[android]Android怎样能有两个Activity传递的自定义数据

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原文：http://wenku.baidu.com/view/d1250a16cc7931b765ce1566.html

               

在开发中,本人遇到这样问题想在两个activity之间传递某个自定义类对象,但是使用Bundle发现里面只能传送已经封装好的int,float,String等类型,自定义的类无法发送。    

后来上网查阅相关资料发现Bundle中有这两个方法putSerializable和putLongArray两个方法对自定义数据进行序列化即可实现所希望的功能。        

需要注意的是你所传递的自定义数据必须implementsSerializable或者Parcelable接口,可以用bundleputSerializable(String,Serizlizable)数据或者直接用intentputExtrr(String,Serizlizable)数据。如果该自定义数据里面嵌套了其他自定义数据类型,则必须都要implementsSerializable或者Parcelable接口才行,不然会报错...

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原文：http://blog.csdn.net/snowleopard_wu/article/details/7035994

作为android开发者大家都知道两个activity之间的跳转及数据的传递是通过intent和bundle来实现，在intent下有挺多方法来协助我们实现连个activity间的交互，但有时我们需要传递的不单单只是一个简单的数据类型，而是我们自己封转的数据对象，二进制对象，那我们改如何实现呢？

       要实现它，我们有两个方法，都是去实现android里的接口，他们分别是serialiable和Parcelabel,对于serialable的实现方式比较简单，只需在我们的数据类实现它，并在activity下通过bundle的协助，使用putserialableExtras将对象存放在bundle中，而对于Parcelable我需要重新实现它下面的creator对象，之后通过intent进行传递。

下面是实现这两种方法的代码：

（1）Serialable

          

 package cn.com.wd;

 import java.io.Serializable;

 public class Person implements Serializable{
     /**
      *
      */
     private static final long serialVersionUID = 1L;
     private String name;
     private String age;
     private String sex;
     private String id;
     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;
     }
     public String getId() {
         return id;
     }
     public void setId(String id) {
         this.id = id;
     }

 }

 

 package cn.com.wd;

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

 public class ObjectPassDemoActivity extends Activity {
     private EditText name,id,sex,age;
     private Button button;
     /** Called when the activity is first created. */
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);
         name = (EditText)findViewById(R.id.editname);
         id = (EditText)findViewById(R.id.editage);
         sex = (EditText)findViewById(R.id.editsex);
         age = (EditText)findViewById(R.id.editage);
         button = (Button)findViewById(R.id.next);
         button.setOnClickListener(new OnClickListener() {
             @Override
             public void onClick(View v) {
                 // TODO Auto-generated method stub
                 String namestr = name.getText().toString();
                 String idstr = id.getText().toString();
                 String sexstr = sex.getText().toString();
                 String agestr = age.getText().toString();
                 Person person = new Person();
                 person.setAge(agestr);
                 person.setId(idstr);
                 person.setName(namestr);
                 person.setSex(sexstr);
                 Bundle bundle = new Bundle();
                 bundle.putSerializable("personObject", person);
                 Intent intent = new Intent(ObjectPassDemoActivity.this, ResultActivty.class);
                 intent.putExtras(bundle);
                 startActivity(intent);
             }
         });
     }
 }

 

 package cn.com.wd;

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

 public class ResultActivty extends Activity {
     private TextView name,age,id,sex;
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         // TODO Auto-generated method stub
         super.onCreate(savedInstanceState);
         setContentView(R.layout.result);
         name = (TextView)findViewById(R.id.name);
         age = (TextView)findViewById(R.id.age);
         id = (TextView)findViewById(R.id.id);
         sex = (TextView)findViewById(R.id.sex);
         Intent intent = this.getIntent();
         Bundle bundle = intent.getExtras();
         Person person = (Person)bundle.getSerializable("personObject");
         name.setText(person.getName());
         age.setText(person.getAge());
         id.setText(person.getId());
         sex.setText(person.getSex());
     }

 }

(2)Parcelable

    

 package cn.com.PracelAbleTest;

 import java.util.HashMap;

 import android.os.Parcel;
 import android.os.Parcelable;

 public class Person implements Parcelable {
     public HashMap<String, Object> map = new HashMap<String, Object>();
     public String name;

     @Override
     public int describeContents() {
         // TODO Auto-generated method stub
         return 0;
     }

     @Override
     public void writeToParcel(Parcel dest, int flags) {
         // TODO Auto-generated method stub
         dest.writeMap(map);
         dest.writeString(name);
     }

     public static final Parcelable.Creator<Person> CREATOR = new Parcelable.Creator<Person>() {

         @Override
         public Person createFromParcel(Parcel source) {
             // TODO Auto-generated method stub
             Person p = new Person();
             p.map = source.readHashMap(HashMap.class.getClassLoader());
             p.name = source.readString();
             return p;
         }

         @Override
         public Person[] newArray(int size) {
             // TODO Auto-generated method stub
             return null;
         }
     };
 }

 

 package cn.com.PracelAbleTest;

 import java.util.HashMap;

 import android.app.Activity;
 import android.content.Intent;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.os.Bundle;

 public class ParcelableDemoActivity extends Activity {
     private Bitmap bitmap;
     /** Called when the activity is first created. */
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);
         bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
         Intent intent = new Intent();
         Person p = new Person();
         p.map = new HashMap<String, Object>();
         p.map.put("key","ido");
         p.map.put("img", bitmap);
         p.name = "ok";
         intent.putExtra("key",p);
         intent.setClass(ParcelableDemoActivity.this,NextDemo.class);
         startActivity(intent);
     }
 }

 

 package cn.com.PracelAbleTest;

 import android.app.Activity;
 import android.content.Intent;
 import android.graphics.Bitmap;
 import android.os.Bundle;
 import android.widget.ImageView;

 public class NextDemo extends Activity{
     ImageView iv ;
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         // TODO Auto-generated method stub
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);
         iv = (ImageView)findViewById(R.id.image);
         Intent i = getIntent();
         Person p = i.getParcelableExtra("key");
         System.out.println("----->"+p.name);
         System.out.println("----->"+p.map.get("key"));
         Bitmap bitmap = (Bitmap) p.map.get("img");
         iv.setImageBitmap(bitmap);
     }