帮助过的对象一个ArrayList到一个新的活动 [英] Help passing an ArrayList of Objects to a new Activity

问题描述

我有对象的ArrayList。即ArrayList中。

我想通过这一个新的活动。我试图用putParcelableArrayList，但它具有与对象的问题。我删除了部分自变量的创建和方法的工作，但后来我得到eciplse抱怨不安全的东西。

我如何通过此ArrayList到一个新的活动

感谢您的时间

修改 我想这样的：

 的ArrayList＆LT;的ObjectName＆GT; ArrayList的=新的ArrayList＆LT;的ObjectName＆GT;（）;
束束=新包（）;
bundle.putParcelableArrayList（数组列表，ArrayList的）;
 

我收到以下错误：

 的方法putParcelableArrayList（字符串，ArrayList的＆LT ;?延伸Parcelable＆GT;）的类型包不适用的参数（字符串，ArrayList的＆LT;的ObjectName＆GT;）
 

EDIT2 对象的实例code。我需要改变本作paracbale工作？

 公共类的ObjectName {
    私人诠释值1;
    私人诠释值2;
    私人诠释值3;

    公众的ObjectName（INT pValue1，诠释pValue2，INT值3）{
        值1 = pValue1;
        值2 = pValue2;
        值3 = pValue3;
    }

    //获取报表下面每个值
    公众诠释getValue1（）{
        返回值1;
    }
    // 等等
 

解决方案

您的对象类应该实现parcelable。在code以下应该让你开始。

 公共类的ObjectName实现Parcelable {

    //您现有的code

        公众的ObjectName（包裹中）{
            超（）;
            readFromParcel（在）;
        }

        公共静态最终Parcelable.Creator＆LT;的ObjectName＆GT; CREATOR =新Parcelable.Creator＆LT;的ObjectName＆GT;（）{
            公众的ObjectName createFromParcel（包裹中）{
                返回新的ObjectName（中）;
            }

            公众的ObjectName [] newArray（INT尺寸）{

                返回新的ObjectName【尺寸】;
            }

        };

        公共无效readFromParcel（包裹中）{
          值1 = in.readInt（）;
          值2 = in.readInt（）;
          值3 = in.readInt（）;

        }
        公众诠释describeContents（）{
            返回0;
        }

        公共无效writeToParcel（包裹DEST，INT标志）{
            dest.writeInt（值1）;
            dest.writeInt（值2）;
            dest.writeInt（值3）;
       }
    }
 

要使用上述做到这一点：

在'送'活动中使用：

 的ArrayList＆LT;的ObjectName＆GT; ArrayList的=新的ArrayList＆LT;的ObjectName＆GT;（）;
束束=新包（）;
bundle.putParcelableArrayList（数组列表，ArrayList的）;
 

在'接收'活动中使用：

 捆绑额外= getIntent（）getExtras（）。
ArrayList的＆LT;的ObjectName＆GT; ArrayList的= extras.getParcelableArrayList（数组列表）;
的ObjectName object1 = ArrayList的[0];
 

等等。

I have an arraylist of objects. ie ArrayList.

I want to pass this to a new Activity. I tried to use putParcelableArrayList but it has issues with the object. I removed the part from the creating of the variable and the method works but then I get eciplse complaining about unsafe stuff.

How do I pass this arrayList to a new Activity

Thanks for your time

EDIT I tried this :

ArrayList<ObjectName> arraylist = new Arraylist<ObjectName>();
Bundle bundle = new Bundle();
bundle.putParcelableArrayList("arraylist", arraylist);

I get the following Error:

The method putParcelableArrayList(String, ArrayList<? extends Parcelable>) in the type Bundle is not applicable for the arguments (String, ArrayList<ObjectName>)

EDIT2 Object Example Code. Do I need to changed this for paracbale to work?

public class ObjectName {
    private int Value1;
    private int Value2;
    private int Value3;

    public ObjectName (int pValue1, int pValue2, int Value3) {
        Value1 = pValue1;
        Value2 = pValue2;
        Value3 = pValue3;
    }

    // Get Statements for each value below
    public int getValue1() {
        return Value1;
    } 
    // etc

解决方案

Your object class should implement parcelable. The code below should get you started.

    public class ObjectName implements Parcelable {

    // Your existing code

        public ObjectName(Parcel in) {
            super(); 
            readFromParcel(in);
        }

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

            public ObjectName[] newArray(int size) {

                return new ObjectName[size];
            }

        };

        public void readFromParcel(Parcel in) {
          Value1 = in.readInt();
          Value2 = in.readInt();
          Value3 = in.readInt();

        }
        public int describeContents() {
            return 0;
        }

        public void writeToParcel(Parcel dest, int flags) {
            dest.writeInt(Value1);
            dest.writeInt(Value2);  
            dest.writeInt(Value3);
       }
    }

To use the above do this:

In 'sending' activity use:

ArrayList<ObjectName> arraylist = new Arraylist<ObjectName>();  
Bundle bundle = new Bundle();  
bundle.putParcelableArrayList("arraylist", arraylist);

In 'receiving' activity use:

Bundle extras = getIntent().getExtras();  
ArrayList<ObjectName> arraylist  = extras.getParcelableArrayList("arraylist");  
ObjectName object1 = arrayList[0];

and so on.

这篇关于帮助过的对象一个ArrayList到一个新的活动的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！