【发布时间】：2018-08-17 13:37:01
【问题描述】：
当我在我的 android 手机上部署我的 android 应用程序时遇到 ClassNotFoundException。
我在 Android 6.0.1 和 Android 7.1.1 的 Android 手机上试过
而当我在 (Nexus 5X API 26) 并运行 Android 8.0 的模拟器上部署相同的应用程序时，我不会遇到任何问题。应用加载顺畅。
Build.gradle(app)文件有
android {
compileSdkVersion 28
defaultConfig {
applicationId "de.pfiva.mobile.voiceassistant"
minSdkVersion 23
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
我已经包含了来自本地 maven 的依赖项。这种依赖基本上有普通的java类（POJO）。在某些类中有 java.time.LocalDateTime 类型的字段
我该如何解决这个问题。寻找建议。
谢谢。
例外：
E/AndroidRuntime: FATAL EXCEPTION: main
Process: de.pfiva.mobile.voiceassistant, PID: 25245
java.lang.NoClassDefFoundError: Failed resolution of: Ljava/time/LocalDateTime;
at java.lang.Class.getDeclaredFields(Native Method)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:150)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:100)
at com.google.gson.Gson.getAdapter(Gson.java:423)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:115)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:164)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:100)
at com.google.gson.Gson.getAdapter(Gson.java:423)
at com.google.gson.internal.bind.CollectionTypeAdapterFactory.create(CollectionTypeAdapterFactory.java:53)
at com.google.gson.Gson.getAdapter(Gson.java:423)
at retrofit2.converter.gson.GsonConverterFactory.responseBodyConverter(GsonConverterFactory.java:64)
at retrofit2.Retrofit.nextResponseBodyConverter(Retrofit.java:330)
at retrofit2.Retrofit.responseBodyConverter(Retrofit.java:313)
at retrofit2.ServiceMethod$Builder.createResponseConverter(ServiceMethod.java:739)
at retrofit2.ServiceMethod$Builder.build(ServiceMethod.java:172)
at retrofit2.Retrofit.loadServiceMethod(Retrofit.java:170)
at retrofit2.Retrofit$1.invoke(Retrofit.java:147)
at java.lang.reflect.Proxy.invoke(Proxy.java:813)
at $Proxy0.getNLUData(Unknown Source)
at de.pfiva.mobile.voiceassistant.activities.MainActivity.onCreate(MainActivity.java:41)
at android.app.Activity.performCreate(Activity.java:6826)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1121)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2656)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2764)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1502)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6173)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:933)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823)
Caused by: java.lang.ClassNotFoundException: Didn't find class "java.time.LocalDateTime" on path: DexPathList[[zip file "/data/app/de.pfiva.mobile.voiceassistant-1/base.apk", zip file "/data/app/de.pfiva.mobile.voiceassistant-1/split_lib_dependencies_apk.apk", zip file "/data/app/de.pfiva.mobile.voiceassistant-1/split_lib_slice_0_apk.apk", zip file "/data/app/de.pfiva.mobile.voiceassistant-1/split_lib_slice_1_apk.apk", zip file "/data/app/de.pfiva.mobile.voiceassistant-1/split_lib_slice_2_apk.apk", zip file "/data/app/de.pfiva.mobile.voiceassistant-1/split_lib_slice_3_apk.apk", zip file "/data/app/de.pfiva.mobile.voiceassistant-1/split_lib_slice_4_apk.apk", zip file "/data/app/de.pfiva.mobile.voiceassistant-1/split_lib_slice_5_apk.apk", zip file "/data/app/de.pfiva.mobile.voiceassistant-1/split_lib_slice_6_apk.apk", zip file "/data/app/de.pfiva.mobile.voiceassistant-1/split_lib_slice_7_apk.apk", zip file "/data/app/de.pfiva.mobile.voiceassistant-1/split_lib_slice_8_apk.apk", zip file "/data/app/de.pfiva.mobile.voiceassistant-1/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/data/app/de.pfiva.mobile.voiceassistant-1/lib/arm64, /system/lib64, /vendor/lib64]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:380)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
at java.lang.Class.getDeclaredFields(Native Method)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:150)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:100)
at com.google.gson.Gson.getAdapter(Gson.java:423)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:115)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:164)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:100)
at com.google.gson.Gson.getAdapter(Gson.java:423)
at com.google.gson.internal.bind.CollectionTypeAdapterFactory.create(CollectionTypeAdapterFactory.java:53)
at com.google.gson.Gson.getAdapter(Gson.java:423)
at retrofit2.converter.gson.GsonConverterFactory.responseBodyConverter(GsonConverterFactory.java:64)
at retrofit2.Retrofit.nextResponseBodyConverter(Retrofit.java:330)
at retrofit2.Retrofit.responseBodyConverter(Retrofit.java:313)
at retrofit2.ServiceMethod$Builder.createResponseConverter(ServiceMethod.java:739)
at retrofit2.ServiceMethod$Builder.build(ServiceMethod.java:172)
at retrofit2.Retrofit.loadServiceMethod(Retrofit.java:170)
at retrofit2.Retrofit$1.invoke(Retrofit.java:147)
at java.lang.reflect.Proxy.invoke(Proxy.java:813)
at $Proxy0.getNLUData(Unknown Source)
at de.pfiva.mobile.voiceassistant.activities.MainActivity.onCreate(MainActivity.java:41)
at android.app.Activity.performCreate(Activity.java:6826)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1121)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2656)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2764)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1502)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6173)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:933)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823)
【问题讨论】：
-
很遗憾，较早的 Android 版本没有
LocalDateTime。你需要一个解决方法as described here。