Activity之间的数据交换（简单的数据，类对象，图片）

Bundle bundle=new Bundle();
bundle.putString("name", "star");
bundle.putInt("age", 23);
intent.putExtras(bundle);
startActivity(intent);

Intent intent=getIntent();
Bundle bundle=intent.getExtras();
String name=bundle.getString("name");
int age=bundle.getInt("age");

Person person =new Person(21, "star", "Guangzhou");
Bundle bundle=new Bundle();
bundle.putSerializable("person", person);
intent.putExtras(bundle);
startActivity(intent);

public class Person implements Serializable{
private int age;
private String name;
private String address;

public Person(int age,String name,String address){
this.age=age;this.name=name;
this.address=address;
}

public String toString(){
return "name="+name+",age="+age+",address"+address;
}
}

Person person =(Person) intent.getSerializableExtra("person");

textView.setText(person.toString());

Bundle bundle=new Bundle();
Bitmap bitmap =BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
bundle.putParcelable("bitmap", bitmap);
intent.putExtras(bundle);
startActivity(intent);

Bitmap bitmap=intent.getParcelableExtra("bitmap");
imageView.setImageBitmap(bitmap);