Activity对象传送

一：发送数据的Activity的主要方法

//按钮事件方法

public void onButtonClick(View v){
//创建一个跳转意图
Intent intent=new Intent(this,MainActivity2.class);
//第一种存值方式
Bundle bundle=new Bundle();
bundle.putString("name","世端");
bundle.putInt("age",22);
bundle.putLong("money", 1000);
intent.putExtra("person", bundle);

//第二种存值方式
intent.putExtra("name2","一笔");

//存储对象Serializable
Cat cat=new Cat();
cat.id=22;
cat.name="小花";
cat.color="黑白相间";
intent.putExtra("cat", cat);
//Parcelable
Dog dog=new Dog();
dog.name="小白";
dog.sex="公";
intent.putExtra("dog", dog);

startActivity(intent);

}

二：返回数据Activity的主要方法

protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//获取从MainActivity中传过来的数据
Intent intent=getIntent();
Bundle bundle=intent.getBundleExtra("person");
String name=bundle.getString("name");
int age=bundle.getInt("age");
long money=bundle.getLong("money");
String name2=intent.getStringExtra("name2");
//获取 cat对象
Cat cat=(Cat)intent.getSerializableExtra("cat");
//获取dog对象
Dog dog=(Dog)intent.getParcelableExtra("dog");

setContentView(R.layout.activity_main2);
tv=(TextView)findViewById(R.id.textView2);
tv.setText("我的名字是："+cat.name+"，我今年"+cat.id+"岁啦！老婆的颜色是"+cat.color+"\n"+dog.toString());
System.out.println("onCreate2...........");

}

相关的javabean

//方式一实现Serializable接口
public class Cat implements Serializable{
int id;
String name;
String color;
@Override
public String toString() {
return "Cat [id=" + id + ", name=" + name + ", color=" + color + "]";
}
}

//方式二实现Parcelable

package com.example.android029;


import android.os.Parcel;
import android.os.Parcelable;


public class Dog implements Parcelable{
String name;
String sex;

public static final Parcelable.Creator<Dog> CREATOR = new Parcelable.Creator<Dog>() {
public Dog createFromParcel(Parcel in) {
return new Dog(in);
}


public Dog[] newArray(int size) {
return new Dog[size];
}
};
public Dog(Parcel in) {
// TODO Auto-generated constructor stub
name=in.readString();
sex=in.readString();
}
public Dog(){}


@Override
public int describeContents() {
// TODO Auto-generated method stub
return 0;
}


@Override
public void writeToParcel(Parcel dest, int flags) {
// TODO Auto-generated method stub
dest.writeString(name);
dest.writeString(sex);

}
@Override
public String toString() {
return "Dog [name=" + name + ", sex=" + sex + "]";
}



}