本文介绍了在android系统实现Parcelable时出错的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

下面的类实现Parcelable类

 包mobile.bh.classes;进口的java.util.ArrayList;
进口的java.util.List;进口mobile.bh.activities.MethodStep;
进口android.content.Context;
进口android.graphics.Bitmap;
进口android.os.Parcel;
进口android.os.Parcelable;//简单的类,只是有一个成员属性为例
公共类配方实现Parcelable {
    公众诠释身份证;
    公共字符串名称;
    公开名单<性成分GT;成分;
    公开名单< MethodStep>方法;
    公共字符串评论;
    公共字符串形象;
    公共位图图像2;
    上下文mContext;    公开配方(上下文C){
        mContext = C;
    }
    / *下面的一切这里是实现Parcelable * /
    公众诠释describeContents(){
        返回0;
    }    //写对象的数据传入的包裹
    公共无效writeToParcel(包裹出来,诠释标志){
        out.writeInt(ID);
        out.writeString(名);
        out.writeList(成分);
        out.writeList(方法);
        out.writeString(注解);
        out.writeString(图片);
    }    //这是用来重新生成对象。所有Parcelables并必须有一个实现这两种方法CREATOR
    公共静态最终Parcelable.Creator<&配方GT; CREATOR =新Parcelable.Creator<&配方GT;(){
        公共配方createFromParcel(包裹中){
            返回新配方(以);
        }        公共食谱[] newArray(INT大小){
            返回新配方【尺寸】;
        }
    };
    //例如构造函数地块,并为您填充它的值的对象
    私人配方(包裹中){
        ID = in.readInt();
        名称= in.readString();
        配料=(ArrayList的<性成分GT;)in.readSerializable();
        方法=(ArrayList的< MethodStep>)in.readSerializable();
        注释= in.readString();
        图像= in.readString();
    }
}

但我得到以下错误,当它读名称

  09-03 16:15:35.364:E / AndroidRuntime(330):了java.lang.RuntimeException:致Parcelable遇到IOException异常读取序列化对象(名称=)
09-03 16:15:35.364:E / AndroidRuntime(330):在android.os.Parcel.readSerializable(Parcel.java:2022)
。09-03 16:15:35.364:E / AndroidRuntime(330):在mobile.bh.classes.Recipe<&初始化GT;(Recipe.java:61)
。09-03 16:15:35.364:E / AndroidRuntime(330):在mobile.bh.classes.Recipe<&初始化GT;(Recipe.java:56)
09-03 16:15:35.364:E / AndroidRuntime(330):在mobile.bh.classes.Recipe $ 1.createFromParcel(Recipe.java:48)
09-03 16:15:35.364:E / AndroidRuntime(330):在mobile.bh.classes.Recipe $ 1.createFromParcel(Recipe.java:1)
09-03 16:15:35.364:E / AndroidRuntime(330):在android.os.Parcel.readParcelable(Parcel.java:1981)
09-03 16:15:35.364:E / AndroidRuntime(330):在android.os.Parcel.readValue(Parcel.java:1846)
09-03 16:15:35.364:E / AndroidRuntime(330):在android.os.Parcel.readListInternal(Parcel.java:2092)
09-03 16:15:35.364:E / AndroidRuntime(330):在android.os.Parcel.readArrayList(Parcel.java:1536)
09-03 16:15:35.364:E / AndroidRuntime(330):在android.os.Parcel.readValue(Parcel.java:1867)
09-03 16:15:35.364:E / AndroidRuntime(330):在android.os.Parcel.readMapInternal(Parcel.java:2083)
09-03 16:15:35.364:E / AndroidRuntime(330):在android.os.Bundle.unparcel(Bundle.java:208)
09-03 16:15:35.364:E / AndroidRuntime(330):在android.os.Bundle.getParcelableArrayList(Bundle.java:1144)
09-03 16:15:35.364:E / AndroidRuntime(330):在android.content.Intent.getParcelableArrayListExtra(Intent.java:3448)
09-03 16:15:35.364:E / AndroidRuntime(330):在mobile.bh.activities.RecipeInfoActivity.onCreate(RecipeInfoActivity.java:56)
09-03 16:15:35.364:E / AndroidRuntime(330):在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
09-03 16:15:35.364:E / AndroidRuntime(330):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)


解决方案

当您使用

  out.writeList(成分);
    out.writeList(方法);

要写入数据到地块,你应该使用

  =成分in.readList();
    方法= in.readList();

