<uses-permission android:name="android.permission.access_network_state" /> <uses-permission android:name="android.permission.

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1 FACULDADE DE TECNOLOGIA SENAC PELOTAS Curso Superior de Tecnologia em Análise e Desenvolvimento de Sistemas Tópicos Avançados em ADS Edécio Fernando Iepsen ================================== AndroidManifest.xml <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android=" package="br.com.edecio.listacarros"> <uses-permission android:name="android.permission.access_network_state" /> <uses-permission android:name="android.permission.internet" /> <application android:allowbackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsrtl="true" android:theme="@style/apptheme"> <activity android:name=".filtroactivity"> <intent-filter> <action android:name="android.intent.action.main" /> <category android:name="android.intent.category.launcher" /> </intent-filter> </activity> <activity android:name=".mainactivity" /> <activity android:name=".propostaactivity"></activity> </application> </manifest> Carro.java import java.io.serializable; public class Carro implements Serializable { public int id; public String modelo; public int ano; public Double preco; public String foto; public Carro() { public Carro(int id, String modelo, int ano, Double preco, String foto) { this.id = id; this.modelo = modelo; this.ano = ano; this.preco = preco; this.foto = foto; public String tostring() { return modelo; CarroHttp.java import android.content.context; import android.net.connectivitymanager; import android.net.networkinfo; import org.json.jsonarray; import org.json.jsonexception; import org.json.jsonobject;

2 import java.io.bytearrayoutputstream; import java.io.ioexception; import java.io.inputstream; import java.net.httpurlconnection; import java.net.url; import java.util.arraylist; import java.util.list; public class CarroHttp { public static final String CARROS_URL_JSON = " //public static final String CARROS_URL_JSON = " private static HttpURLConnection connectar(string urlarquivo) throws IOException { final int SEGUNDOS = 1000; URL url = new URL(urlArquivo); HttpURLConnection conexao = (HttpURLConnection)url.openConnection(); conexao.setreadtimeout(10 * SEGUNDOS); conexao.setconnecttimeout(15 * SEGUNDOS); conexao.setrequestmethod("get"); conexao.setdoinput(true); conexao.setdooutput(false); conexao.connect(); return conexao; public static boolean temconexao(context ctx) { ConnectivityManager cm = (ConnectivityManager) ctx.getsystemservice(context.connectivity_service); NetworkInfo info = cm.getactivenetworkinfo(); return (info!= null && info.isconnected()); public static List<Carro> carregarcarrosjson(string filtro) { try { HttpURLConnection conexao = connectar(carros_url_json+"?"+filtro); int resposta = conexao.getresponsecode(); if (resposta == HttpURLConnection.HTTP_OK) { InputStream is = conexao.getinputstream(); JSONObject json = new JSONObject(bytesParaString(is)); return lerjsoncarros(json); catch (Exception e) { e.printstacktrace(); return null; public static List<Carro> lerjsoncarros(jsonobject json) throws JSONException { List<Carro> listadecarros = new ArrayList<Carro>(); JSONArray jsoncarros = json.getjsonarray("carros"); for (int i = 0; i < jsoncarros.length(); i++) { JSONObject jsoncarro = jsoncarros.getjsonobject(i); Carro carro = new Carro( jsoncarro.getint("id"), jsoncarro.getstring("modelo"), jsoncarro.getint("ano"), jsoncarro.getdouble("preco"), jsoncarro.getstring("foto") ); listadecarros.add(carro); return listadecarros; private static String bytesparastring(inputstream is) throws IOException { byte[] buffer = new byte[1024]; // O bufferzao vai armazenar todos os bytes lidos ByteArrayOutputStream bufferzao = new ByteArrayOutputStream(); // precisamos saber quantos bytes foram lidos int byteslidos; // Vamos lendo de 1KB por vez... while ((byteslidos = is.read(buffer))!= -1) { // copiando a quantidade de bytes lidos do buffer para o bufferzão bufferzao.write(buffer, 0, byteslidos);

