Código:
package com.example.taller06oct;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
public class BuscarEmpleado extends ListActivity {
String buscar;
private static final String TAG_BUSCAR = "buscar";
// Progress Dialog
private ProgressDialog pDialog;
// Creating JSON Parser object
JSONParser jParser = new JSONParser();
ArrayList<HashMap<String, String>> empleadosList;
private static String url_all_empleados = "http://200.55.233.93/android/busqueda.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_empleados = "empleados";
private static final String TAG_CEDULA = "cedula";
private static final String TAG_NOMBRE = "nombre";
private static final String TAG_APELLIDO = "apellido";
// empleados JSONArray
JSONArray empleados = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.all_empleados);
// getting Empleado details from intent
Intent i = getIntent();
// getting Empleado id (pid) from intent
buscar = i.getStringExtra(TAG_BUSCAR);
// Hashmap for ListView
empleadosList = new ArrayList<HashMap<String, String>>();
// Loading empleados in Background Thread
new LoadAllempleados().execute();
// Get listview
ListView lv = getListView();
// on seleting single Empleado
// launching Edit Empleado Screen
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String cedula = ((TextView) view.findViewById(R.id.cedula)).getText()
.toString();
// Starting new intent
Intent in = new Intent(getApplicationContext(),
EditEmpleadosActivity.class);
// sending pid to next activity
in.putExtra(TAG_CEDULA, cedula);
// starting new activity and expecting some response back
startActivityForResult(in, 100);
}
});
}
// Response from Edit Empleado Activity
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// if result code 100
if (resultCode == 100) {
// if result code 100 is received
// means user edited/deleted Empleado
// reload this screen again
Intent intent = getIntent();
finish();
startActivity(intent);
}
}
/**
* Background Async Task to Load all Empleado by making HTTP Request
* */
class LoadAllempleados extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(BuscarEmpleado.this);
pDialog.setMessage("Cargando Empleados. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting All empleados from url
* */
protected String doInBackground(String... args) {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("buscar", buscar));
// getting JSON string from URL
JSONObject json = jParser.makeHttpRequest(url_all_empleados, "GET", params);
// Check your log cat for JSON reponse
Log.d("All empleados: ", json.toString());
try {
// Checking for SUCCESS TAG
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// empleados found
// Getting Array of empleados
empleados = json.getJSONArray(TAG_empleados);
// looping through All empleados
for (int i = 0; i < empleados.length(); i++) {
JSONObject c = empleados.getJSONObject(i);
// Storing each json item in variable
String cedula = c.getString(TAG_CEDULA);
String nombre = c.getString(TAG_NOMBRE)+ " " +c.getString(TAG_APELLIDO);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_CEDULA, cedula);
map.put(TAG_NOMBRE, nombre);
// adding HashList to ArrayList
empleadosList.add(map);
}
} else {
// no empleados found
// Launch Add New Empleado Activity
Intent i = new Intent(getApplicationContext(),
NewEmpladoActivity.class);
// Closing all previous activities
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all empleados
pDialog.dismiss();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
BuscarEmpleado.this, empleadosList,
R.layout.list_item, new String[] { TAG_CEDULA,
TAG_NOMBRE },
new int[] { R.id.cedula, R.id.nombre });
// updating listview
setListAdapter(adapter);
}
});
}
}
}
