我正在为android构建一个简单的MQTT客户端,我在RMBS控制台上收到“客户端标识符的套接字错误”错误。这只发生在客户端的android实现中(我还创建了一个Java桌面客户端并且运行没有问题)。对于Android客户端,我正在起诉Paho Java客户端库。这是我的代码:
这是Android客户端:
package com.example.mqttdroid;
import org.eclipse.paho.client.mqttv3.MqttCallback;
import org.eclipse.paho.client.mqttv3.MqttClient;
import org.eclipse.paho.client.mqttv3.MqttDeliveryToken;
import org.eclipse.paho.client.mqttv3.MqttException;
import org.eclipse.paho.client.mqttv3.MqttMessage;
import org.eclipse.paho.client.mqttv3.MqttTopic;
import org.eclipse.paho.client.mqttv3.internal.MemoryPersistence;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.widget.Toast;
public class MQTTClient extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_mqttclient);
// new BackTask().execute(); not used because (seems to be the problem)
MqttConnectOptions conOpts = new MqttConnectOptions();
conOpts.setKeepAliveInterval(30);
conOpts.setWill(client.getTopic("Error"), "something bad happened".getBytes(), 1, true);
client.connect(conOpts);
client.subscribe("/House/Kitchen/Bulb");
client.setCallback( new MqttCallback() {
@Override
public void connectionLost(Throwable arg0) {
// TODO Auto-generated method stub
}
@Override
public void deliveryComplete(IMqttDeliveryToken arg0) {
// TODO Auto-generated method stub
}
@Override
public void messageArrived(String arg0, MqttMessage arg1)
throws Exception {
// TODO Auto-generated method stub
Toast.makeText(Main.this, arg0.toString(), Toast.LENGTH_SHORT).show();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.mqttclient, menu);
return true;
}
/*public class BackTask extends AsyncTask<Void, Void, Void>{
private MqttClient client;
@Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
try {
client = new MqttClient("tcp://"Ip of machine running RSMB":1883", "ANDROID1", new MemoryPersistence());
client.connect();
client.subscribe("House/Kitchen/Bulb");
} catch (MqttException e) {
// TODO Auto-generated catch block
Log.e("ERROR", "NOT CONNECTED");
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
try {
client.setCallback( new MqttCallback() {
@Override
public void messageArrived(MqttTopic arg0, MqttMessage arg1)
throws Exception {
// TODO Auto-generated method stub
Toast.makeText(MQTTClient.this, arg0.toString(), Toast.LENGTH_SHORT).show();
}
@Override
public void deliveryComplete(MqttDeliveryToken arg0) {
// TODO Auto-generated method stub
}
@Override
public void connectionLost(Throwable arg0) {
// TODO Auto-generated method stub
}
});
} catch (MqttException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}*/
这是桌面Java客户端:
import org.eclipse.paho.client.mqttv3.MqttCallback;
import org.eclipse.paho.client.mqttv3.MqttClient;
import org.eclipse.paho.client.mqttv3.MqttClientPersistence;
import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
import org.eclipse.paho.client.mqttv3.MqttDeliveryToken;
import org.eclipse.paho.client.mqttv3.MqttException;
import org.eclipse.paho.client.mqttv3.MqttMessage;
import org.eclipse.paho.client.mqttv3.MqttPersistenceException;
import org.eclipse.paho.client.mqttv3.MqttTopic;
import org.eclipse.paho.client.mqttv3.internal.MemoryPersistence;
public class MQTTBaseClass {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
MqttClientPersistence persistence;
try {
MqttClient client = new MqttClient("tcp://localhost:1883", "PC",new MemoryPersistence());
MqttConnectOptions conOpts = new MqttConnectOptions();
conOpts.setKeepAliveInterval(30);
conOpts.setWill(client.getTopic("Error"), "something bad happened".getBytes(), 1, true);
client.connect(conOpts);
MqttMessage msg = new MqttMessage("hello".getBytes());
msg.setQos(0);
msg.setRetained(true);
MqttTopic topic = client.getTopic("House/Kitchen/Bulb");
client.subscribe("House/Kitchen/Bulb");
try {
client.setCallback( new MqttCallback() {
@Override
public void messageArrived(MqttTopic arg0, MqttMessage arg1)
throws Exception {
// TODO Auto-generated method stub
System.out.println(arg1.toString());
}
@Override
public void deliveryComplete(MqttDeliveryToken arg0) {
// TODO Auto-generated method stub
}
@Override
public void connectionLost(Throwable arg0) {
// TODO Auto-generated method stub
}
});
} catch (MqttException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
topic.publish(msg);
} catch (MqttPersistenceException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (MqttException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
只是几点说明:
我通过WiFi在我的Android设备上连接,当我运行Java Dekstop客户端时,我的桌面也是如此。
Java Destop Client与RSMB在同一台计算机上运行
Java Desktop Client创建并显示主题“House / Kitchen / Bulb”并发送带有字符串“Hello”的消息
Android客户端还订阅“House / Kitchen / Bulb”并尝试使用收到的消息显示Toast。
我已经在android清单
上添加了Internet权限Android设备似乎很好地连接到代理,但是一旦我初始化Java桌面服务客户端(或Eclipse中的Paho客户端插件并发布消息),我就会收到提到的错误。
我在RSMB运行的同一台机器上使用模拟器运行应用程序,我也遇到了同样的错误。
可能是什么问题?
