Adrian Hernandez Islas's questions

I have the following code and I want to retrieve the id of a list of only option but when using the method getStringExtra("indice")the data isnull

Does anyone know how to fix it please? The code is the following:

public class MainActivity extends AppCompatActivity{

    private TextView ePromCliSuc,eTimePromSis,eClientesFila,eTimeEspera;
    private String data[];
    private ImageView img1,img2,img3,img4;
    private Hilo hilo;
    private int idHora;
    private ImageButton btnSalir,btnInfo;
    private final String[] horas = {"9:00 - 10:00 ","10:00 - 11:00","11:00 - 12:00",
                                    "12:00 - 13:00", "13:00 - 14:00","14:00 - 15:00","15:00 - 16:00",
                                    "17:00 - 18:00","18:00 - 19:00","19:00 - 20:00"};
    private final String Mensaje = "QueueSimulation es una aplicación cliente " +
                                    "diseñada para recibir datos de la simulacion " +
                                    "de lineas de espera en tiempo.\nAutores: "+
                                    "\nAntonio Lopez Aurelio\nHernandez Islas Adrian";


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        asigna();
        actionImagen();
        IntentFilter filtro1 = new IntentFilter(ReceptorOperacion.ACTION_RESP);
        filtro1.addCategory(Intent.CATEGORY_DEFAULT);
        registerReceiver(new ReceptorOperacion(), filtro1);
        hilo = new Hilo();
        hilo.start();

    }

    public void asigna(){
        ePromCliSuc = (TextView) findViewById(R.id.ePromCliSu);
        eTimePromSis = (TextView) findViewById(R.id.eTimeProm);
        eClientesFila = (TextView) findViewById(R.id.eClientesEnFila);
        eTimeEspera = (TextView) findViewById(R.id.eTimeEspera);
        btnSalir = (ImageButton) findViewById(R.id.imageButton2);
        btnInfo = (ImageButton) findViewById(R.id.imageButton3);
        img1 = (ImageView) findViewById(R.id.imageView2);
        img2 = (ImageView) findViewById(R.id.imageView);
        img3 = (ImageView) findViewById(R.id.imageView3);
        img4 = (ImageView) findViewById(R.id.imageView4);


    }

    public void actionImagen(){
        img1.setBackgroundResource(R.drawable.animereloj);
        AnimationDrawable frameAnimation1 = (AnimationDrawable) img1.getBackground();

        img2.setBackgroundResource(R.drawable.animeprom);
        AnimationDrawable frameAnimation2 = (AnimationDrawable) img2.getBackground();

        img3.setBackgroundResource(R.drawable.animecola);
        AnimationDrawable frameAnimation3 = (AnimationDrawable) img3.getBackground();

        img4.setBackgroundResource(R.drawable.animetimeaprox);
        AnimationDrawable frameAnimation4 = (AnimationDrawable) img4.getBackground();

        frameAnimation1.start();
        frameAnimation2.start();
        frameAnimation3.start();
        frameAnimation4.start();
    }
     //Este metodo es el que guarda el valor
    public void pasarDato(int id){
        Intent aux = new Intent(this,IntenteServiceOperacion.class);
        aux.putExtra("indice",id);

    }

    public void salir(View v){
            finish();
    }

    public void info(View z){
        AlertDialog.Builder alerta = new AlertDialog.Builder(MainActivity.this);
        alerta.setMessage(Mensaje)
                .setCancelable(false)
                .setPositiveButton("Aceptar", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        dialogInterface.cancel();
                    }
                });
        AlertDialog dialogo = alerta.create();
        dialogo.setTitle("Información");
        dialogo.show();
    }

    public void eligeHora(View z){

        AlertDialog.Builder dialogo = new AlertDialog.Builder(MainActivity.this);


        dialogo.setTitle("Selecciona Hora")
        .setItems(horas, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                //Este metodo lo utilizo para guardar el dato seleccionado
                pasarDato(i);

            }
        });
        dialogo.create().show();
    }

    public void RecibeMensaje(){
        Intent intento = new Intent(this,IntenteServiceOperacion.class);
        startService(intento);
    }

    class ReceptorOperacion extends BroadcastReceiver {
        public static final String ACTION_RESP = "mx.edu.itoaxaca.intent.action.RESPUESTA_OPERACION";
        @Override
        public void onReceive(Context context, Intent intent) {
            String textoRes = intent.getStringExtra("respuesta");
            if(textoRes != null){
                asignarDatos(textoRes);
            }
        }

        public void asignarDatos(String datos){
            if(datos.length()>0) {
                data = datos.split(",");
                ePromCliSuc.setText(data[0]+" Clientes");
                eTimePromSis.setText(data[1]+" Seg.");
                eClientesFila.setText(data[2]+" Clientes");
                eTimeEspera.setText(data[3]+" Seg.");
            }
        }
    }

    class Hilo extends Thread{
        @Override
        public void run() {
            while (true){
                try {
                    RecibeMensaje();
                    sleep(100);
                }catch (InterruptedException ex){

                }catch (Exception ex){}
            }
        }
    }
}

And I want to send it to this class:

public class IntenteServiceOperacion extends IntentService {

    private Socket socket;
    private BufferedReader entrada;
    private PrintWriter salida;
    private String mensaje,mnsjSalida;
    private Intent intento;
    private final String IP = "192.168.0.15";
    private final int PORT = 7;
    public IntenteServiceOperacion(String name){
        super("IntenteServiceOperacion");
    }

    public IntenteServiceOperacion(){
        super("");
    }

    @Override
    protected void onHandleIntent(Intent intent) {
            try{
                //Aqui es donde en teoria recupero el dato
                mnsjSalida = intent.getStringExtra("indice");
            }catch(Exception es){
                //Toast.makeTex,mnsjSalida,Toast.LENGTH_SHORT).show();
            }

            try {
                socket = new Socket(IP,PORT);
                entrada = new BufferedReader(new InputStreamReader(socket.getInputStream()));
                salida = new PrintWriter(new OutputStreamWriter(socket.getOutputStream()),true);
                salida.println(mnsjSalida);
                mensaje = entrada.readLine();


