java.io.NotSerializableException与Kotlin中可序列化的数据类(kotlinx.ser

Question

当试图将writeObject和data class的对象转换为ObjectOutputStream时，我正面临java.io.NotSerializableException。以下是我项目的主要活动函数:

class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
debug()
}
fun debug() {
val oos = ObjectOutputStream(ByteArrayOutputStream())
val obj = BaseElement("HELLO WORLD")
try{
oos.writeObject(obj)
}
catch(e : Exception) {
Log.d("mydebug", e.stackTraceToString())
}
}
}

BaseElement类可以在这里找到:

import kotlinx.serialization.Serializable
@Serializable
data class BaseElement(var sentence : String)

堆栈跟踪如下:

java.io.NotSerializableException: com.example.myproject.model.BaseElement
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1240)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:354)
at com.example.myproject.MainActivity.debug(MainActivity.kt:29)
at com.example.myproject.MainActivity.onCreate(MainActivity.kt:17)
at android.app.Activity.performCreate(Activity.java:8130)
at android.app.Activity.performCreate(Activity.java:8110)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1343)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3781)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3977)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:109)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2374)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loopOnce(Looper.java:233)
at android.os.Looper.loop(Looper.java:344)
at android.app.ActivityThread.main(ActivityThread.java:8248)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:589)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1071)

谁来告诉我这个问题的解决方法。

Answer 1

实现可序列化接口

import kotlinx.serialization.Serializable

data class BaseElement(var sentence : String) : Serializable