Bundle携带List传递

最新推荐文章于 2024-01-12 14:07:00 发布

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最新推荐文章于 2024-01-12 14:07:00 发布

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本文介绍了如何使用Parcelable接口将List对象通过Bundle在Android中传递。首先，实现Parcelable接口并重写相关方法，然后创建Parcelable.Creator，接着在构造函数中解析Parcel数据。最后，将序列化的List放入Bundle，并在接收方取出。

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使用Bundle携带对象传递数据
1. 将数据序列化实现 Parcelable 接口，重写方法describeContents返回默认数值 0即可，重写writeToParcel(Parcel out, int flags) 方法将数据 out.writeString(pics)，数据顺序要相同不能乱
2. 添加这一部分方法 public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {
public FriendList createFromParcel(Parcel in) {
return new FriendList(in);
}

    public FriendList[] newArray(int size) {
        return new FriendList[size];
    }
};

3. 构造这个方法 private FriendList(Parcel in) {
this.pics = in.readString();
this.names = in.readString();
this.infos = in.readString();
this.sortletterss = in.readString();
this.id = in.readString();
}
4.序列化完成
5.传递Bundle类型数据

undle bundle = new Bundle();
bundle.putParcelableArrayList(“selectfriendLists”, selectfriendLists);
6.接收数据
Bundle bundle = getIntent().getExtras();
if(!bundle.isEmpty() && bundle!=null){

    ArrayList<FriendList> selectFriend = bundle.getParcelableArrayList("selectfriendLists");
    }

7。对象的序列化如下

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

public class FriendList implements Parcelable {

private String pics;
private String names;
private String infos;
private String sortletterss;
private String id;

public String getId() {
    return id;
}

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

public String getPics() {
    return pics;
}

public void setPics(String pics) {
    this.pics = pics;
}

public String getNames() {
    return names;
}

public void setNames(String names) {
    this.names = names;
}

public String getInfos() {
    return infos;
}

public void setInfos(String infos) {
    this.infos = infos;
}

public String getSortletterss() {
    return sortletterss;
}

public void setSortletterss(String sortletterss) {
    this.sortletterss = sortletterss;
}

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

@Override
public void writeToParcel(Parcel out, int flags) {
    // TODO Auto-generated method stub
    out.writeString(pics);
    out.writeString(names);
    out.writeString(infos);
    out.writeString(sortletterss);
    out.writeString(id);
}

public static final Parcelable.Creator<FriendList> CREATOR = new Parcelable.Creator<FriendList>() {
    public FriendList createFromParcel(Parcel in) {
        return new FriendList(in);
    }

    public FriendList[] newArray(int size) {
        return new FriendList[size];
    }
};

private FriendList(Parcel in) {
    this.pics = in.readString();
    this.names = in.readString();
    this.infos = in.readString();
    this.sortletterss = in.readString();
    this.id = in.readString();
}

public FriendList() {
    super();
}

public FriendList(String pics, String names, String infos, String sortletterss, String id) {
    super();
    this.pics = pics;
    this.names = names;
    this.infos = infos;
    this.sortletterss = sortletterss;
    this.id = id;
}

}