我无法将带有捆绑的ArrayList从一个片段放到另一个片段中

Question

我想在另一个片段中使用具有我自己的数据类型的ArrayList，我用捆绑包对其进行测试，然后使用putParcelableArrayList方法放置列表，但是它不起作用。

为什么有任何想法，还是更好的建议？

片段1：

Bundle arguments = new Bundle();

arguments.putParcelableArrayList("BESTAND", (ArrayList<Bestand>) palBestand);

片段2：

ArrayList<Bestand> bestandsliste = (ArrayList<Bestand>) getArguments().getParcelableArrayList("BESTAND");

Answer 1

这是Parcelable类的示例

public class Student implements Parcelable{
        private String id;
        private String name;
        private String grade;

        // Constructor
        public Student(String id, String name, String grade){
            this.id = id;
            this.name = name;
            this.grade = grade;
       }
       // Getter and setter methods
       .........
       .........

       // Parcelling part
       public Student(Parcel in){
           String[] data = new String[3];

           in.readStringArray(data);
           // the order needs to be the same as in writeToParcel() method
           this.id = data[0];
           this.name = data[1];
           this.grade = data[2];
       }

       @Оverride
       public int describeContents(){
           return 0;
       }

       @Override
       public void writeToParcel(Parcel dest, int flags) {
           dest.writeStringArray(new String[] {this.id,
                                               this.name,
                                               this.grade});
       }
       public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {
           public Student createFromParcel(Parcel in) {
               return new Student(in); 
           }

           public Student[] newArray(int size) {
               return new Student[size];
           }
       };
   }