Android basico

Android Bootcamp Douglas Drumond douglas@eee19.comSaturday, February 18, 12

eu.about()Saturday, February 18, 12

eu.about() • TécnicoSaturday, February 18, 12

eu.about() • Técnico • (pseudo)MatemáticoSaturday, February 18, 12

eu.about() • Técnico • (pseudo)Matemático • Bacharel em Ciência da ComputaçãoSaturday, February 18, 12

eu.about() • Técnico • (pseudo)Matemático • Bacharel em Ciência da Computação • Analista de software no Instituto de Pesquisas EldoradoSaturday, February 18, 12

@Eldorado Aplicações Framework Bibliotecas Dalvik Linux KernelSaturday, February 18, 12

@Eldorado Aplicações FrameworkBibliotecas Dalvik Linux Kernel BPSaturday, February 18, 12

Hoje http://www.ﬂickr.com/photos/natalielucier/3619749009/Saturday, February 18, 12

http://www.gtugs.org/Saturday, February 18, 12

http://www.ﬂickr.com/photos/donkeyhotey/5666071828/Saturday, February 18, 12

FerramentasSaturday, February 18, 12

Pré-requisitos • JDK • Android SDKSaturday, February 18, 12

Sistema Operacional • Linux • Mac OS X (Intel) • Windows XP ou superiorSaturday, February 18, 12

Ferramentas • Remote debugger • logcat • DDMSSaturday, February 18, 12

Livre • the deﬁnition of open: "mkdir android ; cd android ; repo init -u git:// android.git.kernel.org/platform/ manifest.git ; repo sync ; make" http://twitter.com/#!/arubin/status/27808662429Saturday, February 18, 12

ArquiteturaSaturday, February 18, 12

Arquitetura Linux KernelSaturday, February 18, 12

Arquitetura Bibliotecas Dalvik Linux KernelSaturday, February 18, 12

Arquitetura Framework Bibliotecas Dalvik Linux KernelSaturday, February 18, 12

Arquitetura Aplicações Framework Bibliotecas Dalvik Linux KernelSaturday, February 18, 12

Dissecando as AplicaçõesSaturday, February 18, 12

ActivitySaturday, February 18, 12

ServiceSaturday, February 18, 12

Content ProviderSaturday, February 18, 12

IntentSaturday, February 18, 12

Broadcast Receiver • Não possui interface (com usuário) • Roda em segundo plano • Reage a mensagens de broadcast • Exemplo: carga de bateriaSaturday, February 18, 12

Activity • Interface • Um objetivo • Várias por aplicativo • Pode iniciar outras activitiesSaturday, February 18, 12

Activity • 3 estados: ativa, em pausa e parada • 3 ciclos de vida • pode morrer a qualquer momento se não estiver ativaSaturday, February 18, 12

ActivitySaturday, February 18, 12

Activity onCreate()Saturday, February 18, 12

Activity onCreate() onStart()Saturday, February 18, 12

Activity onCreate() onStart() onResume()Saturday, February 18, 12

Activity onCreate() onStart() onResume() em execuçãoSaturday, February 18, 12

Activity onCreate() onStart() onResume() em execução onPause()Saturday, February 18, 12

Activity onCreate() onStart() Primeiro plano onResume() em execução onPause()Saturday, February 18, 12

Activity onCreate() onStart() Primeiro plano onResume() em execução onPause() onStop()Saturday, February 18, 12

Activity onCreate() onStart() onRestart() Primeiro plano onResume() em execução onPause() onStop()Saturday, February 18, 12

Activity onCreate() Visível onStart() onRestart() Primeiro plano onResume() em execução onPause() onStop()Saturday, February 18, 12

Activity onCreate() Visível onStart() onRestart() Primeiro plano onResume() em execução onPause() onStop() onDestroy()Saturday, February 18, 12

Activity onCreate() Visível onStart() onRestart() Primeiro plano onResume() em execução onPause() onStop() onDestroy() shutdownSaturday, February 18, 12

Activity Ciclo de vida completo onCreate() Visível onStart() onRestart() Primeiro plano onResume() em execução onPause() onStop() onDestroy() shutdownSaturday, February 18, 12

MultitarefaSaturday, February 18, 12

Multitarefa onCreate()Saturday, February 18, 12

Multitarefa onPause()Saturday, February 18, 12

MultitarefaSaturday, February 18, 12

Multitarefa onResume()Saturday, February 18, 12

Multitarefa onPause()Saturday, February 18, 12

Multitarefa onStop()Saturday, February 18, 12

Multitarefa onStop() onCreate()Saturday, February 18, 12

Multitarefa onStop() onCreate() onPause()Saturday, February 18, 12

Multitarefa onStop() onCreate() onPause() onStop()Saturday, February 18, 12

Multitarefa onStop() onCreate() onCreate() onPause() onStop()Saturday, February 18, 12

