[英]Class cast Exception while sending object to another activity
我尝试使用Intent
发送一个对象。
我有三个班级,班级A有班级B的列表,班级B有班级C的列表,我想用Parcelable
将班级A从一个活动发送到另一个活动。 我尝试以下代码:
在A类中:
private List<DocumentItem> documentItems;
private int DocNum ;
public CycleAccount(Parcel in) {
DocNum = in.readInt();
documentItems = new ArrayList<DocumentItem>();
in.readList(documentItems , null);
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(DocNum);
dest.writeList(documentItems);
}
public CycleAccount(Parcel in) {
DocNum = in.readInt();
documentItems = new ArrayList<DocumentItem>();
in.readList(documentItems , null);
}
在B类中:
private String LedgerAcountId;
private String Title;
private String Debit;
private String Credit;
private String Description;
private List<DetailsAccount> DetailAccount;
public DocumentItem(Parcel in) {
LedgerAcountId = in.readString();
Title = in.readString();
Debit = in.readString();
Credit = in.readString();
Description = in.readString();
DetailAccount = new ArrayList<DetailsAccount>();
in.readList(DetailAccount, null);
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(LedgerAcountId);
dest.writeString(Title);
dest.writeString(Debit);
dest.writeString(Credit);
dest.writeString(Description);
dest.writeList(DetailAccount);
}
并在c类中:
private String Title;
private String Level;
private String detailAccountId;
DetailsAccount(Parcel in)
{
Title = in.readString();
Level = in.readString();
detailAccountId = in.readString();
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(Title);
dest.writeString(Level);
dest.writeString(detailAccountId);
}
对于发送和获取数据,我使用以下代码:
发送:
Intent intent = new Intent(AccountReviewActivity.this, CycleAccountAccountReview.class);
Bundle bundle = new Bundle();
bundle.putParcelable("data", CycleItems);
intent.putExtra("data",bundle);
startActivity(intent);
获得:
cycleItem = new CycleAccount();
Bundle bundle = getIntent().getExtras();
cycleItem = bundle.getParcelable("data");
我得到以下错误:
12-22 10:13:57.320: E/AndroidRuntime(3702): FATAL EXCEPTION: main
12-22 10:13:57.320: E/AndroidRuntime(3702): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.proj.finantial/activity.CycleAccountAccountReview}: java.lang.ClassCastException: android.os.Bundle cannot be cast to classes.CycleAccount
12-22 10:13:57.320: E/AndroidRuntime(3702): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
12-22 10:13:57.320: E/AndroidRuntime(3702): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
12-22 10:13:57.320: E/AndroidRuntime(3702): at android.app.ActivityThread.access$600(ActivityThread.java:141)
12-22 10:13:57.320: E/AndroidRuntime(3702): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
12-22 10:13:57.320: E/AndroidRuntime(3702): at android.os.Handler.dispatchMessage(Handler.java:99)
12-22 10:13:57.320: E/AndroidRuntime(3702): at android.os.Looper.loop(Looper.java:137)
12-22 10:13:57.320: E/AndroidRuntime(3702): at android.app.ActivityThread.main(ActivityThread.java:5041)
12-22 10:13:57.320: E/AndroidRuntime(3702): at java.lang.reflect.Method.invokeNative(Native Method)
12-22 10:13:57.320: E/AndroidRuntime(3702): at java.lang.reflect.Method.invoke(Method.java:511)
12-22 10:13:57.320: E/AndroidRuntime(3702): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
12-22 10:13:57.320: E/AndroidRuntime(3702): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
12-22 10:13:57.320: E/AndroidRuntime(3702): at dalvik.system.NativeStart.main(Native Method)
12-22 10:13:57.320: E/AndroidRuntime(3702): Caused by: java.lang.ClassCastException: android.os.Bundle cannot be cast to classes.CycleAccount
12-22 10:13:57.320: E/AndroidRuntime(3702): at activity.CycleAccountAccountReview.onCreate(CycleAccountAccountReview.java:77)
12-22 10:13:57.320: E/AndroidRuntime(3702): at android.app.Activity.performCreate(Activity.java:5104)
12-22 10:13:57.320: E/AndroidRuntime(3702): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
12-22 10:13:57.320: E/AndroidRuntime(3702): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
12-22 10:13:57.320: E/AndroidRuntime(3702): ... 11 more
有任何想法吗?
编辑
CycleItems = new CycleAccount();
documentItemResponse = JsonAcountReview.getAccountItem(params[0] ,params[1],params[2],params[3],params[4],params[5]);
CycleItems = JsonAcountReview.AccountItem(documentItemResponse);
我从Json
那里得到数据
尝试这个...
Intent intent = new Intent(AccountReviewActivity.this, CycleAccountAccountReview.class);
intent.putExtra("data",cycleItems);
startActivity(intent);
和收到的活动
CycleAccount cycleItem = getIntent().getParcelableExtra("data");
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