如何使用 ArrayList<Parcelable> 正确实现 Parcelable? [英] how to properly implement Parcelable with an ArrayList<Parcelable>?
问题描述
我在制作我的课程 Parcelable
时遇到问题.问题是,我试图将类中的成员写入包裹中,该成员是 ArrayList
对象.ArrayList
是Serializable
,列表中的对象(ZigBeeDev
)是Parcelable
.
I am having trouble making my class Parcelable
. The trouble is, I am trying to write to the parcel a member in the class which is an ArrayList<Parcelable>
object. The ArrayList
is Serializable
, and the objects (ZigBeeDev
) in the list are Parcelable
.
相关代码如下:
package com.gnychis.coexisyst;
import java.util.ArrayList;
import java.util.Iterator;
import android.os.Parcel;
import android.os.Parcelable;
public class ZigBeeNetwork implements Parcelable {
public String _mac; // the source address (of the coordinator?)
public String _pan; // the network address
public int _band; // the channel
ArrayList<Integer> _lqis; // link quality indicators (to all devices?)
ArrayList<ZigBeeDev> _devices; // the devices in the network
public void writeToParcel(Parcel out, int flags) {
out.writeString(_mac);
out.writeString(_pan);
out.writeInt(_band);
out.writeSerializable(_lqis);
out.writeParcelable(_devices, 0); // help here
}
private ZigBeeNetwork(Parcel in) {
_mac = in.readString();
_pan = in.readString();
_band = in.readInt();
_lqis = (ArrayList<Integer>) in.readSerializable();
_devices = in.readParcelable(ZigBeeDev.class.getClassLoader()); // help here
}
public int describeContents() {
return this.hashCode();
}
public static final Parcelable.Creator<ZigBeeNetwork> CREATOR =
new Parcelable.Creator<ZigBeeNetwork>() {
public ZigBeeNetwork createFromParcel(Parcel in) {
return new ZigBeeNetwork(in);
}
public ZigBeeNetwork[] newArray(int size) {
return new ZigBeeNetwork[size];
}
};
//...
}
我已经标记了两个点//help here"以了解如何正确写入包裹以及如何重建它.如果 ZigBeeDev
是 Parcelable
(正确测试),我该如何正确执行此操作?
I have marked two spots "// help here" to understand how to properly write to the parcel and how to reconstruct it. If ZigBeeDev
is Parcelable
(properly tested), how do I do this properly?
推荐答案
你差点就搞定了!
你只需要:
public void writeToParcel(Parcel out, int flags) {
out.writeString(_mac);
out.writeString(_pan);
out.writeInt(_band);
out.writeSerializable(_lqis);
out.writeTypedList(_devices);
}
private ZigBeeNetwork(Parcel in) {
_mac = in.readString();
_pan = in.readString();
_band = in.readInt();
_lqis = (ArrayList<Integer>) in.readSerializable();
in.readTypedList(_devices, ZigBeeDev.CREATOR);
}
仅此而已!
对于你的整数列表,你也可以这样做:
For your list of Integer, you can also do :
out.writeList(_lqis);
_lqis = new ArrayList<>();
in.readList(_lqis Integer.class.getClassLoader());
它应该可以工作.
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