使用谷歌的Gson库，您可以将object传递给另一个活动。实际上，我们将以json字符串的形式转换对象，传递给其他活动后，我们将再次重新转换为这样的对象

考虑这样一个bean类

 public class Example {
    private int id;
    private String name;

    public Example(int id, String name) {
        this.id = id;
        this.name = 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;
    }
}

我们需要传递Example类的对象

Example exampleObject=new Example(1,"hello");
String jsonString = new Gson().toJson(exampleObject);
Intent nextIntent=new Intent(this,NextActivity.class);
nextIntent.putExtra("example",jsonString );
startActivity(nextIntent);

对于读取，我们需要在NextActivity中做相反的操作

 Example defObject=new Example(-1,null);
    //default value to return when example is not available
    String defValue= new Gson().toJson(defObject);
    String jsonString=getIntent().getExtras().getString("example",defValue);
    //passed example object
    Example exampleObject=new Gson().fromJson(jsonString,Example .class);

在gradle中添加这个依赖

compile 'com.google.code.gson:gson:2.6.2'

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();

快速需求的简短回答

1. 将类实现为可序列化的。

如果你有任何内部类，不要忘记将它们实现为Serializable !!

public class SportsData implements  Serializable
public class Sport implements  Serializable

List<Sport> clickedObj;

2. 将你的对象放入Intent中

 Intent intent = new Intent(SportsAct.this, SportSubAct.class);
            intent.putExtra("sport", clickedObj);
            startActivity(intent);

3.并在另一个活动类中接收您的对象

Intent intent = getIntent();
    Sport cust = (Sport) intent.getSerializableExtra("sport");

We can send data one Activty1 to Activity2 with multiple ways like.
1- Intent
2- bundle
3- create an object and send through intent
.................................................
1 - Using intent
Pass the data through intent
Intent intentActivity1 = new Intent(Activity1.this, Activity2.class);
intentActivity1.putExtra("name", "Android");
startActivity(intentActivity1);
Get the data in Activity2 calss
Intent intent = getIntent();
if(intent.hasExtra("name")){
     String userName = getIntent().getStringExtra("name");
}
..................................................
2- Using Bundle
Intent intentActivity1 = new Intent(Activity1.this, Activity2.class);
Bundle bundle = new Bundle();
bundle.putExtra("name", "Android");
intentActivity1.putExtra(bundle);
startActivity(bundle);
Get the data in Activity2 calss
Intent intent = getIntent();
if(intent.hasExtra("name")){
     String userName = getIntent().getStringExtra("name");
}
..................................................
3-  Put your Object into Intent
Intent intentActivity1 = new Intent(Activity1.this, Activity2.class);
            intentActivity1.putExtra("myobject", myObject);
            startActivity(intentActivity1); 
 Receive object in the Activity2 Class
Intent intent = getIntent();
    Myobject obj  = (Myobject) intent.getSerializableExtra("myobject");

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");

Start another activity from this activity pass parameters via Bundle Object

Intent intent = new Intent(this, YourActivity.class);
Intent.putExtra(AppConstants.EXTRAS.MODEL, cModel);
startActivity(intent);
Retrieve on another activity (YourActivity)

ContentResultData cModel = getIntent().getParcelableExtra(AppConstants.EXTRAS.MODEL);