Dagger 2 and android Studio: working but can't

问题:

I'm trying to use Dagger 2 in an Android Studio Project. I've used the CoffeeMaker example. I've managed to make the app build and working however: - I don't success in seeing the generated code. - If I debug, I can't see it neither. - Moreover DaggerCoffeeApp_Coffee as marked as reed (Cannot resolve symbol)

My gradle files are:

// 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:1.1.3'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

and

apply plugin: 'com.android.application'


android {
    compileSdkVersion 22
    buildToolsVersion "21.1.2"

    defaultConfig {
        applicationId "com.mateuyabar.android.dagger2test"
        minSdkVersion 22
        targetSdkVersion 22
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    lintOptions {
        abortOnError false // ignoring some references from dagger-compiler
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:22.0.0'
    compile 'javax.inject:javax.inject:1'
    compile 'javax.annotation:javax.annotation-api:1.2'
    compile 'com.google.dagger:dagger:2.0'
    provided 'com.google.dagger:dagger-compiler:2.0'
    provided 'org.glassfish:javax.annotation:10.0-b28'

}

Thanks

回答1:

Use the Android-Apt plugin by Hugo Visser:

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

buildscript {
  repositories {
    mavenCentral()
  }

  dependencies {
    // the latest version of the android-apt plugin
    classpath 'com.neenbedankt.gradle.plugins:android-apt:1.4'
  }
}

android {
    compileSdkVersion 22
    buildToolsVersion "21.1.2"

    defaultConfig {
        applicationId "com.mateuyabar.android.dagger2test"
        minSdkVersion 22
        targetSdkVersion 22
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    lintOptions {
        abortOnError false // ignoring some references from dagger-compiler
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:22.0.0'
    compile 'javax.inject:javax.inject:1'
    compile 'javax.annotation:javax.annotation-api:1.2'
    compile 'com.google.dagger:dagger:2.0'
    apt 'com.google.dagger:dagger-compiler:2.0'
    provided 'org.glassfish:javax.annotation:10.0-b28'
}

Note the apt 'com.google.dagger:dagger-compiler:2.0' line as well. This should make the generated sources visible for AS.

回答2:

I stumbled upon same problem, in my case I was testing new classes and tried to inject them separately into my main class, in that case Dagger won't generate any DaggerComponents from factory.

Simply, remember to put all injections that goes into one class in one Module & one Component. You cannot inject more than one DaggerComponent into one class. Besides that's the point of those components, to aggregate injected classes