阅读。而不是 readSerializable()

好运气

The following class implements Parcelable class

package mobile.bh.classes;

import java.util.ArrayList;
import java.util.List;

import mobile.bh.activities.MethodStep;
import android.content.Context;
import android.graphics.Bitmap;
import android.os.Parcel;
import android.os.Parcelable;

//simple class that just has one member property as an example
public class Recipe implements Parcelable {
    public int id;
    public String name;
    public List<Ingredient> ingredients;
    public List<MethodStep> method;
    public String comment;
    public String image;
    public Bitmap image2;
    Context mContext;



    public Recipe(Context c){
        mContext = c;
    }
    /* everything below here is for implementing Parcelable */
    public int describeContents() {
        return 0;
    }

    // write your object's data to the passed-in Parcel
    public void writeToParcel(Parcel out, int flags) {
        out.writeInt(id);
        out.writeString(name);
        out.writeList(ingredients);
        out.writeList(method);
        out.writeString(comment);
        out.writeString(image);
    }

    // this is used to regenerate your object. All Parcelables must have a CREATOR that implements these two methods
    public static final Parcelable.Creator<Recipe> CREATOR = new Parcelable.Creator<Recipe>() {
        public Recipe createFromParcel(Parcel in) {
            return new Recipe(in);
        }

        public Recipe[] newArray(int size) {
            return new Recipe[size];
        }
    };
    // example constructor that takes a Parcel and gives you an object populated with it's values
    private Recipe(Parcel in) {
        id = in.readInt();
        name =in.readString();
        ingredients = (ArrayList<Ingredient>)in.readSerializable();
        method = (ArrayList<MethodStep>)in.readSerializable();
        comment = in.readString();
        image = in.readString();
    }
}

But I got the following error when it reads name :

09-03 16:15:35.364: E/AndroidRuntime(330): Caused by: java.lang.RuntimeException: Parcelable encountered IOException reading a Serializable object (name = )
09-03 16:15:35.364: E/AndroidRuntime(330):  at android.os.Parcel.readSerializable(Parcel.java:2022)
09-03 16:15:35.364: E/AndroidRuntime(330):  at mobile.bh.classes.Recipe.<init>(Recipe.java:61)
09-03 16:15:35.364: E/AndroidRuntime(330):  at mobile.bh.classes.Recipe.<init>(Recipe.java:56)
09-03 16:15:35.364: E/AndroidRuntime(330):  at mobile.bh.classes.Recipe$1.createFromParcel(Recipe.java:48)
09-03 16:15:35.364: E/AndroidRuntime(330):  at mobile.bh.classes.Recipe$1.createFromParcel(Recipe.java:1)
09-03 16:15:35.364: E/AndroidRuntime(330):  at android.os.Parcel.readParcelable(Parcel.java:1981)
09-03 16:15:35.364: E/AndroidRuntime(330):  at android.os.Parcel.readValue(Parcel.java:1846)
09-03 16:15:35.364: E/AndroidRuntime(330):  at android.os.Parcel.readListInternal(Parcel.java:2092)
09-03 16:15:35.364: E/AndroidRuntime(330):  at android.os.Parcel.readArrayList(Parcel.java:1536)
09-03 16:15:35.364: E/AndroidRuntime(330):  at android.os.Parcel.readValue(Parcel.java:1867)
09-03 16:15:35.364: E/AndroidRuntime(330):  at android.os.Parcel.readMapInternal(Parcel.java:2083)
09-03 16:15:35.364: E/AndroidRuntime(330):  at android.os.Bundle.unparcel(Bundle.java:208)
09-03 16:15:35.364: E/AndroidRuntime(330):  at android.os.Bundle.getParcelableArrayList(Bundle.java:1144)
09-03 16:15:35.364: E/AndroidRuntime(330):  at android.content.Intent.getParcelableArrayListExtra(Intent.java:3448)
09-03 16:15:35.364: E/AndroidRuntime(330):  at mobile.bh.activities.RecipeInfoActivity.onCreate(RecipeInfoActivity.java:56)
09-03 16:15:35.364: E/AndroidRuntime(330):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
09-03 16:15:35.364: E/AndroidRuntime(330):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
解决方案

When you use

    out.writeList(ingredients);
    out.writeList(method);

To write data to Parcel, you should use

    ingredients = in.readList();
    method = in.readList();

to read it. And not readSerializable()

Good luck

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08-14 02:15