导航库充气器针对数据类抛出ClassNotFoundException

Question

在导航库版本alpha09 +（使用alpha11）中，我在我的导航图中定义为argType的一个数据类遇到ClassNotFoundException。

app:argType="com.package.app.data.model.user.User.Full"

此类确实存在。降级回alpha08时，似乎没有发生此问题。

这是完整的堆栈跟踪：

2019-01-28 10:30:32.028 6970-6970/com.package.app.debug E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.package.app.debug, PID: 6970
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.package.app.debug/com.package.app.ui.MainActivity}: android.view.InflateException: Binary XML file line #53: Binary XML file line #53: Error inflating class fragment
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2913)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
    at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
    at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
    at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
 Caused by: android.view.InflateException: Binary XML file line #53: Binary XML file line #53: Error inflating class fragment
 Caused by: android.view.InflateException: Binary XML file line #53: Error inflating class fragment
 Caused by: java.lang.RuntimeException: Exception inflating com.package.app.debug:navigation/navigation_main line 376
    at androidx.navigation.NavInflater.inflate(NavInflater.java:89)
    at androidx.navigation.NavController.setGraph(NavController.java:424)
    at androidx.navigation.NavController.setGraph(NavController.java:406)
    at androidx.navigation.fragment.NavHostFragment.onCreate(NavHostFragment.java:226)
    at androidx.fragment.app.Fragment.performCreate(Fragment.java:2414)
    at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManager.java:1418)
    at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManager.java:1684)
    at androidx.fragment.app.FragmentManagerImpl.addFragment(FragmentManager.java:1930)
    at androidx.fragment.app.FragmentManagerImpl.onCreateView(FragmentManager.java:3745)
    at androidx.fragment.app.FragmentController.onCreateView(FragmentController.java:120)
    at androidx.fragment.app.FragmentActivity.dispatchFragmentsOnCreateView(FragmentActivity.java:405)
    at androidx.fragment.app.FragmentActivity.onCreateView(FragmentActivity.java:387)
    at co.lokalise.android.sdk.core.LokaliseLayoutInflater$PrivateWrapperFactory2.onCreateView(LokaliseLayoutInflater.java:362)
    at android.view.LayoutInflater$FactoryMerger.onCreateView(LayoutInflater.java:186)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:780)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:866)
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
    at co.lokalise.android.sdk.core.LokaliseLayoutInflater.inflate(LokaliseLayoutInflater.java:84)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
    at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:469)
    at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
    at com.package.app.ui.MainActivity.onCreate(MainActivity.kt:75)
    at android.app.Activity.performCreate(Activity.java:7136)
    at android.app.Activity.performCreate(Activity.java:7127)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2893)
2019-01-28 10:30:32.031 6970-6970/com.package.app.debug E/AndroidRuntime:     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
    at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
    at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
    at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
 Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: com.package.app.data.model.user.User.Full
    at androidx.navigation.NavType.fromArgType(NavType.java:180)
    at androidx.navigation.NavInflater.inflateArgument(NavInflater.java:181)
    at androidx.navigation.NavInflater.inflateArgumentForDestination(NavInflater.java:145)
    at androidx.navigation.NavInflater.inflate(NavInflater.java:120)
    at androidx.navigation.NavInflater.inflate(NavInflater.java:131)
    at androidx.navigation.NavInflater.inflate(NavInflater.java:80)
        ... 41 more
 Caused by: java.lang.ClassNotFoundException: com.package.app.data.model.user.User.Full
    at java.lang.Class.classForName(Native Method)
    at java.lang.Class.forName(Class.java:453)
    at java.lang.Class.forName(Class.java:378)
    at androidx.navigation.NavType.fromArgType(NavType.java:168)
        ... 46 more
 Caused by: java.lang.ClassNotFoundException: Didn't find class "com.package.app.data.model.user.User.Full" on path: DexPathList[[zip file "/system/framework/org.apache.http.legacy.boot.jar", zip file "/data/app/com.package.app.debug-7IobagfWCqi3XccTjnUgwg==/base.apk", zip file "/data/app/com.package.app.debug-7IobagfWCqi3XccTjnUgwg==/split_lib_dependencies_apk.apk", zip file "/data/app/com.package.app.debug-7IobagfWCqi3XccTjnUgwg==/split_lib_resources_apk.apk", zip file "/data/app/com.package.app.debug-7IobagfWCqi3XccTjnUgwg==/split_lib_slice_0_apk.apk", zip file "/data/app/com.package.app.debug-7IobagfWCqi3XccTjnUgwg==/split_lib_slice_1_apk.apk", zip file "/data/app/com.package.app.debug-7IobagfWCqi3XccTjnUgwg==/split_lib_slice_2_apk.apk", zip file "/data/app/com.package.app.debug-7IobagfWCqi3XccTjnUgwg==/split_lib_slice_3_apk.apk", zip file "/data/app/com.package.app.debug-7IobagfWCqi3XccTjnUgwg==/split_lib_slice_4_apk.apk", zip file "/data/app/com.package.app.debug-7IobagfWCqi3XccTjnUgwg==/split_lib_slice_5_apk.apk", zip file "/data/app/com.package.app.debug-7IobagfWCqi3XccTjnUgwg==/split_lib_slice_6_apk.apk", zip file "/data/app/com.package.app.debug-7IobagfWCqi3XccTjnUgwg==/split_lib_slice_7_apk.apk", zip file "/data/app/com.package.app.debug-7IobagfWCqi3XccTjnUgwg==/split_lib_slice_8_apk.apk", zip file "/data/app/com.package.app.debug-7IobagfWCqi3XccTjnUgwg==/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/data/app/com.package.app.debug-7IobagfWCqi3XccTjnUgwg==/lib/x86, /system/lib]]
    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
        ... 50 more
    Suppressed: java.io.IOException: No original dex files found for dex location /data/app/com.package.app.debug-7IobagfWCqi3XccTjnUgwg==/split_lib_resources_apk.apk
    at dalvik.system.DexFile.openDexFileNative(Native Method)
    at dalvik.system.DexFile.openDexFile(DexFile.java:354)
    at dalvik.system.DexFile.<init>(DexFile.java:101)
    at dalvik.system.DexFile.<init>(DexFile.java:75)
    at dalvik.system.DexPathList.loadDexFile(DexPathList.java:394)
    at dalvik.system.DexPathList.makeDexElements(DexPathList.java:354)
    at dalvik.system.DexPathList.<init>(DexPathList.java:164)
2019-01-28 10:30:32.031 6970-6970/com.package.app.debug E/AndroidRuntime:     at dalvik.system.BaseDexClassLoader.<init>(BaseDexClassLoader.java:74)
    at dalvik.system.BaseDexClassLoader.<init>(BaseDexClassLoader.java:65)
    at dalvik.system.PathClassLoader.<init>(PathClassLoader.java:64)
    at com.android.internal.os.ClassLoaderFactory.createClassLoader(ClassLoaderFactory.java:73)
    at com.android.internal.os.ClassLoaderFactory.createClassLoader(ClassLoaderFactory.java:88)
    at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:74)
    at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:40)
    at android.app.LoadedApk.createOrUpdateClassLoaderLocked(LoadedApk.java:727)
    at android.app.LoadedApk.getClassLoader(LoadedApk.java:810)
    at android.app.LoadedApk.getResources(LoadedApk.java:1032)
    at android.app.ContextImpl.createAppContext(ContextImpl.java:2345)
    at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5749)
    at android.app.ActivityThread.access$1100(ActivityThread.java:199)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1650)
            ... 6 more

