低于 Lollipop 的 Android 版本上的 java.lang.NoClassDefFoundError [英] java.lang.NoClassDefFoundError on Android version lower than Lollipop

问题描述

我有一台装有 Android 21 的 Nexus 5 设备.我正在测试我的项目，没有问题.但是，如果我在带有 Google APIs 19 的模拟器上进行测试，它会显示错误 java.lang.NoClassDefFoundError.如果它在 Lollipop 上运行良好，怎么会出现这个错误?我什至用索尼 4.4 设备问过我的朋友，他的手机也崩溃了.我的编译 SDK 版本为 21，构建工具设置为 21.1.2.我尝试了 gradle clean 并且我正在使用 Android Studio.任何帮助将不胜感激.

I have a Nexus 5 device with Android 21 on it. I am testing my project on it with no problem. However, if I test on an Emulator with Google APIs 19 it shows the error java.lang.NoClassDefFoundError. How could this error occur if it is running well on Lollipop? I even asked my friend with a Sony 4.4 device and it also crashes on his phone. I have my Compile SDK version to 21 and Build Tools set to 21.1.2. I tried gradle clean and I am working on Android Studio. Any help would be highly appreciated.

此错误仅在低于 Lollipop 的设备上发生:

这是出现在 Logcat 中的内容:

This is what appears in Logcat:

02-10 07:46:19.200    2238-2238/com.myproject.android.indonesia E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.myproject.android.indonesia, PID: 2238
    java.lang.NoClassDefFoundError: com.myproject.android.indonesia.task.GetProjectTask$1
            at com.myproject.android.indonesia.task.GetProjectTask.execute(GetProjectTask.java:27)
            at com.myproject.android.indonesia.activity.SplashActivity.launchProjectTask(SplashActivity.java:111)
            at com.myproject.android.indonesia.activity.SplashActivity.onCreate(SplashActivity.java:71)
            at android.app.Activity.performCreate(Activity.java:5231)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
            at android.app.ActivityThread.access$800(ActivityThread.java:135)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5017)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
            at dalvik.system.NativeStart.main(Native Method)

这是调用 getProjectTask() 的代码片段

Here is the snippet that calls the getProjectTask()

GetProjectTask mGetProjectTask = new GetProjectTask(this);
mGetProjectTask.mUrl.append(Constants.Link.HOST).append(Constants.Webservice.GET_PROJECT);
mGetProjectTask.params.put(Constants.Key.PRJ_LICENCE, Constants.Constant.LICENCE);
mGetProjectTask.params.put(Constants.Key.LANGUAGE, currentLanguage);
mGetProjectTask.params.put(Constants.Key.CTY_NAME, Constants.Value.APP_CTY_NAME);
mGetProjectTask.execute();

更新似乎我需要使用我正在使用的 SDK 之一的最新版本来避免此错误(Aviary SDK).当我升级时，这个错误不再出现.

UPDATE It seems that I needed to use the latest version of one of the SDKs I am using to avoid this error (Aviary SDK). When I upgraded, this error did not appear anymore.

推荐答案

您的类(GetProjectTask 中的第一个匿名类)扩展了该平台上不可用的类.

Your class (the first anonymous class in GetProjectTask) extends a class that is not available on that platform.

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