您 DoctorObject＃writeToParcel（）不能为空，这实际上是复制对象数据的内容。

You can't have DoctorObject#writeToParcel() empty, that is what actually copies the object data.

@Override
public void writeToParcel(Parcel dest, int flags) {
    // the order you write to the Parcel has to be the same order you read from the Parcel
    dest.writeInt(DocPic);
    dest.writeString(Docname);
    dest.writeString(Docspecialty);
    dest.writeString(DocLocation);
}

要在其他活动中读回数据，请使用 getParcelableArrayListExtra

And to read back your data in the other activity, use getParcelableArrayListExtra

ArrayList<DoctorObject> list = b.getParcelableArrayListExtra("NAME");