Multitarefa onStop() onCreate() onCreate() onPause() onRestart() onStop()Saturday, February 18, 12

Multitarefa onStop() onCreate() onCreate() onPause() onRestart() onStop() onStart()Saturday, February 18, 12

Prática • Criar uma aplicação com os métodos onCreate(), onStart(), onResume(), onPause(), onStop(), onDestroy() e onRestart() • Colocar logs nesses métodos e observar o que aconteceSaturday, February 18, 12

UI • Hierarquia de ViewGroups e ViewsSaturday, February 18, 12

View Group View Group View View View View View http://developer.android.com/guide/topics/ui/how-android- draws.htmlSaturday, February 18, 12

Layout <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <TextView android:id="@+id/text" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Hello, I am a TextView" /> <Button android:id="@+id/my_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Hello, I am a Button" /> </LinearLayout> http://developer.android.com/Saturday, February 18, 12

Layout public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main_layout); } Button myButton = (Button) findViewById(R.id.my_button); http://developer.android.com/Saturday, February 18, 12

Layout • FrameLayout • LinearLayout • TableLayout • RelativeLayoutSaturday, February 18, 12

Eventos • Deﬁnir um listener e registrá-lo com a View • Sobrecarregar um método de callback na ViewSaturday, February 18, 12

Listeners • onClick() → View.OnClickListener • onLongClick() → View.OnLongClickListener • onFocusChange() → View.OnFocusChangeListener • onKey() → View.OnKeyListener • onTouch() → View.OnTouchListener • onCreateContextMenu() → View.OnCreateContextMenuListenerSaturday, February 18, 12

Listeners // Create an anonymous implementation of OnClickListener private OnClickListener mCorkyListener = new OnClickListener() { public void onClick(View v) { // do something when the button is clicked } }; protected void onCreate(Bundle savedValues) { ... // Capture our button from layout Button button = (Button)findViewById(R.id.corky); // Register the onClick listener with the implementation above button.setOnClickListener(mCorkyListener); ... } http://developer.android.com/Saturday, February 18, 12

Listeners public class ExampleActivity extends Activity implements OnClickListener { protected void onCreate(Bundle savedValues) { ... Button button = (Button)findViewById(R.id.corky); button.setOnClickListener(this); } // Implement the OnClickListener callback public void onClick(View v) { // do something when the button is clicked } ... } http://developer.android.com/Saturday, February 18, 12

Intents • Comunicação intra e inter app de um jeito amigável e inteligente • Serve para iniciar activities, services e broadcast receiversSaturday, February 18, 12

Intents • Possui um alvo facultativo • Se não tiver especiﬁcado alvo, o sistema encontra um • Pode executar uma Activity ou Service especíﬁco • IntentFiltersSaturday, February 18, 12

Intents • Component name • Action • Data • Category • Extras • FlagsSaturday, February 18, 12

Intents Constante Alvo Ação ACTION_CALL activity Inicia uma ligação ACTION_EDIT activity Apresenta dados a serem editados ACTION_MAIN activity Activity inicial ACTION_SYNC activity Sincroniza dados com servidor ACTION_BATTERY_LOW broadcast receiver Aviso de bateria fraca ACTION_HEADSET_PLUG broadcast receiver Um fone de ouvido foi conectado ou desconectado ACTION_SCREEN_ON broadcast receiver A tela foi ligada (acesa) ACTION_TIMEZONE_CHANGED broadcast receiver Conﬁgurações de timezone modiﬁcadasSaturday, February 18, 12

Intent ﬁlter <intent-filter . . . > <action android:name="com.example.project.SHOW_CURRENT" /> <action android:name="com.example.project.SHOW_RECENT" /> <action android:name="com.example.project.SHOW_PENDING" /> . . . </intent-filter> <intent-filter . . . > <data android:mimeType="video/mpeg" android:scheme="http" . . . /> <data android:mimeType="audio/mpeg" android:scheme="http" . . . /> . . . </intent-filter> http://developer.android.com/Saturday, February 18, 12

http://developer.android.com/ http://developer.android.com/ resources/browser.html?tag=tutorialSaturday, February 18, 12

ObrigadoSaturday, February 18, 12

Android basico

by Douglas Drumond

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