Intent传递对象,有两种方法
1. 实现Serializable接口
类要生成序列化ID,并且不能是内部类
2. 实现Parcelable接口
参照Parcelable的doc文档
实现Serializable接口的代码如下:
public class Person implements Serializable { private static final long serialVersionUID = -4520602519989894109L; String name; String age; public Person(String name, String age) { super(); this.name = name; this.age = age; } @Override public String toString() { return "Person [name=" + name + ", age=" + age + "]"; } }
从A启动B,通过intent传递person对象过去
private void startNewActivity() { Intent intent = new Intent(); intent.setClass(MainActivity.this, SecondActivity.class); String name = etname.getText().toString(); String age = etage.getText().toString(); //用intent传递对象,那个类要实现序列化接口 Person person = new Person(name, age); intent.putExtra(constant.PERSON, person); startActivity(intent); }
在B中得到A传过来的对象
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_second); TextView textView = (TextView) findViewById(R.id.textView1); Intent intent = getIntent(); Person person = (Person) intent.getSerializableExtra(constant.PERSON); textView.setText(person.toString()); }
实现Parcelable接口的代码如下:
public class Person implements Parcelable { String name; String age; // 参照Parcelable的doc文档 public int describeContents() { return 0; } public void writeToParcel(Parcel out, int flags) { out.writeString(name);// 写跟下面的读顺序要一样 out.writeString(age); } public static final Parcelable.Creator<Person> CREATOR = new Parcelable.Creator<Person>() { public Person createFromParcel(Parcel in) { return new Person(in); } public Person[] newArray(int size) { return new Person[size]; } }; public Person(String name, String age) { super(); this.name = name; this.age = age; } public Person(Parcel in) { name = in.readString();// 读跟上面的写顺序要一样 age = in.readString(); } @Override public String toString() { return "Person [name=" + name + ", age=" + age + "]"; } @Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + ((age == null) ? 0 : age.hashCode()); result = prime * result + ((name == null) ? 0 : name.hashCode()); return result; } @Override public boolean equals(Object obj) { if (this == obj) return true; if (obj == null) return false; if (getClass() != obj.getClass()) return false; Person other = (Person) obj; if (age == null) { if (other.age != null) return false; } else if (!age.equals(other.age)) return false; if (name == null) { if (other.name != null) return false; } else if (!name.equals(other.name)) return false; return true; } }
在B中得到从A传来的对象
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_second); TextView textView = (TextView) findViewById(R.id.textView1); Intent intent = getIntent(); Person person = (Person) intent.getParcelableExtra(constant.PERSON); textView.setText(person.toString()); }