Question

当我尝试在Android 4.4.2上运行现有应用程序（使用Android Studio 3.1.3）时，该应用程序未运行并显示此错误：

E/AndroidRuntime: FATAL EXCEPTION: main
              Process: my.project, PID: 9428
              java.lang.NoClassDefFoundError: uz/uno/models/Transaction
                  at java.lang.Class.getDeclaredFields(Native Method)
                  at java.lang.Class.getDeclaredFields(Class.java:610)
                  at com.activeandroid.util.ReflectionUtils.getDeclaredColumnFields(ReflectionUtils.java:73)
                  at com.activeandroid.TableInfo.<init>(TableInfo.java:66)
                  at com.activeandroid.ModelInfo.loadModelFromMetaData(ModelInfo.java:101)
                  at com.activeandroid.ModelInfo.<init>(ModelInfo.java:61)
                  at com.activeandroid.Cache.initialize(Cache.java:66)
                  at com.activeandroid.ActiveAndroid.initialize(ActiveAndroid.java:44)
                  at com.activeandroid.ActiveAndroid.initialize(ActiveAndroid.java:34)
                  at com.activeandroid.content.ContentProvider.onCreate(ContentProvider.java:39)
                  at android.content.ContentProvider.attachInfo(ContentProvider.java:1591)
                  at android.content.ContentProvider.attachInfo(ContentProvider.java:1562)
                  at android.app.ActivityThread.installProvider(ActivityThread.java:5233)
                  at android.app.ActivityThread.installContentProviders(ActivityThread.java:4827)
                  at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4710)
                  at android.app.ActivityThread.access$1600(ActivityThread.java:174)
                  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1367)
                  at android.os.Handler.dispatchMessage(Handler.java:102)
                  at android.os.Looper.loop(Looper.java:146)
                  at android.app.ActivityThread.main(ActivityThread.java:5593)
                  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:1283)
                  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
                  at dalvik.system.NativeStart.main(Native Method)
               Caused by: java.lang.ClassNotFoundException: Didn't find class "my.project.models.Transaction" on path: DexPathList[[zip file "/data/app/my.project-5.apk"],nativeLibraryDirectories=[/data/app-lib/my.project-5, /vendor/lib, /system/lib]]
                  at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:67)
                  at java.lang.ClassLoader.loadClass(ClassLoader.java:497)

请注意以下异常：

Caused by: java.lang.ClassNotFoundException: Didn't find class "my.project.models.Transaction" on path: DexPathList[[zip file "/data/app/my.project-5.apk"],nativeLibraryDirectories=[/data/app-lib/my.project-5, /vendor/lib, /system/lib]]

我发现，每次尝试运行并崩溃时，异常中的数字都会增加my.project-5。（第一次是my.project-1，然后是my.project-2，依此类推。）

问题出在哪里，如何解决此错误？

注意：android 4.3上也会发生此错误。但是，对于android 5.0及更高版本，它运行良好。

编辑：答案 经过研究，我在这里找到了答案：

Answer 1

我认为您与一些至少需要android 5.0的代码存在冲突，但是您在4.4.2中运行。请参见以下文档：https://developer.android.com/training/basics/supporting-devices/platforms和此处：https://developer.android.com/guide/practices/compatibility

发布代码，以便我们为您提供更好的帮助。

Android 4.4.2上的异常“ java.lang.ClassNotFoundException：未找到类...”

1 个答案: