当片段启动另一个片段时，onSaveInstanceState上的异常
当片段启动另一个片段时，onSaveInstanceState上的异常
提问于 2017-08-24 13:24:13
专家们，
我正在努力解决以下问题:我有一个启动片段A的活动，当单击按钮时，片段A启动片段B。片段B有一个ListView和一个定制的BaseAdapter来包装它。
当我在显示片段B时将应用程序放置在后台时，我会在onSaveInstanceState()上的片段A中得到下面的异常。
任何帮助都非常感谢！谢谢!
// BaseActivity addFragment()
public void addFragment(@IdRes int id, Fragment fragment) {
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(id, fragment, fragment.toString());
fragmentTransaction.addToBackStack(fragment.toString());
fragmentTransaction.commit();
}
// Start Fragment A
BaseActivity activity = (BaseActivity) getActivity();
activity.addFragment(R.id.container, new FragmentAFragment());
// In FragmentAFragment: Show Fragment B
BaseActivity activity = (BaseActivity) getActivity();
activity.addFragment(R.id.container, FragmentBFragment.newInstance(getString(R.string.input_list), selectedListItem, new FragmentAFragment.ListSelectorListener() {
@Override
public void onSelected(final String selected) {
// handle selection
}
}));FATAL EXCEPTION: main
android.support.v4.app.FragmentState.writeToParcel(Fragment.java:148)
at android.os.Parcel.writeTypedArray(Parcel.java:1306)
at android.support.v4.app.FragmentManagerState.writeToParcel(FragmentManager.java:564)
at android.os.Parcel.writeParcelable(Parcel.java:1495)
at android.os.Parcel.writeValue(Parcel.java:1401)
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.app.ActivityManagerProxy.activityStopped(ActivityManagerNative.java:3603)
at android.app.ActivityThread$StopInfo.run(ActivityThread.java:3744)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
Caused by: java.io.NotSerializableException: com.company.myapp.FragmentA$1
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1224)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1584)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1549)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1472)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1218)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:346)
at android.os.Parcel.writeSerializable(Parcel.java:1521)
at android.os.Parcel.writeValue(Parcel.java:1474)
at android.os.Parcel.writeArrayMapInternal(Parcel.java:723)
at android.os.BaseBundle.writeToParcelInner(BaseBundle.java:1408)
at android.os.Bundle.writeToParcel(Bundle.java:1133)
at android.os.Parcel.writeBundle(Parcel.java:763)
at android.support.v4.app.FragmentState.writeToParcel(Fragment.java:148)
at android.os.Parcel.writeTypedArray(Parcel.java:1306)
at android.support.v4.app.FragmentManagerState.writeToParcel(FragmentManager.java:564)
at android.os.Parcel.writeParcelable(Parcel.java:1495)
at android.os.Parcel.writeValue(Parcel.java:1401)
at android.os.Parcel.writeArrayMapInternal(Parcel.java:723)
at android.os.BaseBundle.writeToParcelInner(BaseBundle.java:1408)
at android.os.Bundle.writeToParcel(Bundle.java:1133)
at android.os.Parcel.writeBundle(Parcel.java:763)
at android.app.ActivityManagerProxy.activityStopped(ActivityManagerNative.java:3603)
at android.app.ActivityThread$StopInfo.run(ActivityThread.java:3744)
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) Stack Overflow用户
发布于 2017-08-24 14:58:35
我认为我的问题是片段A中的侦听器内部类不是可解析的或可序列化的。我将侦听器定义为瞬态变量，从而防止了异常。
private transient FragmentAFragment.ListSelectorListener listener = new FragmentAFragment.ListSelectorListener() {
@Override
public void onSelected(final String selected) {
}
};
// then use the listener to start Fragment B
BaseActivity activity = (BaseActivity) getActivity();
activity.addFragment(R.id.container, FragmentBFragment.newInstance(getString(R.string.input_list), selectedListItem, listener));页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/45862858
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