在Android中通过intent只能传递基本类型的数据，如果想要传递自定义的javabean，必须实现Serializable或者Parcelable接口。Parcelable接口是在Android新引入的接口。使用方法如下：

1. public class DownloadItem  implements Parcelable{ 
2.  
3.     private String url; 
4.     private String  gameName; 
5.     private String gamePkgName; 
6.     private int total_bytes; 
7.     private int current_bytes; 
8.     private String path; 
9.     public DownloadItem(){}; 
10.  
11.     public DownloadItem(String url, String gameName, String gamePkgName, 
12.             int total_bytes, int current_bytes, String path) { 
13.         super(); 
14.         this.url = url; 
15.         this.gameName = gameName; 
16.         this.gamePkgName = gamePkgName; 
17.         this.total_bytes = total_bytes; 
18.         this.current_bytes = current_bytes; 
19.         this.path = path; 
20.     } 
21.  
22.     @Override 
23.     public String toString() { 
24.         return "DownloadItem [url=" + url + ", gameName=" + gameName 
25.                 + ", gamePkgName=" + gamePkgName + ", total_bytes=" 
26.                 + total_bytes + ", current_bytes=" + current_bytes + ", path=" 
27.                 + path + "]"; 
28.     } 
29.  
30.     public String getUrl() { 
31.  
32.         return url; 
33.     } 
34.  
35.     public void setUrl(String url) { 
36.         this.url = url; 
37.     } 
38.  
39.     public String getGameName() { 
40.         return gameName; 
41.     } 
42.  
43.     public void setGameName(String gameName) { 
44.         this.gameName = gameName; 
45.     } 
46.  
47.     public String getGamePkgName() { 
48.         return gamePkgName; 
49.     } 
50.  
51.     public void setGamePkgName(String gamePkgName) { 
52.         this.gamePkgName = gamePkgName; 
53.     } 
54.  
55.     public int getTotal_bytes() { 
56.         return total_bytes; 
57.     } 
58.  
59.     public void setTotal_bytes(int total_bytes) { 
60.         this.total_bytes = total_bytes; 
61.     } 
62.  
63.     public int getCurrent_bytes() { 
64.         return current_bytes; 
65.     } 
66.  
67.     public void setCurrent_bytes(int current_bytes) { 
68.         this.current_bytes = current_bytes; 
69.     } 
70.  
71.     public String getPath() { 
72.         return path; 
73.     } 
74.  
75.     public void setPath(String path) { 
76.         this.path = path; 
77.     } 
78.  
79.     @Override 
80.     public int describeContents() { 
81.         // TODO Auto-generated method stub 
82.         return 0; 
83.     } 
84.  
85.     @Override 
86.     public void writeToParcel(Parcel dest, int flags) { 
87.  
88.  
89.         dest.writeString(this.url); 
90.         dest.writeString(this.gameName); 
91.         dest.writeString(this.gamePkgName); 
92.         dest.writeInt(this.total_bytes); 
93.         dest.writeInt(this.current_bytes); 
94.         dest.writeString(this.path); 
95.     } 
96.  
97.     public static final Parcelable.Creator<DownloadItem> CREATOR = new Parcelable.Creator<DownloadItem>() { 
98.  
99.         @Override 
100.         public DownloadItem createFromParcel(Parcel source) { 
101.             return new DownloadItem(source.readString(),source.readString(),source.readString(),source.readInt(),source.readInt(),source.readString()); 
102.         } 
103.  
104.         @Override 
105.         public DownloadItem[] newArray(int size) { 
106.             return new DownloadItem[size]; 
107.         } 
108.     }; 
109. }