3 return new String(bufferzao.toByteArray(), "UTF-8"); CarrosListAdapter.java import android.content.context; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.widget.arrayadapter; import android.widget.imageview; import android.widget.textview; import com.squareup.picasso.picasso; import java.util.list; public class CarrosListAdapter extends ArrayAdapter<Carro>{ public static final String CARROS_URL_FOTO = " //public static final String CARROS_URL_FOTO = " public CarrosListAdapter(Context context, List<Carro> objects) { super(context, 0, objects); public View getview(int position, View convertview, ViewGroup parent) { Carro carro = getitem(position); ViewHolder holder; if (convertview == null) { convertview = LayoutInflater.from(getContext()).inflate( R.layout.item_carro_list, null); holder = new ViewHolder(); holder.imgfoto = (ImageView)convertView.findViewById(R.id.imgFoto); holder.txtmodelo = (TextView)convertView.findViewById(R.id.txtModelo); holder.txtpreco = (TextView)convertView.findViewById(R.id.txtPreco); holder.txtano = (TextView)convertView.findViewById(R.id.txtAno); holder.txtid = (TextView)convertView.findViewById(R.id.txtId); convertview.settag(holder); else { holder = (ViewHolder)convertView.getTag(); Picasso.with(getContext()).load(CARROS_URL_FOTO+carro.foto).into(holder.imgFoto); holder.txtmodelo.settext(carro.modelo); // 0: não encontrado if (carro.id > 0) { holder.txtpreco.settext("r$: " + String.valueOf(carro.preco)); holder.txtano.settext("ano: " + String.valueOf(carro.ano)); holder.txtid.settext(" (Id:" + String.valueOf(carro.id) + ")"); return convertview; static class ViewHolder { ImageView imgfoto; TextView txtmodelo; TextView txtpreco; TextView txtano; TextView txtid; CarrosListFragment.java import android.app.fragment; import android.content.intent; import android.os.asynctask; import android.os.bundle; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.widget.adapterview;

4 import android.widget.arrayadapter; import android.widget.listview; import android.widget.progressbar; import android.widget.textview; import android.widget.toast; import java.util.arraylist; import java.util.list; import static android.widget.toast.*; public class CarrosListFragment extends Fragment implements AdapterView.OnItemClickListener { CarrosTask mtask; List<Carro> mcarros; ListView mlistview; TextView mtextmensagem; ProgressBar mprogressbar; ArrayAdapter<Carro> madapter; public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setretaininstance(true); public View oncreateview(layoutinflater inflater, ViewGroup container, Bundle savedinstancestate) { View layout = inflater.inflate(r.layout.fragment_carros_list, null); mtextmensagem = (TextView)layout.findViewById(android.R.id.empty); mprogressbar = (ProgressBar)layout.findViewById(R.id.progressBar); mlistview = (ListView)layout.findViewById(R.id.list); mlistview.setemptyview(mtextmensagem); return layout; public void onactivitycreated(bundle savedinstancestate) { super.onactivitycreated(savedinstancestate); if (mcarros == null) { mcarros = new ArrayList<Carro>(); madapter = new CarrosListAdapter(getActivity(), mcarros); //madapter = new ArrayAdapter<Carro>(getActivity(), android.r.layout.simple_list_item_1, mcarros); mlistview.setadapter(madapter); if (mtask == null) { if (CarroHttp.temConexao(getActivity())) { iniciardownload(); else { mtextmensagem.settext("sem conexão"); else if (mtask.getstatus() == AsyncTask.Status.RUNNING) { exibirprogress(true); // acrescenta chamada ao evento OnItemClick mlistview.setonitemclicklistener(this); private void exibirprogress(boolean exibir) { if (exibir) { mtextmensagem.settext("baixando informações dos carros..."); mtextmensagem.setvisibility(exibir? View.VISIBLE : View.GONE); mprogressbar.setvisibility(exibir? View.VISIBLE : View.GONE); public void iniciardownload() { if (mtask == null mtask.getstatus()!= AsyncTask.Status.RUNNING) { // obtém a variável da Activity String filtro = MainActivity.filtro; mtask = new CarrosTask(); mtask.execute(filtro);

