Mobile conf erich

Aplicações Flexíveise de fácil manutenção

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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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Primeira tela: listagem!

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De onde vêm os dados?

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JSON

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public class ListagemActivity extends Activity {//...

@Override protected void onCreate(Bundle bundle) { //...

try { HttpClient httpclient = new DefaultHttpClient();

HttpGet httpGet = new HttpGet(endereco); HttpResponse resp = httpclient.execute(httpGet);

String jsonCarros = EntityUtils.toString(resp.getEntity()); // colocar no ListView } catch (Exception e) { // ... }

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Quem roda?

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UIThread

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EM PARALELO!

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AsyncTask

UIThreadThread(tarefa pesada)

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e no fim da tarefa pesada?

JSON

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Tela!

UIThread

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AsyncTask

UIThread

Thread(tarefa pesada)

onPreExecute

doInBackground

UIThread onPostExecute

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AsyncTask

UIThread

Thread(tarefa pesada)

onPreExecute

doInBackground

UIThread onPostExecute

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public class BuscaCarrosTask extends AsyncTask<Void, Void, List<Carro>>{

//...

protected void onPostExecute(final List<Carro> result) {

ListView listaCarros = (...) activity.findViewById(...);

ArrayAdapter<Carro> adapter = new ArrayAdapter<Carro>(...); listaCarros.setAdapter(adapter); listaCarros.setOnItemClickListener(

new OnItemClickListener() { public void onItemClick(...) { Carro carroSelecionado = result.get(posicao);

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//...





UIThread

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//...





UIThread

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Task manipular tela?

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Acoplamento...

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Delegate

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Delegate

Activity

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Delegate

Activity

delega!

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Delegate

Activity AsyncTask

delega!

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Delegate

Activity AsyncTask

delega!

lida com resultado!

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//...





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//...





quemMeChamou.lidaComResultado(result);}

//... Delegate

Ipublic class BuscaCarrosTask( quemMeChamou) {..,}

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Tasks:DELEGATE

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Segunda tela: detalhes!

...

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Activity

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Activity

Intent

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Activity

Intent

Activity

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Activity

Intent

Activity“apelido”

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public void onItemClick(...) { Carro carro = result.get(posicao);

Intent irParaDetalhes = new Intent(this,DetalhesActivity.class); irParaDetalhes.putExtra("carroSelecionado",carro); }

Activity 1

Activity 2protected void onCreate(Bundle savedInstanceState) { TextView modelo = (TextView) findViewById(R.id.modelo); Carro carroSelecionado = (Carro) getIntent() .getSerializableExtra("carroSelecionado"); if (carroSelecionado != null) { modelo.setText(carroSelecionado.getModelo());

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public void onItemClick(...) { Carro carro = result.get(posicao);

Intent irParaDetalhes = new Intent(this,DetalhesActivity.class); irParaDetalhes.putExtra("carroSelecionado",carro); }

Activity 1

Activity 2protected void onCreate(Bundle savedInstanceState) { TextView modelo = (TextView) findViewById(R.id.modelo); Carro carroSelecionado = (Carro) getIntent() .getSerializableExtra("carroSelecionado"); if (carroSelecionado != null) { modelo.setText(carroSelecionado.getModelo());

“carroSelecionado”

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Constantes...

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Activity

Intent

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Activity

Intent

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Activity

Intent

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Activity

Intent

Dalvik

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Activity

Intent

DalvikDalvik

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Como passar deuma VM pra outra?

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Serializar...

0 11101

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Serializar na mesma VM...

0 11101

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Serializar na mesma VM...

0 11101

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Parceable

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Tem mais...

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Activity 2 em 1?

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Vamos dividir em pedaços!

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Fragment

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IF’s INFINITOS!

==

Fragment

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protected void onCreate(Bundle savedInstanceState) { //...

FragmentManager manager = getSupportFragmentManager();

FragmentTransaction transaction = manager.beginTransaction();

if (isTabletNaHorizontal()) {

transaction.replace(R.id.esquerda, new ListagemFragment()); transaction.replace(R.id.direita,

DetalhesFragment.fragmentComCarro(null));

} else { transaction.replace(R.id.unico, new ListagemFragment()); }

transaction.commit(); }

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protected void onCreate(Bundle savedInstanceState) { //...

FragmentManager manager = getSupportFragmentManager();

FragmentTransaction transaction = manager.beginTransaction();

if (isTabletNaHorizontal()) {

transaction.replace(R.id.esquerda, new ListagemFragment()); transaction.replace(R.id.direita,

DetalhesFragment.fragmentComCarro(null));

} else { transaction.replace(R.id.unico, new ListagemFragment()); }

transaction.commit(); }

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STRATEGY

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public class FabricaDeConteudo { public static Conteudo getConteudo(CarrosActivity activity) {

boolean ehTabletNaHorizontal = activity.getResources().getBoolean(R.bool.ehTabletNaHorizontal);

if (ehTabletNaHorizontal) { return new ConteudoTablet(activity); } else { return new ConteudoSmart(activity); } }}

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I

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I

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public class CarrosActivity extends FragmentActivity { private Conteudo conteudo;

@Override protected void onCreate(Bundle savedInstanceState) { //... conteudo = FabricaDeConteudo.getConteudo(this);

}

public void lidaComSelecaoDo(Carro carroSelecionado) {

conteudo.lidaComSelecaoDo(carroSelecionado);

}}

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}



}}

OU

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}



}}

OU

OU

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Fragments:Strategy!

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E como ganhar $ facil?

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Venda a mesmaapp varias vezes...

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AsyncTask

ExpandableListView

Adapter

LayoutInflater

LocationManager

MapActivity

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busao SP

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busao SP

busao AC

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busao SP

busao AC

busao UK

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Dar uma cara nova

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Plural de ônibus?

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Plural de ônibus?

ônibuses

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LÓGICA

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project librariesFriday, April 5, 13

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ApplicationResources

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values colors.xmlbackground_geral

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Reaproveitamento:Project Libraries!

Flexibilidade:Application Resources!

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comportamentosdiferentes

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Fragment

ajuda nesse caso?!?

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Fragment

ajuda nesse caso?!?

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Mas e a Activity?

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Activity

Intent

Dalvik Dalvik

Só serve pra...

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startActivity(this, UmaActivity.class );

Na mesma App...

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startActivity(???.class )

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startActivity(“apelido” )

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AndroidManifest

Activity

“apelido”

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Opis sou euzis!

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Intent Filters

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<activity android:name=".MussumActivity" android:label="@string/app_name" >

<intent-filter> <action android:name="android.intent.action.VIEW" /> <category android:name="android.intent.category.DEFAULT" />

<data android:host="localhost" android:pathPattern="/acao/customizada/mussum" android:scheme="busao" /> </intent-filter></activity>

AndroidManifest

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Intent i = new Intent(Intent.ACTION_VIEW);

i.setData(Uri.parse("busao://localhost/acao/customizada/"+ getResources().getString( R.string.tag_intent_implicita)));

startActivity(i);

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Baixo acoplamentoe integração:Intent Filters!

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OBRIGADO!

@erichegtgithub.com/erichegt

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ORM...

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