Android中Parcelable接口的使用

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：
                    publicclassDownloadItemimplementsParcelable{
            
            privateStringurl;
            privateStringgameName;
            privateStringgamePkgName;
            privateinttotal_bytes;
            privateintcurrent_bytes;
            privateStringpath;
            publicDownloadItem(){};
            
            publicDownloadItem(Stringurl,StringgameName,StringgamePkgName,
            inttotal_bytes,intcurrent_bytes,Stringpath){
            super();
            this.url=url;
            this.gameName=gameName;
            this.gamePkgName=gamePkgName;
            this.total_bytes=total_bytes;
            this.current_bytes=current_bytes;
            this.path=path;
            }
            
            @Override
            publicStringtoString(){
            return"DownloadItem[url="+url+",gameName="+gameName
            +",gamePkgName="+gamePkgName+",total_bytes="
            +total_bytes+",current_bytes="+current_bytes+",path="
            +path+"]";
            }
            
            publicStringgetUrl(){
            
            returnurl;
            }
            
            publicvoidsetUrl(Stringurl){
            this.url=url;
            }
            
            publicStringgetGameName(){
            returngameName;
            }
            
            publicvoidsetGameName(StringgameName){
            this.gameName=gameName;
            }
            
            publicStringgetGamePkgName(){
            returngamePkgName;
            }
            
            publicvoidsetGamePkgName(StringgamePkgName){
            this.gamePkgName=gamePkgName;
            }
            
            publicintgetTotal_bytes(){
            returntotal_bytes;
            }
            
            publicvoidsetTotal_bytes(inttotal_bytes){
            this.total_bytes=total_bytes;
            }
            
            publicintgetCurrent_bytes(){
            returncurrent_bytes;
            }
            
            publicvoidsetCurrent_bytes(intcurrent_bytes){
            this.current_bytes=current_bytes;
            }
            
            publicStringgetPath(){
            returnpath;
            }
            
            publicvoidsetPath(Stringpath){
            this.path=path;
            }
            
            @Override
            publicintdescribeContents(){
            //TODOAuto-generatedmethodstub
            return0;
            }
            
            @Override
            publicvoidwriteToParcel(Parceldest,intflags){
            
            
            dest.writeString(this.url);
            dest.writeString(this.gameName);
            dest.writeString(this.gamePkgName);
            dest.writeInt(this.total_bytes);
            dest.writeInt(this.current_bytes);
            dest.writeString(this.path);
            }
            
            publicstaticfinalParcelable.Creator<DownloadItem>CREATOR=newParcelable.Creator<DownloadItem>(){
            
            @Override
            publicDownloadItemcreateFromParcel(Parcelsource){
            returnnewDownloadItem(source.readString(),source.readString(),source.readString(),source.readInt(),source.readInt(),source.readString());
            }
            
            @Override
            publicDownloadItem[]newArray(intsize){
            returnnewDownloadItem[size];
            }
            };
            }
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