5 public void onitemclick(adapterview<?> adapterview, View view, int i, long l) { Carro carro = (Carro) adapterview.getitematposition(i); // Toast.makeText(getActivity(), "Clicou em " + carro.modelo + " Ano: " + carro.ano, LENGTH_LONG).show(); if (carro.id > 0) { Intent it = new Intent(getActivity(), PropostaActivity.class); it.putextra("modelo", carro.modelo); it.putextra("ano", carro.ano); it.putextra("id", carro.id); it.putextra("preco", carro.preco); it.putextra("foto", carro.foto); startactivity(it); class CarrosTask extends AsyncTask<String, Void, List<Carro>>{ protected void onpreexecute() { super.onpreexecute(); exibirprogress(true); protected List<Carro> doinbackground(string... strings) { return CarroHttp.carregarCarrosJson(strings[0]); protected void onpostexecute(list<carro> carros) { super.onpostexecute(carros); exibirprogress(false); if (carros!= null) { mcarros.clear(); mcarros.addall(carros); madapter.notifydatasetchanged(); else { mtextmensagem.settext("falha ao obter os carros"); FiltroActivity.java import android.content.intent; import android.support.v7.app.appcompatactivity; import android.os.bundle; import android.view.view; import android.widget.button; import android.widget.edittext; import android.widget.textview; import android.widget.toast; public class FiltroActivity extends AppCompatActivity implements View.OnClickListener { private Button btnpesquisar; protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_filtro); btnpesquisar = (Button) findviewbyid(r.id.btnpesquisar); btnpesquisar.setonclicklistener(this); public void onclick(view view) { EditText edtfiltromodelo = (EditText) findviewbyid(r.id.edtfiltromodelo); EditText edtminimo = (EditText) findviewbyid(r.id.edtminimo); EditText edtmaximo = (EditText) findviewbyid(r.id.edtmaximo);

6 String modelo = edtfiltromodelo.gettext().tostring(); String minimo = edtminimo.gettext().tostring(); String maximo = edtmaximo.gettext().tostring(); // verifica se foi preenchido as views de edição if (modelo.matches("") && minimo.matches("") && maximo.matches("")) { Toast.makeText(this, "Preecha, no mínimo, um dos campos", Toast.LENGTH_LONG).show(); edtfiltromodelo.requestfocus(); return; Intent it = new Intent(this, MainActivity.class); it.putextra("modelo", modelo); it.putextra("minimo", minimo); it.putextra("maximo", maximo); startactivity(it); MainActivity.java import android.content.intent; import android.support.v7.app.appcompatactivity; import android.os.bundle; import android.widget.toast; public class MainActivity extends AppCompatActivity { protected static String filtro; protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); Intent it = getintent(); String modelo = it.getstringextra("modelo"); String minimo = it.getstringextra("minimo"); String maximo = it.getstringextra("maximo"); filtro = "modelo="+modelo+"&minimo="+minimo+"&maximo="+maximo; setcontentview(r.layout.activity_main); PropostaActivity.java import android.content.intent; import android.os.asynctask; import android.support.v7.app.appcompatactivity; import android.os.bundle; import android.view.view; import android.widget.button; import android.widget.edittext; import android.widget.imageview; import android.widget.textview; import android.widget.toast; import com.squareup.picasso.picasso; import org.json.jsonexception; import org.json.jsonobject; import java.io.bufferedreader; import java.io.dataoutputstream; import java.io.ioexception; import java.io.inputstreamreader; import java.net.httpurlconnection; import java.net.url; import java.nio.charset.standardcharsets;

