Código:
  
 package com.example;
public class EditEmpleadosActivity extends Activity {
	String cedula;
	String hora;
String cadenaObtenida;
	
	private ProgressDialog pDialog;
	JSONParser jsonParser = new JSONParser();
	private static final String url_detalles_empleado = "http://www.miweb.com/android/datosempleado.php";
	private static final String url_actualizar_empleado = "http://www.miweb.com/android/actualizarempleado.php";
	
	private static final String url_borrar_empleado = "http://www.miweb.com/android/borrarempleado.php";
	// JSON Node names
	private static final String TAG_SUCCESS = "success";
	private static final String TAG_FECHA = "fecha";
	private static final String TAG_HORA = "hora";
	private static final String TAG_CEDULA1 = "cedu";
	private static final String TAG_MAIL = "mail";
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.edit_empleado);
Bundle recogerDatos=getIntent().getExtras();
cadenaObtenida=recogerDatos.getString("resultado");
		// save button
		btnSave = (Button) findViewById(R.id.btnSave);
		btnDelete = (Button) findViewById(R.id.btnDelete);
		// getting Empleado details from intent
		Intent i = getIntent();
		
		// getting Empleado id (pid) from intent
		cedula = i.getStringExtra(TAG_CEDULA);
		//hora = i.getStringExtra(TAG_CEDULA);
		// Getting complete Empleado details in background thread
		new GetEmpleadoDetails().execute();
		// save button click event
		btnSave.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View arg0) {
				// starting background task to update Empleado
				new SaveEmpleadoDetails().execute();
			}
		});
		// Delete button click event
		btnDelete.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View arg0) {
				// deleting Empleado in background thread
				new DeleteEmpleado().execute();
			}
		});
	}
	/**
	 * Background Async Task to Get complete Empleado details
	 * */
	class GetEmpleadoDetails extends AsyncTask<String, String, String> {
		/**
		 * Before starting background thread Show Progress Dialog
		 * */
		@Override
		protected void onPreExecute() {
			super.onPreExecute();
			pDialog = new ProgressDialog(EditEmpleadosActivity.this);
			pDialog.setMessage("Espere por favor...");
			pDialog.setIndeterminate(false);
			pDialog.setCancelable(true);
			pDialog.show();
		}
		/**
		 * Getting Empleado details in background thread
		 * */
		protected String doInBackground(String... params) {
			// updating UI from Background Thread
			runOnUiThread(new Runnable() {
				public void run() {
					// Check for success tag
					int success;
					try {
						// Building Parameters
						List<NameValuePair> params = new ArrayList<NameValuePair>();
						params.add(new BasicNameValuePair("cedula", cedula));
						// getting Empleado details by making HTTP request
						// Note that Empleado details url will use GET request
						JSONObject json = jsonParser.makeHttpRequest(
								url_detalles_empleado, "GET", params);
						// check your log for json response
						Log.d("Single Empleado Details", json.toString());
						
						// json success tag
						success = json.getInt(TAG_SUCCESS);
						if (success == 1) {
							// successfully received Empleado details
							JSONArray EmpleadoObj = json
									.getJSONArray(TAG_EMPLEADOS); // JSON Array
							
							// get first Empleado object from JSON Array
							JSONObject Empleado = EmpleadoObj.getJSONObject(0);
							// Empleado with this pid found
							// Edit Text
							lblcedula = (TextView) findViewById(R.id.lblcedula);
							//lblfecha = (TextView) findViewById(R.id.lblfecha);
							txtNombre = (EditText) findViewById(R.id.inputNombre);
							txtApellido = (EditText) findViewById(R.id.inputApellido);
							txtSueldo = (EditText) findViewById(R.id.inputSueldo);
							lblfecha = (TextView) findViewById(R.id.lblfecha);
							lblmail = (EditText) findViewById(R.id.mail);
							// display Empleado data in EditText
							lblcedula.setText(Empleado.getString(TAG_FECHA));
							//txtNombre.setText(Empleado.getString(TAG_NOMBRE));
							txtApellido.setText(Empleado.getString(TAG_APELLIDO));
							//txtSueldo.setText(Empleado.getString(TAG_SUELDO));
							//lblfecha.setText(Empleado.getString(TAG_APELLIDO));
							lblfecha.setText("  Hora: "+cedula+"       Fecha: "+Empleado.getString(TAG_FECHA));
						}else{
							// Empleado with pid not found
						}
					} catch (JSONException e) {
						e.printStackTrace();
					}
				}
			});
			return null;
		}
		/**
		 * After completing background task Dismiss the progress dialog
		 * **/
		protected void onPostExecute(String file_url) {
			// dismiss the dialog once got all details
			pDialog.dismiss();
		}
	}
	/**
	 * Background Async Task to  Save Empleado Details
	 * */
	class SaveEmpleadoDetails extends AsyncTask<String, String, String> {
		/**
		 * Before starting background thread Show Progress Dialog
		 * */
		@Override
		protected void onPreExecute() {
			super.onPreExecute();
			pDialog = new ProgressDialog(EditEmpleadosActivity.this);
			pDialog.setMessage("Registrando su Cita Médica...");
			pDialog.setIndeterminate(false);
			pDialog.setCancelable(true);
			pDialog.show();
		}
		/**
		 * Saving Empleado
		 * */
		protected String doInBackground(String... args) {
			Log.e("1","llega a asycntask");
			// getting updated data from EditTexts
			
