java.lang.NoClassDefFoundError：okhttp3.OkHttpClient $ Builder

在我的項目中，我使用了OkHttp（版本2.5.0）作爲我的網絡請求庫。但是前幾天，我嘗試將Retrofit2作爲我的應用程序的網絡請求庫的一部分，正如您所知的那樣，新的Retrofit2庫對OkHttp（版本3.2.0）的依賴。因此，當我的應用在android下的是Android 5.0的版本總是會引起崩潰（放大版運作良好，並不會造成崩潰），崩潰堆棧信息顯示如下：

04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err: java.lang.NoClassDefFoundError: okhttp3.OkHttpClient$Builder 
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err:  at com.comingx.athit.client.ServiceGenerator.<clinit>(ServiceGenerator.java:22) 
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err:  at com.comingx.athit.ui.fragments.CircleNativeFragment.onViewCreated(CircleNativeFragment.java:105) 
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err:  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1086) 
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err:  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1252) 
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err:  at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:742) 
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err:  at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1617) 
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err:  at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:517) 
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err:  at android.os.Handler.handleCallback(Handler.java:808) 
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err:  at android.os.Handler.dispatchMessage(Handler.java:103) 
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err:  at android.os.Looper.loop(Looper.java:193) 
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err:  at android.app.ActivityThread.main(ActivityThread.java:5348) 
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err:  at java.lang.reflect.Method.invokeNative(Native Method) 
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err:  at java.lang.reflect.Method.invoke(Method.java:515) 
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err:  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:829) 
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err:  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:645) 
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err:  at dalvik.system.NativeStart.main(Native Method) 
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err: java.lang.NoClassDefFoundError: okhttp3.OkHttpClient$Builder 
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err:  at com.comingx.athit.client.ServiceGenerator.<clinit>(ServiceGenerator.java:22) 
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err:  at com.comingx.athit.ui.fragments.CircleNativeFragment.onViewCreated(CircleNativeFragment.java:105) 
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err:  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1086) 
04-15 21:28:51.185 17238-17238/com.comingx.athit W/System.err:  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1252) 
04-15 21:28:51.186 17238-17238/com.comingx.athit W/System.err:  at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:742) 
04-15 21:28:51.186 17238-17238/com.comingx.athit W/System.err:  at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1617) 
04-15 21:28:51.186 17238-17238/com.comingx.athit W/System.err:  at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:517) 
04-15 21:28:51.186 17238-17238/com.comingx.athit W/System.err:  at android.os.Handler.handleCallback(Handler.java:808) 
04-15 21:28:51.186 17238-17238/com.comingx.athit W/System.err:  at android.os.Handler.dispatchMessage(Handler.java:103) 
04-15 21:28:51.186 17238-17238/com.comingx.athit W/System.err:  at android.os.Looper.loop(Looper.java:193) 
04-15 21:28:51.186 17238-17238/com.comingx.athit W/System.err:  at android.app.ActivityThread.main(ActivityThread.java:5348) 
04-15 21:28:51.186 17238-17238/com.comingx.athit W/System.err:  at java.lang.reflect.Method.invokeNative(Native Method) 
04-15 21:28:51.186 17238-17238/com.comingx.athit W/System.err:  at java.lang.reflect.Method.invoke(Method.java:515) 
04-15 21:28:51.186 17238-17238/com.comingx.athit W/System.err:  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:829) 
04-15 21:28:51.186 17238-17238/com.comingx.athit W/System.err:  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:645) 
04-15 21:28:51.186 17238-17238/com.comingx.athit W/System.err:  at dalvik.system.NativeStart.main(Native Method)

從堆棧跟蹤，我想這OkHttp（3.2.0版本）有一些與OkHttp（版本2.5.0）衝突。下面我會給我的外部庫配置：

compile 'com.squareup.okhttp:okhttp:2.5.0' 
compile 'com.squareup.okhttp3:okhttp:3.2.0' 
compile 'com.google.code.gson:gson:2.6.2' 
compile 'com.squareup.retrofit2:retrofit:2.0.1' 
compile 'com.squareup.retrofit2:converter-gson:2.0.1'

希望任何知道這個問題的人都能幫我一個忙！萬分感謝！

更新1： 這是我ServiceGenerator.java：

package com.comingx.athit.client; 

import com.comingx.athit.model.Constants; 
import com.comingx.athit.model.modelmanager.ModelManagerSingleton; 

import java.io.IOException; 

import okhttp3.Interceptor; 
import okhttp3.OkHttpClient; 
import okhttp3.Request; 
import okhttp3.Response; 
import retrofit2.Retrofit; 
import retrofit2.converter.gson.GsonConverterFactory; 

public class ServiceGenerator { 
    private static OkHttpClient httpClient = new OkHttpClient.Builder().addInterceptor(
      new Interceptor() { 
       @Override 
       public Response intercept(Chain chain) throws IOException { 
        Request request = chain.request() 
          .newBuilder().addHeader("Cookie", ModelManagerSingleton.getNative_cookie()).build(); 
        return chain.proceed(request); 
       } 
      } 
    ).build(); 
    private static Retrofit.Builder builder = 
      new Retrofit.Builder() 
        .baseUrl(Constants.V3.API_PREFIX) 
        .addConverterFactory(GsonConverterFactory.create()); 

    public static <T> T createService(Class<T> serviceClass) { 
     Retrofit retrofit = builder.client(httpClient).build(); 
     return retrofit.create(serviceClass); 
    } 
}

來源

2016-04-15 wizChen

要貼上'com.comingx.athit.client.ServiceGenerator'的代碼？ – srain

它看起來像OkHttp 3被設計爲允許與早期的OkHttp搭配，如通過使用不同的包名稱來判斷。因此，我傾向於猜測：（1）實際上你的運行時類路徑中沒有OkHttp 3，或者（2）你的類路徑中的OkHttp 3不完整，或者（3）'com.comingx.athit .client.ServiceGenerator'，不管那是什麼，都需要一個不同的版本，或許是更早的版本。 –

我認爲你可以刪除2行'compile'com.squareup.okhttp：okhttp：2.5.0' compile'com.squareup.okhttp3：okhttp：3.2.0'' – BNK

是的，我終於找到問題並解決它。我查看了類似問題here並發現可能會導致該問題，所以我來到official site 查看構建超過64K方法的應用程序。現在你應該編譯你的build.gradle文件中multidex庫：

compile 'com.android.support:multidex:1.0.1'

而且不要忘了你的配置defaultConfig：

android { 
    defaultConfig { 
    multiDexEnabled true 
    } 
}

最後，你可以寫一個BaseApplication延伸到應用程序，重寫attachBaseContext（Context base）方法如下：

@Override 
    protected void attachBaseContext(Context base) { 
     super.attachBaseContext(base); 
     MultiDex.install(this); 
    }

不要忘記添加到您的AndroidManifest.xml文件：

<application 
     android:name=".BaseApplication" 
     android:allowBackup="true"> 
</application>

來源

2016-04-16 08:32:17 wizChen

java.lang.NoClassDefFoundError：okhttp3.OkHttpClient $ Builder

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