7 public class PropostaActivity extends AppCompatActivity implements View.OnClickListener { public static final String CARROS_URL_FOTO = " private ImageView imgpropfoto; private TextView txtpropveiculo; private EditText edt ; private EditText edtproposta; private Button btnenviar; private int idcarro; protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_proposta); txtpropveiculo = (TextView) findviewbyid(r.id.txtpropveiculo); imgpropfoto = (ImageView) findviewbyid(r.id.imgpropfoto); edt = (EditText) findviewbyid(r.id.edt ); edtproposta = (EditText) findviewbyid(r.id.edtproposta); btnenviar = (Button) findviewbyid(r.id.btnenviar); Intent it = getintent(); String modelo = it.getstringextra("modelo"); int ano = it.getintextra("ano", 0); Double preco = it.getdoubleextra("preco", 0); String foto = it.getstringextra("foto"); idcarro = it.getintextra("id", 0); txtpropveiculo.settext(modelo + " " + ano + " - R$: "+preco); Picasso.with(getApplicationContext()).load(CARROS_URL_FOTO+foto).into(imgPropFoto); // joga o foco no edt edt .requestfocus(); btnenviar.setonclicklistener(this); public void onclick(view view) { String = edt .gettext().tostring(); String proposta = edtproposta.gettext().tostring(); String idcarroproposta = String.valueOf(idCarro); enviadados task = new enviadados(); task.execute(" , proposta, idcarroproposta); private class enviadados extends AsyncTask<String, Void, JSONObject> { protected JSONObject doinbackground(string... strings) { String path = strings[0]; String = strings[1]; String proposta = strings[2]; String idcarroproposta = strings[3]; // cria um objeto HttpURLConnection HttpURLConnection conn = null; try { URL url = new URL(path); // abre a conexão conn = (HttpURLConnection) url.openconnection(); // define o método de envio dos dados conn.setrequestmethod("post"); // define os dados a serem enviados String dados = "idcarro="+idcarroproposta+"& ="+ +"&proposta="+proposta; conn.setdooutput(true); // envia os dados try (DataOutputStream out = new DataOutputStream(conn.getOutputStream())) { out.write(dados.getbytes(standardcharsets.utf_8));

8 // define uma StringBuilder para obter o retorno (JSON) StringBuilder resposta = new StringBuilder(); // cria um BufferReader para ler os dados de retorno do WebService try (BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()))) { String linha; while ((linha = in.readline())!= null) { resposta.append(linha); return new JSONObject(resposta.toString()); catch (IOException JSONException e) { e.printstacktrace(); return null; finally { if (conn!= null) { conn.disconnect(); protected void onpostexecute(jsonobject jsonobject) { try { int cod = jsonobject.getint("wsid"); String mensa = jsonobject.getstring("wsmsg"); Toast.makeText(PropostaActivity.this, "Cód: " + cod + " - Mensagem: " + mensa, Toast.LENGTH_LONG).show(); catch (JSONException e) { e.printstacktrace(); ================================= activity_filtro.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=" xmlns:tools=" android:layout_height="match_parent" android:paddingbottom="@dimen/activity_vertical_margin" android:paddingleft="@dimen/activity_horizontal_margin" android:paddingright="@dimen/activity_horizontal_margin" android:paddingtop="@dimen/activity_vertical_margin" android:orientation="vertical" tools:context="br.com.edecio.listacarros.filtroactivity"> android:text="preencha, no mínimo, um dos campos abaixo"/> <EditText android:id="@+id/edtfiltromodelo" android:hint="modelo do Veículo" android:layout_margintop="20dp"/> <EditText android:id="@+id/edtminimo" android:hint="r$ Mínimo" /> <EditText android:id="@+id/edtmaximo" android:hint="r$ Máximo" /> <Button

9 </LinearLayout> android:text="pesquisar" android:layout_margintop="20dp"/> ================================== activity_main.xml <?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android=" android:layout_height="match_parent"> <fragment android:layout_height="match_parent" android:name="br.com.edecio.listacarros.carroslistfragment" </FrameLayout> ================================== activity_proposta.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=" xmlns:tools=" android:layout_height="match_parent" android:orientation="vertical" tools:context="br.com.edecio.listacarros.propostaactivity"> <ImageView android:layout_height="150dp" /> android:textalignment="center" android:textappearance="?android:attr/textappearancemedium"/> android:text="quer fazer uma proposta para este veículo?" android:layout_margintop="12dp"/> <EditText android:textappearance="?android:attr/textappearancemedium" android:hint="seu " android:inputtype="text address" android:layout_margintop="10dp"/> <EditText android:textappearance="?android:attr/textappearancemedium" android:inputtype="textmultiline" android:lines="2" android:gravity="top left" android:scrollbars="vertical" android:hint="proposta (aceitamos troca por veículo de menor valor)"/> <Button android:textappearance="?android:attr/textappearancemedium"

