问题描述
我想实现我的Android应用程序卓悦/零的conf。我使用jmDns库中搜索所有可用的设备。下面是我使用的搜索在同一网络中的设备的code:
I am trying to implement bonjour/zero conf on my android app. I am using jmDns library for searching the all the available devices. Here is the code that I am using for searching the devices in the same network:
public class ListDevices extends ListActivity {
JmDNS jmdns;
JmDNSImpl impl;
MulticastLock lock;
protected ServiceListener listener;
protected ServiceInfo info;
public ListView lv;
public ArrayList<String> deviceList;
public int cancel = 0;
public final static String TAG = "ListDevices";
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
deviceList = new ArrayList<String>();
showAllPrinters();
setListAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, deviceList));
lv = getListView();
lv.setTextFilterEnabled(true);
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// When clicked, show a toast with the TextView text
Toast.makeText(getApplicationContext(),
((TextView) view).getText(), Toast.LENGTH_SHORT).show();
}
});
this.listener = new ServiceListener() {
public void serviceAdded(ServiceEvent event) {
deviceList.add("Service added : " + event.getName() + "."
+ event.getType());
Log.v(TAG, "Service added : " + event.getName() + "."
+ event.getType());
}
public void serviceRemoved(ServiceEvent event) {
deviceList.add("Service removed : " + event.getName() + "."
+ event.getType());
Log.v(TAG, "Service removed : " + event.getName() + "."
+ event.getType());
}
public void serviceResolved(ServiceEvent event) {
deviceList.add("Service resolved: " + event.getInfo());
Log.v(TAG, "Service resolved: " + event.getInfo());
}
};
}
public void showAllPrinters() {
Log.d("ListDevices", "in showAllPrinters");
try {
WifiManager wifi = (WifiManager)
getSystemService(Context.WIFI_SERVICE);
lock = wifi.createMulticastLock("fliing_lock");
lock.setReferenceCounted(true);
lock.acquire();
InetAddress inetAddress = getLocalIpAddress();
jmdns = JmDNS.create(inetAddress, "TEST");
ServiceInfo[] infos = jmdns.list("_http._tcp.local.");
if (infos != null && infos.length > 0) {
for (int i = 0; i < infos.length; i++) {
deviceList.add(infos[i].getName());
}
} else {
deviceList.add("No device found.");
}
impl = (JmDNSImpl) jmdns;
} catch (IOException e) {
e.printStackTrace();
}
}
public InetAddress getLocalIpAddress() {
try {
for (Enumeration<NetworkInterface> en = NetworkInterface
.getNetworkInterfaces(); en.hasMoreElements();) {
NetworkInterface intf = (NetworkInterface) en.nextElement();
for (Enumeration<InetAddress> enumIpAddr = intf
.getInetAddresses(); enumIpAddr.hasMoreElements();) {
InetAddress inetAddress = (InetAddress) enumIpAddr
.nextElement();
if (!inetAddress.isLoopbackAddress()) {
return inetAddress;
}
}
}
} catch (SocketException ex) {
Log.e("ListDevices", ex.toString());
}
return null;
}
@Override
protected void onPause() {
super.onPause();
if (isFinishing()) {
lock.release();
}
}
}
基本上,我加入他们的列表,以便我可以显示所有可用设备的列表。现在,当我运行这个code,我越来越没有异常/不一样的错误。但在另一方面,没有被添加到我的列表[PS:有ATLEAST 5-6 PC和Mac有没有在网络上
Basically, I am adding them in a list so that I can display a list of all available devices. Now when I am running this code, I am getting no exception/nothing like error. But on the other hand, nothing is added to my list [PS: there atleast 5-6 PCs and Macs are there in the network.
我也试图从中得到code名单:
I also tried to get the list from this code:
jmdns.addServiceListener("_http._tcp.local.", listener);
监听器
在的onCreate
活动的定义。不过这也没有退还任何设备。
listener
is defined in the onCreate
of the activity. But this also did not returned any device.
请帮忙,建议我在做什么错在这里。任何帮助AP preciated!
Please help, suggest what I am doing wrong here. Any help is appreciated!
推荐答案
的Android 4.1增加了网络服务发现,这似乎是刚刚结束了在不同的方面卓悦栈。我也看到了低级别的API名为android.net.wifi.p2p.WifiP2pManager一个公开DNS-SD(以及UPnP的?)直接。
Android 4.1 adds Network Service Discovery that seems to be just wrapping up the Bonjour stack in different terms. I also see a lower-level API called android.net.wifi.p2p.WifiP2pManager that exposes DNS-SD (as well as UPnP?) directly.
请注意,底层的mDNSResponder守护进程似乎并不运行所有的时间,而不能用于全系统DNS查找(例如从浏览器),据我可以告诉现在。
Note that the underlying mDNSResponder daemon does not seem to be running all the time, and is not used for systemwide DNS lookups (e.g. from a browser) as far as I can tell right now.
这篇关于在Android卓悦执行的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!