切换到 Android Studio 2.0 后使用 Dagger 2 时出现 NoClassDefFoundError [英] NoClassDefFoundError When Using Dagger 2 After Switching to Android Studio 2.0

问题描述

在升级到 Android Studio 2.0 之前，我可以使用 Dagger 2 没问题.现在我收到一个 NoClassDefFoundError 这让我关闭了一天多，我正在寻求帮助.

Before upgrading to Android Studio 2.0 I could use Dagger 2 no problem. Now I am getting a NoClassDefFoundError This has shut me down for more than a day and I'm reaching out for some help.

似乎 Gradle 无法使用我的 AppModule 类，尽管很明显它在我的项目中.我什至包括 set multiDexEnabled true 即使我的项目只有几个文件.

It seems as though Gradle cannot my AppModule class even though it is pretty clear that it is in my project. I have even included set multiDexEnabled true even though my project is only a few files.

我可以在网上找到的所有内容都说您可以单击要导入的库.Android Studio 没有这样的奢侈.

Everything I can find online says that you can click your libraries to be imported. Android Studio has no such luxury.

我们将不胜感激，您将拥有我不朽的忠诚.

Any help would be greatly appreciated and you will have my undying loyalty.

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);
}

应用扩展应用

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(Module:App)

build.gradle(Module:App)

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)

build.gradle(Project: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
}

AndroidManifest

AndroidManifest

`

<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>

`

推荐答案

我遇到了一个非常相似的问题，并通过在 Android Studio 中做一些非常常见的事情来解决它.你基本上需要

I had a very similar issue and resolved it by doing pretty usual things in Android Studio. You basically need to

使缓存无效，然后清理项目

您知道，Dagger2 会在编译时生成大量代码，有时会出现问题，尤其是当您使用 Android Studio 2.0 提供的 Instant Run 时

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这篇关于切换到 Android Studio 2.0 后使用 Dagger 2 时出现 NoClassDefFoundError的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！