[英]Android serialization - java deserialization
I'm having some trouble with sending an Object from my Android app to my Java application. 我在将Android应用程序中的Object发送到Java应用程序时遇到了一些麻烦。 I have a serializable class that's exactly the same.
我有一个完全相同的可序列化类。
It works perfectly when I send the object from one java appliction to another one using this code on the receiver side: 当我使用接收器端的代码将对象从一个java应用程序发送到另一个java应用程序时,它工作正常:
@Override
public void run() {
super.run();
while(true){
try{
if(datagramSocket!=null)datagramSocket.close();
datagramSocket = new DatagramSocket(PORT);
buffer = new byte[4096];
inPacket = new DatagramPacket(buffer, buffer.length);
datagramSocket.receive(inPacket);
InetAddress clientAddress = inPacket.getAddress();
int clientPort = inPacket.getPort();
ByteArrayInputStream bais = new ByteArrayInputStream(buffer);
ObjectInputStream ois = new ObjectInputStream(new BufferedInputStream(bais));
Song song = (Song) ois.readObject();
song.setClientIP(inPacket.getAddress());
dc.addSong(song);
datagramSocket.close();
}catch (IOException e) {
System.out.println("IOException on receiving song: " + e);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
but when I try to do the same in android (so sending the Song-object from android to java) I'm getting a ClassCastException: 但是当我尝试在android中做同样的事情时(所以将Song-object从android发送到java)我得到了一个ClassCastException:
[Lcom.audiobuddy.serializables.Song; cannot be cast to com.audiobuddy.serializables.Song
First I thought it was because the package name was different, so I changed it on both sides to "com.audiobuddy.serializables". 首先我认为这是因为包名称不同,所以我在两边都改为“com.audiobuddy.serializables”。 But I look at my error, the Android app, changes the package adding "[L" in front and ";"
但我看看我的错误,Android应用程序,更改包“前面加”[L“和”;“ in the back...
在后面...
On both sides the Song-classes have the same serialVersionUID 在两侧,Song-class具有相同的serialVersionUID
The error message says that you try to cast Song[] ( [L(...)Song
means an array of Song) to a Song. 错误消息表示您尝试将Song [](
[L(...)Song
表示乐曲数组)转换为乐曲。
You should probably change your ois.readObject();
你应该改变你的
ois.readObject();
-line with something like this: -line与这样的事情:
Song[] songs = (Song[]) ois.readObject();
Song song = songs[0];
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