Android---Intent传递对象、对象数组

Android有两种方式传递对象，分别让对象实现Serializable接口和Parceable接口。

用Serializable传递对象：bundle.putSerializable(“key”,object); 接收对象: (Object)getIntent().getSerializableExtra(“key”);

用Parceable传递对象： bundle.putParcelable(“key”,object);接收对象:(Object)getIntent().getParcelableExtra(“key”);

下面举例说明：

1. 新建Student类实现Serializable接口

public class Student implements Serializable {

private static final long serialVersionUID = 1L;
private int id;
private String name;

public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}

2.新建Teacher类实现Parceable接口

public class Teacher implements Parcelable {

private int id;
private String department;

public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getDepartment() {
return department;
}
public void setDepartment(String department) {
this.department = department;
}
@Override
public int describeContents() {
return 0;
}

// 注意这里的write顺序跟下面的read顺序一定要一样
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(id);
dest.writeString(department);
}

public static final Parcelable.Creator<Teacher> CREATOR = new Creator<Teacher>() {

@Override
public Teacher createFromParcel(Parcel source) {
Teacher teacher = new Teacher();
teacher.id = source.readInt();
teacher.department = source.readString();
return teacher;
}

@Override
public Teacher[] newArray(int size) {
return new Teacher[size];
}
};
}

3.使用Serializable传递、接收对象的方法：

private void serializable_pass() {
Student stu = new Student();
stu.setId(1000);
stu.setName("小明");
Intent intent = new Intent(MainActivity.this,SerializableActivity.class);
Bundle bundle = new Bundle();
bundle.putSerializable("serial", stu);
intent.putExtras(bundle);
startActivity(intent);
}

Student stu = (Student) getIntent().getSerializableExtra("serial");

4.使用Parceable传递、接收对象的方法：

private void parceable_pass() {
Teacher teacher = new Teacher();
teacher.setId(1001);
teacher.setDepartment("计算机科学与技术");
Intent intent = new Intent(MainActivity.this, ParceableActivity.class);
Bundle bundle = new Bundle();
bundle.putParcelable("parceable", teacher);
intent.putExtras(bundle);
startActivity(intent);
}

Teacher teacher = (Teacher) getIntent().getParcelableExtra("parceable");

5.使用Serializable传递、接收对象数组的方法：

private void serializableList_pass() {
List<Student> list = new ArrayList<>();
Student stu1 = new Student();
stu1.setId(1000);
stu1.setName("小明");
Student stu2 = new Student();
stu2.setId(1002);
stu2.setName("小红");
list.add(stu1);
list.add(stu2);
Intent intent = new Intent(MainActivity.this, ObjectListActivity.class);
//把list强制类型转换成Serializable类型
intent.putExtra("objectList", (Serializable) list);
startActivity(intent);
}

List<Student> stu = (List<Student>) getIntent().getSerializableExtra(
"objectList");

6.传递、接收普通数组方法(String int):

private void stringList_pass() {
ArrayList<String> list = new ArrayList<>();
list.add("string1");
list.add("string2");
Intent intent = new Intent(MainActivity.this, StringListActivity.class);
intent.putStringArrayListExtra("stringList", list);
startActivity(intent);
}

ArrayList<String> list = getIntent().getStringArrayListExtra(
"stringList");

//传递int型数组
intent.putIntegerArrayListExtra(key, list);
//接收int型数组
list =(ArrayList<Integer>) getIntent().getIntegerArrayListExtra(key);

运行截图：

源码下载