android頁面間傳遞對象，android頁面傳遞

android頁面間傳遞對象，android頁面傳遞

android傳遞對象有兩種方式:

一種是Serializable和Parcelable

對於第一種方式:

import java.io.Serializable;


public class ShopData implements Serializable {
public String shopId;
public String name;
public String url;
public String info;


public String getShopId() {
return shopId;
}


public void setShopId(String shopId) {
this.shopId = shopId;
}


public String getName() {
return name;
}


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


public String getUrl() {
return url;
}


public void setUrl(String url) {
this.url = url;
}


public String getInfo() {
return info;
}


public void setInfo(String info) {
this.info = info;
}


}

傳遞值的時候這樣來傳遞:

<span style="white-space:pre"></span>Intent intent = new Intent();ShopData shopData = (ShopData)mAdapter.getItem(position);//intent.putExtra("detail", shopData);Bundle bundle = new Bundle();bundle.putSerializable("shop", shopData);intent.putExtra("detail", shopData);intent.setClass(MainActivity.this, DetailShopActivity.class);MainActivity.this.startActivity(intent);

取值的時候:

<span style="white-space:pre"></span>Intent intent = getIntent();//ShopData data = intent.getParcelableExtra("detail");ShopData data = (ShopData)intent.getSerializableExtra("detail");

對於第二種方式:

import android.os.Parcel;import android.os.Parcelable;public class ShopData implements Parcelable{public String shopId;public String name;public String url;public String info;public ShopData(Parcel in) {readFromParcel(in);}public ShopData() {}public static final Parcelable.Creator<ShopData> CREATOR = new Parcelable.Creator<ShopData>() {public ShopData createFromParcel( Parcel in ){return new ShopData(in);}public ShopData[] newArray( int size){return new ShopData[size];}};@Overridepublic int describeContents() {return 0;}@Overridepublic void writeToParcel(Parcel dest, int flags) {dest.writeString(shopId);dest.writeString(name);dest.writeString(url);dest.writeString(info);}public void readFromParcel( Parcel in ){shopId = in.readString();name = in.readString();url = in.readString();info = in.readString();}}

傳遞的時候這樣寫:

<span style="white-space:pre"></span>Intent intent = new Intent();ShopData shopData = (ShopData)mAdapter.getItem(position);intent.putExtra("detail", shopData);intent.putExtra("detail", shopData);intent.setClass(MainActivity.this, DetailShopActivity.class);MainActivity.this.startActivity(intent);

取值的時候:

<span style="white-space:pre"></span>Intent intent = getIntent();ShopData data = intent.getParcelableExtra("detail");

Android 中傳遞對象的集合

Intent intent = ....;//intent定義
ArrayList<User> list = .....;//list賦值
intent.putExtra("userList", list.toArray());
startActivity(intent);
前提是list中的User必須implements Serializable

接收時：
Intent intent = this.getIntent();
Object[] cobjs = (Object[]) intent.getSerializableExtra("userList");
for (int i = 0; i < cobjs.length; i++) {
User user = (User) cobjs[i];
userList.add(user);
}
參考資料：www.qingzhui.com/blog_article.php?id=7
 
android 用Intent傳遞對象的問題

putSerializable,是通過對象的序列化和還原序列化來實現Activity之間對象的傳遞的,所以這種方法得到的就是兩個完全不一樣的對象(Activity2中的對象obj就相當於new了一個新對象,然後將Activity1中的對象obj的值都賦給了它,所以可以說它們的內容是一樣的,但是對象不一樣.).
注:通過上述方法傳遞的對象obj一定要實現Serializable介面才可以哦!

一般在Activity之間是不做對象的傳遞的吧,序列化和還原序列化本身就沒有一定的弊端吧(個人感覺),呵呵...而且對象都要實現Serializable介面.

如果一定要傳對象的話可以在做一些靜態類或對象!

希望對你有協助 ^_^!