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

似乎Gradle不能用我的AppModule类,即使它很清楚它在我的项目中.我甚至包括set 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没有这样的奢侈品.

任何帮助将不胜感激,你将获得我不懈的忠诚.

04-21 17:26:54.006 7875-7875/com.androidtitan.spotscoreapp E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.androidtitan.spotscoreapp,PID: 7875
@R_301_3865@.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 @R_301_3865@.reflect.Method.invoke(Native Method)
at @R_301_3865@.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;

的AppModule

@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();
}
}

AppComponent

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);
}

应用扩展了应用

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;
}
}

的build.gradle(模块：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'
}

的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
}

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>

`

我有一个非常类似的问题,并通过在Android Studio中做很常见的事情来解决它.你基本上需要

使缓存无效,然后清理项目

你知道,Dagger2在编译时会生成很多代码,有时会出现问题,特别是如果你使用Android Studio 2.0提供的Instant Run

为什么该类被提前标记为无效类呢？

 

（1）dexopt 类扫描 （Android 5.0之前版本特有的一类NoClassDefFoundError）

dexopt会扫描被该类A引用的所有的其他类是否存在，如果不存在，则其他类会被标记未无效类。

 

这种情况往往发生在使用multidex对main-dex分包后，由于没有找到类，会被标记为无效的类

 

 

（2）初始化时发生了异常

W/dalvikvm: Unable to resolve superclass of Lcom/tencent/bugly/beta/Beta; (68)
W/dalvikvm: Link of class ''Lcom/tencent/bugly/beta/Beta;'' failed
W/dalvikvm: VFY: unable to resolve static field 154 (autoCheckUpgrade) in Lcom/tencent/bugly/beta/Beta;
D/dalvikvm: VFY: replacing opcode 0x6a at 0x0002
W/dalvikvm: Unable to resolve superclass of Lcom/tencent/bugly/crashreport/CrashReport$UserStrategy; (66)
W/dalvikvm: Link of class ''Lcom/tencent/bugly/crashreport/CrashReport$UserStrategy;'' failed
D/dalvikvm: DexOpt: unable to opt direct call 0x0165 at 0x12 in Lcom/pitaya/buckettool/BucketApplication;.initBugly

好吧,我决定同时试用 Android的Volley网络库和新的Android Studio IDE.但是,我遇到了一些问题.

我构建了volley.jar,将其复制到我的libs文件夹中以获取新项目,编辑build.gradle以包含volley,并在我的主要活动中设置静态ImageLoader和RequestQueue.但是,当我将应用程序加载到模拟器(4.2)上时,我最终得到了

E/AndroidRuntime: FATAL EXCEPTION: main
        java.lang.NoClassDefFoundError: com.android.volley.toolBox.Volley

调用Volley时如下：

        queue = Volley.newRequestQueue(this);

Gradle编辑以支持库：

dependencies {
    compile files('libs/android-support-v4.jar')
    compile files('libs/volley.jar')
}

有人介意我指向正确的方向吗？

Exception java.lang.NoClassDefFoundError: com.google.android.gms.common.AccountPicker

在这里找到了修复.

基本上,打开命令提示符(或终端)并导航到项目目录.在Windows上使用以下命令：

对于Windows用户：
gradlew.bat干净

对于mac用户输入：./ gradlew clean

然后重新加载Android Studio,然后重试！