将一个活动传递给另一个活动的对象（其中包含数组列表表达式）

Question

嗨，朋友我将一个活动传递给另一个活动的对象（其中包含数组列表） 我可以在活动 中通过intent传递对象，但是当我我在最后的异常细节中有异常提到，这里是我的代码，通过谷歌搜索我读到这个，这是arraylist的问题，我通过 ，但我将如何通过....

例子在网上给出，我们只能通过数组列表或paas对象，但我的问题是我想在单个对象，一个数组列表和其他几个变量传递，目前我只使用单个可变的，但它可能是更......

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

public class Common_info implements Serializable{ 


private static final long serialVersionUID = 1L; 



private int numberOfFormats; 
private ArrayList<Object> listOfFormats; 



public int getNumberOfFormats() { 
    return numberOfFormats; 
} 
public void setNumberOfFormats(int numberOfFormats) { 
    this.numberOfFormats = numberOfFormats; 
} 
public ArrayList<Object> getListOfFormats() { 
    return listOfFormats; 
} 
public void setListOfFormats(ArrayList<Object> listOfFormats) { 
    this.listOfFormats = listOfFormats; 
} 


} 

这就是我如何打电话

 Class<?> setClass;    
     Object obj_set_class; 

     setClass = Class.forName(str_set_class_name_with_full_path);    
     obj_set_class = setClass.newInstance(); 



     Object obj_arr_parameters[] = {mode,set_code}; 
     Class<?> class_arr_Parameters_type[] = new Class[obj_arr_parameters.length]; 

      for (int i = 0; i < obj_arr_parameters.length; i++) { 
       if (obj_arr_parameters[i] instanceof Integer) { 

        class_arr_Parameters_type[i] = Integer.TYPE; 

       } else if (obj_arr_parameters[i] instanceof String) { 

        class_arr_Parameters_type[i] = String.class; 

       }/*else if (obj_arr_parameters[i] instanceof EditText) { 

        class_arr_Parameters_type[i] = EditText.class; 
       }*/ 

      } 
     Method thisMethod = setClass.getDeclaredMethod("getTestInfo", class_arr_Parameters_type); 
     Common_info obj_Common_info = (Common_info) thisMethod.invoke(obj_set_class, obj_arr_parameters); 

     System.out.println("number of uis " +obj_Common_info.getNumberOfFormats()); 

     Intent intent = new Intent(this,ActStartTest2.class); 
     intent.putExtra("student_id", student_id); 
     intent.putExtra("student_name", student_name); 
     intent.putExtra("set_code", set_code); 
     intent.putExtra("set_common_info", obj_Common_info); 
     //intent.putExtra("mode", CConstants.PRACTICE_MODE); 
     startActivity(intent); 

