity)
Error:Execution failed for task ':app:compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.
Information:BUILD FAILED
Information:Total time: 8.136 secs
Information:3 errors
Information:0 warnings
Information:See complete output in console

All my problem is about the file "DaggerSampleComponent" which is not at all getting created unless i delete all inject in interface.

Java version : 1.8

The same code seems working on my office Mac but not in my Windows. struggling a lot for this. Can someone help me!!!

Thanks in advance.

Do a clean/rebuild and then post the compiler message you are getting — David Rawson, Apr 21 '17 at 03:24
I tried all solutions available in Stackoverflow. But no use :( — Pavandroid, Apr 21 '17 at 03:55
Ok but if you [edit] your question to include the gradle console error message and also your app module build.gradle we might be able to help you — David Rawson, Apr 21 '17 at 04:56
Do you have the dagger compiler running with the annotation processor? — Fred, Apr 21 '17 at 09:07
Added gradle log and build.gradle is already there the first two are gradle files. — Pavandroid, Apr 22 '17 at 07:09
@Fred Can you let me know how can i check if dagger compiler running? — Pavandroid, Apr 22 '17 at 07:10
The code you have posted does not directly relate to the error message. Have you got a @Inject FileOrganizerModuld fileOrganizerModule; inside your LoginActivity? — David Rawson, Apr 22 '17 at 11:59
We shouldn't inject module at a time rather we can inject objects with in module. Can some one respond with a answer so that i can accept it as a solution :) — Pavandroid, Apr 23 '17 at 12:44

score 1 · Accepted Answer · answered Apr 22 '17 at 21:40

When something goes wrong with your Dagger 2 setup, you will get a compile-time message in the Gradle console when you try and build (it's in the bottom right corner of Android Studio). The message will tell you what is wrong and give you a clue for how to fix it.

In your case, it looks like you have something like this inside your LoginActivity:

@Inject FileOrganiserModule fileOrganiserModule;

protected void onCreate(Bundle savedInstanceState) {

Dagger 2 modules and components are like scaffolding that helps you to request injection for the dependencies in your project. You normally shouldn't request injection of them by putting @Inject annotations on them.

If you have to create your module with a reference of the current Activity, you normally just create an instance of the module using the constructor:

void injectMembers() {
    DaggerLoginComponent.builder().loginModule(new LoginModule(this));
}

Or you can use the new dagger.android classes to do that for you. A good example project for you to follow is in the Google Android Architecture Blueprints repo here

Dagger2 component is not created

1 Answers1