使用alljoyn发送数据

Question

我使用alljoyn将字符串转换为字节数组后，该字符串也包含图像(在使用Base64进行字符串转换后)。它工作得很好，但是如果有一些图像，它会产生以下错误

08-08 18:55:21.158  20724-21095/co.coinflipsrl.infomage E/ALLJOYN﹕ 20.237 ****** ERROR ALLJOYN external          ...oyn_core/src/MsgArg.cc:790 |  0x900d
08-08 18:55:21.159  20724-21095/co.coinflipsrl.infomage E/ALLJOYN_JAVA﹕ 20.238 ****** ERROR ALLJOYN_JAVA external     .../jni/alljoyn_java.cc:11480 |  0x0001
08-08 18:55:21.161  20724-21095/co.coinflipsrl.infomage E/SimpleClient﹕ SimpleInterface.Ping(): org.alljoyn.bus.MarshalBusException: cannot marshal class [B into 'ay'
org.alljoyn.bus.MarshalBusException: cannot marshal class [B into 'ay'
        at org.alljoyn.bus.MsgArg.marshal(MsgArg.java:534)
        at org.alljoyn.bus.MsgArg.marshal(MsgArg.java:556)
        at org.alljoyn.bus.ProxyBusObject.methodCall(Native Method)
        at org.alljoyn.bus.ProxyBusObject.access$300(ProxyBusObject.java:35)
        at org.alljoyn.bus.ProxyBusObject$Handler.invoke(ProxyBusObject.java:264)
        at java.lang.reflect.Proxy.invoke(Proxy.java:397)
        at $Proxy2.Ping(Unknown Source)
        at co.coinflipsrl.infomage.sharing.alljoynshare.ClientFragment$BusHandler.handleMessage(ClientFragment.java:292)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:135)
        at android.os.HandlerThread.run(HandlerThread.java:61)
 Caused by: org.alljoyn.bus.BusException: ER_BUS_BAD_VALUE
        at org.alljoyn.bus.MsgArg.set(Native Method)
        at org.alljoyn.bus.MsgArg.marshal(MsgArg.java:464)

发送代码是：

 sendUiMessage(MESSAGE_PING, msg.obj);
                        byte[] sentObj = (byte[]) msg.obj;
                        Object reply = mSimpleInterface.Ping((byte[]) msg.obj);
                        byte[] receivedObj = (byte[]) reply;
                        if (Arrays.equals(sentObj, receivedObj)) {
                            sendUiMessage(MESSAGE_PING_REPLY, true);
                        } else {
                            sendUiMessage(MESSAGE_PING_REPLY, false);
                        }

接收代码是：

 public byte[] Ping(byte[] inStr) {

        sendUiMessage(MESSAGE_PING, inStr);

         //Simply echo the ping message.
        sendUiMessage(MESSAGE_PING_REPLY, inStr);
        return inStr;
    }

    /* Helper function to send a message to the UI thread. */
    private void sendUiMessage(int what, Object obj) {
        mHandler.sendMessage(mHandler.obtainMessage(what, obj));
    }

Answer 1

我觉得你的数据是空的。null不能通过alljoyn发送

Object reply = mSimpleInterface.Ping((byte[]) msg.obj);

Answer 2

当字节数组大小很大时，会出现此异常，通过在固定大小的字节数组100000中以多个数据包发送数据来克服此问题。希望这能帮上忙。

FileInputStream fis = new FileInputStream(path);
byte[] buf = new byte[100000];

while (fis.read(buf) > 0) {
    mSimpleInterface.Ping(buf);
    transferedFileBytes += buf.length;
}