錯誤的Android

我嘗試使用序列化解析在Androud對象使用序列化的時候，但我不斷收到IOExeption錯誤的Android

E/AndroidRuntime: FATAL EXCEPTION: main 
       Process: com.example.cille_000.laesomondo, PID: 5290 
       java.lang.RuntimeException: Parcelable encountered IOException writing serializable object (name = com.example.cille_000.laesomondo.logic.TestLogic) 
        at android.os.Parcel.writeSerializable(Parcel.java:1526) 
        at android.os.Parcel.writeValue(Parcel.java:1474) 
        at android.os.Parcel.writeArrayMapInternal(Parcel.java:723) 
        at android.os.BaseBundle.writeToParcelInner(BaseBundle.java:1408) 
        at android.os.Bundle.writeToParcel(Bundle.java:1133) 
        at android.os.Parcel.writeBundle(Parcel.java:763) 
        at android.content.Intent.writeToParcel(Intent.java:8655) 
        at android.app.ActivityManagerProxy.startActivity(ActivityManagerNative.java:3052) 
        at android.app.Instrumentation.execStartActivity(Instrumentation.java:1518) 
        at android.app.Activity.startActivityForResult(Activity.java:4224) 
        at android.support.v4.app.BaseFragmentActivityJB.startActivityForResult(BaseFragmentActivityJB.java:48) 
        at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:75) 
        at android.app.Activity.startActivityForResult(Activity.java:4183) 
        at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:856) 
        at android.app.Activity.startActivity(Activity.java:4507) 
        at android.app.Activity.startActivity(Activity.java:4475) 
        at com.example.cille_000.laesomondo.logic.TestLogic.showTextInfo(TestLogic.java:47) 
        at com.example.cille_000.laesomondo.startscreen.TestInfoFragment.onClick(TestInfoFragment.java:44) 
        at android.view.View.performClick(View.java:5610) 
        at android.view.View$PerformClick.run(View.java:22265) 
        at android.os.Handler.handleCallback(Handler.java:751) 
        at android.os.Handler.dispatchMessage(Handler.java:95) 
        at android.os.Looper.loop(Looper.java:154) 
        at android.app.ActivityThread.main(ActivityThread.java:6077) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755) 
       Caused by: java.io.NotSerializableException: com.example.cille_000.laesomondo.startscreen.CreateUserActivity 
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1224) 
        at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1584) 
        at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1549) 
        at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1472) 
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1218) 
        at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1584) 
        at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1549) 
        at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1472) 
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1218) 
        at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:346) 
        at android.os.Parcel.writeSerializable(Parcel.java:1521) 
        at android.os.Parcel.writeValue(Parcel.java:1474)  
        at android.os.Parcel.writeArrayMapInternal(Parcel.java:723)  
        at android.os.BaseBundle.writeToParcelInner(BaseBundle.java:1408)  
        at android.os.Bundle.writeToParcel(Bundle.java:1133)  
        at android.os.Parcel.writeBundle(Parcel.java:763)  
        at android.content.Intent.writeToParcel(Intent.java:8655)  
        at android.app.ActivityManagerProxy.startActivity(ActivityManagerNative.java:3052)  
        at android.app.Instrumentation.execStartActivity(Instrumentation.java:1518)  
        at android.app.Activity.startActivityForResult(Activity.java:4224)  
        at android.support.v4.app.BaseFragmentActivityJB.startActivityForResult(BaseFragmentActivityJB.java:48)  
        at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:75)  
        at android.app.Activity.startActivityForResult(Activity.java:4183)  
        at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:856)  
        at android.app.Activity.startActivity(Activity.java:4507)  
        at android.app.Activity.startActivity(Activity.java:4475)  
        at com.example.cille_000.laesomondo.logic.TestLogic.showTextInfo(TestLogic.java:47)  
        at com.example.cille_000.laesomondo.startscreen.TestInfoFragment.onClick(TestInfoFragment.java:44)  
        at android.view.View.performClick(View.java:5610)  
        at android.view.View$PerformClick.run(View.java:22265)  
        at android.os.Handler.handleCallback(Handler.java:751)  
        at android.os.Handler.dispatchMessage(Handler.java:95)  
        at android.os.Looper.loop(Looper.java:154)  
        at android.app.ActivityThread.main(ActivityThread.java:6077)  
        at java.lang.reflect.Method.invoke(Native Method)  
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)  
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)

