我需要将自定义类的ArrayList从一个实体“转移”到另一个实体。我知道我需要实现Parcelable接口。ArrayList和Parcelable
这是我的自定义类。
public class cSportsList implements Parcelable {
boolean checked;
String name;
cSportsList(boolean check, String name_) {
checked = check;
name = name_;
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
//Non posso passare un booleano e non posso fare il cast boolean -> int
if (checked) {
dest.writeInt(1);
}
else dest.writeInt(0);
dest.writeString(name);
}
public static final Parcelable.Creator<cSportsList> CREATOR = new Parcelable.Creator<cSportsList>() {
public cSportsList createFromParcel(Parcel in) {
return new cSportsList(in);
}
public cSportsList[] newArray(int size) {
return new cSportsList[size];
}
};
private cSportsList(Parcel in) {
if (in.readInt() == 1) {
checked = true;
}
else {
checked = false;
}
name = in.readString();
}
}
这就是“从”
//This is sportsMap: ArrayList<cSportsList> sportsMap = new ArrayList<cSportsList>();
Intent intent = new Intent(getApplicationContext(),WhatSportActivity.class);
intent.putParcelableArrayListExtra("sportsMap", (ArrayList<? extends Parcelable>) sportsMap); //I have tried with ArrayList<cSportsList> too.
this.startActivity(intent);
在实体代码而这是实体代码“到”
final Intent srcIntent = getIntent();
ArrayList<cSportsList> sportsMap = srcIntent.getParcelableExtra("sportsMap");
的问题是:在实体“到” sportsMap为null。 如果我在“writeToParcel”和“cSportsList(Parcelable in)”函数中设置了“断点”,我发现这两个函数都执行了代码。
我的错误在哪里?
谢谢。 M.
用** getParcelableArrayListExtra **替换** getParcelableExtra **。 –