签名在Alljoyn框架上获取错误？ [英] signature get error on Alljoyn framework?

问题描述

我正在使用Android应用程序使用Alljoyn框架，并且遇到了一些问题

i'm working Android App use Alljoyn framework and i have some prolem

我有一个自定义对象

public class Package implements BusObject {


    public static enum DataSendType {
        TEXT,IMAGE
    }

    public static enum PackageStatus {
        NONE, SENDING, DONE
    }

    @Signature("s")
    private String m_id;
    @Signature("a")
    private ArrayList<DataPackage> m_listPackage;
    @Signature("r")
    private PackageStatus m_status;
    @Signature("r")
    private DataSendType m_type;
    @Signature("s")
    private String m_packageName;
}

和界面

@BusInterface (name="xxxx.simpleinterface")
public interface SimpleInterface {

    @BusSignal (name="Chat", signature="o")
    public void Chat(Package message) throws BusException;
}

但我收到此错误无法将类打包为 o 使用聊天（打包）时。

but i get this error cannot marshal class Package into 'o' when use Chat(Package)..

请帮助我，因为我无法在2周内解决此错误。

pls help me, because i can't get this error out for 2 weeks.

对不起，因为我的英语太糟糕了：）

sorry because my English is too bad :)

推荐答案

看着你的代码看起来像您要发送的是结构体，结构体的签名应为 r 或括号内的实际签名为（和）。例如，对于包裹，签名应为（sayiis）

looking at your code it looks like what you are trying to send is a struct the signature for a struct should be "r" or the actual signature surrounded by parenthesizes ( and ). i.e. for Package the signature would be "(sayiis)"

• 使用AllJoyn，您可以发送数组，但不能发送 ArrayList ，并且必须指定数组中的数据类型。


• 由于您的 DataSendType 指定了 TEXT 或 IMAGE 我假设您要发送一个字节数组。


• 我没有添加签名的大多数项目，因为AllJoyn可以使用反射来找出签名。但是，AllJoyn不知道枚举将作为整数传输，因此我必须为枚举指定签名。


• 包不必实现BusObject。在代码中，当您实现 SimpleInterface 时，应扩展 SimpleInterface 和`BusObject'



• 使用AllJoyn发送的任何内容都应该是公共的，以便接口可以读取成员变量。

• With AllJoyn you can send an array but not an ArrayList and you must specify the type of data that is in the array.
• Since your DataSendType specified TEXT or IMAGE I made the assumption that you want to send an array of bytes.
• Most of the items I did not add a signature to because AllJoyn can figure out the signature using reflection. AllJoyn however does not know that enums will be transmitted as integers so I did have to specify the signature for the enums.
• Package did not have to implement BusObject. In your code when you implement your SimpleInterface that should extend the SimpleInterface and `BusObject'

• Anything sent using AllJoyn should be public so the interface can read the member variables.

public class Package {
    public static enum DataSendType{
        TEXT,
        IMAGE
    }

    public static enum PackageStatus {
        NONE,
        SENDING,
        DONE
    }

    @Position(0)
    public String m_id;
    @Position(1)
    public byte[] m_listPackage;
    @Position(2)
    @Signature("i")
    public PackageStatus m_status;
    @Position(3)
    @Signature("i")
    public DataSendType m_type;
    @Position(4)
    public String m_packageName;
}

签名应为 r 来构造签名 o 表示对象路径。这是一个AllJoyn对象路径，这意味着它只是带有路径数据的字符串。

for the interface the signature should be "r" for struct the signature "o" means object path. This is an AllJoyn object path which means it just a string with path data.

@BusInterface (name="xxxx.simpleinterface")
public interface SimpleInterface {

    @BusSignal (name="Chat", signature="r")
    public void Chat(Package message) throws BusException;
}

如果您确实需要使用ArrayList，请先将ArrayList转换为实际的数组发送聊天信号。

If you really need to use an ArrayList convert the ArrayList to an actual array before sending the Chat signal.

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