我想创建A类Parcelable类。如何使用嵌套对象创建类Parcelable
public class A {
public String str;
public ArrayList<B> list;
}
这是我想出这么远。但是它会因NullPointerException而崩溃。问题是这两个陈述:dest.writeList(list);
& in.readList(list, this.getClass().getClassLoader());
。 我想不出什么从这里做:(
A类
public class A implements Parcelable {
public String str;
public ArrayList<B> list;
@Override
public int describeContents() {
// TODO Auto-generated method stub
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(str);
dest.writeList(list);
}
private A(Parcel in) {
str = in.readString();
in.readList(list, this.getClass().getClassLoader());
}
public static final Parcelable.Creator<A> CREATOR
= new Parcelable.Creator<A>() {
public A createFromParcel(Parcel in) {
return new A(in);
}
public A[] newArray(int size) {
return new A[size];
}
};
}
B类
public class B implements Parcelable {
public String str;
@Override
public int describeContents() {
// TODO Auto-generated method stub
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(str);
}
private B(Parcel in) {
str = in.readString();
}
public static final Parcelable.Creator<B> CREATOR
= new Parcelable.Creator<B>() {
public B createFromParcel(Parcel in) {
return new B(in);
}
public B[] newArray(int size) {
return new B[size];
}
};
}
谢谢您的时间。
标记你回答所接受! –
啊,是的,它不会让我,然后我有点忘了它:) –
@Snæbjørn感谢分享解决方案 –