android： activity之间传递复杂数据类型[使用Serializable序列化或者Parcelable序列化]

最新推荐文章于 2021-05-26 06:26:14 发布

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最新推荐文章于 2021-05-26 06:26:14 发布

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分类专栏： android

本文链接：https://blog.youkuaiyun.com/go_to_learn/article/details/8513625

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本文探讨了在Android中如何通过Serializable和Parcelable接口在Activity之间传递复杂数据类型，详细阐述了两种序列化的实现步骤。

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1. 实现Serializable接口比较简单直接实现即可

public class Student implements Serializable{
	private static final long serialVersionUID = 1L;
	public int id;
	public String name;

}

2.实现Parcelable接口需要在类中添加一个静态成员变量 CREATOR，这个变量需要继承 Parcelable.Creator 接口。

	class Teacher implements Parcelable{

		private int id;
		private String name;
		
	    public Teacher(int id, String name) {  
	        this.id = id;  
	        this.name = name;  
	    }  
	    
		@Override
		public int describeContents() {
			return 0;
		}

		@Override
		public void writeToParcel(Parcel dest, int flags) {
			dest.writeInt(id);  
	        dest.writeString(name);  
		}
	    public static final Parcelable.Creator<Teacher> CREATOR = new Parcelable.Creator<Teacher>() {  
	    	  
	        @Override  
	        public Teacher createFromParcel(Parcel source) {  
	            Teacher teacher = new Teacher(source.readInt(), source.readString());  
	            return teacher;  
	        }  
	 
	        @Override  
	        public Teacher[] newArray(int size) {  
	            return null;  
	        }  
	    }; 
		
	}

发送数据：

 // Serializable序列化传送  
            ArrayList<Student> list = new ArrayList<Student>();  
            Student student = new Student(1, "Jim");  
            list.add(student);  
            Intent intent = new Intent(this, SecondActivity.class);  
            intent.putExtra("STUDENT_INFO", list);  
            startActivity(intent);

 // parcel序列化传送  
            ArrayList<Teacher> list = new ArrayList<Teacher>();  
            Teacher teacher1 = new Teacher(1, "techaer1");  
            list.add(teacher1);  
            Intent intent = new Intent(this, SecondActivity.class);  
            intent.putExtra("TEACHER_INFO", list);  
            startActivity(intent);

接收数据：

        Intent intent = getIntent();  
        // serializable  
         ArrayList<Student> list = (ArrayList<Student>) intent.getSerializableExtra("STUDENT_INFO");

        // parcelble  
        ArrayList<Teacher> list = intent.getParcelableArrayListExtra("TEACHER_INFO");