Caused by: java.lang.ClassNotFoundException: Didn't find class "okhttp3.internal.Platform"

错误日志

Caused by: java.lang.ClassNotFoundException: Didn’t find class “okhttp3.internal.Platform” on path: DexPathList
完整错误日志：

    java.lang.IllegalStateException: Fatal Exception thrown on Scheduler.Worker thread.
        at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:62)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422)
        at java.util.concurrent.FutureTask.run(FutureTask.java:237)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:152)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:265)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
        at java.lang.Thread.run(Thread.java:831)
     Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Lokhttp3/internal/Platform;
        at okhttp3.logging.HttpLoggingInterceptor$Logger$1.log(HttpLoggingInterceptor.java:109)
        at okhttp3.logging.HttpLoggingInterceptor.intercept(HttpLoggingInterceptor.java:157)
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
        at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:185)
        at okhttp3.RealCall.execute(RealCall.java:69)
        at retrofit2.OkHttpCall.execute(OkHttpCall.java:180)
        at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$RequestArbiter.request(RxJavaCallAdapterFactory.java:171)
        at rx.internal.operators.OperatorSubscribeOn$1$1$1$1.call(OperatorSubscribeOn.java:85)
        at rx.internal.schedulers.CachedThreadScheduler$EventLoopWorker$1.call(CachedThreadScheduler.java:222)
        at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422) 
        at java.util.concurrent.FutureTask.run(FutureTask.java:237) 
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:152) 
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:265) 
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) 
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 
        at java.lang.Thread.run(Thread.java:831) 
     Caused by: java.lang.ClassNotFoundException: Didn't find class "okhttp3.internal.Platform" on path: DexPathList[[zip file "/data/app/com.augurit.agmobile.agwater-1/base.apk"],nativeLibraryDirectories=[/data/app/com.augurit.agmobile.agwater-1/lib/arm, /vendor/lib, /system/lib]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
        at okhttp3.logging.HttpLoggingInterceptor$Logger$1.log(HttpLoggingInterceptor.java:109) 
        at okhttp3.logging.HttpLoggingInterceptor.intercept(HttpLoggingInterceptor.java:157) 
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) 
        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67) 
        at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:185) 
        at okhttp3.RealCall.execute(RealCall.java:69) 
        at retrofit2.OkHttpCall.execute(OkHttpCall.java:180) 
        at retrofit2.adapter.rxjava.RxJavaCallAdapterFactory$RequestArbiter.request(RxJavaCallAdapterFactory.java:171) 
        at rx.internal.operators.OperatorSubscribeOn$1$1$1$1.call(OperatorSubscribeOn.java:85) 
        at rx.internal.schedulers.CachedThreadScheduler$EventLoopWorker$1.call(CachedThreadScheduler.java:222) 
        at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55) 
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422) 
        at java.util.concurrent.FutureTask.run(FutureTask.java:237) 
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:152) 
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:265) 
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) 
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 
        at java.lang.Thread.run(Thread.java:831) 
    	Suppressed: java.lang.ClassNotFoundException: okhttp3.internal.Platform
        at java.lang.Class.classForName(Native Method)
        at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
        at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
        		... 19 more
     Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available

产生背景

移植老项目某一个功能模块到新项目中，启动那个功能时报错

分析原因

1. 根据错误日志描述，大致意思是说 找不到 类：okhttp3.internal.Platform；
2. 手动检查包里面是否真的没有这个类；
   打开项目的external Libraries；
   找到 okhttp3的gradle；
   查看包的详情；
   
3. 由上图可知，并没有 okhttp3.internal.Platform 这个类，既然没有这个类，错误原因就是，代码中引用了这个不存在的类！
4. 知道原因接下来就好办，继续看错误日志，找到引用这个类的代码！
   查找错误日志，点进去；
   
5. 果然问题就在HttpLoggingInterceptor这个类里面！as都显示红色的Platform
6. 到这里，已经定位到错误原因了：HttpLoggingInterceptor 这个类引用了不存在的Platform 这个类！所以猜想我们自己的代码使用了HttpLoggingInterceptor这个类导致报错！点开这个类，查看有哪些地方使用了这个HttpLoggingInterceptor类；
   
7. 由上图可知，自己写的类AMOKHttpManager 使用了HttpLoggingInterceptor；剩下的就是修改自己的代码啦！

解决办法

方法1

升级com.suquareup.ohttp3:loggin-interceptor:3.1.2（太老了）；
后面的3.1.2与 com.squareup.ohttp3:okhttp:3.8.0 版本保持一致；
一般在app的build.gradle里面修改dependencies即可；

方法2

由于我的是新旧老项目一块的。okhttp也是间接引入，所以另想他法；
【按两下shift】搜索 HttpLoggingInterceptor

由上图可知，我这里存在两个HttpLoggingInterceptor，又想到这是两个项目的合并，所以大致可能猜到：项目中倒错了包，导致这个错误的发生；=所以解决办法就是找到引用文件，换个包就行啦！

总结

写项目；导包的时候要注意啦，不能随手不看乱导一个！