Kotlin在Android上使用MultiDex进行授权，低于21

我有以下代表…

fun integerPref(initialValue: Int) = object : ObservableProperty<Int>(initialValue) { override fun afterChange(property: KProperty<*>, oldValue: Int, newValue: Int) { getSharedPreference(INTEGER_PREF, EasyInjection.mode) .edit() .putInt(property.toString(), newValue) .apply() } override fun getValue(thisRef: Any?, property: KProperty<*>): Int { return getSharedPreference(INTEGER_PREF, EasyInjection.mode) .getInt(property.toString(), initialValue) } } 

这位代表的目的是处理股票的偏好。 当我的应用程序变成MultiDex时，问题就发生了 。 当我在下面的代码中使用它时，应用程序崩溃。

 class IntroduceActivity : BaseActivity() { private val CURRENT_VERSION = 1 private val introVersion by integerPref() override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_introduce) if (introVersion == CURRENT_VERSION) { finish() } } } 

但是，如果我将代码更改为这一个。 应用程序不崩溃

 class IntroduceActivity : BaseActivity() { private val CURRENT_VERSION = 1 override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_introduce) var introVersion by integerPref() if (introVersion == CURRENT_VERSION) { finish() } } } 

我已阅读此文件，并有一些通知..

https://developer.android.com/studio/build/multidex.html

警告：在Mu​​ltiDex.install（）完成之前，请勿通过反射或JNI执行MultiDex.install（）或任何其他代码。 Multidex跟踪不会跟踪这些调用，导致ClassNotFoundException或由于DEX文件之间的类分区错误而导致验证错误。

总之，我想知道在这种情况下会发生什么。

• 应用程序崩溃发生在Android 21以下
• 科特林代表使用反射
• 为什么从字段变量变为局部变量解决了问题？
• Logcat没有帮助

logcat的

 FATAL EXCEPTION: main java.lang.RuntimeException: Unable to start activity ComponentInfo{com.apg.mobile.som.uat/com.apg.mobile.som.activity.MainActivity}: java.lang.TypeNotPresentException: Type android/support/v4/app/ActivityCompatApi23$SharedElementCallbackImpl not present at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) at android.app.ActivityThread.access$600(ActivityThread.java:141) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:5041) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.TypeNotPresentException: Type android/support/v4/app/ActivityCompatApi23$SharedElementCallbackImpl not present at java.lang.Class.getDeclaredClasses(Native Method) at java.lang.Class.getDeclaredClasses(Class.java:534) at kotlin.reflect.jvm.internal.impl.load.java.structure.reflect.ReflectJavaClass.getInnerClassNames(ReflectJavaClass.kt:35) at kotlin.reflect.jvm.internal.impl.load.java.structure.reflect.ReflectJavaClass.getInnerClassNames(ReflectJavaClass.kt:27) at kotlin.reflect.jvm.internal.impl.load.java.lazy.descriptors.LazyJavaClassMemberScope$nestedClassIndex$1.invoke(LazyJavaClassMemberScope.kt:617) at kotlin.reflect.jvm.internal.impl.load.java.lazy.descriptors.LazyJavaClassMemberScope$nestedClassIndex$1.invoke(LazyJavaClassMemberScope.kt:64) at kotlin.reflect.jvm.internal.impl.storage.LockBasedStorageManager$LockBasedLazyValue.invoke(LockBasedStorageManager.java:323) at kotlin.reflect.jvm.internal.impl.storage.LockBasedStorageManager$LockBasedNotNullLazyValue.invoke(LockBasedStorageManager.java:370) at kotlin.reflect.jvm.internal.impl.load.java.lazy.descriptors.LazyJavaClassMemberScope$nestedClasses$1.invoke(LazyJavaClassMemberScope.kt:626) at kotlin.reflect.jvm.internal.impl.load.java.lazy.descriptors.LazyJavaClassMemberScope$nestedClasses$1.invoke(LazyJavaClassMemberScope.kt:64) at kotlin.reflect.jvm.internal.impl.storage.LockBasedStorageManager$MapBasedMemoizedFunction.invoke(LockBasedStorageManager.java:408) at kotlin.reflect.jvm.internal.impl.load.java.lazy.descriptors.LazyJavaClassMemberScope.getContributedClassifier(LazyJavaClassMemberScope.kt:651) at kotlin.reflect.jvm.internal.impl.resolve.scopes.InnerClassesScopeWrapper.getContributedClassifier(InnerClassesScopeWrapper.kt:29) at kotlin.reflect.jvm.internal.impl.resolve.jvm.JavaDescriptorResolver.resolveClass(JavaDescriptorResolver.kt:38) at kotlin.reflect.jvm.internal.impl.load.java.lazy.SingleModuleClassResolver.resolveClass(ModuleClassResolver.kt:29) at kotlin.reflect.jvm.internal.impl.load.java.lazy.types.JavaTypeResolver.computeTypeConstructor(JavaTypeResolver.kt:132) at kotlin.reflect.jvm.internal.impl.load.java.lazy.types.JavaTypeResolver.computeSimpleJavaClassifierType(JavaTypeResolver.kt:114) at kotlin.reflect.jvm.internal.impl.load.java.lazy.types.JavaTypeResolver.transformJavaClassifierType(JavaTypeResolver.kt:90) at kotlin.reflect.jvm.internal.impl.load.java.lazy.types.JavaTypeResolver.transformJavaType(JavaTypeResolver.kt:52) at kotlin.reflect.jvm.internal.impl.load.java.lazy.descriptors.LazyJavaClassDescriptor$LazyJavaClassTypeConstructor.computeSupertypes(LazyJavaClassDescriptor.kt:178) at kotlin.reflect.jvm.internal.impl.types.AbstractTypeConstructor$supertypes$1.invoke(AbstractTypeConstructor.kt:35) at kotlin.reflect.jvm.internal.impl.types.AbstractTypeConstructor$supertypes$1.invoke(AbstractTypeConstructor.kt:22) at kotlin.reflect.jvm.internal.impl.storage.LockBasedStorageManager$LockBasedLazyValue.invoke(LockBasedStorageManager.java: