使用意圖在Activity之間傳遞數據小插曲__傳遞自定義的序列化對象

 自定義序列化類 

public class Contacts implements Parcelable {
    public static final String PARCELABLE_KEY = "aliusa.cn.ui.Contacts.parcelableKey";
    private int id;
    private String name;

    public Contacts(int id,String name){
        this.name = name;
        this.id = id;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }


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

   //實現Parcelable的方法writeToParcel，將Contacts序列化爲一個Parcel對象
    @Override
    public void writeToParcel(Parcel dest, int flags) {

        dest.writeInt(id);
        dest.writeString(name);
    }

    //實例化靜態內部對象CREATOR實現接口Parcelable.Creator
    public static final Parcelable.Creator<Contacts> CREATOR = new Parcelable.Creator<Contacts>() {
//將Parcel對象反序列化爲Contacts
        public Contacts createFromParcel(Parcel in) {
            return new Contacts(in);
        }

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

    //關鍵的事
    private Contacts(Parcel in) {
        id = in.readInt();
        name = in.readString();
    }
}

傳遞參數
         Contacts contact = new Contacts("0001", "aliusa");
        Bundle bundle = new Bundle();
        bundle.putParcelable(Contacts.PARCELABLE_KEY , contact);
        intent.putExtra(parcelableKey, contact);

讀取參數

final Contacts contact = (Contacts) getIntent().getExtras().getParcelable(Contacts.PARCELABLE_KEY);