我已经将导航库组件从alpha08更新到了alpha11。当他们发布alpha09时，我也进行了更新，并遇到了同样的问题，并认为这是一个错误，因此我等待。现在，问题仍然存在，我似乎无法弄清楚想要出问题的地方。

我已经禁用了ProGuard的调试功能，并缩小并启用了Multidex，以查看是否有帮助。

    debug {
        minifyEnabled false
        useProguard false
        versionNameSuffix '-DEBUG'
        applicationIdSuffix '.debug'
    }

该类也已添加到proguard-rules中，以查看是否可行。

-keep class com.package.app.data.model.** { *; } 

就我而言，这应该起作用吗？ Android Studio也会像这样完全为我生成XML。

谢谢。

Answer 1

我遇到了同样的问题，我的argType是作为片段子类的类。我把那个班级移出了片段，问题得到了解决

Answer 2

毕竟，这是Android Studio中的一个已知错误。

自1.0.0-alpha09发布以来，它们处理内部类的方式有所改变。

如果一个包裹对象是一个内部类，则必须这样写： com.domain.app.User$Full，其中“ Full”是包裹的对象。

如果您想了解更多信息，请在Google的问题跟踪器中查看以下答案：https://issuetracker.google.com/u/2/issues/123614632#comment4

Answer 3

刚刚遇到了与此问题类似的问题，我意识到我没有设置任何保护规则。这里的其他信息可能会有所帮助。

在导航组件版本2.2.0-rc02中可以找到以下代码。

// NavType.java
try {
    String className;
    if (type.startsWith(".") && packageName != null) {
        className = packageName + type;
    } else {
        className = type;
    }

    if (type.endsWith("[]")) {
        className = className.substring(0, className.length() - 2);
        Class<?> clazz = Class.forName(className);
        if (Parcelable.class.isAssignableFrom(clazz)) {
            return new ParcelableArrayType(clazz);
        } else if (Serializable.class.isAssignableFrom(clazz)) {
            return new SerializableArrayType(clazz);
        }
    } else {
        Class<?> clazz = Class.forName(className);
        if (Parcelable.class.isAssignableFrom(clazz)) {
            return new ParcelableType(clazz);
        } else if (Enum.class.isAssignableFrom(clazz)) {
            return new EnumType(clazz);
        } else if (Serializable.class.isAssignableFrom(clazz)) {
            return new SerializableType(clazz);
        }
    }
    throw new IllegalArgumentException(className + " is not Serializable or "
            + "Parcelable.");
} catch (ClassNotFoundException e) {
    throw new RuntimeException(e);
}

您可以看到它使用Class.forName(String)方法查找类。因此，保留他们的名字就足够了。

# Instead of -keep
-keepnames class com.package.app.data.model.** { *; }

如果提供了packageName，则可以从argType属性的值中省略包名称，但是遗憾的是，如果您根据构建版本使用某些应用程序ID后缀，则无法使用。 （因此，请勿从argType中忽略软件包名称）