socket未将Android连接到pc tcp
socket未将Android连接到pc tcp
提问于 2018-07-05 23:32:48
我现在有点不知所措。我有一个Android客户端正在尝试连接我pc上的服务器。它是一个实际的设备，没有被仿真。在发送数据时，我得到了SocketExceptions。我连接到与pc相同的网络，端口被转发。我不确定现在的问题在哪里。下面是堆栈跟踪
07-05 11:20:06.876 21128-21587/com.apklegion.pcnotetest W/System.err:
java.net.SocketException: Socket is not connected
07-05 11:20:06.877 21128-21587/com.apklegion.pcnotetest W/System.err: at
java.net.Socket.getOutputStream(Socket.java:921)
07-05 11:20:06.878 21128-21587/com.apklegion.pcnotetest W/System.err: at
com.apklegion.pcnotetest.MainActivity$sendData.doInBackground(MainActivity.
java:80) at com.apklegion.pcnotetest.MainActivity$sendData.doInBackground
(MainActivity.java:61)
at android.os.AsyncTask$2.call(AsyncTask.java:304)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:243)
at java.util.concurrent.ThreadPoolExecutor.runWorker
(ThreadPoolExecutor.java:1133)
at java.util.concurrent.ThreadPoolExecutor$Worker.run
(ThreadPoolExecutor.java:607)
07-05 11:20:06.879 21128-21587/com.apklegion.pcnotetest W/System.err: at
java.lang.Thread.run(Thread.java:761)以下是该应用程序的代码
private static String ip = "10.0.0.3";
private static int port = 5555;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
el = (EditText)findViewById(R.id.text);
button = (Button)findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
message = el.getText().toString();
SendData sd = new sendData();
sd.execute(message);
Toast.makeText(getApplicationContext(),"Data
Sent",Toast.LENGTH_LONG).show();
Toast.makeText(getApplicationContext(),message,Toast.LENGTH_LONG).show();
}
});
}
class SendData extends AsyncTask<String, Void, Void> {
@Override
protected Void doInBackground(String... voids) {
String message = voids[0];
try {
Log.i(TAG, "Attempting to send...");
s = new Socket();
s.connect(new InetSocketAddress(ip,port));
Log.i(TAG,"Socket connected...");
}
catch (IOException e) {
e.printStackTrace();
}
try {
pr = new PrintWriter(s.getOutputStream());
Log.i(TAG,"Get Outstream...");
error here--> pr.write(message);
Log.i(TAG,"writing message...");
pr.flush();
Log.i(TAG,"flushing...");
pr.close();
} catch (IOException e) {
e.printStackTrace();
}
Log.i(TAG,"closing...");
try {
s.close();
Log.i(TAG,"socket closed...");
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
}
}最后但并非最不重要的是PC端的服务器代码
public class Testtcp2 {
private static ServerSocket ss;
private static Socket s;
private static BufferedReader bufferedreader;
private static InputStreamReader isr;
private static String message;
public static void main(String[] args) {
try{
ss = new ServerSocket(5555);
while(true){
s = ss.accept();
isr = new InputStreamReader(s.getInputStream());
bufferedreader = new BufferedReader(isr);
message = bufferedreader.readLine();
System.out.println(message);
}
} catch (IOException ex) {
Logger.getLogger(Testtcp2.class.getName()).log(Level.SEVERE, null,
ex);
}
}
}回答 1
Stack Overflow用户
回答已采纳
发布于 2018-07-06 00:16:19
提供的代码片段忽略了连接故障。请从记录当前被忽略的异常开始：
try {
// ...
s = new Socket();
s.connect(new InetSocketAddress(ip,port));
// ...
}
catch (IOException e) {
// Here lays an answer for your issue, just log it and see the cause.
e.printStackTrace(); // As suggested by @gabe-sechan.
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/51195168
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