Question

我试图将额外内容从一个活动传递到另一个活动。我还有一个名为Objects的类，它包含附加内容的对象。

在我的第一次活动中，我写了这个：

 private OnClickListener top_listener = new OnClickListener() {
        public void onClick(View v) {
                    Intent top = new Intent(Main.this, TopProject.class);
                    Bundle b = new Bundle();
                    b.putParcelable("project_title", Objects);
                    startActivity(top);
        }
        };

但是这行有一个语法错误：b.putParcelable（“project_title”，Objects）;它说“对象”无法解析为变量。我应该先申报其他内容还是什么？谢谢

这是我的对象类：

public class Objects implements Parcelable{

   String project_title = "project title";
   String organization_title = "organization title";
   String keyword = "keyword";
   String short_code = "short code";
   String project_description = "description";
   String smallImageUrl = "smallImageUrl";
   String bigImageUrl = "bigImageUrl";
   String price= "price";
   String country= "country";


    public static ArrayList<Project> projectsList = new ArrayList<Project>();

    public Objects(String project_title, String organization_title, String keyword, String short_code, String project_description, String smallImageUrl, String bigImageUrl, String price, String country) {
        this.project_title = project_title;
        this.organization_title = organization_title;
        this.keyword = keyword;
        this.short_code = short_code;
        this.project_description = project_description;
        this.smallImageUrl = smallImageUrl;
        this.bigImageUrl = bigImageUrl;
        this.price = price;
        this.country = country;

    }

     private Objects(Parcel parcel) {
            project_title = parcel.readString();
            organization_title = parcel.readString();
            keyword = parcel.readString();
            short_code = parcel.readString();
            project_description = parcel.readString();
            smallImageUrl = parcel.readString();
            bigImageUrl = parcel.readString();
            price = parcel.readString();
            country = parcel.readString();
            //projectsList = parcel.readList();
        }

    public int describeContents() {

        return 0;
    }

    public void writeToParcel(Parcel parcel, int flags) {
        parcel.writeString(project_title);
        parcel.writeString(organization_title);
        parcel.writeString(keyword);
        parcel.writeString(short_code);
        parcel.writeString(project_description);
        parcel.writeString(smallImageUrl);
        parcel.writeString(bigImageUrl);
        parcel.writeString(price);
        parcel.writeString(country);
        parcel.writeList(projectsList);
    }

    public String getProjectTitle(){
        return project_title;
    }

    public String getOrganizationTitle(){
        return organization_title;
    }

    public String getProjectDescription(){
        return project_description;
    }

    public String getKeyword(){
        return keyword;
    }

    public String getShortcode(){
        return short_code;
    }

    public String getSmallImageUrl(){
        return smallImageUrl;
    }

    public String getBigImageUrl(){
        return bigImageUrl;
    }

    public String getPrice(){
        return price;
    }

    public String getCountry(){
        return country;
    }

    public void setProjectTitle(String project_title){
        this.project_title = project_title;
    }

    public void setOrganizationTitle(String organization_title){
        this.organization_title = organization_title;
    }

    public void setProjectDescription(String project_description){
        this.project_description = project_description;
    }

    public void setKeyword(String keyword){
        this.keyword = keyword;
    }

    public void setShortcode(String short_code){
        this.short_code = short_code;
    }

    public void setSmallImageUrl(String smallImageUrl){
        this.smallImageUrl = smallImageUrl;
    }

    public void setBigImageUrl(String bigImageUrl){
        this.bigImageUrl = bigImageUrl;
    }

    public void setPrice(String price){
        this.price = price;
    }

    public void setCountry(String country){
        this.country = country;
    }

    public static Creator<Objects> CREATOR
            = new Creator<Objects>() {
        public Objects createFromParcel(Parcel parcel) {
            return new Objects(parcel);
        }

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

Answer 1

b.putParcelable("project_title", Objects);

这意味着什么都没有。你必须提供你班级的实例。类似的东西：

b.putParcelable("project_title", new Objects());

Answer 2

如果它只是一个带有基元和Serializables的简单类，请使用Serializable，而不是Parcelable。它会让你的生活更轻松。传递的Objects对象也必须是一个实例，如其他答案中所述

e.g。

Objects object = new Objects(); //assuming Objects implements Serializable
bundle.putSerializable("blahblah", object);

Answer 3

你不能将“Oject”作为争论传递，因为它定义了类的名称。在那里提供该类的引用。

Android：传递Extras参数时出错

3 个答案: