java.lang.NoClassDefFoundError：okhttp3.OkHttpClient $ Builder

Question

在我的项目中，我已经使用OkHttp（版本2.5.0）作为我的网络请求库。但是几天前，我尝试将Retrofit2作为应用程序的网络请求库的一部分，正如您所知，新的Retrofit2库依赖于OkHttp（版本3.2.0）。因此，当我的应用程序在其android
android 5.0下的版本始终会导致崩溃（较大的版本运行良好且不会导致崩溃），崩溃堆栈信息如下所示：

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)

从堆栈跟踪中，我猜想OkHttp（版本3.2.0）与OkHttp（版本2.5.0）有一些冲突。下面我将给出我的外部库配置：

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'

希望任何知道问题的人都能帮我一个忙！十分感谢！

更新1： 这是我的 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);
    }
}

Answer 1

是的，终于我找到了问题并解决了。我在这里查看了类似的问题
，发现可能是 **64K方法**可能导致此问题，所以我来到官方网站http://codingdict.com/questions/118471查看 使用64K以上方法构建应用程序 。现在，您应该在build.gradle文件中编译multidex库：

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

并且不要忘记配置您的defaultConfig：

android {
  defaultConfig {
    multiDexEnabled true
  }
}

最后，你可以写一个 BaseApplication 延伸到 应用 ，在写 attachBaseContext（上下文基地）
方法如下：

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

不要忘记将其添加到您的AndroidManifest.xml文件中：

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