Android Parcelable可从阵列中获取无限大的物品，直至OOM

我正在使用Parcelable在片段之间进行通信。一切都很好，但有时当Android关闭应用程序进程以释放内存，用户返回应用程序时，包裹会从数组中获取大量项目，比如数百万个项目，而不是2-3个项目，当然它会抛出OOM。 我想造物主出了点问题，但我无法处理。 parcelable的代码由super类、child类和my Interest item类组成：

基类：

 public abstract class BaseRs implements Parcelable {

private String token;
private String msgAlert;
private String simpleMsg;
private AdsObj adsObj;    
private Map<String, String> mapSettings;

//getters & setters

public BaseRs() {
}


protected BaseRs(Parcel in) {
    token = in.readString();
    msgAlert = in.readString();
    simpleMsg = in.readString();
    adsObj = in.readParcelable(AdsObj.class.getClassLoader());
    mapSettings = MapParcelable.readParcelable(in);
}

@Override
public void writeToParcel(Parcel dest, int flags) {
    dest.writeString(token);
    dest.writeString(msgAlert);
    dest.writeString(simpleMsg);
    dest.writeParcelable(adsObj, flags);
    MapParcelable.writeToParcel(dest, mapSettings);
 }

}

---

我认为问题在于，如果地图为空，您就不会将大小字段写入地块，但当您读取它时，您总是读取大小字段，它可能会读取一些随机值。或者你把代码改成

if (map != null) {
    out.writeInt(map.size());
    for (Map.Entry<String, String> entry : map.entrySet()) {
        out.writeString(entry.getKey());
        out.writeString(entry.getValue());
    }
}else{
    out.writeInt(0);
}

if（map！=null）{
out.writeInt（map.size（））；
对于（Map.Entry:Map.entrySet（））{
out.writeString（entry.getKey（））；
out.writeString（entry.getValue（））；
}
}否则{
out.writeInt（0）；
}

---

在重新创建类时，您永远不会得到空值，或者您创建了另一个布尔字段“hasMap”，并始终写入该字段

什么是AdsObj？它是一个与

SaleCoinItem

完全相同的对象-与此用例无关MapParcelable呢？@lelloman我刚刚更新了我的问题，这里的问题可能是erroryep，就这样，你的解决方案正在发挥作用。同时，我发现了另一种方法，使用serializable for Map；）我通常只用这个来实现包裹，很方便

public class SaleCoinItem implements Parcelable {

private int amount;
private double price;
private int sortOrder;

//getters & setters

protected SaleCoinItem(Parcel in) {
    amount = in.readInt();
    price = in.readDouble();
    sortOrder = in.readInt();
}

@Override
public void writeToParcel(Parcel dest, int flags) {
    dest.writeInt(amount);
    dest.writeDouble(price);
    dest.writeInt(sortOrder);
}

@Override
public int describeContents() {
    return 0;
}

public static final Creator<SaleCoinItem> CREATOR = new Creator<SaleCoinItem>() {
    @Override
    public SaleCoinItem createFromParcel(Parcel in) {
        return new SaleCoinItem(in);
    }

    @Override
    public SaleCoinItem[] newArray(int size) {
        return new SaleCoinItem[size];


       }
    };
}

public class MapParcelable {

public static void writeToParcel(Parcel out, Map<String, String> map) {
    if (map != null) {
        out.writeInt(map.size());
        for (Map.Entry<String, String> entry : map.entrySet()) {
            out.writeString(entry.getKey());
            out.writeString(entry.getValue());
        }
    }
}

public static Map<String, String> readParcelable(Parcel parcel) {
    Map<String, String> map = new HashMap<String, String>();
    int size = parcel.readInt();
    for (int i = 0; i < size; i++) {
        String key = parcel.readString();
        String value = parcel.readString();
        map.put(key, value);
    }

    return map;


   }

}

GetSalesItemsRs mGetSalesItemsRs = getArguments().getParcelable(KEY_PARCEL);

if (map != null) {
    out.writeInt(map.size());
    for (Map.Entry<String, String> entry : map.entrySet()) {
        out.writeString(entry.getKey());
        out.writeString(entry.getValue());
    }
}else{
    out.writeInt(0);
}