在android中将对象列表从一个activity传递给其他activity
在android中将对象列表从一个activity传递给其他activity
提问于 2012-08-23 21:24:07
我想从一个活动传递另一个活动的对象列表。我在下面有一个类SharedBooking：
public class SharedBooking {
public int account_id;
public Double betrag;
public Double betrag_effected;
public int taxType;
public int tax;
public String postingText;
}来自调用活动的代码：
public List<SharedBooking> SharedBookingList = new ArrayList<SharedBooking>();
public void goDivision(Context context, Double betrag, List<SharedBooking> bookingList) {
final Intent intent = new Intent(context, Division.class);
intent.putExtra(Constants.BETRAG, betrag);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
context.startActivity(intent);
}已调用活动的COde：
Bundle extras = getIntent().getExtras();
if (extras != null) {
amount = extras.getDouble(Constants.BETRAG,0);
}如何从一个活动发送SharedBooking列表并在其他活动上接收该列表？
请建议我任何有用的链接或示例代码。
回答 9
Stack Overflow用户
回答已采纳
发布于 2012-08-23 21:39:13
使用parcelable。下面是你将如何做的：
public class SharedBooking implements Parcelable{
public int account_id;
public Double betrag;
public Double betrag_effected;
public int taxType;
public int tax;
public String postingText;
public SharedBooking() {
account_id = 0;
betrag = 0.0;
betrag_effected = 0.0;
taxType = 0;
tax = 0;
postingText = "";
}
public SharedBooking(Parcel in) {
account_id = in.readInt();
betrag = in.readDouble();
betrag_effected = in.readDouble();
taxType = in.readInt();
tax = in.readInt();
postingText = in.readString();
}
public int getAccount_id() {
return account_id;
}
public void setAccount_id(int account_id) {
this.account_id = account_id;
}
public Double getBetrag() {
return betrag;
}
public void setBetrag(Double betrag) {
this.betrag = betrag;
}
public Double getBetrag_effected() {
return betrag_effected;
}
public void setBetrag_effected(Double betrag_effected) {
this.betrag_effected = betrag_effected;
}
public int getTaxType() {
return taxType;
}
public void setTaxType(int taxType) {
this.taxType = taxType;
}
public int getTax() {
return tax;
}
public void setTax(int tax) {
this.tax = tax;
}
public String getPostingText() {
return postingText;
}
public void setPostingText(String postingText) {
this.postingText = postingText;
}
public int describeContents() {
// TODO Auto-generated method stub
return 0;
}
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(account_id);
dest.writeDouble(betrag);
dest.writeDouble(betrag_effected);
dest.writeInt(taxType);
dest.writeInt(tax);
dest.writeString(postingText);
}
public static final Parcelable.Creator<SharedBooking> CREATOR = new Parcelable.Creator<SharedBooking>()
{
public SharedBooking createFromParcel(Parcel in)
{
return new SharedBooking(in);
}
public SharedBooking[] newArray(int size)
{
return new SharedBooking[size];
}
};
}传递数据的：
Intent intent = new Intent(getApplicationContext(),YourActivity.class);
Bundle bundle = new Bundle();
bundle.putParcelable("data", sharedBookingObject);
intent.putExtras(bundle);
startActivity(intent);检索数据的：
Bundle bundle = getIntent().getExtras();
sharedBookingObject = bundle.getParcelable("data");Stack Overflow用户
发布于 2015-08-13 01:53:37
首先，让列表的类实现可序列化的。
public class MyObject implements Serializable{}然后你可以将列表转换为(Serializable)。如下所示：
List<MyObject> list = new ArrayList<>();
myIntent.putExtra("LIST", (Serializable) list);要检索列表，请执行以下操作：
Intent i = getIntent();
list = (List<MyObject>) i.getSerializableExtra("LIST");就这样。
Stack Overflow用户
发布于 2015-01-27 23:20:45
Parcelable对象类
public class Student implements Parcelable {
int id;
String name;
public Student(int id, String name) {
this.id = id;
this.name = name;
}
public int getId() {
return id;
}
public String getName() {
return name;
}
@Override
public int describeContents() {
// TODO Auto-generated method stub
return 0;
}
@Override
public void writeToParcel(Parcel dest, int arg1) {
// TODO Auto-generated method stub
dest.writeInt(id);
dest.writeString(name);
}
public Student(Parcel in) {
id = in.readInt();
name = in.readString();
}
public static final Parcelable.Creator<Student> CREATOR = new Parcelable.Creator<Student>() {
public Student createFromParcel(Parcel in) {
return new Student(in);
}
public Student[] newArray(int size) {
return new Student[size];
}
};
}和列表
ArrayList<Student> arraylist = new ArrayList<Student>();来自调用活动的代码
Intent intent = new Intent(this, SecondActivity.class);
Bundle bundle = new Bundle();
bundle.putParcelableArrayList("mylist", arraylist);
intent.putExtras(bundle);
this.startActivity(intent);调用活动上的代码
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
Bundle bundle = getIntent().getExtras();
ArrayList<Student> arraylist = bundle.getParcelableArrayList("mylist");
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/12092612
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