conexao java: criando uma app android
DESCRIPTION
Palestra do Conexão Java 2012 relativa a criação de uma App Mobile.TRANSCRIPT
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Erich Egert
encontre-me:@erichegt
github.com/erichegt
Instrutor e desenvolvedor pela Caelum
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Erissssshhhhhh
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Criando uma app
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Por quêAndroid?
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0
37.5
75
112.5
150
2006 2007 2008 2009 2010 2011
Palm/webOS Symbian Windows MobileWindows Phone 7 RIM IOSAndroid
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Razões do sucesso?
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ADT
+
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public class Onibus { private String nome; private String linha;
//...}
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public class Onibus { private String nome; private String linha;
//...}
Jar
JVMMonday, May 28, 12
public class Onibus { private String nome; private String linha;
//...}
Jar
JVM
APK
DalvikMonday, May 28, 12
Váriosdispositivos
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Váriosdispositivos
APKSó pode
haver um!
Único
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AsyncTask
ExpandableListView
Adapter
LayoutInflater
LocationManager
MapActivity
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Vamos começar devagar...
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Emulador!!
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Olá Mundo!
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Hands on!
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Entendendo...
AndroidManifest.xml
main.xmlOlaMundoActivity?
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Estrutura doProjeto
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drawable
res
layout
valuesMonday, May 28, 12
drawable
res
layout
valuesMonday, May 28, 12
drawable
res
layout
valuesMonday, May 28, 12
drawable
res
layout
values
<resources>...
<string name="cor">COR:</string> <string name="modelo">MODELO:</string> <string name="opcionais">OPCIONAIS:</string> <string name="salvar">SALVAR</string></resources>
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wrap_content fill_parent
Tamanho?
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Manipulandoa tela
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comportamento
public class OnibusActivity extends Activity {
@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main);
//muitas coisas legais aqui! }}
Activity
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comportamento
public class OnibusActivity extends Activity {
@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main);
//muitas coisas legais aqui! }}
Activity aparência
XML
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findViewById( )
onCreate( )
Activity XML
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findViewById( )
onCreate( )
Activity XML
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Hands on!
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Listagem?
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ListView
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Como?
List<PontoDeOnibus>
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Adapter
Objeto View
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new ArrayAdapter<PontoDeOnibus>(context, layout, lista);
Activity
layout
dados
List<PontoDeOnibus>
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layoutlinha.xml
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Hands on!
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O visual é importante!
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Hands on!
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Tudo espalhado?
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styles.xml
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Hands on!
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E se...
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Tem como?!
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SIM!!!Monday, May 28, 12
ApplicationResources
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Hands on!
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JSON
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String json = //...
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INTERNET
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INTERNET
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AndroidManifest.xml
INTERNET
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AndroidManifest.xml
INTERNET
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A reposta do server?
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JSON!!{ "linha": "1018-10", "nome": "Vila Rosa - Metrô Santana", "pontos" : [
{ "nome": "920016054", "descricao": "R. Dr. Neto De Araujo, 311", "coordenada": { "latitude": -23.5876, "longitude": -46.6321
} }, { "nome": "920016364", "descricao": "R. Vergueiro, 3039", "coordenada": { "latitude": -23.5875, "longitude": -46.6336 } } ]}
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JSON
????
objetoÔnibus
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Quem poderá nos ajudar?
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Bibliotecas Marotas!Mark Murphy - The Commons Guy
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JSON
public class Onibus { private String nome; private String linha; private List<Ponto> pontos;
//...}
objetoÔnibus
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JSON
public class Onibus { private String nome; private String linha; private List<Ponto> pontos;
//...}
objetoÔnibus
GSON
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gson.jar
libs
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String json = //...
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String json = //...
Gson gson = new GsonBuilder().create();
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String json = //...
Onibus busao = gson.fromJson(json,Onibus.class);
Gson gson = new GsonBuilder().create();
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Hands on!
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Próximo desafio?
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Mapa?!?
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Tem como?!?
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MapActivity
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ItemizedOverlay
PontoDeOnibus OverlayItem
Coordenada GeoPoint
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Onde fazer a conversão?
Coordenada GeoPoint
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Utils?!
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Ensinamentos doAniche Skywalker
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public class Ponto { //...
public OverlayItem toOverlayItem() { return new OverlayItem( this.localizacao.toGeoPoint(),
"Localização:", this.descricao ); }}
public class Coordenada { private static final double CONVERSION_SCALE = 1E6;
//...
public GeoPoint toGeoPoint() { Double geoLat = this.latitude * CONVERSION_SCALE; Double geoLng = this.longitude * CONVERSION_SCALE; return new GeoPoint(geoLat.intValue(), geoLng.intValue()); }}
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Vamos testar??
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Hands on!
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instale!
confira o código fonte!
github/caelum/onibus-android
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instale!
confira o código fonte!
github/caelum/onibus-android
github/caelum/onibus-ios
Também na versão
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OBRIGADO!
@erichegtgithub.com/erichegt
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Activity Activity
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Activity Activity
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INTENT!
Activity Activity
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