CategoriasActivity.java

package com.geored.gui;

import java.util.ArrayList;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;

import android.os.AsyncTask;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ListView;

import com.geored.rest.R;
import com.geored.rest.ServicioRestUsuarios;
import com.geored.rest.data.Categoria;
import com.geored.rest.exception.NotFoundException;
import com.geored.rest.exception.RestBlowUpException;
import com.geored.rest.exception.UnauthorizedException;

public class CategoriasActivity extends GenericActivity {

	private ListView listView;
	private List<Categoria> data;
	private Button continuarButton;
	private CategoriaAdapter adapter;
	protected Hashtable<String, Categoria> hashCategorias = new Hashtable<String, Categoria>();


	
	protected void loadVista() {
		setContentView(R.layout.activity_categorias);
		data = new ArrayList<Categoria>();
		adapter = new CategoriaAdapter(this, R.layout.activity_categoria_item, data);
		listView = (ListView) findViewById(R.id.categoriaslistView);
		View header = (View) getLayoutInflater().inflate(
				R.layout.activity_categorias_footer_row, null);
		listView.addHeaderView(header);
		continuarButton = (Button) findViewById(R.id.continuarButton);
		continuarButton.setOnClickListener(new Button.OnClickListener() {
			public void onClick(View v) {
				progressBar.show();
				AgregarAsyncTask task = new AgregarAsyncTask();
				task.execute();
			}
		});
		listView.setAdapter(adapter);
		progressBar.show();
		GetCategoriasAsyncTask task = new GetCategoriasAsyncTask();
		task.execute();
	}

	private void continuar() throws RestBlowUpException, UnauthorizedException {
		Iterator<Categoria> it = adapter.getSelected().values().iterator();
		List<Integer> categorias = new ArrayList<Integer>();
		while (it.hasNext()) {
			Categoria cat = (Categoria) it.next();
			categorias.add(cat.getId());
		}
		ServicioRestUsuarios.agregarCategorias(categorias);
	}
	
	private void loadListView(List<Categoria> categorias) {
		try {
			hashUsuarios.clear();
			List<String> strs = new ArrayList<String>();
			if (categorias != null) {
				showToast(Integer.toString(categorias.size()));
				Iterator<Categoria> it = categorias.iterator();
				while (it.hasNext()) {
					Categoria cat = (Categoria) it.next();
					strs.add(cat.getNombre());
					hashCategorias.put(Integer.toString(cat.getId()), cat);
					data.add(cat);
				}
			} 
			else {
				showToast("Error: usuarios == null.");
			}
		} catch (Exception ex) {
			showToast(ex.getMessage());
		}
	}

	private class GetCategoriasAsyncTask extends AsyncTask<String, Void, List<Categoria>> {
		
		@Override
		protected List<Categoria> doInBackground(String... params) {
			List<Categoria> cat = null;
			try {
				cat = getCategorias();
			} catch (RestBlowUpException e) {
				e.printStackTrace();
				return null;
			} catch (UnauthorizedException e) {
				e.printStackTrace();
				return null;
			} catch (NotFoundException e) {
				e.printStackTrace();
				return null;
			}
			return cat;
		}

		@Override
		protected void onPostExecute(List<Categoria> result) {
			if (result != null) {
				showToast(Integer.toString(result.size()));
				loadListView(result);
			} else {
				showToast("Las categorias no se pudieron cargar.");
			}
			progressBar.dismiss();
			adapter.notifyDataSetChanged();
		}
		
		private List<Categoria> getCategorias() throws RestBlowUpException, UnauthorizedException, NotFoundException {
			List<Categoria> cat = ServicioRestUsuarios.getCategorias();
			return cat;
		}

	}
	
	private class AgregarAsyncTask extends AsyncTask<String, Void, String> {
	
		@Override
		protected String doInBackground(String... params) {
			try {
				continuar();
				return "Exito";
			} catch (RestBlowUpException e) {
				Log.e("Error", "Rest blow up!", e);
				return null;
			} catch (UnauthorizedException e) {
				Log.w("Warning", "Unautorized!", e);
				return null;
			} catch (Exception ex) {
				showToast("error al mandar el mensaje");
				return null;
			}
		}

		@Override
		protected void onPostExecute(String result) {
			if (result != null) {
				showToast("Categorias agregadas.");
			} else {
				showToast("Error al agregar las categorias.");
			}
			progressBar.dismiss();
			goToActivity(UsuarioActivity.class);
		}
		
	}

}