用于onCreate的java.lang.NoSuchMethodException [英] java.lang.NoSuchMethodException for onCreate

问题描述

我在Google Play崩溃日志中看到崩溃，这确实让我很沮丧.

I see crashes in the Google Play crash log that is really stumping me.

java.lang.RuntimeException: 
  at android.app.ActivityThread.performLaunchActivity (ActivityThread.java:3086)
  at android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:3229)
  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$H.handleMessage (ActivityThread.java:1926)
  at android.os.Handler.dispatchMessage (Handler.java:106)
  at android.os.Looper.loop (Looper.java:214)
  at android.app.ActivityThread.main (ActivityThread.java:6981)
  at java.lang.reflect.Method.invoke (Native Method)
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:493)
  at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1445)
Caused by: androidx.fragment.app.Fragment$InstantiationException: 
  at androidx.fragment.app.Fragment.instantiate (Fragment.java:462)
  at androidx.fragment.app.FragmentContainer.instantiate (FragmentContainer.java:50)
  at androidx.fragment.app.FragmentState.instantiate (FragmentState.java:80)
  at androidx.fragment.app.FragmentManagerImpl.restoreAllState (FragmentManager.java:3109)
  at androidx.fragment.app.FragmentController.restoreAllState (FragmentController.java:158)
  at androidx.fragment.app.FragmentActivity.onCreate (FragmentActivity.java:344)
  at androidx.appcompat.app.AppCompatActivity.onCreate (AppCompatActivity.java:85)
  at com.autotask.jbarra.kotlinmvvm.MainActivity.onCreate (MainActivity.kt:102)
  at android.app.Activity.performCreate (Activity.java:7326)
  at android.app.Activity.performCreate (Activity.java:7317)
  at android.app.Instrumentation.callActivityOnCreate (Instrumentation.java:1271)
  at android.app.ActivityThread.performLaunchActivity (ActivityThread.java:3066)

Caused by: java.lang.NoSuchMethodException: 
  at java.lang.Class.getConstructor0 (Class.java:2328)
  at java.lang.Class.getConstructor (Class.java:1725)
  at androidx.fragment.app.Fragment.instantiate (Fragment.java:443)

问题是，主活动的第102行没什么特别的

the thing is, line 102 of Main activity is nothing special

    override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState) //This is line 102

这可能导致什么?为什么oncreate不会抛出这种方法?它正在少数用户的设备上发生，而我却无法复制它.

What could cause this? Why is oncreate throwing no such method? It's happening on a few user's devices and I haven't been able to reproduce it.

推荐答案

正在从实例状态捆绑包恢复活动.恢复操作的一部分是重新创建其片段.

The activity is being restored from an instance state bundle. Part of the restore operation is recreating its fragments.

您的活动有一个片段，并且片段类没有框架所需的0-arg构造函数.

Your activity has a fragment and the fragment class does not have a 0-arg constructor required by the framework.

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