Tutorial Desarrollo de Aplicaciones en Android

< activity android:name=".SMSWriter">

Figura 32. Diagrama de secuencia para las conexiones con el servidor

public class ContactMap extends MapActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
// (...)
// Wi-Fi disponible
if (wifiEnabled==true){
// Crear un Intent asociado a la clase Update
Intent UpdateService = new Intent(this, Update.class);
// Lanzar Service
this.startService(UpdateService);
// Wi-Fi no disponible
}else{
// Lanzar aviso
// Obtener localizaciones desde SQLite
}
// (...)
}
}

public class Update extends Service{
// dirección del servidor
private String mServer = getResources().getString(R.string.server);
// temporizador de conexión
private int mTime = getResources().getInteger(R.integer.time_update);
// connexion HTTP
private HTTPConnection mHTTPConnection = new HTTPConnection(mServer);
// hilo que conectará periódicamente
public Thread mThread = new Thread(mTask);
@Override
public void onCreate() {
super.onCreate();
mThread.start();
}
Runnable mTask = new Runnable() {
public void run(){
while (true){
// Conectar con el servidor
mHTTPConnection.connect();
// Dormir el hilo 10 segundos
Thread.sleep(mTime);
}
}
};
}

package com.android.contactmap;
interface IRemoteCallback {
String notifyPreConnection();
void notifyPostConnection(String data);
}

package com.android.contactmap;
import com.android.contactmap.IRemoteCallback;
interface IRemoteRegister {
void register(IRemoteCallback regService);
void unRegister(IRemoteCallback regService);
}

public class ContactMap extends MapActivity {
// Lista de contactos
public ArrayList mFriendList = new ArrayList();
// Controlador del localizador GPS
private LocationManager mLocation = null;
// Gestor de intercambios con XML
private XMLExchange mXmlExchange = new XMLExchange();
private IRemoteCallback.Stub mCallback = new IRemoteCallback.Stub() {
public String notifyPreConnection() {
// Devolver petición XML
return mXmlExchange.writeXMLUpdate(
getContentResolver(),
(TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE),
mLocation.getLastKnownLocation(LocationManager.GPS_PROVIDER));
}
public void notifyPostConnection(String data) {
// Procesar respuesta XML
mXmlExchange.readXMLUpdate(
data, mFriendList, getContentResolver());
}
};
}

public class Update extends Service{
// Lista con interfaces remotas
private RemoteCallbackList mCallbacks =
new RemoteCallbackList();
private IRemoteRegister.Stub mRegister = new
IRemoteRegister.Stub(){
public void register(IRemoteCallback interface) {
// Guardar interfaz remota
if (interface!= null) mCallbacks.register(interface);
}
public void unRegister(IRemoteCallback interface) {
// Eliminar interfaz remota
if (interface!= null) mCallbacks.unregister(interface);
}
};
}

public class ContactMap extends MapActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
// (...)
// Wi-Fi disponible
if (wifiEnabled==true){
// Vincular el Service y la Activity actual
bindService(new Intent(IRemoteRegister.class.getName()),
mConnection, Context.BIND_AUTO_CREATE);
// Crear un Intent asociado a la clase Update
Intent UpdateService = new Intent(this, Update.class);
// Lanzar Service
this.startService(UpdateService);
// Wi-Fi no disponible
}else{
// Lanzar aviso
// Obtener localizaciones desde SQLite
}
// (...)
}
}

< service android:name=".Update">
< intent-filter>
< action android:name="com.android.contactmap.IRemoteRegister" />
< /intent-filter>
< /service>

public class Update extends Service{
private IRemoteRegister.Stub mRegister = new
IRemoteRegister.Stub(){
// Aquí se implementan los métodos register() y unRegister()
}
@Override
public IBinder onBind(Intent intent) {
return mRegister;
}
}

public class ContactMap extends MapActivity {
// Interfaz remota de la clase Update
private IRemoteRegister mService = null;
// Interfaz remota de la clase ContactMap
private IRemoteCallback.Stub mCallback = new IRemoteCallback.Stub() {
// Aquí se implementan los método notifyPreConnection() y
// notifyPostConnection()
};
private ServiceConnection mConnection = new ServiceConnection() {
public void onServiceConnected(ComponentName className,
IBinder service) {
// Obtener instacia gracias al stub
mService = IRemoteRegister.Stub.asInterface(service);
// Hacer llamada remota: registrar instancia de IRemoteCallback
mService.register(mCallback);
}
public void onServiceDisconnected(ComponentName className) {
mService = null;
}
};
}

public class Update extends Service{
// connexion HTTP
private HTTPConnection mHTTPConnection = new HTTPConnection(mServer);
// hilo que conectará periódicamente
public Thread mThread = new Thread(mTask);
Runnable mTask = new Runnable() {
public void run()
{
// Mientras dure el Service
while (true){
// Activar mCallbacks
mCallbacks.beginBroadcast();
// Notificar a la clase ContactMap
mHTTPConnection.setDataOut(
mCallbacks.getBroadcastItem(0).notifyPreConnection());
// Conectar con el servidor
mHTTPConnection.connect();
// Notificar a la clase ContactMap
mCallbacks.getBroadcastItem(0).notifyPostConnection(
mHTTPConnection.getDataIn());
// Desactivar mCallbacks
mCallbacks.finishBroadcast();
// Dormir el hilo
Thread.sleep(mTime);
}
}
};
}

1. < ?xml version="1.0" encoding="utf-8"?>
2. < manifest xmlns:android="http://schemas.android.com/apk/res/android"
3. package="com.android.contactmap"
4. android:versionCode="1"
5. android:versionName="1.0.0">
6.
7. < uses-permission android:name="android.permission.READ_PHONE_STATE" />
8. < uses-permission android:name="android.permission.INTERNET" />
9. < uses-permission android:name="android.permission.READ_CONTACTS" />
10. < uses-permission android:name="android.permission.CALL_PHONE" />
11. < uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
12. < uses-permission android:name="android.permission.SEND_SMS" />
13. < uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
14.
15.
16.
17.
18. < application android:icon="@drawable/icon" android:label="@string/app_name">
19.
20. < uses-library android:name="com.google.android.maps" />
21.
22. < activity android:name=".ContactMap" android:label="@string/app_name">
23. < intent-filter>
24. < action android:name="android.intent.action.MAIN" />
25. < category android:name="android.intent.category.LAUNCHER" />
26. < /intent-filter>
27. < /activity>
28.
29. < activity android:name=".FriendListViewer">
30.
31. < activity android:name=".SMSWriter">
32.
33. < service android:name=".Update">
34. < intent-filter>
35. < action android:name="com.android.contactmap.IRemoteRegister" />
36. < /intent-filter>
37. < /service>
38.
39. < /application>
40.
41. < /manifest>