android - IllegalStateException: parcel.readString() must not be null -


i put parcelable object in intent next activity:

val intent = intent(mcontext, showtestactivity::class.java) intent.putextra("test", test) log.d("mylog", "${intent.getparcelableextra<test>("test")}") // no problem mcontext.startactivity(intent)

and object in next activity:

if (!intent.hasextra("test")) throw exception("intent doesn't has 'test' extra") val test: test = intent.getparcelableextra("test")

and here throwing exception:

public open class qbase(): parcelable {   ...   protected constructor(parcel: parcel?) : this() {       parcel?.let {           question = parcel.readstring() // parcel.readstring() must not null           helptext = parcel.readstring()           qvalue = parcel.readdouble()           qtype = qtype.valueof(parcel.readstring())       }   }   override fun writetoparcel(parcel: parcel, flags: int) {       parcel.writestring(question)       parcel.writestring(helptext)       parcel.writedouble(qvalue)       parcel.writestring(qtype.name)  }   ... }

and in test:

public class test(): parcelable {   ...   public var questions: arraylist<qbase> = arraylist()    constructor(parcel: parcel?): this() {       parcel?.let {         ...         parcel.readtypedlist(questions, qbase.creator)       }   }    override fun writetoparcel(p: parcel?, p1: int) {       p?.let {           ...           it.writetypedlist(questions)       }    }    ... }

it exception:

caused by: java.lang.illegalstateexception: parcel.readstring() must not null @ com.vadim.hasdfa.justlearn.model.questions.utils.qbase.(qbase.kt:22) @ com.vadim.hasdfa.justlearn.model.questions.utils.qbase$creator.createfromparcel(qbase.kt:70) @ com.vadim.hasdfa.justlearn.model.questions.utils.qbase$creator.createfromparcel(qbase.kt:68) @ android.os.parcel.readtypedlist(parcel.java:2432) @ com.vadim.hasdfa.justlearn.model.test.(test.kt:28) @ com.vadim.hasdfa.justlearn.model.test$creator.createfromparcel(test.kt:47) @ com.vadim.hasdfa.justlearn.model.test$creator.createfromparcel(test.kt:45) @ android.os.parcel.readparcelable(parcel.java:2787) @ android.os.parcel.readvalue(parcel.java:2681) @ android.os.parcel.readarraymapinternal(parcel.java:3048) @ android.os.basebundle.unparcel(basebundle.java:257) @ android.os.basebundle.containskey(basebundle.java:435) @ android.content.intent.hasextra(intent.java:6859) @ com.vadim.hasdfa.justlearn.controller.activity.browsetest.showtestactivity.oncreate(showtestactivity.kt:28) @ android.app.activity.performcreate(activity.java:6980) @ android.app.instrumentation.callactivityoncreate(instrumentation.java:1213) @ android.app.activitythread.performlaunchactivity(activitythread.java:2770) @ android.app.activitythread.handlelaunchactivity(activitythread.java:2892)  @ android.app.activitythread.-wrap11(unknown source:0)  @ android.app.activitythread$h.handlemessage(activitythread.java:1593)  @ android.os.handler.dispatchmessage(handler.java:105)  @ android.os.looper.loop(looper.java:164)  @ android.app.activitythread.main(activitythread.java:6540)  @ java.lang.reflect.method.invoke(native method)  @ com.android.internal.os.zygote$methodandargscaller.run(zygote.java:240)  @ com.android.internal.os.zygoteinit.main(zygoteinit.java:767) 


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