Web
Faça uma página em Asp.net C# com este código
using System;
namespace GetPost
{
public partial class pagina : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Page.EnableViewState = false;
if (Request.QueryString["codigo"] != null)
{
string[] lista = new string[5] { "Jessica", "Angelina", "Natalie", "Charlize", "Scarlet" };
int codigo = int.Parse(Request.QueryString["codigo"].ToString());
string retorno = (codigo < 1 || codigo > 5) ? "ERR: Código inválido" : lista[codigo - 1];
Response.Clear();
Response.Expires = -1; // Requerido para manter a pagina no cache do navegador
Response.ContentType = "text/plain";
Response.Write(retorno);
Response.End();
}
}
}
}
Para testar, basta publicá-la (no meu caso em http://help.market.com.br/pagina.aspx) e testar com um parâmetro:
http://help.market.com.br/pagina.aspx?codigo=5
retorno:
App Android - Completo - conexão normal e via JAKARTA
Todos os fontes abaixo
Tela
Http.java
package com.webservice;
import java.util.Map;
public abstract class Http {
//utiliza UrlConnection
public static final int NORMAL = 1;
//Utiliza o Jakarta HttpClient
public static final int JAKARTA = 2;
public static Http getInstance(int tipo){
switch (tipo) {
case NORMAL:
//UrlConnection
return new HttpNormalImpl();
case JAKARTA:
//Jakarta Commons HttpClient
return new HttpClientImpl();
default:
return new HttpNormalImpl();
}
}
//retorna o texto do arquivo
public abstract String downloadArquivo(String url);
//retorna os bytes da imagem
public abstract byte[] downloadImagem(String url);
//faz post enviando os parâmetros
public abstract String doPost(String url, Map<String, Integer> map);
}
HttpClientImpl.Java
package com.webservice;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import android.util.Log;
public class HttpClientImpl extends Http {
private final String CATEGORIA = "livro";
@Override
public final String downloadArquivo(String url) {
try {
HttpClient httpclient = new DefaultHttpClient();
HttpGet httpget = new HttpGet(url);
Log.i(CATEGORIA, "request " + httpget.getURI());
HttpResponse response = httpclient.execute(httpget);
Log.i(CATEGORIA, "----------------------------------------");
Log.i(CATEGORIA, String.valueOf(response.getStatusLine()));
Log.i(CATEGORIA, "----------------------------------------");
HttpEntity entity = response.getEntity();
if (entity != null) {
Log.i(CATEGORIA, "Lendo resposta");
InputStream in = entity.getContent();
String texto = readString(in);
return texto;
}
} catch (Exception e) {
Log.e(CATEGORIA, e.getMessage(), e);
}
return null;
}
@Override
public final byte[] downloadImagem(String url) {
try {
HttpClient httpclient = new DefaultHttpClient();
HttpGet httpget = new HttpGet(url);
Log.i(CATEGORIA, "request " + httpget.getURI());
HttpResponse response = httpclient.execute(httpget);
Log.i(CATEGORIA, "----------------------------------------");
Log.i(CATEGORIA, String.valueOf(response.getStatusLine()));
Log.i(CATEGORIA, "----------------------------------------");
HttpEntity entity = response.getEntity();
if (entity != null) {
Log.i(CATEGORIA, "Lendo resposta...");
InputStream in = entity.getContent();
byte[] bytes = readBytes(in);
Log.i(CATEGORIA, "Resposta: " + bytes);
return bytes;
}
} catch (Exception e) {
Log.e(CATEGORIA, e.getMessage(), e);
}
return null;
}
@Override
public final String doPost(String url, Map<String, Integer> map) {
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
Log.i(CATEGORIA, "HttpClient.post " + httpPost.getURI());
// cria os parâmetros
List<NameValuePair> params = getParams(map);
// seta os parametros para enviar
httpPost.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
Log.i(CATEGORIA, "HttpClient.params " + params);
HttpResponse response = httpclient.execute(httpPost);
Log.i(CATEGORIA, "----------------------------------------");
Log.i(CATEGORIA, String.valueOf(response.getStatusLine()));
Log.i(CATEGORIA, "----------------------------------------");
HttpEntity entity = response.getEntity();
if (entity != null) {
InputStream in = entity.getContent();
String texto = readString(in);
Log.i(CATEGORIA, "Resposta: " + texto);
return texto;
}
} catch (Exception e) {
Log.e(CATEGORIA, e.getMessage(), e);
}
return null;
}
private byte[] readBytes(InputStream in) throws IOException {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
