SUPERIORIDAD AÉREAEN APLICACIONES ANDROID

Saúl Díaz Gonzálezsaul@tuenti.com

Wi-Fi 802.11 N

Bluetooth 3.0 + HS

Near-Field Comm.

“¿Cómo mejorarlo? Le pondremos Bluetooth. ¡Todo es mejor con Bluetooth!”

-Sheldon Cooper

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Descubrimiento

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BluetoothAdapter

BluetoothDevice

BluetoothAdapter

BluetoothSocket

BluetoothServerSocket

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Clases clave

BLUETOOTHBLUETOOTH_ADMIN

mBtAdapter = BluetoothAdapter.getDefaultAdapter();

mBtAdapter == null?

Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);startActivityForResult(intent, REQUEST_ENABLE_BT);

Si

Activando el Bluetooth

DescubrimientoCliente Servidor

mBtAdapter.startDiscovery();Intent(BluetoothAdapter.

ACTION_REQUEST_DISCOVERABLE);Intent.putExtra(BluetoothAdapter.

EXTRA_DISCOVERABLE_DURATION,300);

IntentFilter(BluetoothDevice.ACTION_FOUND);

registerReceiver(mReceiver, filter);

intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);

ConexiónCliente Servidor

mBtAdapter.listenUsingRfcommWithServiceRecord(NAME, MY_UUID);

serverSocket.accept();

btDevice.createRfcommSocketToServiceRecord( MY_UUID);

clientSocket.connect();

in = socket.getInputStream();out = socket.getOutputStream();in.read(buffer) //Buffer is byte[]out.write(buffer)

“Cualquier tecnología lo suficientemente avanzada es indistinguible de la magia”

-Arthur C. Clarke

Android Beam

Write Read

NFC Tag

Header Payload

Identifier Length Type

NFC Data Exchange Format (NDEF)

Record1 Record2 ... RecordN

Requisitos NFC

NFC

Uses Permission Intent Filter

android.nfc.action.NDEF_DISCOVERED

Leer un mensaje NDEF

public void onNewIntent(Intent intent) { if (NfcAdapter.ACTION_NDEF_DISCOVERED. equals(intent.getAction())) { Parcelable[] rawMsgs = intent.

getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);

NdefMessage[] msgs; if (rawMsgs != null) { msgs = new NdefMessage[rawMsgs.length]; for (int i = 0; i < rawMsgs.length; i++) { msgs[i] = (NdefMessage) rawMsgs[i]; } }

//Process Messages }}

Opciones de dispatching

NFC ForegroundDispatch

Classic Intent Dispatch

Android AppRecord

mNfcAdapter.enableForegroundDispatch(...);

mNfcAdapter.disableForegroundDispatch(this);

NdefRecord.createApplicationRecord(“com.example.nfc.beam”);

Escribir en una Tag

private void write(Tag tag) throws IOException, FormatException {

NdefRecord[] records = { createRecord() }; NdefMessage message = new NdefMessage(records);

// Get an instance of Ndef for the tag. Ndef ndef = Ndef.get(tag);

// Enable I/O ndef.connect();

// Write the message ndef.writeNdefMessage(message);

// Close the connection ndef.close();}

Android Beam

public class BluetoothChat extends Activity implements CreateNdefMessageCallback{

@Overridepublic NdefMessage createNdefMessage(NfcEvent event) {

try {NdefRecord[] records = { createRecord() };NdefMessage message = new NdefMessage(records);

return message;} catch (UnsupportedEncodingException e) {

//Handle error here}return null;

}

Demo time!

“Chuck Norris puede estrangular a un hombre con el cable de una conexión Wi-Fi.”

-Proverbio chino

BT 2.1 WiFi 11g WiFi 11n

1x

28x

200x

BT 3.0+HS

12x

Group Owner

Peers

Ice CreamSandwich

Permisos

ACCESS_WIFI_STATECHANGE_WIFI_STATE

CHANGE_NETWORK_STATEINTERNET

ACCESS_NETWORK_STATE

Requisitos Wi-Fi Direct

WIFI_P2P_CONNECTION_CHANGED_ACTION

WIFI_STATE_CHANGED_ACTION WIFI_P2P_PEERS_CHANGED_ACTION

WIFI_P2P_THIS_DEVICE_CHANGED_ACTION

Con un receiver voy sobrado

Listener Métodos Eventos

ActionListenerconnect(),

cancelConnect(),...onSuccess()onFailure()

ChannelListener initialize() onChannelDisconnected()

ConnectionInfoListener requestConnectInfo() onConnectionAvailable()

GroupInfoListener requestGroupInfo() onGroupInfoAvailable()

PeerListListener requestPeers() onPeersAvailable()

Y esto es todo lo que hay que saber

¡Peer a la vista!

mManager = (WifiP2pManager) getSystemService(Context.WIFI_P2P_SERVICE);

mChannel = mManager.initialize(this, getMainLooper(), null);mReceiver = new WiFiDirectBroadcastReceiver(mManager,mChannel,this); mManager.discoverPeers(channel, new WifiP2pManager.ActionListener() { @Override public void onSuccess() { //success logic }

@Override public void onFailure(int reasonCode) { //failure logic } });

if (WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION.equals(action)) { if (mManager != null) { mManager.requestPeers(mChannel, new PeerListListener(){

@Override public void onPeersAvailable(WifiP2pDeviceList list) { //Update Peer List, data model, etc... } }); }}

Mientras en el receiver...

WifiP2pDevice device = new WifiP2pDevice();WifiP2pConfig config = new WifiP2pConfig();config.deviceAddress = device.deviceAddress;mManager.connect(mChannel, config, new ActionListener() {

@Override public void onSuccess() { //ready for connecting through a socket }

@Override public void onFailure(int reason) { //failure logic }});

Frecuencias de llamadas abiertas

Superioridad aérea

Mágico

Sencillo

¡Muchas gracias!Saúl Díaz González

saul@tuenti.com@sefford