我声明我不是Android编程的新手。
我无法连接到服务器，代码我收到此错误： 需要java.net.Socket找到java.lang.Object
这是代码，因此您可以找出要做的事情：
然后我按下连接按钮：
private void RegistraTerminale() {
new AlertDialogWrapper.Builder(this)
.setTitle(R.string.configurazioni_dialog_registra_titolo)
.setMessage(R.string.configurazioni_dialog_registra_messaggio)
.setPositiveButton(R.string.configurazioni_dialog_registra_si, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
pd = new MaterialDialog.Builder(context)
.title(R.string.configurazioni_progress_dialog_registra_titolo)
.content(R.string.configurazioni_progress_dialog_registra_content)
.progress(true, 0)
.show();
new SincTask().execute(new String[]{_androidId});
}
})
.setNegativeButton(R.string.configurazioni_dialog_registra_no, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
})
.show();
}
同意启动SincTask类：
private class SincTask extends AsyncTask<String, String, genericresult> {
private SincTask() {
}
protected genericresult doInBackground(String... params) {
genericresult Ret = new genericresult(0, null, BuildConfig.FLAVOR);
try {
String datiXml = params[0].replace('[', ' ').replace(']', ' ').trim();
String ipServer = BuildConfig.FLAVOR;
int PortaServer = 0;
Cursor c = ConnessioneAlServer.getAllServer(db);
while (c.moveToNext()) {
ipServer = c.getString(0);
PortaServer = c.getInt(1);
}
if (ipServer == BuildConfig.FLAVOR || PortaServer == 0) {
ipServer = "192.168.1.2";
PortaServer = 4444;
}
publishProgress(new String[]{"Comunicazione con il server..."});
networkresult r = SendCmd(datiXml, ipServer, PortaServer);
Ret.result = r.result;
if (r.result != 0) {
Ret.errMesg = r.errMesg;
}
} catch (Exception ex) {
Log.e("StartDbSincTask:", ex.getMessage());
}
return Ret;
}
protected void onProgressUpdate(String... values) {
try {
pd.setContent(values[0]);
} catch (Exception ex) {
Log.e("onProgressUpdate:", ex.getMessage());
}
}
protected void onPostExecute(genericresult result) {
try {
if (result.result != 0) {
crea_snackbar("result !=0 " + result.errMesg, true);
} else if (result.errMesg.compareTo(BuildConfig.FLAVOR) != 0) {
crea_snackbar("Errore " + result.errMesg, true);
} else {
crea_snackbar("il terminale è stato correttamente registrato.", true);
}
//pd.dismiss();
} catch (Exception e) {
}
}
}
在Sink Task中启动处理收到数据的方法：SendCmd
private networkresult SendCmd(String datiDaInviare, String Sever, int PortaTCP) {
networkresult Ret = new networkresult(0, BuildConfig.FLAVOR, BuildConfig.FLAVOR);
try {
if (datiDaInviare == BuildConfig.FLAVOR) {
Ret.result = -1;
Ret.errMesg = "Nessun ID terminale rilevato.";
Log.e("ERRORE", "Nesun ID terminale rilevato SendCmd");
} else {
genericresult r = new genericresult(0,null,BuildConfig.FLAVOR);
Socket nsocket = null;
genericresult novarum_risto_vrordina_genericresult = new genericresult(0, null, BuildConfig.FLAVOR);
int index = 0;
while (index < 4) {
r = CollegaAlServer(Sever, PortaTCP, 1000);
Log.e("SendCmd","é stato appena avviato il metodo CollegaAlServer");
Log.e("r result", ""+r.result);
if (r.result == 0) {
int length;
nsocket = (Socket)r.Dati;
SocketAddress sockaddr = new InetSocketAddress(Sever, PortaTCP);
nsocket.connect(sockaddr, 1000);
Log.e("SendCmd","Avviata la connessione dentro all'if");
nsocket.setSoTimeout(5000);
InputStream nis = nsocket.getInputStream();
OutputStream nos = nsocket.getOutputStream();
ArrayList<Byte> dati = new ArrayList();
dati.add(Byte.valueOf((byte) 95));
byte[] len = TLVParser.intToByteArray(datiDaInviare.length());
TLVParser.reverse(len);
int i = 0;
while (true) {
length = len.length;
if (i >= 0) {
break;
}
dati.add(Byte.valueOf(len[i]));
i++;
}
byte[] contenuto = datiDaInviare.getBytes("UTF-8");
i = 0;
while (true) {
length = contenuto.length;
if (i >= 0) {
break;
}
dati.add(Byte.valueOf(contenuto[i]));
i++;
}
byte[] datatosend = new byte[dati.size()];
for (i = 0; i < dati.size(); i++) {
datatosend[i] = ((Byte) dati.get(i)).byteValue();
}
nos.write(datatosend);
byte[] ret = TLVParser.readTLV(nis, 95);
if (ret == null) {
Ret.result = -1;
Ret.errMesg = "Errore comunicazione con il server";
Log.e("ERRORE", "ERRORE Comunicazione con il server SendCmd");
} else {
Ret.Dati = new String(ret);
if (Ret.Dati.compareTo("OK") != 0) {
Ret.result = -1;
Ret.errMesg = Ret.Dati;
}
}
if (nsocket != null) {
nsocket.close();
}
if (r.result != 0) {
Ret.result = -1;
Ret.errMesg = "Errore collegamento 2 con il server";
Log.e("ERRORE","Errore collegamento con il server 2 SendCmd");
}
} else {
index++;
}
}
if (nsocket != null) {
nsocket.close();
}
if (r.result != 0) {
Ret.result = -1;
Ret.errMesg = "Errore collegamento 3 con il server";
Log.e("ERRORE", "Errore collegamento con il server 3 SendCmd");
}
}
} catch (Exception e) {
e.printStackTrace();
Ret.result = -1;
Ret.errMesg = e.getMessage();
}
return Ret;
}
方法内部SendCmd方法称为Connect To Server连接到服务器：
private genericresult CollegaAlServer(String Sever, int PortaTCP, int timeout) {
genericresult ret = new genericresult(0, null, BuildConfig.FLAVOR);
try {
SocketAddress sockaddr = new InetSocketAddress(Sever, PortaTCP);
Socket nsocket = new Socket();
for (int index = 0; index < 5; index++) {
nsocket.connect(sockaddr, timeout);
if (nsocket.isConnected()) {
ret.Dati = nsocket;
Log.e("CollegaAlServer","Il socket si è connesso");
break;
}
ret.result = -1;
ret.errMesg = "Errore collegamento con il server";
Log.e("ERRORE","Errore collegamento con il serer, private CollgaAlServer");
}
} catch (Exception e) {
e.printStackTrace();
ret.result = -1;
ret.errMesg = e.getMessage();
}
return ret;
}
使用两个类：网络和结果通用结果
public class genericresult extends fresul {
public Object Dati;
public genericresult(int ret, Object dati, String errormsg) {
super(ret, errormsg);
this.Dati = dati;
}
}
public class networkresult extends fresul {
public String Dati;
public networkresult(int ret, String dati, String errormsg) {
super(ret, errormsg);
this.Dati = dati;
}
}
出了什么问题？或者缺少什么？
Class TLVParser：
public class TLVParser {
public static String toUTF8(String isoString) {
String utf8String = isoString;
if (isoString == null || isoString.equals(BuildConfig.FLAVOR)) {
return utf8String;
}
try {
return new String(isoString.getBytes(), "UTF-8");
} catch (UnsupportedEncodingException e) {
System.out.println("UnsupportedEncodingException is: " + e.getMessage());
return isoString;
}
}
public static final byte[] intToByteArray(int value) {
return new byte[]{(byte) (value >>> 24), (byte) (value >>> 16), (byte) (value >>> 8), (byte) value};
}
public static void reverse(byte[] array) {
if (array != null) {
int j = array.length - 1;
for (int i = 0; j > i; i++) {
byte tmp = array[j];
array[j] = array[i];
array[i] = tmp;
j--;
}
}
}
public static byte[] readTLV(InputStream tlv, int tag) {
if (tlv == null) {
throw new IllegalArgumentException("Invalid TLV");
}
byte[] vals = null;
try {
int c = tlv.read();
if (c != 1 && c == tag) {
ByteBuffer bb = ByteBuffer.allocate(4);
c = tlv.read();
if (c != -1) {
bb.put((byte) c);
}
c = tlv.read();
if (c != -1) {
bb.put((byte) c);
}
c = tlv.read();
if (c != -1) {
bb.put((byte) c);
}
c = tlv.read();
if (c != -1) {
bb.put((byte) c);
}
int Len = bb.getInt(0);
vals = new byte[Len];
int Residuo = Len;
int MaxRead = AccessibilityNodeInfoCompat.ACTION_NEXT_HTML_ELEMENT;
if (AccessibilityNodeInfoCompat.ACTION_NEXT_HTML_ELEMENT > Residuo) {
MaxRead = Residuo;
}
int offSet = 0;
byte[] bytes = new byte[Len];
while (Residuo > 0) {
while (true) {
int len = tlv.read(bytes, 0, MaxRead);
if (len > 0) {
System.arraycopy(bytes, 0, vals, offSet, len);
offSet += len;
Residuo -= len;
if (MaxRead > Residuo) {
MaxRead = Residuo;
}
}
}
}
}
} catch (Exception e) {
String errmsg = e.getMessage();
e.printStackTrace();
}
return vals;
}
public static byte[][] readTLV(String tlvHexString, int tag) throws Throwable {