更新:
最初,我有一个“主线程上的网络”异常,所以我将连接操作移动到AsyncTask。现在看来,当我用Java客户端发布消息时,Android客户端仍然连接(Asynctask可能一直在创建问题),但似乎没有调用MqttCallback()的messageArrived()。
更新2:
我设法让它发挥作用。这是我现在使用的代码:
package com.example.mqttphone;
*import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken;
import org.eclipse.paho.client.mqttv3.MqttCallback;
import org.eclipse.paho.client.mqttv3.MqttClient;
import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
import org.eclipse.paho.client.mqttv3.MqttException;
import org.eclipse.paho.client.mqttv3.MqttMessage;
import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.widget.Toast;*
public class Main extends Activity {
protected static String msg;
public MqttClient client;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
try {
client = new MqttClient("tcp://10.1.201.27:1883", "ANDROID1", new MemoryPersistence());
MqttConnectOptions conOpts = new MqttConnectOptions();
conOpts.setKeepAliveInterval(30);
conOpts.setWill(client.getTopic("Error"), "something bad happened".getBytes(), 1, true);
client.setCallback( new MqttCallback() {
@Override
public void connectionLost(Throwable arg0) {
// TODO Auto-generated method stub
}
@Override
public void deliveryComplete(IMqttDeliveryToken arg0) {
// TODO Auto-generated method stub
}
@Override
public void messageArrived(String arg0, MqttMessage arg1)
throws Exception {
// TODO Auto-generated method stub
Main.msg = arg1.toString();
Main.this.runOnUiThread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
Toast.makeText(Main.this, msg, Toast.LENGTH_LONG).show();
}
});
Log.e("MESSAGE RECEIVED", arg1.toString());
}
});
client.connect(conOpts);
//MqttMessage msg = new MqttMessage("ANDROID MESSAGE".getBytes());
//client.getTopic("world").publish(msg);
if(client.isConnected()){
client.subscribe("/House/Kitchen/Bulb");
Toast.makeText(this, "CONNECTED", Toast.LENGTH_SHORT).show();
}
} catch (MqttException e) {
// TODO Auto-generated catch block
Log.e("ERROR", "NOT CONNECTED");
e.printStackTrace();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
答案 0 :(得分:3)
您好我已经使用了您的代码,但是我无法将我的paho客户端连接到我的apollo服务器,我收到了以下错误。
I/global(677): Default buffer size used in BufferedOutputStream constructor. It would be better to be explicit if an 8k buffer is required.
E/ERROR(677): NOT CONNECTED
W/System.err(677): (32109) - java.io.EOFException
W/System.err(677): at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:127)
W/System.err(677): at java.lang.Thread.run(Thread.java:1096)
W/System.err(677): Caused by: java.io.EOFException
W/System.err(677): at java.io.DataInputStream.readFully(DataInputStream.java:266)
W/System.err(677): at org.eclipse.paho.client.mqttv3.internal.wire.MqttInputStream.readMqttWireMessage(MqttInputStream.java:63)
W/System.err(677): at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:94)
W/System.err(677): ... 1 more
感谢
吉里什
答案 1 :(得分:1)
我得到了它的工作。这是github存储库的link,每个人都可以找到实现此代码的项目。它允许用户通过语音识别使用他们的Android设备远程打开LED灯。