Android Background Jobs

gistfile1.java

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Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/ 
or send a letter to Creative Commons, 444 Castro Street, Suite 900, Mountain View, California, 94041, USA.*/

package com.leyendalabs.guarurapp.framents;

import java.util.ArrayList;
import java.util.List;

import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.provider.ContactsContract.Contacts;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.Toast;

import com.actionbarsherlock.app.SherlockFragment;
import com.actionbarsherlock.app.SherlockFragmentActivity;
import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuInflater;
import com.actionbarsherlock.view.MenuItem;
import com.leyendalabs.guarurapp.R;
import com.leyendalabs.guarurapp.Selecciona_Contactos;
import com.leyendalabs.guarurapp.base_de_datos.ContactosDataSource;
import com.leyendalabs.guarurapp.base_de_datos.ContactosNotificacionBean;
import com.leyendalabs.guarurapp.especiales.Contacto;
import com.leyendalabs.guarurapp.especiales.My_ListView_Contacts;

public class Fragment_Contactos extends SherlockFragment implements
		OnItemClickListener {

	private ViewGroup viewGroup;

	private final int ID_MENU_1 = 1;
	private final int ID_MENU_2 = 2;
	private int CODE = 10;
	private ListView lista_mostrar;
	private My_ListView_Contacts listView_Contacts;
	private ArrayList<Contacto> List_Contac;

	private ContactosDataSource dataSource;

	int indicador = 0;

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		viewGroup = (ViewGroup) inflater.inflate(R.layout.contactos, null,
				false);

		setHasOptionsMenu(true);
		return viewGroup;
	}

	@Override
	public void onActivityCreated(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onActivityCreated(savedInstanceState);

		dataSource = new ContactosDataSource(getSherlockActivity());

		lista_mostrar = (ListView) viewGroup.findViewById(R.id.listaconta);

		new Hilo_Muestras(getSherlockActivity()).execute();
	}

	@Override
	public void onActivityResult(int requestCode, int resultCode, Intent data) {
		// TODO Auto-generated method stub

		if (requestCode == CODE) {
			if (resultCode == SherlockFragmentActivity.RESULT_OK) {
				Toast.makeText(getSherlockActivity(), "Nuevos Contactos",
						Toast.LENGTH_SHORT).show();

//				dataSource = new ContactosDataSource(getSherlockActivity());
//
//				lista_mostrar = (ListView) viewGroup
//						.findViewById(R.id.listaconta);

				new Hilo_Muestras(getSherlockActivity()).execute();
			}
		}
	}

	@Override
	public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
		// TODO Auto-generated method stub
		super.onCreateOptionsMenu(menu, inflater);
		menu.clear();
		menu.add(0, ID_MENU_2, 0, "Borrar")
				.setIcon(R.drawable.borrar)
				.setShowAsAction(
						MenuItem.SHOW_AS_ACTION_IF_ROOM
								| MenuItem.SHOW_AS_ACTION_WITH_TEXT);
		menu.add(0, ID_MENU_1, 0, "AÒadir")
				.setIcon(R.drawable.anadir)
				.setShowAsAction(
						MenuItem.SHOW_AS_ACTION_IF_ROOM
								| MenuItem.SHOW_AS_ACTION_WITH_TEXT);

	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {

		switch (item.getItemId()) {
		case ID_MENU_1:
			Intent intent = new Intent(getSherlockActivity(),
					Selecciona_Contactos.class);
			startActivityForResult(intent, CODE);
			break;
		case ID_MENU_2:
			if (indicador > 0) {
				borrar();
			} else {
				Toast.makeText(getSherlockActivity(),
						"Seleccione un elemento para borrar ",
						Toast.LENGTH_SHORT).show();
			}
			break;
		}

		return super.onOptionsItemSelected(item);
	}

	private void crear_lista() {
		listView_Contacts = new My_ListView_Contacts(getSherlockActivity(),
				List_Contac);
		lista_mostrar.setAdapter(listView_Contacts);
		lista_mostrar.setOnItemClickListener(this);
	}

	@Override
	public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {

		if (List_Contac.get(arg2).getSeleccionado()) {
			List_Contac.get(arg2).setSeleccionado(false);
			indicador--;
		} else {
			List_Contac.get(arg2).setSeleccionado(true);
			indicador++;
		}

		listView_Contacts.notifyDataSetChanged();
	}

	private void borrar() {
		int i = 0;
		Contacto contacto;
		do {
			contacto = List_Contac.get(i);
			if (contacto.getSeleccionado()) {
				dataSource.borrarContacto(contacto.getlookup_key());
				List_Contac.remove(i);
			} else {
				i++;
			}
		} while (i < List_Contac.size());
		listView_Contacts.notifyDataSetChanged();
	}

	private class Hilo_Muestras extends AsyncTask<Void, Void, Boolean> {
		private SherlockFragmentActivity contexto;

		private List<ContactosNotificacionBean> arrayListBase;

		public Hilo_Muestras(SherlockFragmentActivity contexto) {
			// TODO Auto-generated constructor stub
			this.contexto = contexto;
			List_Contac = new ArrayList<Contacto>(); 
		}

		@Override
		protected Boolean doInBackground(Void... params) {

			arrayListBase = dataSource.obtenerContactos();

			if (arrayListBase.size() == 0) {
				return false;
			}

			Uri contactsUri = ContactsContract.Contacts.CONTENT_URI;
			Uri dataUri = ContactsContract.Data.CONTENT_URI;

			Cursor contactsCursor;
			Cursor dataCursor;
			String nombre = "";
			byte[] fotoByte = null;
			Bitmap bitmap = null;

			for (int i = 0; i < arrayListBase.size(); i++) {
				Log.d("String", arrayListBase.get(i).getIdContacto());
				contactsCursor = contexto.getContentResolver().query(
						contactsUri, null, Contacts.LOOKUP_KEY + "=?",
						new String[] { arrayListBase.get(i).getIdContacto() },
						null);

				if (contactsCursor.moveToFirst()) {
					long contactId = contactsCursor.getLong(contactsCursor
							.getColumnIndex(Contacts._ID));
					dataCursor = contexto.getContentResolver().query(dataUri,
							null, ContactsContract.Data.CONTACT_ID + "=?",
							new String[] { String.valueOf(contactId) }, null);

					if (dataCursor.moveToFirst()) {
						nombre = dataCursor
								.getString(dataCursor
										.getColumnIndex(ContactsContract.Data.DISPLAY_NAME));
						do {
							if (dataCursor
									.getString(
											dataCursor
													.getColumnIndex("mimetype"))
									.equals(ContactsContract.CommonDataKinds.Photo.CONTENT_ITEM_TYPE)) {
								fotoByte = dataCursor.getBlob(dataCursor
										.getColumnIndex("data15"));

								if (fotoByte != null) {
									bitmap = BitmapFactory.decodeByteArray(
											fotoByte, 0, fotoByte.length);
								}
								break;
							}

						} while (dataCursor.moveToNext());

					}

					dataCursor.close();

				}

				List_Contac.add(new Contacto(arrayListBase.get(i)
						.getIdContacto(), nombre, arrayListBase.get(i)
						.getNumero(), bitmap, false));
				nombre = "";
				bitmap = null;

				contactsCursor.close();
			}

			return true;
		}

		@Override
		protected void onPostExecute(Boolean result) {
			// TODO Auto-generated method stub
			super.onPostExecute(result);
			if (result) {
				crear_lista();
			} else {
				Toast.makeText(contexto, "No hay elemento que mostrar!!!",
						Toast.LENGTH_SHORT).show();
			}
		}

	}

}