Android中Parcelable的使用

1、封装要进行跨进程传输的对象

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1. package com.lewa;  
2.   
3. import android.graphics.Bitmap;  
4. import android.os.Parcel;  
5. import android.os.Parcelable;  
6.   
7.   
8. public class WeiBoWidget implements Parcelable{  
9.       
10.     private String contentText;  
11.     private Bitmap contentPicture;  
12.       
13.     public WeiBoWidget(){}  
14.   
15.     public String getContentText() {  
16.         return contentText;  
17.     }  
18.   
19.     public void setContentText(String contentText) {  
20.         this.contentText = contentText;  
21.     }  
22.   
23.     public Bitmap getContentPicture() {  
24.         return contentPicture;  
25.     }  
26.   
27.     public void setContentPicture(Bitmap contentPicture) {  
28.         this.contentPicture = contentPicture;  
29.     }  
30.   
31.     @Override  
32.     public int describeContents() {  
33.         // TODO Auto-generated method stub  
34.         return 0;  
35.     }  
36.   
37.     @Override  
38.     public void writeToParcel(Parcel dest, int flags) {  
39.         // TODO Auto-generated method stub  
40.         dest.writeString(contentText);  
41.         if(this.contentPicture != null){  
42.             dest.writeInt(1);  
43.             this.contentPicture.writeToParcel(dest, flags);  
44.         }else{  
45.             dest.writeInt(0);  
46.         }  
47.     }  
48.   
49.     public static final Parcelable.Creator<WeiBoWidget> CREATOR = new Parcelable.Creator<WeiBoWidget>() {  
50.   
51.         @Override  
52.         public WeiBoWidget createFromParcel(Parcel source) {  
53.             // TODO Auto-generated method stub  
54.             WeiBoWidget weiBoWidget = new WeiBoWidget();  
55.             weiBoWidget.contentText = source.readString();  
56.             if(0 != source.readInt()){  
57.                 weiBoWidget.contentPicture = Bitmap.CREATOR.createFromParcel(source);//因为Bitmap实现了Parcelable接口，所以这里可以这样使用  
58.             }  
59.             return weiBoWidget;  
60.         }  
61.   
62.         @Override  
63.         public WeiBoWidget[] newArray(int size) {  
64.             // TODO Auto-generated method stub  
65.             return new WeiBoWidget[size];  
66.         }  
67.     };  
68.       
69. }  

package com.lewa; import android.graphics.Bitmap; import android.os.Parcel; import android.os.Parcelable; public class WeiBoWidget implements Parcelable{ private String contentText; private Bitmap contentPicture; public WeiBoWidget(){} public String getContentText() { return contentText; } public void setContentText(String contentText) { this.contentText = contentText; } public Bitmap getContentPicture() { return contentPicture; } public void setContentPicture(Bitmap contentPicture) { this.contentPicture = contentPicture; } @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.writeString(contentText); if(this.contentPicture != null){ dest.writeInt(1); this.contentPicture.writeToParcel(dest, flags); }else{ dest.writeInt(0); } } public static final Parcelable.Creator<WeiBoWidget> CREATOR = new Parcelable.Creator<WeiBoWidget>() { @Override public WeiBoWidget createFromParcel(Parcel source) { // TODO Auto-generated method stub WeiBoWidget weiBoWidget = new WeiBoWidget(); weiBoWidget.contentText = source.readString(); if(0 != source.readInt()){ weiBoWidget.contentPicture = Bitmap.CREATOR.createFromParcel(source);//因为Bitmap实现了Parcelable接口，所以这里可以这样使用 } return weiBoWidget; } @Override public WeiBoWidget[] newArray(int size) { // TODO Auto-generated method stub return new WeiBoWidget[size]; } }; }

2、使用Intent、Bundle进行传输

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1. Intent intent = new Intent();  
2.                 intent.setAction(GET_DATA_OVER);  
3.                 Bundle extra = new Bundle();  
4.                 extra.putParcelableArrayList("weiBoWidgets", (ArrayList<WeiBoWidget>) result);  
5.                 intent.putExtras(extra);  
6.                 context.sendBroadcast(intent);