异常详细信息

09-05 08:15:56.308: W/System.err(7893): java.lang.RuntimeException: Parcelable encountered IOException writing serializable object (name = com.cuelearn.cuemath_k8.beans.Common_info) 
09-05 08:15:56.318: W/System.err(7893):  at android.os.Parcel.writeSerializable(Parcel.java:1316) 
09-05 08:15:56.318: W/System.err(7893):  at android.os.Parcel.writeValue(Parcel.java:1264) 
09-05 08:15:56.318: W/System.err(7893):  at android.os.Parcel.writeArrayMapInternal(Parcel.java:618) 
09-05 08:15:56.318: W/System.err(7893):  at android.os.Bundle.writeToParcel(Bundle.java:1692) 
09-05 08:15:56.328: W/System.err(7893):  at android.os.Parcel.writeBundle(Parcel.java:636) 
09-05 08:15:56.328: W/System.err(7893):  at android.content.Intent.writeToParcel(Intent.java:7013) 
09-05 08:15:56.328: W/System.err(7893):  at android.app.ActivityManagerProxy.startActivity(ActivityManagerNative.java:2076) 
09-05 08:15:56.328: W/System.err(7893):  at android.app.Instrumentation.execStartActivity(Instrumentation.java:1419) 
09-05 08:15:56.328: W/System.err(7893):  at android.app.Activity.startActivityForResult(Activity.java:3424) 
09-05 08:15:56.328: W/System.err(7893):  at android.app.Activity.startActivityForResult(Activity.java:3385) 
09-05 08:15:56.328: W/System.err(7893):  at android.app.Activity.startActivity(Activity.java:3627) 
09-05 08:15:56.328: W/System.err(7893):  at android.app.Activity.startActivity(Activity.java:3595) 
09-05 08:15:56.328: W/System.err(7893):  at com.cuelearn.cuemath_k8.act.ActHomeScreen.startTest(ActHomeScreen.java:212) 
09-05 08:15:56.338: W/System.err(7893):  at com.cuelearn.cuemath_k8.act.ActHomeScreen.onSelectedConcept(ActHomeScreen.java:140) 
09-05 08:15:56.338: W/System.err(7893):  at com.cuelearn.cuemath_k8.ui_files.frag_general.FragConceptsList.onClick(FragConceptsList.java:76) 
09-05 08:15:56.338: W/System.err(7893):  at android.view.View.performClick(View.java:4438) 
09-05 08:15:56.338: W/System.err(7893):  at android.view.View$PerformClick.run(View.java:18422) 
09-05 08:15:56.338: W/System.err(7893):  at android.os.Handler.handleCallback(Handler.java:733) 
09-05 08:15:56.338: W/System.err(7893):  at android.os.Handler.dispatchMessage(Handler.java:95) 
09-05 08:15:56.338: W/System.err(7893):  at android.os.Looper.loop(Looper.java:136) 
09-05 08:15:56.338: W/System.err(7893):  at android.app.ActivityThread.main(ActivityThread.java:5017) 
09-05 08:15:56.358: W/System.err(7893):  at java.lang.reflect.Method.invokeNative(Native Method) 
09-05 08:15:56.358: W/System.err(7893):  at java.lang.reflect.Method.invoke(Method.java:515) 
09-05 08:15:56.368: W/System.err(7893):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
09-05 08:15:56.368: W/System.err(7893):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
09-05 08:15:56.368: W/System.err(7893):  at dalvik.system.NativeStart.main(Native Method) 
09-05 08:15:56.378: W/System.err(7893): Caused by: java.io.NotSerializableException: com.cuelearn.cuemath_k8.ui_files.frag_questions.Frag_Ui_Type_1 
09-05 08:15:56.378: W/System.err(7893):  at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1364) 
09-05 08:15:56.378: W/System.err(7893):  at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1671) 
09-05 08:15:56.378: W/System.err(7893):  at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517) 
09-05 08:15:56.378: W/System.err(7893):  at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481) 
09-05 08:15:56.378: W/System.err(7893):  at java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:979) 
09-05 08:15:56.378: W/System.err(7893):  at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:368) 
09-05 08:15:56.378: W/System.err(7893):  at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1074) 
09-05 08:15:56.378: W/System.err(7893):  at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1404) 
09-05 08:15:56.378: W/System.err(7893):  at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1671) 
09-05 08:15:56.378: W/System.err(7893):  at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517) 
09-05 08:15:56.398: W/System.err(7893):  at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481) 
09-05 08:15:56.398: W/System.err(7893):  at java.util.ArrayList.writeObject(ArrayList.java:648) 
09-05 08:15:56.398: W/System.err(7893):  at java.lang.reflect.Method.invokeNative(Native Method) 
09-05 08:15:56.398: W/System.err(7893):  at java.lang.reflect.Method.invoke(Method.java:515) 
09-05 08:15:56.398: W/System.err(7893):  at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1053) 
09-05 08:15:56.408: W/System.err(7893):  at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1404) 
09-05 08:15:56.408: W/System.err(7893):  at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1671) 
09-05 08:15:56.408: W/System.err(7893):  at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517) 
09-05 08:15:56.408: W/System.err(7893):  at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481) 
09-05 08:15:56.408: W/System.err(7893):  at java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:979) 
09-05 08:15:56.408: W/System.err(7893):  at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:368) 
09-05 08:15:56.408: W/System.err(7893):  at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1074) 
09-05 08:15:56.408: W/System.err(7893):  at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1404) 
09-05 08:15:56.408: W/System.err(7893):  at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1671) 
09-05 08:15:56.408: W/System.err(7893):  at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517) 
09-05 08:15:56.418: W/System.err(7893):  at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481) 
09-05 08:15:56.418: W/System.err(7893):  at android.os.Parcel.writeSerializable(Parcel.java:1311) 
09-05 08:15:56.418: W/System.err(7893):  ... 25 more 

Answer 1

Intent intent=new Intent(this,ActStartTest2.class); 
intent.putExtra("student_id", student_id); 
intent.putExtra("student_name", student_name); 
intent.putExtra("set_code", set_code); 
intent.putExtra("set_common_info", obj_Common_info); 
startActivity(intent); 

在课堂ActStartTest2试试这个

部分

Intent i = getIntent(); 
Common_info com_Info = (Common_info)i.getSerializableExtra("set_common_info"); 

Answer 2

堆栈跟踪提到java.io.NotSerializableException: com.cuelearn.cuemath_k8.ui_files.frag_questions.Frag_Ui_Type_1 - 这意味着你正在引用这个（不可序列化的）类在你试图把你的包裹（可能obj_common_info，但我不确定）的对象的层次结构下。

就像一个侧面说明 - 在Android中，建议使用Parcel而不是Serializable类。诚然，它可能需要更多的编码，但据说速度更快。检查this。