在活动之间传递对象的数组列表 [英] Passing arraylist of objects between activities
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问题描述
我试图在两个活动之间传递一个对象数组列表,但我的应用程序在第二个活动中崩溃了.有人能帮我解决这个问题吗...
I am trying to pass an arraylist of objects between two activities, but my app crushes at the second activity. Can someone help me solve this problem...
这是我第一个活动的代码:
Here is my code from my first activity:
Intent i = new Intent();
Bundle b = new Bundle();
b.putParcelableArrayList("songs",(ArrayList<? extends Parcelable>) albumsArray.get(position).getSongs());
Log.v("--", "OK");
i.putExtras(b);
i.setClass(LatestAlbums.this, AlbumDetails.class);
startActivity(i);
以及来自第二个活动的代码:
And code from the second activity:
songs=new ArrayList<Songs>();
Bundle b = this.getIntent().getExtras();
if(b!=null)
songs = b.getParcelable("songs");
Log.v("--", songs.size()+"");
还有我的 logcat 输出:
And my logcat output:
04-03 16:37:03.513: E/AndroidRuntime(6576): FATAL EXCEPTION: main
04-03 16:37:03.513: E/AndroidRuntime(6576): java.lang.RuntimeException: Parcel: unable to marshal value com.musicapp.objects.Songs@419489e8
04-03 16:37:03.513: E/AndroidRuntime(6576): at android.os.Parcel.writeValue(Parcel.java:1137)
04-03 16:37:03.513: E/AndroidRuntime(6576): at android.os.Parcel.writeList(Parcel.java:524)
04-03 16:37:03.513: E/AndroidRuntime(6576): at android.os.Parcel.writeValue(Parcel.java:1097)
04-03 16:37:03.513: E/AndroidRuntime(6576): at android.os.Parcel.writeMapInternal(Parcel.java:493)
04-03 16:37:03.513: E/AndroidRuntime(6576): at android.os.Bundle.writeToParcel(Bundle.java:1612)
04-03 16:37:03.513: E/AndroidRuntime(6576): at android.os.Parcel.writeBundle(Parcel.java:507)
04-03 16:37:03.513: E/AndroidRuntime(6576): at android.content.Intent.writeToParcel(Intent.java:6147)
04-03 16:37:03.513: E/AndroidRuntime(6576): at android.app.ActivityManagerProxy.startActivity(ActivityManagerNative.java:1613)
04-03 16:37:03.513: E/AndroidRuntime(6576): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1379)
04-03 16:37:03.513: E/AndroidRuntime(6576): at android.app.Activity.startActivityFromChild(Activity.java:3458)
04-03 16:37:03.513: E/AndroidRuntime(6576): at android.app.Activity.startActivityForResult(Activity.java:3210)
04-03 16:37:03.513: E/AndroidRuntime(6576): at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:817)
04-03 16:37:03.513: E/AndroidRuntime(6576): at android.app.Activity.startActivity(Activity.java:3297)
04-03 16:37:03.513: E/AndroidRuntime(6576): at com.outsourcefarm.musicagratis.activities.LatestAlbums$4$1.onItemClick(LatestAlbums.java:232)
04-03 16:37:03.513: E/AndroidRuntime(6576): at android.widget.AdapterView.performItemClick(AdapterView.java:292)
04-03 16:37:03.513: E/AndroidRuntime(6576): at android.widget.AbsListView.performItemClick(AbsListView.java:1058)
04-03 16:37:03.513: E/AndroidRuntime(6576): at android.widget.AbsListView$PerformClick.run(AbsListView.java:2514)
04-03 16:37:03.513: E/AndroidRuntime(6576): at android.widget.AbsListView$1.run(AbsListView.java:3168)
04-03 16:37:03.513: E/AndroidRuntime(6576): at android.os.Handler.handleCallback(Handler.java:605)
04-03 16:37:03.513: E/AndroidRuntime(6576): at android.os.Handler.dispatchMessage(Handler.java:92)
04-03 16:37:03.513: E/AndroidRuntime(6576): at android.os.Looper.loop(Looper.java:137)
04-03 16:37:03.513: E/AndroidRuntime(6576): at android.app.ActivityThread.main(ActivityThread.java:4440)
04-03 16:37:03.513: E/AndroidRuntime(6576): at java.lang.reflect.Method.invokeNative(Native Method)
04-03 16:37:03.513: E/AndroidRuntime(6576): at java.lang.reflect.Method.invoke(Method.java:511)
04-03 16:37:03.513: E/AndroidRuntime(6576): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:787)
04-03 16:37:03.513: E/AndroidRuntime(6576): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:554)
04-03 16:37:03.513: E/AndroidRuntime(6576): at dalvik.system.NativeStart.main(Native Method)
推荐答案
你应该让你的 Song
类实现 Parcelable
.
You should make your Song
class implement Parcelable
.
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