Question

这是代码......

的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
}

的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

我的所有问题都与文件“DaggerSampleComponent”有关，除非我删除界面中的所有注入，否则根本不会创建该文件。

Java版本：1.8

相同的代码似乎在我的办公室Mac上工作，但不在我的Windows中。为此付出了很多努力。有人可以帮帮我!!!

提前致谢。

Answer 1

当您的Dagger 2设置出现问题时，当您尝试构建时，您将在Gradle控制台中收到编译时消息（它位于Android Studio的右下角）。该消息将告诉您出了什么问题，并为您提供解决方法的线索。

在您的情况下，您的LoginActivity：

中似乎有这样的内容

@Inject FileOrganiserModule fileOrganiserModule;

protected void onCreate(Bundle savedInstanceState) {

Dagger 2模块和组件就像脚手架一样，可以帮助您为项目中的依赖项请求注入。您通常不应通过在其上添加@Inject注释来请求注入它们。

如果必须使用当前Activity的引用创建模块，通常只需使用构造函数创建模块的实例：

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

或者您可以使用新的dagger.android类为您执行此操作。您可以在Google Android架构蓝图回购here

中找到一个很好的示例项目

未创建Dagger2组件

1 个答案: