Java readUTF（）导致Android应用程序挂起
我正试图在link上编译代码 代码不起作用，因为它挂起在这行上：Java readUTF（）导致Android应用程序挂起,java,android,Java,Android,我正试图在link上编译代码 代码不起作用，因为它挂起在这行上： textIn.setText(dataInputStream.readUTF()); 出于某种原因，它不会挂在writeUTF上，而是挂在readUTF上 有人能给我指一下正确的方向吗 这是我的密码： public Socket socket = null; public DataOutputStream dataOutputStream = null; public DataInputStream dataInputStrea
textIn.setText(dataInputStream.readUTF());
public Socket socket = null;
public DataOutputStream dataOutputStream = null;
public DataInputStream dataInputStream = null;
public Thread readjsonthrd = new Thread(new ReadJSONThread());
private final static String LOG_TAG = AndroidClient.class.getSimpleName();
private final Handler handler = new Handler();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Log.e(LOG_TAG, "Before OnCreate() Try");
try {
Log.e(LOG_TAG, "In OnCreate() Try");
socket = new Socket("23.23.175.213", 9000);
Log.e(LOG_TAG, "Created Socket");
dataOutputStream = new DataOutputStream(socket.getOutputStream());
Log.e(LOG_TAG, "Created DataOutputStream");
dataInputStream = new DataInputStream(socket.getInputStream());
Log.e(LOG_TAG, "Created DataInputStream");
Profile p = new Profile();
Log.e(LOG_TAG, "Created Profile Instance");
//Gets the local profile via JSON and converts into Profile type
Gson gson = new Gson();
Log.e(LOG_TAG, "Created Gson Instance");
p = gson.fromJson(p.getProfileJSONStr(), Profile.class);
Log.e(LOG_TAG, "Converted Profile to JSON");
//Gson gson = new Gson();
Log.e(LOG_TAG, "Before: outputJSON = gson.toJson(p);");
outputJSON = gson.toJson(p);
Log.e(LOG_TAG, "Created outputJSON");
dataOutputStream.writeUTF(outputJSON); //OUTPUT OF JSON FROM LOCAL PROFILE BEING SENT TO THE SERVER
dataOutputStream.flush();
Log.e(LOG_TAG, "Created dataOutputStream");
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Log.e(LOG_TAG, "Before initEventHandlers");
initEventHandlers();
Log.e(LOG_TAG, "Create Thread");
Thread serverthrd = new Thread(new ServerThread());
Log.e(LOG_TAG, "Start Thread");
serverthrd.start();
Log.e(LOG_TAG, "Started Thread");
}
public class ServerThread implements Runnable {
@Override
public void run() {
// TODO Auto-generated method stub
//Socket socket = null;
//DataOutputStream dataOutputStream = null;
//DataInputStream dataInputStream = null;
Log.e(LOG_TAG, "Before Server Try Statement");
try {
Log.e(LOG_TAG, "In Server Try Statement");
//socket = new Socket("23.23.175.213", 1337);
//dataOutputStream = new DataOutputStream(socket.getOutputStream());
//dataInputStream = new DataInputStream(socket.getInputStream());
/*Profile p = null;
//Gets the local profile via JSON and converts into Profile type
Gson gson = new Gson();
p = gson.fromJson(p.getProfileJSONStr(), Profile.class);
//Gson gson = new Gson();
outputJSON = gson.toJson(p);
dataOutputStream.writeUTF(outputJSON); //OUTPUT OF JSON FROM LOCAL PROFILE BEING SENT TO THE SERVER
*/
//dataOutputStream.writeUTF(textOut.getText().toString()); //OUTPUT JSON GOES HERE
//textIn.setText(dataInputStream.readUTF());
Log.e(LOG_TAG, "Start Thread");
readjsonthrd.start();
Log.e(LOG_TAG, "Started Thread");
/*Log.e(LOG_TAG, "Before inputJSON String");
inputJSON = dataInputStream.readUTF();
//Convert
Log.e(LOG_TAG, "After inputJSON String");
Log.e(LOG_TAG, "InputJSON:" + inputJSON);*/
//textIn.setText(dataInputStream.readUTF()); //GET JSON COMING FROM SERVER HERE
refreshViewModels();
} /*catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}*/
finally{
if (socket != null){
try {
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (dataOutputStream != null){
try {
dataOutputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (dataInputStream != null){
try {
dataInputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
public class ReadJSONThread implements Runnable {
@Override
public void run() {
// TODO Auto-generated method stub
//Socket socket = null;
//DataOutputStream dataOutputStream = null;
//DataInputStream dataInputStream = null;
Log.e(LOG_TAG, "Before Read JSON Try Statement");
try {
Log.e(LOG_TAG, "Before inputJSON String");
inputJSON = dataInputStream.readUTF();
//Convert
Log.e(LOG_TAG, "After inputJSON String");
}
catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
注意：如果您在主活动中运行此功能，从ICS开始，您将遇到在主线程中打开网络连接的限制问题。如果您选择不禁用限制，一个快速解决方案是asynctask，它可能不允许您访问主布局和文本视图 在与一个gov API集成时，我遇到了一些类似的问题，当时我使用的是readUTF writeUTF，每次在readUTF上都没有任何响应 我发现服务器是用c语言编写的，并且需要以*结尾或请求字符串，响应也以*结尾 我解决了这个问题，直接在套接字的输入/输出流上写入，并在遇到**时终止读取
Socket client = new Socket(serverIp, port);
OutputStream out = client.getOutputStream();
InputStream in = client.getInputStream();
String test = "REQUEST-STRING**";
out.write(test.getBytes());
out.flush();
int c;
while ((c=in.read())!=-1) {
if (isEndOfResponse(c)) {
break;
}
System.out.print((char)c);
}
client.close();
在与集成时，我遇到了一些类似的问题 在一个GovAPI中，我使用的是readUTF-writeUTF，每次在readUTF上都没有任何响应 我发现服务器是用c语言编写的，并且需要以*结尾或请求字符串，响应也以*结尾 我解决了这个问题，直接在套接字的输入/输出流上写入，并在遇到**时终止读取
Socket client = new Socket(serverIp, port);
OutputStream out = client.getOutputStream();
InputStream in = client.getInputStream();
String test = "REQUEST-STRING**";
out.write(test.getBytes());
out.flush();
int c;
while ((c=in.read())!=-1) {
if (isEndOfResponse(c)) {
break;
}
System.out.print((char)c);
}
client.close();
public static DataInputStream dis;
//...
Thread thread = new Thread() {
@Override
public void run() {
while (Connected) {
String msg = null;
try {
if(dis==null)break;
msg = dis.readLine();
Log.i("TAG", "dataRecived: "+msg);
} catch (IOException e) {
e.printStackTrace();
}
}
Log.i("TAG", "Reciver END");
}
};
thread.start();
public static DataInputStream dis;
//...
Thread thread = new Thread() {
@Override
public void run() {
while (Connected) {
String msg = null;
try {
if(dis==null)break;
msg = dis.readLine();
Log.i("TAG", "dataRecived: "+msg);
} catch (IOException e) {
e.printStackTrace();
}
}
Log.i("TAG", "Reciver END");
}
};
thread.start();