POJO类“Post”(注意它是实现Serializable的)

package com.example.booklib;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

import android.graphics.Bitmap;

public class Post implements Serializable{
    public String message;
    public String bitmap;
    List<Comment> commentList = new ArrayList<Comment>();
    public String getMessage() {
        return message;
    }
    public void setMessage(String message) {
        this.message = message;
    }
    public String getBitmap() {
        return bitmap;
    }
    public void setBitmap(String bitmap) {
        this.bitmap = bitmap;
    }
    public List<Comment> getCommentList() {
        return commentList;
    }
    public void setCommentList(List<Comment> commentList) {
        this.commentList = commentList;
    }

}

POJO类“Comment”(由于是Post类的成员，它也需要实现Serializable)

    package com.example.booklib;

    import java.io.Serializable;

    public class Comment implements Serializable{
        public String message;
        public String fromName;
        public String getMessage() {
            return message;
        }
        public void setMessage(String message) {
            this.message = message;
        }
        public String getFromName() {
            return fromName;
        }
        public void setFromName(String fromName) {
            this.fromName = fromName;
        }

    }

然后在您的活动类中，您可以执行以下操作将对象传递给另一个活动。

ListView listview = (ListView) findViewById(R.id.post_list);
listview.setOnItemClickListener(new OnItemClickListener(){
        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                int position, long id) {
            Post item = (Post)parent.getItemAtPosition(position);
            Intent intent = new Intent(MainActivity.this,CommentsActivity.class);
            intent.putExtra("post",item);
            startActivity(intent);

        }
    });

在您的接收类“CommentsActivity”中，您可以获得如下数据

Post post =(Post)getIntent().getSerializableExtra("post");

你可以使用putExtra(Serializable..)和getSerializableExtra()方法来传递和检索你的类类型的对象;你必须将你的类标记为Serializable，并确保你所有的成员变量也是Serializable…

我使用Gson及其强大而简单的api在活动之间发送对象，

例子

// This is the object to be sent, can be any object
public class AndroidPacket {

    public String CustomerName;

   //constructor
   public AndroidPacket(String cName){
       CustomerName = cName;
   }   
   // other fields ....


    // You can add those functions as LiveTemplate !
    public String toJson() {
        Gson gson = new Gson();
        return gson.toJson(this);
    }

    public static AndroidPacket fromJson(String json) {
        Gson gson = new Gson();
        return gson.fromJson(json, AndroidPacket.class);
    }
}

2个函数，你将它们添加到你想要发送的对象中

使用

将对象从A发送到B

    // Convert the object to string using Gson
    AndroidPacket androidPacket = new AndroidPacket("Ahmad");
    String objAsJson = androidPacket.toJson();

    Intent intent = new Intent(A.this, B.class);
    intent.putExtra("my_obj", objAsJson);
    startActivity(intent);

在B接收

@Override
protected void onCreate(Bundle savedInstanceState) {        
    Bundle bundle = getIntent().getExtras();
    String objAsJson = bundle.getString("my_obj");
    AndroidPacket androidPacket = AndroidPacket.fromJson(objAsJson);

    // Here you can use your Object
    Log.d("Gson", androidPacket.CustomerName);
}

我几乎在我做的每个项目中都使用它，我没有任何性能问题。

创建Android应用程序

文件>>新建>> Android应用程序

输入项目名称:android-pass-object-to-activity

Pakcage: com.hmkcode.android

保持其他默认选择，点击下一步直到完成

在开始创建应用程序之前，我们需要创建POJO类“Person”，我们将使用它将对象从一个活动发送到另一个活动。注意，该类正在实现Serializable接口。

将位于

package com.hmkcode.android;
import java.io.Serializable;

public class Person implements Serializable{

    private static final long serialVersionUID = 1L;

    private String name;
    private int age;

        // getters & setters....

    @Override
    public String toString() {
        return "Person [name=" + name + ", age=" + age + "]";
    }   
}

两个活动的两种布局

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >

<LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <TextView
        android:id="@+id/tvName"
        android:layout_width="100dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:gravity="center_horizontal"
        android:text="Name" />

    <EditText
        android:id="@+id/etName"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"

        android:ems="10" >
        <requestFocus />
    </EditText>
</LinearLayout>

<LinearLayout
     android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
<TextView
    android:id="@+id/tvAge"
    android:layout_width="100dp"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:gravity="center_horizontal"
    android:text="Age" />
<EditText
    android:id="@+id/etAge"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:ems="10" />
</LinearLayout>

<Button
    android:id="@+id/btnPassObject"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal"
    android:text="Pass Object to Another Activity" />

</LinearLayout>

activity_another.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
 >

<TextView
    android:id="@+id/tvPerson"
    android:layout_height="wrap_content"
    android:layout_width="fill_parent"
    android:layout_gravity="center"
    android:gravity="center_horizontal"
 />

</LinearLayout>

两个活动类别

1)ActivityMain.java

package com.hmkcode.android;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends Activity implements OnClickListener {

Button btnPassObject;
EditText etName, etAge;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    btnPassObject = (Button) findViewById(R.id.btnPassObject);
    etName = (EditText) findViewById(R.id.etName);
    etAge = (EditText) findViewById(R.id.etAge);

    btnPassObject.setOnClickListener(this);
}

@Override
public void onClick(View view) {

    // 1. create an intent pass class name or intnet action name 
    Intent intent = new Intent("com.hmkcode.android.ANOTHER_ACTIVITY");

    // 2. create person object
    Person person = new Person();
    person.setName(etName.getText().toString());
    person.setAge(Integer.parseInt(etAge.getText().toString()));

    // 3. put person in intent data
    intent.putExtra("person", person);

    // 4. start the activity
    startActivity(intent);
}

}

2)AnotherActivity.java

package com.hmkcode.android;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;

public class AnotherActivity extends Activity {

TextView tvPerson;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_another);

    // 1. get passed intent 
    Intent intent = getIntent();

    // 2. get person object from intent
    Person person = (Person) intent.getSerializableExtra("person");

    // 3. get reference to person textView 
    tvPerson = (TextView) findViewById(R.id.tvPerson);

    // 4. display name & age on textView 
    tvPerson.setText(person.toString());

}
}

你可以通过intent发送可序列化对象

// send where details is object
ClassName details = new ClassName();
Intent i = new Intent(context, EditActivity.class);
i.putExtra("Editing", details);
startActivity(i);


//receive
ClassName model = (ClassName) getIntent().getSerializableExtra("Editing");

And 

Class ClassName implements Serializable {
} 

我发现最简单的解决办法是… 创建带有getter和setter的静态数据成员的类。

从一个活动中设置并从另一个活动中获取该对象。

活动

mytestclass.staticfunctionSet("","",""..etc.);

活动b

mytestclass obj= mytestclass.staticfunctionGet();