参考资料：https://www.jianshu.com/p/32a2ec8f35ae
https://www.cnblogs.com/tangZH/p/10998065.html
简单使用：
进行Android开发的时候，无法将对象的引用传给Activities或者Fragments，我们需要将这些对象放到一个Intent或者Bundle里面，然后再传递。
1. 建立两个Activity
https://jingyan.baidu.com/album/95c9d20da0165cec4e7561e0.html?picindex=9
1.在layout下，新建second_activity.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".SecondActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!The Second Activity"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/textView"
android:scrollbars="vertical"
android:layout_width="212dp"
android:layout_height="100dp"
android:text="TextView"
tools:layout_editor_absoluteX="111dp"
tools:layout_editor_absoluteY="222dp" />
</androidx.constraintlayout.widget.ConstraintLayout>
- 在AndroidManifest.xml里面新增activity
<activity android:name=".SecondActivity"
android:label="SecondActicity">
<intent-filter>
<action android:name="com.litreily.SecondActivity" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
3.新建SecondActivity.java
public class SecondActivity extends AppCompatActivity {
TextView view;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.second_activity);
}
}
2.实现Parcelable接口
新建一个Book类，Author类同理
package com.example.paceltest;
import android.os.Parcel;
import android.os.Parcelable;
public class Book implements Parcelable {
private String name;
private int id;
//private String author;
private Author author;
public Book(String name, int id, Author author){
this.name = name;
this.id = id;
this.author = author;
}
/**
* 反序列化
*/
protected Book(Parcel in) {
name = in.readString();
id = in.readInt();
author = in.readParcelable(Author.class.getClassLoader());
}
public static final Creator<Book> CREATOR = new Creator<Book>() {
@Override
public Book createFromParcel(Parcel in) {
return new Book(in);
}
@Override
public Book[] newArray(int size) {
return new Book[size];
}
};
@Override
public int describeContents() {
return 0;
}
/**
*序列化
*/
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(name);
dest.writeInt(id);
dest.writeParcelable(author,0);
}
@Override
public String toString(){
return "name : " + name + "\""+" id: "+id+"\""+" author: "+author.toString();
}
}
在MainAcitivity中添加
public void onClick(View view){
//startActivity(new Intent("com.litreily.SecondActivity"));
Intent intent = new Intent(MainActivity.this,SecondActivity.class);
Author author = new Author("xxx","China");
intent.putExtra("key",new Book("红宝书",1,author));
startActivity(intent);
}
在SecondActivity中添加
view.setOnClickListener(new TextView.OnClickListener(){
@Override
public void onClick(View v) {
Intent intent = getIntent();
Book book = intent.getParcelableExtra("key");
String out = book.toString();
view.setText(out);
}
});
结果：
image.png