			
			String mail = lblmail.getText().toString();
			// Building Parameters
			List<NameValuePair> params = new ArrayList<NameValuePair>();
			params.add(new BasicNameValuePair(TAG_FECHA, fecha));//si
			params.add(new BasicNameValuePair(TAG_NOMBRE, nombre));//si
			params.add(new BasicNameValuePair(TAG_APELLIDO, apellido));//si
			params.add(new BasicNameValuePair(TAG_CEDULA1, cedu));
			params.add(new BasicNameValuePair(TAG_HORA,cedula));
			params.add(new BasicNameValuePair(TAG_MAIL,mail));
			//params.add(new BasicNameValuePair("fecha", fech));
			// sending modified data through http request
			// Notice that update Empleado url accepts POST method
			Log.e("1","entra a json");
			JSONObject json = jsonParser.makeHttpRequest(url_actualizar_empleado,
					"POST", params);
			Log.e("1","sale de json");
			// check json success tag
			try {
				int success = json.getInt(TAG_SUCCESS);
				
				if (success == 1) {
					// successfully updated
					Intent i = getIntent();
					// send result code 100 to notify about Empleado update
					setResult(100, i);
					finish();
				} else {
					// failed to update Empleado
				}
			} catch (JSONException e) {
				e.printStackTrace();
			}
			return null;
		}
		/**
		 * After completing background task Dismiss the progress dialog
		 * **/
		protected void onPostExecute(String file_url) {
			// dismiss the dialog once Empleado uupdated
			pDialog.dismiss();
		}
	}
	/*****************************************************************
	 * Background Async Task to Delete Empleado
	 * */
	class DeleteEmpleado extends AsyncTask<String, String, String> {
		/**
		 * Before starting background thread Show Progress Dialog
		 * */
		@Override
		protected void onPreExecute() {
			super.onPreExecute();
			pDialog = new ProgressDialog(EditEmpleadosActivity.this);
			pDialog.setMessage("Borrando Empleado...");
			pDialog.setIndeterminate(false);
			pDialog.setCancelable(true);
			pDialog.show();
		}
		/**
		 * Deleting Empleado
		 * */
		protected String doInBackground(String... args) {
			// Check for success tag
			int success;
			try {
				// Building Parameters
				List<NameValuePair> params = new ArrayList<NameValuePair>();
				params.add(new BasicNameValuePair("cedula", cedula));
				// getting Empleado details by making HTTP request
				JSONObject json = jsonParser.makeHttpRequest(
						url_borrar_empleado, "POST", params);
				// check your log for json response
				Log.d("Borrando Empleado", json.toString());
				
				// json success tag
				success = json.getInt(TAG_SUCCESS);
				if (success == 1) {
					// Empleado successfully deleted
					// notify previous activity by sending code 100
					Intent i = getIntent();
					// send result code 100 to notify about Empleado deletion
					setResult(100, i);
					finish();
				}
			} catch (JSONException e) {
				e.printStackTrace();
			}
			return null;
		}
		/**
		 * After completing background task Dismiss the progress dialog
		 * **/
		protected void onPostExecute(String file_url) {
			// dismiss the dialog once Empleado deleted
			pDialog.dismiss();
		}
	}
}
 