10 </LinearLayout> android:text="enviar Proposta" android:layout_margintop="12dp"/> ==================================== fragment_carros_list.xml <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android=" android:orientation="vertical" android:layout_height="match_parent" android:gravity="center"> <ProgressBar style="?android:attr/progressbarstylelarge" android:layout_width="wrap_content" android:layout_centerinparent="true" android:visibility="gone"/> <ListView android:layout_height="match_parent" /> android:layout_width="wrap_content" android:layout_centerhorizontal="true" </RelativeLayout> ====================================== item_carro_list.xml <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android=" android:layout_gravity="center_vertical" android:padding="6dp"> <ImageView android:layout_width="160dp" android:layout_height="100dp" android:layout_alignparentleft="true" android:layout_alignparentstart="true" android:layout_alignparenttop="true" android:layout_marginright="8dp" android:layout_margintop="8dp"/> android:textappearance="?android:attr/textappearancelarge" /> android:textappearance="?android:attr/textappearancelarge" /> android:layout_width="wrap_content" android:textappearance="?android:attr/textappearancelarge"

11 /> android:layout_width="wrap_content" android:textappearance="?android:attr/textappearancelarge" /> </RelativeLayout> <?php header("content-type: application/json; charset=utf-8"); $servername = "localhost"; $username = "root"; $password = ""; $dbname = "ws_revenda"; // Create connection $conn = new mysqli($servername, $username, $password, $dbname); // Check connection if ($conn->connect_error) { die("connection failed: ". $conn->connect_error); $modelo = htmlspecialchars($_get["modelo"]); $minimo = htmlspecialchars($_get["minimo"]); $maximo = htmlspecialchars($_get["maximo"]); // vai "acumular" os filtros indicados $filtro = ""; if (!empty($modelo)) { $filtro = "modelo like '%$modelo%'"; if (!empty($minimo)) { if (empty($filtro)) { $filtro = "preco >= $minimo"; else { $filtro.= " and preco >= $minimo"; if (!empty($maximo)) { if (empty($filtro)) { $filtro = "preco <= $maximo"; else { $filtro.= " and preco <= $maximo"; $sql = "SELECT * FROM carros where $filtro order by preco"; $result = $conn->query($sql); $carros = array(); if ($result->num_rows > 0) { // output data of each row while ($row = $result->fetch_assoc()) { $linha = array("id" => $row["id"], "modelo" => utf8_encode($row["modelo"]), "ano" => $row["ano"], "preco" => $row["preco"], "foto" => $row["foto"]); $carros[] = $linha; else {

12 $linha = array("id" => 0, "modelo" => "Não há veículos", "ano" => "0", "preco" => "0", "foto" => "fotos/zero.jpg"); $carros[] = $linha; $lista = array("carros" => $carros); $conn->close(); echo json_encode($lista, JSON_PRETTY_PRINT); <?php header("content-type: application/json; charset=utf-8"); $servername = "localhost"; $username = "root"; $password = ""; $dbname = "ws_revenda"; // Create connection $conn = new mysqli($servername, $username, $password, $dbname); // Check connection if ($conn->connect_error) { $dataret = array("wsid"=>0, "wsmsg"=>utf8_encode("erro de Acesso ao Banco de Dados")); echo json_encode($dataret); return; $idcarro = htmlspecialchars($_post["idcarro"]); $ = htmlspecialchars($_post[" "]); $proposta = htmlspecialchars($_post["proposta"]); $sql = "INSERT INTO propostas (carros_id, , proposta) VALUES ($idcarro, '$ ', '$proposta')"; // se a execução do comando retornar true if ($conn->query($sql) === TRUE) { $last_id = $conn->insert_id; $dataret = array("wsid"=>1, "wsmsg"=>utf8_encode("ok! Proposta Cadastrada. Aguarde Contato")); else { $dataret = array("wsid"=>0, "wsmsg"=>utf8_encode("erro no Envio da Proposta ". $conn->error)); echo json_encode($dataret); $conn->close();