切换到Android Studio 2.0后使用Dagger 2时出现NoClassDefFoundError

在升级到 Android Studio 2.0 之前，我可以毫无问题地使用 Dagger 2。现在我得到了NoClassDefFoundError这让我停顿了一天多，我正在寻求帮助。

看来 Gradle 不能我的AppModule类，尽管很明显它在我的项目中。我什至包括了一套multiDexEnabled true即使我的项目只有几个文件。

我在网上找到的所有内容都表明您可以单击要导入的库。 Android Studio 就没有这样的奢侈了。

任何帮助将不胜感激，我将永远忠诚于您。

04-21 17:26:54.006 7875-7875/com.androidtitan.spotscoreapp E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.androidtitan.spotscoreapp, PID: 7875
java.lang.NoClassDefFoundError: com.androidtitan.spotscoreapp.main.injection.AppModule_ProvidesApplicationFactory
at com.androidtitan.spotscoreapp.main.injection.DaggerAppComponent.initialize(DaggerAppComponent.java:31)
at com.androidtitan.spotscoreapp.main.injection.DaggerAppComponent.<init>(DaggerAppComponent.java:23)
at com.androidtitan.spotscoreapp.main.injection.DaggerAppComponent.<init>(DaggerAppComponent.java:0)
at com.androidtitan.spotscoreapp.main.injection.DaggerAppComponent$Builder.build(DaggerAppComponent.java:66)
at com.androidtitan.spotscoreapp.App.onCreate(App.java:28)
at com.android.tools.fd.runtime.BootstrapApplication.onCreate(BootstrapApplication.java:326)
at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1020)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5010)
at android.app.ActivityThread.access$1600(ActivityThread.java:172)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1482)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5835)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)


package com.androidtitan.spotscoreapp.main.injection;

import android.app.Application;
import android.content.Context;

import javax.inject.Singleton;

import dagger.Module;
import dagger.Provides;

应用程序模块

@Module
public class AppModule {
private static Application application;

public AppModule(Application application) {
    this.application = application;
}

@Provides @Singleton
Application providesApplication() {
    return application;
}

@Provides @Singleton
Context providesApplicationContext() {
    return application.getBaseContext();
}
}

应用组件

package com.androidtitan.spotscoreapp.main.injection;

import android.app.Application;
import android.content.Context;

import com.androidtitan.spotscoreapp.main.ui.activity.LoginActivity;
import com.androidtitan.spotscoreapp.main.ui.fragment.LoginFragment;
import com.androidtitan.spotscoreapp.main.ui.fragment.SignUpFragment;

import javax.inject.Singleton;

import dagger.Component;

@Singleton
@Component(
    modules = { AppModule.class,
                LoginPresenterModule.class }
)
public interface AppComponent {
Application getApplication();
Context getApplicationContext();

void inject(LoginFragment activity);
}

应用程序扩展应用程序

import android.app.Application;
import android.support.multidex.MultiDexApplication;

import com.androidtitan.spotscoreapp.main.injection.AppComponent;
import com.androidtitan.spotscoreapp.main.injection.AppModule;
import com.androidtitan.spotscoreapp.main.injection.DaggerAppComponent;
import com.firebase.client.Firebase;

import timber.log.Timber;

public class App extends Application {

private static AppComponent appComponent;

@Override
public void onCreate() {
    super.onCreate();

    Firebase.setAndroidContext(this);

    appComponent = DaggerAppComponent.builder()
            .appModule(new AppModule(this))
            .build();

    if (BuildConfig.DEBUG) {
        Timber.plant(new Timber.DebugTree());
    }

}

public static AppComponent getAppComponent(){
    return appComponent;
}
}

build.gradle（模块：应用程序）

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

android {
compileSdkVersion 23
buildToolsVersion "24.0.0 rc1"

defaultConfig {
    applicationId "com.androidtitan.spotscoreapp"
    minSdkVersion 16
    targetSdkVersion 23
    versionCode 1
    versionName "1.0"
    multiDexEnabled true


}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}

packagingOptions {
    exclude 'META-INF/DEPENDENCIES.txt'
    exclude 'META-INF/NOTICE'
    exclude 'META-INF/NOTICE.txt'
    exclude 'META-INF/LICENSE'
    exclude 'META-INF/LICENSE.txt'
}
}

dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
testCompile 'junit:junit:4.12'
apt 'com.google.dagger:dagger-compiler:2.0'
compile 'com.android.support:multidex:1.0.0'

provided 'com.google.dagger:dagger-compiler:2.0'
provided 'org.glassfish:javax.annotation:10.0-b28'
compile 'com.android.support:appcompat-v7:23.3.0'
compile 'com.jakewharton.timber:timber:4.1.2'
compile 'com.android.support:design:23.3.0'
compile 'com.jakewharton:butterknife:7.0.1'
compile 'com.firebase:firebase-client-android:2.3.1'
}

build.gradle（项目：spotscoreapp）

buildscript {
repositories {
    jcenter()
}
dependencies {
    classpath 'com.android.tools.build:gradle:2.0.0'
    classpath 'com.neenbedankt.gradle.plugins:android-apt:1.4'

    // 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
}

Android清单

`

<uses-permission android:name="android.permission.INTERNET" />

<application
    android:name=".App"
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme" >
    <activity
        android:name=".main.ui.activity.LoginActivity"
        android:label="@string/title_activity_login"
        android:theme="@style/AppTheme.NoActionBar" />
    <activity android:name=".main.ui.activity.MainActivity" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

`

我遇到了一个非常类似的问题，并通过在 Android Studio 中执行非常常见的操作来解决它。你基本上需要

Invalidate Caches and then Clean Project

你知道，Dagger2 在编译时生成大量代码，有时事情可能会变得混乱，特别是当你使用 Android Studio 2.0 提供的 Instant Run 时