Intent傳遞序列化資料
阿新 • • 發佈:2019-01-25
Serializable序列化資料
- 這是一種比較簡單的序列化,只需要將要序列化的類實現Serializable介面,不用再執行其他操作,在Intent中放入序列化資料即可
- 序列化資料
public class Student implements Serializable{
private String name;
private String age;
private String sex;
public Student(String name, String age, String sex) {
this.name = name;
this .age = age;
this.sex = sex;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
}
- 放入和拿出資料
//放入資料
Student lisi=new Student("李四","25","女");
intent.putExtra("lisi",lisi);
//取出資料
Student lisi= (Student) intent.getSerializableExtra ("lisi");
System.out.println(lisi.getName());
Parcelable序列化資料
- 序列化資料,由於as很智慧,基本的複寫方法,也會幫我們自動生成
public class People implements Parcelable{
private String name;
private String age;
private String sex;
public People(String name, String age, String sex) {
this.name = name;
this.age = age;
this.sex = sex;
}
public static final Creator<People> CREATOR = new Creator<People>() {
@Override
public People createFromParcel(Parcel in) {
return new People(in);
}
@Override
public People[] newArray(int size) {
return new People[size];
}
};
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
@Override
public int describeContents() {
return 0;
}
//下面的兩個方法,程式碼中內容必須一一對應
protected People(Parcel in) {
name = in.readString();
age = in.readString();
sex = in.readString();
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(name);
dest.writeString(age);
dest.writeString(sex);
}
}
- 放入和取出資料
//放入資料
People zhangsan=new People("張三","20","男");
intent.putExtra("zhangsan",zhangsan)
//取出資料
Intent intent=getIntent();
People zhangsan= (People) intent.getParcelableExtra("zhangsan");
textView.setText(zhangsan.getName()+zhangsan.getAge()+zhangsan.getSex());
二者區別
- 從編寫上來講Serializable序列化更比較書寫簡單,但是Serializable同時效率會比較低,因為Serializable原本是java中用來序列化的介面
- Parcelable雖然編寫略複雜,但是由於as的存在,讓這些複雜都不在複雜,並且其效率更高,因此建議使用Parcelable序列化來傳遞資料。