我可以看到這個問題是與CreateUserActivity，但我不明白爲什麼。使用序列化的類IM是：

package com.example.cille_000.laesomondo.logic; 


import android.content.Context; 
import android.content.Intent; 
import android.os.Bundle; 

import com.example.cille_000.laesomondo.challengescreen.QuizActivity; 
import com.example.cille_000.laesomondo.challengescreen.ShowTextActivity; 
import com.example.cille_000.laesomondo.challengescreen.TestResultActivity; 
import com.example.cille_000.laesomondo.entities.ReadingTest; 
import com.example.cille_000.laesomondo.entities.User; 

import java.io.Serializable; 
import java.util.ArrayList; 

public class TestLogic implements Serializable{ 
private ReadingTest readingTest; 
private Long startTime, stopTime, startPause, stopPause; 
private ArrayList<Long> pauses = new ArrayList<>(); 
private Long totalTime; 
private int standardReadingSpeed = 3; 
private int correct = 0; 
private transient Context context; 
private User user; 
private int textID; 
private QuizActivity quizActivity; 


public TestLogic(Context context, User user){ 
    this.context = context; 
    this.user = user; 
    readingTest = new ReadingTest(context); 
    quizActivity = new QuizActivity(); 
} 

public void showTextInfo(int textID){ 
    this.textID = textID; 
    setText(textID); 
    Intent intent = new Intent(context, ShowTextActivity.class); 
    Bundle bundle = new Bundle(); 
    bundle.putSerializable("logic", this); 
    intent.putExtras(bundle); 
    intent.putExtra("Writer",getWriter()); 
    intent.putExtra("Resume", getInfo()); 
    intent.putExtra("Title", getName()); 
    context.startActivity(intent); 
} 

public void beginTest(int id){ 
    setText(id); 
    ShowTextActivity showText = new ShowTextActivity(); 
    showText.setText(getText()); 
    Intent intent = new Intent(context, showText.getClass()); 
    Bundle bundle = new Bundle(); 
    bundle.putSerializable("logic", this); 
    intent.putExtras(bundle); 
    context.startActivity(intent); 
    startTime = System.currentTimeMillis(); 
} 

public void getResult(){ 
    int xp = calculateXP(); 
    String result = "Antal korrekte svar: " + correct + "\n" + 
      "Du læste teksten på " + totalTime/1000%60 + "sekunder" + "\n" + 
      "Du får " + xp + " xp"; 
    user.addXp(xp); 
    TestResultActivity testResultActivity = new TestResultActivity(); 
    testResultActivity.setInfo(result); 
    Intent intent = new Intent(context, testResultActivity.getClass()); 
    Bundle bundle = new Bundle(); 
    bundle.putSerializable("logic", this); 
    intent.putExtras(bundle); 
    context.startActivity(intent); 
} 

public void setText(int id){ 
    readingTest.setTextID(id); 
} 

private String getText(){ 
    return readingTest.getText(); 
} 

private String getName(){ return readingTest.getName(); } 

private String getWriter(){ return readingTest.getWriter(); } 

private String getInfo(){ return readingTest.getInfo(); } 

public void getQuestion1() { 
    quizActivity.firstQuestion(readingTest.getQuestion1()); 
    Intent intent = new Intent(context, quizActivity.getClass()); 
    Bundle bundle = new Bundle(); 
    bundle.putSerializable("logic", this); 
    intent.putExtras(bundle); 
    context.startActivity(intent); 
} 

public void getQuestion2() { 
    quizActivity.secondQuestion(readingTest.getQuestion2()); 
} 

public void getQuestion3() { 
    quizActivity.thirdQuestion(readingTest.getQuestion3()); 
} 


public void beginPause(){ 
    startPause = System.currentTimeMillis(); 
} 

public void stopPause(){ 
    stopPause = System.currentTimeMillis(); 
    pauses.add(stopPause-startPause); 
} 

public void stopTimer(){ 
    stopTime = System.currentTimeMillis(); 
    totalTime = stopTime-startTime; 
    for (int i = 0; i< pauses.size(); i++){ 
     totalTime = totalTime- pauses.get(i); 
    } 
} 

private int calculateXP(){ 
    long seconds = totalTime/1000%60; 
    int readingspeed = readingTest.getWordCount()/standardReadingSpeed; 
    int xp = (readingTest.getLix()*correct)+readingspeed-(int) seconds+50; 
    if(xp <= 10){return 10;} 
    else {return xp;} 
} 

public void checkAnswer(int question, int answer){ 
    int correctAnswer = readingTest.getCorrectAnswer(question); 
    if(answer == correctAnswer){ 
     correct++; 
    } 

} 

public int getTextID(){ 
    return textID; 
} 
}

而且有TestLogic和CreateUserActivity之間沒有參考。

我如何得到它的工作？

來源

2016-11-24 Cecilie Lindberg

可能的問題是TestLogic類（ReadingTest，User，QuizActivity）的一個或多個成員或其中一個類的成員之一是不可序列化的。

在整個對象圖中，您的所有對象都必須是可序列化的才能工作。

另外，請注意，雖然可以將Serializable對象放入包中，但不推薦。每當您創建自己的類以用於Android應用程序時，您應該實現Parcelable而不是Serializable

來源

2016-11-24 23:04:02 GreyBeardedGeek

P.S. - TestLogic具有Context類型的成員。我可能會誤解，但我不認爲Context是Parcelable或Serializable，並且這不是我認爲可以合理存儲和重構的內容。噢，通過它的名字，我猜測QuizActivity是一個活動。這也不起作用，出於與上下文相同的原因（活動是上下文）。 – GreyBeardedGeek

我在Context上使用了transient，但是我得到的錯誤是在CreateUserActivity中，而不是在TestLogic中 –

回答

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