My classmate and I are trying to design a new app, but we are stuck with a problem.
We are trying to connect our Raspberry with the phone through a socket in order to send a message. We have edited some code from internet so as to fit our application (that code worked perfectly). We haven't done too many changes on that but we don't know why it's not working while even the methods and everything is the same. I've looked for the error but with no success. I've been reading something about asynchronous tasks but the other code that I wrote didn't work either. I publish the methods of the two classes I'm working on.
We want that when the method enviar() is called from a button of the layout get the info from a ListView, put everything in a string, open a socket, send the message and close the socket. The part of the string is completely well, but when it calls other classes' methods throws an exception that we don't know how to solve.
Note: the println-s are the particular way we have to debug the app. Don't hit us, please
Here is the code:
Method enviar
public void enviar(View view){
// get the row the clicked button is in
int i = 0;
String eskaera="";
Sockettest sckt = new Sockettest();
//Conectar
boolean conectstatus = sckt.Connect();
if (conectstatus) {//mostramos mensaje
System.out.println("Conexion OK ");
} else {//error al conectarse
//mostramos msg de error
System.out.println("Error.. ");
}
while (i < obtenerItems().size()) {
ListView lv = (ListView)findViewById(R.id.listViewBokatas);
LinearLayout lerroa = (LinearLayout) lv.getChildAt(i);
TextView bokata = (TextView) lerroa.getChildAt(0);
EditText kantitatea = (EditText) lerroa.getChildAt(2);
int balioa = Integer.parseInt(kantitatea.getText().toString());
if (balioa != 0) {
eskaera+=balioa + " X " + bokata.getText().toString() +"\n";
}
i++;
}
System.out.println(eskaera);
sckt.Snd_txt_Msg(eskaera);
sckt.Disconnect();
//return eskaera;
}
Class Sockettest
public class Sockettest {
/** Called when the activity is first created. */
Socket miCliente;
ObjectOutputStream oos;
ObjectInputStream ois;
Mensaje_data mdata;
//Conectamos
public boolean Connect() {
//Obtengo datos ingresados en campos
String IP = "viserion.no-ip.biz";
int PORT = Integer.valueOf("5555");
try {//creamos sockets con los valores anteriores
System.out.println("ERROR DE LOS GORDOS0");
miCliente = new Socket("viserion.no-ip.biz", 5555);
System.out.println("ERROR DE LOS GORDOS2");
//si nos conectamos
if (miCliente.isConnected() == true) {
return true;
} else {
System.out.println("ERROR DE LOS GORDOS");
return false;
}
} catch (Exception e) {
//Si hubo algun error mostrmos error
System.out.println("ERROR DE LOS GORDOS3");
Log.e("Error connect()", "" + e);
return false;
}
}
//Metodo de desconexion
public void Disconnect() {
try {
//Prepramos mensaje de desconexion
Mensaje_data msgact = new Mensaje_data();
msgact.texto = "";
msgact.last_msg = true;
//avisamos al server que cierre el canal
boolean val_acc = Snd_Msg(msgact);
if (!val_acc) {//hubo un error
System.out.println(" Error ");
Log.e("Disconnect() -> ", "!ERROR!");
} else {//ok nos desconectamos
System.out.println("Desconectado");
//camibmos led a rojo
Log.e("Disconnect() -> ", "!ok!");
//cerramos socket
miCliente.close();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//Envio mensaje de texto
public void Snd_txt_Msg(String txt) {
Mensaje_data mensaje = new Mensaje_data();
//seteo en texto el parametro recibido por txt
mensaje.texto = txt;
//no es el ultimo msg
mensaje.last_msg = false;
//mando msg
boolean val_acc = Snd_Msg(mensaje);
//error al enviar
if (!val_acc) {
System.out.println(" Error ");
Log.e("Snd_txt_Msg() -> ", "!ERROR!");
}
}
/*Metodo para enviar mensaje por socket
*recibe como parmetro un objeto Mensaje_data
*retorna boolean segun si se pudo establecer o no la conexion
*/
public boolean Snd_Msg(Mensaje_data msg) {
try {
//Accedo a flujo de salida
oos = new ObjectOutputStream(miCliente.getOutputStream());
//creo objeto mensaje
Mensaje_data mensaje = new Mensaje_data();
if (miCliente.isConnected())// si la conexion continua
{
//lo asocio al mensaje recibido
mensaje = msg;
//Envio mensaje por flujo
oos.writeObject(mensaje);
//envio ok
return true;
} else {//en caso de que no halla conexion al enviar el msg
System.out.println("Error...");//error
return false;
}
} catch (IOException e) {// hubo algun error
Log.e("Snd_Msg() ERROR -> ", "" + e);
return false;
}
}
}
The LogCat
03-26 21:48:45.636: I/System.out(27379): ERROR DE LOS GORDOS0
03-26 21:48:45.636: I/System.out(27379): ERROR DE LOS GORDOS3
03-26 21:48:45.636: E/Error connect()(27379): android.os.NetworkOnMainThreadException
03-26 21:48:45.636: I/System.out(27379): Error..
