The document discusses introducing Android development and provides an overview of key concepts for building Android apps such as activities, layouts, lists, JSON parsing, and mapping. It demonstrates how to structure an Android project, manipulate views and the screen, load and display data, handle user input, and integrate location-based APIs. Code samples and exercises are provided to help explain concepts hands-on.

1. Monday, May 28, 12

2. Erich Egert
Instrutor e desenvolvedor pela Caelum
encontre-me:
@erichegt
github.com/erichegt
Monday, May 28, 12

3. Erissssshhhhhh
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4. Monday, May 28, 12

5. Criando uma app
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6. Por quê
Android?
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7. 112.5
75
37.5
0
2006 2007 2008 2009 2010 2011
Palm/webOS Symbian Windows Mobile
Windows Phone 7 RIM IOS
Android
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8. Monday, May 28, 12

9. Monday, May 28, 12

10. Razões do sucesso?
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11. Monday, May 28, 12

12. Monday, May 28, 12

13. Monday, May 28, 12

14. +
ADT
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15. public class Onibus {
private String nome;
private String linha;
//...
}
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16. public class Onibus {
private String nome;
private String linha;
//...
}
Jar
JVM
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17. public class Onibus {
private String nome;
private String linha;
//...
}
Jar APK
JVM Dalvik
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18. Vários
dispositivos
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19. Único Só pode
haver um!
APK
Vários
dispositivos
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20. Adapter
AsyncTask
LayoutInflater
LocationManager
MapActivity ExpandableListView
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21. Monday, May 28, 12

22. Vamos começar
devagar...
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23. Emulador!!
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24. Olá Mundo!
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25. Hands on!
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26. AndroidManifest.xml
main.xml
? OlaMundoActivity
Entendendo...
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27. Estrutura do
Projeto
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28. res
drawable
layout
values
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29. res
drawable
layout
values
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30. res
drawable
layout
values
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31. res
drawable
<resources>
...
<string name="cor">COR:</string>
<string name="modelo">MODELO:</string>
<string name="opcionais">OPCIONAIS:</string>
layout
<string name="salvar">SALVAR</string>
</resources>
values
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32. Monday, May 28, 12

33. Tamanho?
wrap_content fill_parent
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34. Manipulando
a tela
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35. Activity
comportamento
public class OnibusActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//muitas coisas legais aqui!
}
}
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36. XML
Activity aparência
comportamento
public class OnibusActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//muitas coisas legais aqui!
}
}
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37. Activity XML
onCreate( )
findViewById( )
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38. Activity XML
onCreate( )
findViewById( )
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39. Hands on!
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40. Listagem?
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41. ListView
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42. Como?
List<PontoDeOnibus>
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43. Adapter
Objeto View
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44. List<PontoDeOnibus>
dados
new ArrayAdapter<PontoDeOnibus>(context, layout, lista);
Activity
layout
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45. layout
linha.xml
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46. Hands on!
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47. O visual é importante!
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48. Hands on!
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49. Tudo espalhado?
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50. styles.xml
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51. Hands on!
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52. E se...
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53. Monday, May 28, 12

54. Tem como?!
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55. SIM!!!
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56. Application
Resources
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57. Hands on!
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58. Monday, May 28, 12

59. Monday, May 28, 12

60. JSON
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61. String json = //...
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62. INTERNET
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63. INTERNET
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64. INTERNET
AndroidManifest.xml
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65. INTERNET
AndroidManifest.xml
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66. A reposta do
server?
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67. {
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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68. JSON
????
objeto
Ônibus
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69. Quem poderá nos
ajudar?
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70. Mark Murphy - The Commons Guy
Bibliotecas Marotas!
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71. JSON
public class Onibus {
private String nome;
private String linha;
objeto private List<Ponto> pontos;
Ônibus //...
}
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72. JSON
GSON
public class Onibus {
private String nome;
private String linha;
objeto private List<Ponto> pontos;
Ônibus //...
}
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73. gson.jar
libs
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74. String json = //...
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75. String json = //...
Gson gson =
new GsonBuilder().create();
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76. String json = //...
Gson gson =
new GsonBuilder().create();
Onibus busao =
gson.fromJson(json,Onibus.class);
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77. Hands on!
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78. Próximo
desafio?
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79. Mapa?!?
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80. Tem como?!?
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81. MapActivity
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82. ItemizedOverlay
PontoDeOnibus OverlayItem
Coordenada GeoPoint
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83. Onde fazer a
conversão?
Coordenada GeoPoint
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84. Utils?!
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85. Ensinamentos do
Aniche Skywalker
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86. 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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87. Vamos testar??
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88. Hands on!
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89. instale!
confira o
código fonte!
github/caelum/onibus-android
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90. instale!
confira o
código fonte!
github/caelum/onibus-android
Também na versão
github/caelum/onibus-ios
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91. OBRIGADO!
@erichegt
github.com/erichegt
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92. Activity Activity
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93. Activity Activity
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94. INTENT!
Activity Activity
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