java - 发送到 Android 中的另一个 fragment 后， bundle 对象显示 null

Question

我正在开发android应用程序。我将Fragment类扩展到我的应用程序中的所有java类。我想将数据从 fragment 发送到另一个 fragment (AllDeals-> CarDetails)。为了发送数据，我创建parcelable类对象并发送该对象到另一个 fragment 。但在新 fragment 中它总是显示空数据。我尝试了很多时间，但没有成功。我已经在这方面浪费了很多时间，所以我决定发布一个问题。所以我请求你解决我的问题。我像这样初始化 CarBean

 obj = new CarBean();
        obj.setName("deepak");
        obj.setPrize(txt_carprize.getText().toString());
        obj.setAvgPrize(txt_vat.getText().toString());
        obj.setImage("R.drawable.img"+currentposition);

这是我的代码

 public class AllDeals extends BaseFragment implements OnClickListener 
{
     android.support.v4.app.FragmentManager fragmentManager = getFragmentManager();
     android.support.v4.app.FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
     BaseFragment fragment = new AllDeals();
    bundle.putParcelable("cardetails", obj);
    fragment.setArguments(bundle);

    fragmentTransaction.commit();
    }

这个类我读了Bundled object

public class CarDetails extends BaseFragment implements OnClickListener
{
 Bundle bundledata=getArguments();
 CarBean carbean=bundledata.getParcelable("cardetails");
 String name=carbean.getName();
}

这是 Java Bean 类

public class CarBean implements Parcelable
{
    String name,prize,avgprize,image;



     public  CarBean(Parcel in)
        {
            name=in.readString();
            prize=in.readString();
            avgprize=in.readString();
            image=in.readString();
        }
    public CarBean() 
    {
        // TODO Auto-generated constructor stub
    }
    public void setName(String name)
    {
        this.name=name;
    }
    public String getName()
    {
        return name;
    }

    public void setPrize(String prize)
    {
        this.prize=prize;
    }
    public String getPrize()
    {
        return prize;
    }
    public void  setAvgPrize(String avgprize)
    {
        this.avgprize=avgprize;
    }

    public String getAvgPrize()
    {
        return avgprize;
    }

    public void setImage(String image)
    {
        this.image=image;

    }

    public String getImage()
    {
        return  image;
    }

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

    /*
     here we store the data into parcle object

     */
    @Override
    public void writeToParcel(Parcel out, int flags) 
    {
        // TODO Auto-generated method stub
        out.writeString(name);
        out.writeString(prize);
        out.writeString(avgprize);
        out.writeString(image);
    }


    /*  retrive the data from  parcel object */






    public static final Parcelable.Creator<CarBean> CREATOR = new Parcelable.Creator<CarBean>() 
            {

                @Override
                public CarBean createFromParcel(Parcel in) 
                {
                    // TODO Auto-generated method stub
                    /* this method  call CarBean Constructor */

                    return new CarBean(in);
                }

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

Answer 1

在此之前打印/记录您的obj

bundle.putParcelable("cardetails", obj);

确保它不为空。