我有MyClass实现Parcelable。并有2个片段。在MainActivity(onCreate)中,我有代码:
ArrayList<MyClass> data = new ArrayList<MyClass>();
............
Bundle extras1 = new Bundle();
extras1.putParcelableArrayList("arraylist", data);
Tab1Fragment fg = new Tab1Fragment();
fg.setArguments(extras1);
在Fragment(onCreateView)中:
Bundle extras = getArguments();
ListView list = (ListView) content.findViewById(R.id.lvMain);
if (extras != null) {
data = extras.getParcelableArrayList("arraylist");
list.setAdapter(new MyAdapter(getActivity(), data));
}
但是额外的东西总是空的。为什么?:)
答案 0 :(得分:3)
您提供的代码似乎没问题。我怀疑问题来自你如何实现MyClass。 Parcelable的典型实现是这样的(取自谷歌)
public class MyParcelable implements Parcelable {
private int mData;
public int describeContents() {
return 0;
}
public void writeToParcel(Parcel out, int flags) {
out.writeInt(mData);
}
public static final Parcelable.Creator<MyParcelable> CREATOR
= new Parcelable.Creator<MyParcelable>() {
public MyParcelable createFromParcel(Parcel in) {
return new MyParcelable(in);
}
public MyParcelable[] newArray(int size) {
return new MyParcelable[size];
}
};
private MyParcelable(Parcel in) {
mData = in.readInt();
}