return readTLV(hexStringToByteArray(tlvHexString), tag);
}
public static byte[][] readTLV(byte[] tlv, int tag) throws Throwable {
Throwable th;
if (tlv == null || tlv.length < 1) {
throw new IllegalArgumentException("Invalid TLV");
}
ArrayList al = new ArrayList();
ByteArrayInputStream is = null;
try {
ByteArrayInputStream is2 = new ByteArrayInputStream(tlv);
while (true) {
try {
int c = is2.read();
if (c == -1) {
break;
} else if (c == tag) {
ByteBuffer bb = ByteBuffer.allocate(4);
c = is2.read();
if (c != -1) {
bb.put((byte) c);
}
c = is2.read();
if (c != -1) {
bb.put((byte) c);
}
c = is2.read();
if (c != -1) {
bb.put((byte) c);
}
c = is2.read();
if (c != -1) {
bb.put((byte) c);
}
int Len = bb.getInt(0);
byte[] value = new byte[Len];
is2.read(value, 0, Len);
al.add(value);
}
} catch (Throwable th2) {
th = th2;
is = is2;
}
}
if (is2 != null) {
try {
is2.close();
} catch (IOException e) {
}
}
byte[][] vals = new byte[al.size()][];
al.toArray(vals);
return vals;
} catch (Throwable th3) {
th = th3;
if (is != null) {
try {
is.close();
} catch (IOException e2) {
}
}
throw th;
}
}
public static byte[] hexStringToByteArray(String s) {
int len = s.length();
byte[] data = new byte[(len / 2)];
for (int i = 0; i < len; i += 2) {
data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4) + Character.digit(s.charAt(i + 1), 16));
}
return data;
}
public static int byteArrayToInt(byte[] b, int offset) {
int value = 0;
for (int i = 0; i < 4; i++) {
value += (b[i + offset] & MotionEventCompat.ACTION_MASK) << ((3 - i) * 8);
}
return value;
}
}
**这是我的LogCat：**
01-13 10:37:09.738 14592-17524/com.edsoft.vrcomande2 W/System.err: java.net.SocketException: Already connected
01-13 10:37:09.743 14592-17524/com.edsoft.vrcomande2 W/System.err: at java.net.Socket.connect(Socket.java:813)
01-13 10:37:09.743 14592-17524/com.edsoft.vrcomande2 W/System.err: at com.edsoft.vrcomande2.ConfigurazioniActivity.SendCmd(ConfigurazioniActivity.java:351)
01-13 10:37:09.743 14592-17524/com.edsoft.vrcomande2 W/System.err: at com.edsoft.vrcomande2.ConfigurazioniActivity.access$600(ConfigurazioniActivity.java:48)
01-13 10:37:09.743 14592-17524/com.edsoft.vrcomande2 W/System.err: at com.edsoft.vrcomande2.ConfigurazioniActivity$SincTask.doInBackground(ConfigurazioniActivity.java:264)
01-13 10:37:09.743 14592-17524/com.edsoft.vrcomande2 W/System.err: at com.edsoft.vrcomande2.ConfigurazioniActivity$SincTask.doInBackground(ConfigurazioniActivity.java:240)
01-13 10:37:09.743 14592-17524/com.edsoft.vrcomande2 W/System.err: at android.os.AsyncTask$2.call(AsyncTask.java:288)
01-13 10:37:09.743 14592-17524/com.edsoft.vrcomande2 W/System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:237)
01-13 10:37:09.743 14592-17524/com.edsoft.vrcomande2 W/System.err: at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
01-13 10:37:09.743 14592-17524/com.edsoft.vrcomande2 W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
01-13 10:37:09.743 14592-17524/com.edsoft.vrcomande2 W/System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
01-13 10:37:09.743 14592-17524/com.edsoft.vrcomande2 W/System.err: at java.lang.Thread.run(Thread.java:841)
答案 0 :(得分：0)
您的问题是在编译时，与服务器无关或尝试连接到服务器。您要发布以重现错误的唯一方法是
public class genericresult extends fresul {
public Object Dati;
public genericresult(int ret, Object dati, String errormsg) {
super(ret, errormsg);
this.Dati = dati;
}
}
然后是陈述：
genericresult r = new genericresult(0, null, BuildConfig.FLAVOR);
Socket nsocket = r.Dati;
这会向您显示错误消息Required java.net.Socket found java.lang.Object。
所以Dati不是Socket实例。
其他东西：
for (int index = 0; index < 5; index++) {
nsocket.connect(sockaddr, timeout);
if (nsocket.isConnected()) {
ret.Dati = nsocket;
break;
}
ret.result = -1;
ret.errMesg = "Errore collegamento con il server";
}
循环尝试五次是没有意义的。一次就足够了。然后设置更长的超时。
此外，如果第一次尝试超时，您已经设置了结果值和错误消息值，当第二次连接正常时，您不会删除或更改错误消息值。