intent传值传对象跳转

intent传值传对象跳转

1.传值

//原activity中存入一个字段

intent = new Intent(From.this, To.class);

intent.putExtra("switch", "chongzhi");

startActivity(intent);

//跳转至新的activity中后q取出该字段

Intent switchIntent = getIntent();

String myswitch = switchIntent.getStringExtra("switch");

2.传对象

intent = dialogInfo.getIntent();

/往Intent对象中传入一个对象

UserInfo 需实现Parcelable接口 创建creator

//存到一个Bundle 中

Bundle myBundle = new Bundle();

myBundle.putParcelable("userInfo", userInfo);


intent.putExtras(myBundle);

//在新的 Toactivity中取对象

Intent getIntent = getIntent();

UserInfo userInfo=(UserInfo)(getIntent.getParcelableExtra("userInfo"));

详情见http://caiwb1990.iteye.com/blog/1404201

3.附实现Parcelable的接口类 也就是序列化该对象

package com.example.entity;

import android.os.Parcel;

import android.os.Parcelable;

import android.os.Parcelable.Creator;

public class UserInfo implements Parcelable{

private int id;

private String username;

private String password;

private String phoneNum;

private double money;

@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.writeString(username);

dest.writeString(password);

dest.writeString(phoneNum);

dest.writeDouble(money);

}

public static final Creator<UserInfo> CREATOR = new Creator<UserInfo>() {

@Override

public UserInfo createFromParcel(Parcel source) {

UserInfo entity = new UserInfo();

// 顺序需和写入顺序一样

entity.username= source.readString();

entity.password = source.readString();

entity.phoneNum = source.readString();

entity.money = source.readDouble();

return  entity ;

}

@Override

public UserInfo[] newArray(int arg0) {

// TODO Auto-generated method stub

return null;

}

};

}