我再次有这个关于 NSD 的问题，这次我想问一下是否有人知道如何只显示服务名称而不显示端口、主机、服务类型等所有详细信息。到目前为止，我设法使用 ArrayList 和 NsdServiceInfo 对象显示所有服务它显示了我之前提到的有关服务的所有详细信息，但就我而言，我只想显示服务名称。
如果您有任何想法，非常欢迎您与我分享
private String SERVICE_TYPE = "_lala._tcp.";
private InetAddress hostAddress;
private int hostPort;
private NsdManager mNsdManager;
NsdServiceInfo mService;
private WebView mWebView;
ArrayList<NsdServiceInfo> services;
ArrayAdapter<NsdServiceInfo> adapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Getting toolbar by id
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
//disabling default title text
getSupportActionBar().setDisplayShowTitleEnabled(false);
//NSD stuff
mNsdManager = (NsdManager) getSystemService(Context.NSD_SERVICE);
mNsdManager.discoverServices(SERVICE_TYPE, NsdManager.PROTOCOL_DNS_SD, mDiscoveryListener);
//Creating the arrayList and arrayAdapter to store services
services = new ArrayList<>();
adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, services);
ListView listView = findViewById(R.id.ListViewServices);
listView.setAdapter(adapter);
//Creating onClick listener for the chosen service and trying to resolve it
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
Object serviceObj = adapterView.getItemAtPosition(i);
NsdServiceInfo selectedService = (NsdServiceInfo) serviceObj;
//mNsdManager.stopServiceDiscovery(mDiscoveryListener);
mNsdManager.resolveService(selectedService, mResolveListener);
}
});
}
// Each time create new discovery listener for discovery methods onServicefound.
NsdManager.DiscoveryListener mDiscoveryListener = new NsdManager.DiscoveryListener() {
@Override
public void onStartDiscoveryFailed(String serviceType, int errorCode) {
Log.e("TAG", "DiscoveryFailed: Error code: " + errorCode);
mNsdManager.stopServiceDiscovery(this);
}
@Override
public void onStopDiscoveryFailed(String serviceType, int errorCode) {
Log.e("TAG", "Discovery failed : Error code: " + errorCode);
}
@Override
public void onDiscoveryStarted(String regType) {
Log.d("TAG", "Service discovery started");
}
@Override
public void onDiscoveryStopped(String serviceType) {
Log.i("TAG", "Discovery stopped: " + serviceType);
}
// When service is found add it to the array. Log d is for debugging purposes.
@Override
public void onServiceFound(NsdServiceInfo serviceInfo) {
Log.d("TAG", "Service discovery success : " + serviceInfo);
Log.d("TAG", "Host = " + serviceInfo.getServiceName());
Log.d("TAG", "Port = " + serviceInfo.getPort());
services.add(serviceInfo);
//Notifying adapter about change in UI thread because it informs view about data change.
runOnUiThread(new Runnable() {
@Override
public void run() {
adapter.notifyDataSetChanged();
}
});
}
//When service connection is lost to avoid duplicating we create new serviceToRemove object and check if that object is equals to current service,
// if it yes wre remove the service from an array and inform adapter about the change.
@Override
public void onServiceLost(NsdServiceInfo nsdServiceInfo) {
Log.d("TAG", "Service lost " + nsdServiceInfo);
NsdServiceInfo serviceToRemove = new NsdServiceInfo();
for (NsdServiceInfo currentService : services) {
if (currentService.getHost() == nsdServiceInfo.getHost() && currentService.getPort() == currentService.getPort() && currentService.getServiceName() == currentService.getServiceName()) {
serviceToRemove = currentService;
}
}
if (serviceToRemove != null) {
services.remove(serviceToRemove);
runOnUiThread(new Runnable() {
@Override
public void run() {
adapter.notifyDataSetChanged();
}
});
}
Log.d("TAG", "Xd" + services);
}
//}
};
//Creating new Resolve listener each time when user chooses the service. If the connection was made we launch web view activity with the webpage.
NsdManager.ResolveListener mResolveListener = new NsdManager.ResolveListener() {
@Override
public void onResolveFailed(NsdServiceInfo nsdServiceInfo, int errorCode) {
Log.e("TAG", "Resolved failed " + errorCode);
Log.e("TAG", "Service = " + nsdServiceInfo);
}
@Override
public void onServiceResolved(NsdServiceInfo nsdServiceInfo) {
Log.d("TAG", "bbz" + nsdServiceInfo);
runOnUiThread(new Runnable() {
@Override
public void run() {
Intent intent = new Intent(MainActivity.this, WebViewActivity.class);
startActivity(intent);
}
});
Log.d("TAG", "Resolve Succeeded " + nsdServiceInfo);
if (nsdServiceInfo.getServiceType().equals(SERVICE_TYPE)) {
Log.d("TAG", "Same IP");
return;
}
hostPort = nsdServiceInfo.getPort();
hostAddress = nsdServiceInfo.getHost();
}
};
// NsdHelper's tearDown method
public void tearDown() {
mNsdManager.stopServiceDiscovery(mDiscoveryListener);
}
}