03-26 21:48:45.676: I/System.out(27379): 3 X Bacon-Queso
03-26 21:48:45.676: I/System.out(27379): 1 X Jamaica
03-26 21:48:45.676: D/AndroidRuntime(27379): Shutting down VM
03-26 21:48:45.676: W/dalvikvm(27379): threadid=1: thread exiting with uncaught exception (group=0x2b542210)
03-26 21:48:45.736: E/AndroidRuntime(27379): FATAL EXCEPTION: main
03-26 21:48:45.736: E/AndroidRuntime(27379): java.lang.IllegalStateException: Could not execute method of the activity
03-26 21:48:45.736: E/AndroidRuntime(27379): at android.view.View$1.onClick(View.java:3063)
03-26 21:48:45.736: E/AndroidRuntime(27379): at android.view.View.performClick(View.java:3534)
03-26 21:48:45.736: E/AndroidRuntime(27379): at android.view.View$PerformClick.run(View.java:14263)
03-26 21:48:45.736: E/AndroidRuntime(27379): at android.os.Handler.handleCallback(Handler.java:605)
03-26 21:48:45.736: E/AndroidRuntime(27379): at android.os.Handler.dispatchMessage(Handler.java:92)
03-26 21:48:45.736: E/AndroidRuntime(27379): at android.os.Looper.loop(Looper.java:137)
03-26 21:48:45.736: E/AndroidRuntime(27379): at android.app.ActivityThread.main(ActivityThread.java:4441)
03-26 21:48:45.736: E/AndroidRuntime(27379): at java.lang.reflect.Method.invokeNative(Native Method)
03-26 21:48:45.736: E/AndroidRuntime(27379): at java.lang.reflect.Method.invoke(Method.java:511)
03-26 21:48:45.736: E/AndroidRuntime(27379): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
03-26 21:48:45.736: E/AndroidRuntime(27379): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
03-26 21:48:45.736: E/AndroidRuntime(27379): at dalvik.system.NativeStart.main(Native Method)
03-26 21:48:45.736: E/AndroidRuntime(27379): Caused by: java.lang.reflect.InvocationTargetException
03-26 21:48:45.736: E/AndroidRuntime(27379): at java.lang.reflect.Method.invokeNative(Native Method)
03-26 21:48:45.736: E/AndroidRuntime(27379): at java.lang.reflect.Method.invoke(Method.java:511)
03-26 21:48:45.736: E/AndroidRuntime(27379): at android.view.View$1.onClick(View.java:3058)
03-26 21:48:45.736: E/AndroidRuntime(27379): ... 11 more
03-26 21:48:45.736: E/AndroidRuntime(27379): Caused by: java.lang.NullPointerException
03-26 21:48:45.736: E/AndroidRuntime(27379): at com.eetam.ibokata.Sockettest.Snd_Msg(Sockettest.java:103)
03-26 21:48:45.736: E/AndroidRuntime(27379): at com.eetam.ibokata.Sockettest.Snd_txt_Msg(Sockettest.java:87)
03-26 21:48:45.736: E/AndroidRuntime(27379): at com.eetam.ibokata.BokatasActivity.enviar(BokatasActivity.java:131)
03-26 21:48:45.736: E/AndroidRuntime(27379): ... 14 more
I believe in you guys! Thanks everyone is looking for a solution and I'll be very pleased for all of you. Thank you so much!
