【发布时间】：2020-01-21 07:37:51
【问题描述】：
我有一个活动和一个没有默认构造函数的演示者，注入了 koin：
class HomeActivityPresenter<V : HomeActivityNav>(dataManager: DataManager, schedulerProvider: SchedulerProvider) :
BaseViewModel<V>(dataManager, schedulerProvider) HomeActivityListener, Serializable {
在活动中，我使用addFragment 方法为片段充气：
fun AppCompatActivity.addFragment(fragment: Fragment, frameId: Int) {
supportFragmentManager.inTransaction { add(frameId, fragment) }
}
我正在使用Don't keep activities 测试我的应用程序。当活动打开时，我按下主页按钮将我的应用程序置于后台。当活动恢复时，我遇到了这个崩溃：
java.lang.RuntimeException: Unable to start activity ComponentInfopackagename.ui.features.home.activity.HomeActivity}: java.lang.RuntimeException: Parcelable encountered IOException reading a Serializable object (name = packagename.ui.features.home.activity.HomeActivityPresenter)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3270)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
Caused by: java.lang.RuntimeException: Parcelable encountered IOException reading a Serializable object (name = packagename.ui.features.home.activity.HomeActivityPresenter)
at android.os.Parcel.readSerializable(Parcel.java:3136)
at android.os.Parcel.readValue(Parcel.java:2917)
at android.os.Parcel.readArrayMapInternal(Parcel.java:3244)
at android.os.BaseBundle.initializeFromParcelLocked(BaseBundle.java:292)
at android.os.BaseBundle.unparcel(BaseBundle.java:236)
at android.os.BaseBundle.getString(BaseBundle.java:1160)
at android.os.BaseBundle.getString(BaseBundle.java:1182)
at packagename.ui.features.orderstatus.PickupOrderStatusDetailFragment.onCreate(PickupOrderStatusDetailFragment.kt:49)
at androidx.fragment.app.Fragment.performCreate(Fragment.java:2586)
at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManagerImpl.java:838)
at androidx.fragment.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManagerImpl.java:1238)
at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManagerImpl.java:1303)
at androidx.fragment.app.FragmentManagerImpl.dispatchStateChange(FragmentManagerImpl.java:2659)
at androidx.fragment.app.FragmentManagerImpl.dispatchCreate(FragmentManagerImpl.java:2607)
at androidx.fragment.app.FragmentController.dispatchCreate(FragmentController.java:235)
at androidx.fragment.app.FragmentActivity.onCreate(FragmentActivity.java:316)
at androidx.appcompat.app.AppCompatActivity.onCreate(AppCompatActivity.java:106)
at packagename.features.home.activity.HomeActivity.onCreate(HomeActivity.kt:84)
at android.app.Activity.performCreate(Activity.java:7802)
at android.app.Activity.performCreate(Activity.java:7791)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1299)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
Caused by: java.io.InvalidClassException: packagename.ui.features.home.activity.HomeActivityPresenter; no valid constructor
at java.io.ObjectStreamClass$ExceptionInfo.newInvalidClassException(ObjectStreamClass.java:154)
at java.io.ObjectStreamClass.checkDeserialize(ObjectStreamClass.java:798)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1873)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1412)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:427)
at android.os.Parcel.readSerializable(Parcel.java:3134)
at android.os.Parcel.readValue(Parcel.java:2917)
at android.os.Parcel.readArrayMapInternal(Parcel.java:3244)
at android.os.BaseBundle.initializeFromParcelLocked(BaseBundle.java:292)
at android.os.BaseBundle.unparcel(BaseBundle.java:236)
at android.os.BaseBundle.getString(BaseBundle.java:1160)
at android.os.BaseBundle.getString(BaseBundle.java:1182)
at packagename.ui.features.orderstatus.PickupOrderStatusDetailFragment.onCreate(PickupOrderStatusDetailFragment.kt:49)
at androidx.fragment.app.Fragment.performCreate(Fragment.java:2586)
at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManagerImpl.java:838)
at androidx.fragment.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManagerImpl.java:1238)
at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManagerImpl.java:1303)
at androidx.fragment.app.FragmentManagerImpl.dispatchStateChange(FragmentManagerImpl.java:2659)
at androidx.fragment.app.FragmentManagerImpl.dispatchCreate(FragmentManagerImpl.java:2607)
at androidx.fragment.app.FragmentController.dispatchCreate(FragmentController.java:235)
at androidx.fragment.app.FragmentActivity.onCreate(FragmentActivity.java:316)
at androidx.appcompat.app.AppCompatActivity.onCreate(AppCompatActivity.java:106)
at packagename.ui.features.home.activity.HomeActivity.onCreate(HomeActivity.kt:84)
at android.app.Activity.performCreate(Activity.java:7802)
at android.app.Activity.performCreate(Activity.java:7791)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1299)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
这是我的崩溃指向的片段上的第 49 行：
val orderStatus = args.getString(Constants.pickUpOrderCreate, "")
我不知道如何解决这个问题。
【问题讨论】：
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引起：java.io.InvalidClassException：packagename.ui.features.home.activity.HomeActivityPresenter;没有有效的构造函数
标签： java android kotlin serialization ioexception