            }catch (IOException e){}
             catch (Exception ex){}
        intento = new Intent();
        intento.setAction(MainActivity.ReceptorOperacion.ACTION_RESP);
        intento.putExtra("respuesta",((mensaje == null)?"":mensaje));
        sendBroadcast(intento);
    }


}

My problem is the following:

I have a .csv file in which the attributes of an object are stored, which are: CP, Street, number, neighborhood, recipient I want to order these attributes based on the CP with the following code:

public class ExternalSort{

static int N = 2000000; /** size of the file in disk */
static int M = 100000;  /** max items the memory buffer can hold */

public static void externalSort(String fileName)
{
    String tfile = "temp-file-";
    int[] buffer = new int[M < N ? M : N];

    try
    {
        FileReader fr = new FileReader(fileName);
        BufferedReader br = new BufferedReader(fr);
        int slices = (int) Math.ceil((double) N/M);

        int i, j;
        i = j = 0;
        /** Iterar a través de los elementos del archivo */
        for (i = 0; i < slices; i++)
        {
            /** Leer fragmentos de M-elementos a la vez desde el archivo */
            for (j = 0; j < (M < N ? M : N); j++)
            {
                String t = br.readLine();
                if (t != null)
                    buffer[j] = Integer.parseInt(t.substring(0,4));
                else
                    break;
            }
            /** Sort M elementos */
            Arrays.sort(buffer);

            /** Escriba los números ordenados en el archivo temporal */
            FileWriter fw = new FileWriter(tfile + Integer.toString(i) + ".txt");
            PrintWriter pw = new PrintWriter(fw);
            for (int k = 0; k < j; k++)
                pw.println(buffer[k]);

            pw.close();
            fw.close();
        }

        br.close();
        fr.close();

        /** Ahora abra cada archivo y combinelos, luego vuelva a escribirlos en el disco */
        int[] topNums = new int[slices];
        BufferedReader[] brs = new BufferedReader[slices];

        for (i = 0; i < slices; i++)
        {
            brs[i] = new BufferedReader(new FileReader(tfile + Integer.toString(i) + ".txt"));
            String t = brs[i].readLine();
            if (t != null)
                topNums[i] = Integer.parseInt(t);
            else
                topNums[i] = Integer.MAX_VALUE;
        }

        FileWriter fw = new FileWriter("external-sorted.txt");
        PrintWriter pw = new PrintWriter(fw);

        for (i = 0; i < N; i++)
        {
            int min = topNums[0];
            int minFile = 0;

            for (j = 0; j < slices; j++)
            {
                if (min > topNums[j])
                {
                    min = topNums[j];
                    minFile = j;
                }
            }

            pw.println(min);
            String t = brs[minFile].readLine();
            if (t != null)
                topNums[minFile] = Integer.parseInt(t);
                else
                topNums[minFile] = Integer.MAX_VALUE;
        }
        for (i = 0; i < slices; i++)
            brs[i].close();

        pw.close();
        fw.close();
    } catch (FileNotFoundException e)
    {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } catch(NullPointerException ex){
        ex.printStackTrace();
    } 
}


static String generateInput(int n)
{
    String fileName = "external-sort.txt";
    Random rand = new Random();

    try
    {
        FileWriter fw = new FileWriter(fileName);
        PrintWriter pw = new PrintWriter(fw);

        for (int i = 0; i < n; i++)
            pw.println(rand.nextInt(9900) + 100);

        pw.close();
    }
    catch (IOException e)
    {
        e.printStackTrace();
    }

    return fileName;
}

It is supposed to return the file ordered based on the CP but it doesn't.

As an example I have the following data:

68148, Sur, 45, Real Casa Blanca (Residential), Juan Gabriel Contreras Caceres

68010, Sur, 57, Elsa (Subdivision), Tomas Prieto Jurado

68045, East, 144, Star (Cologne), Jorge Conde Prieto

And the ordered file should be like this:

68010, Sur, 57, Elsa (Subdivision), Tomas Prieto Jurado

68045, East, 144, Star (Cologne), Jorge Conde Prieto

68148, Sur, 45, Real Casa Blanca (Residential), Juan Gabriel Contreras Caceres

My problem is the following:

A certain type of bomb requires a detonator to activate. These bombs are made in such a way that only their detonator can activate them. This is done by making them have a different detonator and plug for each bomb.

You have in your possession 20 bombs with their respective 20 detonators. However, you don't know which detonator corresponds to which bomb and you need to know. You can't compare any detonator to any bomb, as for this you would need to plug them in and activate the bomb. You can only compare the detonators with each other, and the bombs with each other.

Take into account that in the locations from 1to 20are the sizes of the plugs of the bombs and from 21to to are the 40sizes of the detonators.

I have already solved it as follows (recursively):

public class DetonadorAndBomb {

    public static void bomb(int []a,int m,int n){
        if(a[m]==a[n+1]){
            System.out.println(a[n+1]);
            if(!(m==(n+1))){
                n=1;
                bomb(a,m+1,n);
            }

        } else{
            bomb(a,m,n+1);
        }
    }

    public static void main(String[] args) {
        int num[] = {1,3,3,1};
        bomb(num,0,1);
    }
}

And in the console it results:

1

3

3

It is not supposed to print the last value.