问题
In my project, I have used OkHttp(version 2.5.0) as my network request library. But few days ago, I tried Retrofit2 as part of my app's network request library, as you know, the new Retrofit2 library dependence on OkHttp(version 3.2.0).So here comes the problem that when my app runs on android phone whose android version under android 5.0 always causes crash(larger version works well and causes no crash), the crash stack information shows as below:
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)
From the stack trace, I guess that OkHttp(version 3.2.0) has some conflicts with OkHttp(version 2.5.0). Below I will give my external library configuration:
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'
Hope anyone who knows the problem can give me a favor! Great thanks!
Update 1: Here is my 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);
}
}
回答1:
Yes, finally I find the problem and solve it. I viewed a similar problem here and find that maybe the 64K Methods could cause the problem, so I came to official site to view Building Apps with Over 64K Methods. Now you should compile the multidex library in your build.gradle file:
compile 'com.android.support:multidex:1.0.1'
And don't forget to config your defaultConfig:
android {
defaultConfig {
multiDexEnabled true
}
}
And finally you can write a BaseApplication extends to Application, over write the attachBaseContext(Context base) method as follows:
@Override
protected void attachBaseContext(Context base) {
super.attachBaseContext(base);
MultiDex.install(this);
}
Don't forget to add this to your AndroidManifest.xml file:
<application
android:name=".BaseApplication"
android:allowBackup="true">
</application>
来源：https://stackoverflow.com/questions/36649121/java-lang-noclassdeffounderror-okhttp3-okhttpclientbuilder