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POSocket io errors during receiving
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  1. POSocket io errors during receiving
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    copied!<p>I am making android application using socket io by using library Gottox/socket.io-java-client i sent the data successfully to the server but i have problems in receiving responses from the server i got these errors</p> <pre><code>09-14 01:31:43.441: E/AndroidRuntime(585): FATAL EXCEPTION: main 09-14 01:31:43.441: E/AndroidRuntime(585): java.lang.NullPointerException 09-14 01:31:43.441: E/AndroidRuntime(585): at a.a.a.SocketsActivity$1.onClick(SocketsActivity.java:121) 09-14 01:31:43.441: E/AndroidRuntime(585): at android.view.View.performClick(View.java:2408) 09-14 01:31:43.441: E/AndroidRuntime(585): at android.view.View$PerformClick.run(View.java:8816) 09-14 01:31:43.441: E/AndroidRuntime(585): at android.os.Handler.handleCallback(Handler.java:587) 09-14 01:31:43.441: E/AndroidRuntime(585): at android.os.Handler.dispatchMessage(Handler.java:92) 09-14 01:31:43.441: E/AndroidRuntime(585): at android.os.Looper.loop(Looper.java:123) 09-14 01:31:43.441: E/AndroidRuntime(585): at android.app.ActivityThread.main(ActivityThread.java:4627) 09-14 01:31:43.441: E/AndroidRuntime(585): at java.lang.reflect.Method.invokeNative(Native Method) 09-14 01:31:43.441: E/AndroidRuntime(585): at java.lang.reflect.Method.invoke(Method.java:521) 09-14 01:31:43.441: E/AndroidRuntime(585): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 09-14 01:31:43.441: E/AndroidRuntime(585): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 09-14 01:31:43.441: E/AndroidRuntime(585): at dalvik.system.NativeStart.main(Native Method) 09-14 01:31:48.433: I/global(585): Default buffer size used in BufferedOutputStream constructor. It would be better to be explicit if an 8k buffer is required. 09-14 01:31:49.481: I/io.socket(585): &gt; 3:::{"Action": "AuthenticateUser","Parameters":[{"UserName": "a","Password": "a"}]} 09-14 01:31:49.481: I/io.socket(585): &lt; 1:: 09-14 01:31:50.681: I/io.socket(585): &lt; 5:::{"name":"message","args":[{"Action":"AuthenticateUser","RequestStatus":"100","RequestStatusMessage":"Invalid UserName/password"}]} 09-14 01:31:50.681: W/System.err(585): a.a.a.SocketIOException: Exception was thrown in on(String, JSONObject[]). 09-14 01:31:50.681: W/System.err(585): Message was: 5:::{"name":"message","args":[{"Action":"AuthenticateUser","RequestStatus":"100","RequestStatusMessage":"Invalid UserName/password"}]} 09-14 01:31:50.691: W/System.err(585): at a.a.a.IOConnection.transportMessage(IOConnection.java:684) 09-14 01:31:50.691: W/System.err(585): at a.a.a.WebsocketTransport.onMessage(WebsocketTransport.java:99) 09-14 01:31:50.691: W/System.err(585): at de.roderick.weberknecht.WebSocketReceiver.run(WebSocketReceiver.java:57) 09-14 01:31:50.691: W/System.err(585): Caused by: java.lang.ClassCastException: a.a.a.IOConnection 09-14 01:31:50.691: W/System.err(585): at a.a.a.IOConnection.findCallback(IOConnection.java:487) 09-14 01:31:50.701: W/System.err(585): at a.a.a.IOConnection.transportMessage(IOConnection.java:679) 09-14 01:31:50.701: W/System.err(585): ... 2 more </code></pre> <p>here it is my code </p> <pre><code>private void SendDataToServer(String username,String password) { SocketIO socket=new SocketIO(); try { socket = new SocketIO("http://41.69.103.53:1333/"); } catch (MalformedURLException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } socket.connect(new IOCallback() { public void onMessage(JSONObject json, IOAcknowledge ack) { try { System.out.println("Server said:" + json.toString(2)); // x=json.toString(2); // z=json.toString(); } catch (JSONException e) { e.printStackTrace(); } } public void onMessage(String data, IOAcknowledge ack) { //tv.setText(data); //System.out.println("Server said: " + data); // x=data; } public void onError(SocketIOException socketIOException) { //tv.setText(socketIOException.toString()); //System.out.println("an Error occured"); request=0; socketIOException.printStackTrace(); } public void onDisconnect() { // tv.setText("Connection terminated."); //System.out.println("Connection terminated."); request=0; } public void onConnect() { // tv.setText("Connection terminated."); // System.out.println("Connection established"); } public void on(String event, IOAcknowledge ack, Object... args) { //tv.setText("Server triggered event '" + event + "'"); // System.out.println("Server triggered event '" + event + "'"); x=event; } }); // This line is cached until the connection is establisched. String request="{\"Action\": \"AuthenticateUser\""+","+ "\"Parameters\":"; String request_2="[{"+"\"UserName\": "+"\""+username_string+"\""+","+ "\"Password\""+": "+"\""+password_string+"\""+"}]}"; String FinalRequest_login=request+request_2; socket.send(FinalRequest_login); } </code></pre> <p>i found the line that causes the exception</p> <pre><code>public void transportMessage(String text) { logger.info("&lt; " + text); IOMessage message; try { message = new IOMessage(text); } catch (Exception e) { error(new SocketIOException("Garbage from server: " + text, e)); return; } resetTimeout(); switch (message.getType()) { case IOMessage.TYPE_DISCONNECT: try { findCallback(message).onDisconnect(); } catch (Exception e) { error(new SocketIOException( "Exception was thrown in onDisconnect()", e)); } break; case IOMessage.TYPE_EVENT: try { JSONObject event = new JSONObject(message.getData()); Object[] argsArray; if (event.has("args")) { JSONArray args = event.getJSONArray("args"); argsArray = new Object[args.length()]; for (int i = 0; i &lt; args.length(); i++) { if (args.isNull(i) == false) argsArray[i] = args.get(i); } } else argsArray = new Object[0]; String eventName = event.getString("name"); try { findCallback(message).on(eventName, remoteAcknowledge(message), argsArray); } **catch (Exception e) { error(new SocketIOException( "Exception was thrown in on(String, JSONObject[]).\n" + "Message was: " + message.toString(), e));** } </code></pre> <p>this is the Exception <strong>catch (Exception e) { error(new SocketIOException( "Exception was thrown in on(String, JSONObject[]).\n" + "Message was: " + message.toString(), e));</strong></p> <p>because of this function</p> <pre><code>public void on(String event, IOAcknowledge ack, Object... args) { for (SocketIO socket : sockets.values()) socket.getCallback().on(event, ack, args); } </code></pre> <p>can anyone fix it to me or help me why do i get this exception??thanks in advance</p>
 

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