Android实现Parcelables时，用integer报错

最近在写Android程序，当我实现了一个Draginfo类，继承Parcelable接口，Draginfo类有个属性id，类型为Integer，在writeToParcel调用用dest.writeInt(id)，代码如下：

package edu.whu.sc.crawler.Disease;

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

public class Draginfo implements Parcelable {

	//设置为Integer则在后续将ArrayList<Draginfo>对象放入intent，传递给下一个activity时报错
	private int id;
	private String name;
	private String nameused;
	private String nameused1;
	private String nameused3;
	private String nameused2;
	private String form;
	private String standard;
	private String indication;
	private String specification;
	private String reaction;
	private String other;
	private String other1;

	public Draginfo() {
	}

	public Draginfo(String name, String nameused, String nameused1,
			String nameused3, String nameused2, String form, String standard,
			String indication, String specification, String reaction,
			String other, String other1) {
		this.name = name;
		this.nameused = nameused;
		this.nameused1 = nameused1;
		this.nameused3 = nameused3;
		this.nameused2 = nameused2;
		this.form = form;
		this.standard = standard;
		this.indication = indication;
		this.specification = specification;
		this.reaction = reaction;
		this.other = other;
		this.other1 = other1;
	}

	public int getId() {
		return this.id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getName() {
		return this.name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getNameused() {
		return this.nameused;
	}

	public void setNameused(String nameused) {
		this.nameused = nameused;
	}

	public String getNameused1() {
		return this.nameused1;
	}

	public void setNameused1(String nameused1) {
		this.nameused1 = nameused1;
	}

	public String getNameused3() {
		return this.nameused3;
	}

	public void setNameused3(String nameused3) {
		this.nameused3 = nameused3;
	}

	public String getNameused2() {
		return this.nameused2;
	}

	public void setNameused2(String nameused2) {
		this.nameused2 = nameused2;
	}

	public String getForm() {
		return this.form;
	}

	public void setForm(String form) {
		this.form = form;
	}

	public String getStandard() {
		return this.standard;
	}

	public void setStandard(String standard) {
		this.standard = standard;
	}

	public String getIndication() {
		return this.indication;
	}

	public void setIndication(String indication) {
		this.indication = indication;
	}

	public String getSpecification() {
		return this.specification;
	}

	public void setSpecification(String specification) {
		this.specification = specification;
	}

	public String getReaction() {
		return this.reaction;
	}

	public void setReaction(String reaction) {
		this.reaction = reaction;
	}

	public String getOther() {
		return this.other;
	}

	public void setOther(String other) {
		this.other = other;
	}

	public String getOther1() {
		return this.other1;
	}

	public void setOther1(String other1) {
		this.other1 = other1;
	}
	
	@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.writeInt(id);
		dest.writeString(name);
		dest.writeString(nameused);
		dest.writeString(nameused1);
		dest.writeString(nameused2);
		dest.writeString(nameused3);
		dest.writeString(form);
		dest.writeString(standard);
		dest.writeString(indication);
		dest.writeString(specification);
		dest.writeString(reaction);
		dest.writeString(other);
		dest.writeString(other1);
		
	}
		
	public static final Parcelable.Creator<Draginfo> CREATOR = new Creator<Draginfo>() {

		@Override
		public Draginfo createFromParcel(Parcel source) {
			// TODO Auto-generated method stub
			Draginfo draginfo = new Draginfo();
			draginfo.id = source.readInt();
			draginfo.name = source.readString();
			draginfo.nameused1 = source.readString();
			draginfo.nameused2 = source.readString();
			draginfo.nameused3 = source.readString();
			draginfo.form = source.readString();
			draginfo.standard = source.readString();
			draginfo.indication = source.readString();
			draginfo.specification = source.readString();
			draginfo.reaction = source.readString();
			draginfo.other = source.readString();
			draginfo.other1 = source.readString();
			
			return draginfo;
		}

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

若我用Integer类型来设置id，则我在后面调用intent,将一个Arraylist<Draginfo>放入bundle里，再将bundle放入intent，则会报错。代码如下，其中bundle里面用bundle.putParcelableArrayList()放入了一个ArrayList<Draginfo>对象。

private void startShowActivity(Bundle bundle) {
		Intent intent = new Intent(getActivity(), ShowDrugInfoActivity.class);
		intent.putExtra("DragInfo", bundle);//这里会报错
		startActivity(intent);
	}