try {
byte[] buf = new byte[1024];
int len;
while ((len = in.read(buf)) > 0) {
bos.write(buf, 0, len);
}
byte[] bytes = bos.toByteArray();
return bytes;
} finally {
bos.close();
}
}
private String readString(InputStream in) throws IOException {
byte[] bytes = readBytes(in);
String texto = new String(bytes);
return texto;
}
private List<NameValuePair> getParams(Map<String, Integer> map) throws IOException {
if (map == null || map.size() == 0) {
return null;
}
List<NameValuePair> params = new ArrayList<NameValuePair>();
Iterator<String> e = (Iterator<String>) map.keySet().iterator();
while (e.hasNext()) {
String name = (String) e.next();
Object value = map.get(name);
params.add(new BasicNameValuePair(name, String.valueOf(value)));
}
return params;
}
}
HttpNormalImpl.java
package com.webservice;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Iterator;
import java.util.Map;
import android.util.Log;
public class HttpNormalImpl extends Http {
private final String CATEGORIA = "livro";
@Override
public final String downloadArquivo(String url) {
Log.i(CATEGORIA, "Http.downloadArquivo: " + url);
try {
// Cria a URL
URL u = new URL(url);
HttpURLConnection conn = (HttpURLConnection) u.openConnection();
// Configura a requisição para get
// connection.setRequestProperty("Request-Method","GET");
conn.setRequestMethod("GET");
conn.setDoInput(true);
conn.setDoOutput(false);
conn.connect();
InputStream in = conn.getInputStream();
// String arquivo = readBufferedString(sb, in);
String arquivo = readString(in);
conn.disconnect();
return arquivo;
} catch (MalformedURLException e) {
Log.e(CATEGORIA, e.getMessage(), e);
} catch (IOException e) {
Log.e(CATEGORIA, e.getMessage(), e);
}
return null;
}
@Override
public final byte[] downloadImagem(String url) {
Log.i(CATEGORIA, "Http.downloadImagem: " + url);
try {
// Cria a URL
URL u = new URL(url);
HttpURLConnection connection = (HttpURLConnection) u.openConnection();
// Configura a requisição para get
connection.setRequestProperty("Request-Method", "GET");
connection.setDoInput(true);
connection.setDoOutput(false);
connection.connect();
InputStream in = connection.getInputStream();
// String arquivo = readBufferedString(sb, in);
byte[] bytes = readBytes(in);
Log.i(CATEGORIA, "imagem retornada com: " + bytes.length + " bytes");
connection.disconnect();
return bytes;
} catch (MalformedURLException e) {
Log.e(CATEGORIA, e.getMessage(), e);
} catch (IOException e) {
Log.e(CATEGORIA, e.getMessage(), e);
}
return null;
}
@Override
public String doPost(String url, Map<String, Integer> params) {
try {
String queryString = getQueryString(params);
String texto = doPost(url, queryString);
return texto;
} catch (IOException e) {
Log.e(CATEGORIA, e.getMessage(), e);
}
return url;
}
// Faz um requsição POST na URL informada e retorna o texto
// Os parâmetros são enviados ao servidor
private String doPost(String url, String params) throws IOException {
Log.i(CATEGORIA, "Http.doPost: " + url + "?" + params);
URL u = new URL(url + "?" + params);
HttpURLConnection conn = (HttpURLConnection) u.openConnection();
conn.setRequestMethod("POST");
conn.setDoOutput(true);
conn.setDoInput(true);
conn.connect();
OutputStream out = conn.getOutputStream();
byte[] bytes = params.getBytes("UTF8");
out.write(bytes);
out.flush();
out.close();
InputStream in = conn.getInputStream();
// le o texto
String texto = readString(in);
conn.disconnect();
return texto;
}
// Transforma o HashMap em uma query string fazer o POST
private String getQueryString(Map<String, Integer> params) throws IOException {
if (params == null || params.size() == 0) {
return null;
}
String urlParams = null;
Iterator<String> e = (Iterator<String>) params.keySet().iterator();
while (e.hasNext()) {
String chave = (String) e.next();
Object objValor = params.get(chave);
String valor = objValor.toString();
urlParams = urlParams == null ? "" : urlParams + "&";
urlParams += chave + "=" + valor;
}
return urlParams;
}
// Faz a leitura do array de bytes da InputStream retornada
private byte[] readBytes(InputStream in) throws IOException {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
try {
byte[] buffer = new byte[1024];
int len;
while ((len = in.read(buffer)) > 0) {
bos.write(buffer, 0, len);
}
byte[] bytes = bos.toByteArray();
return bytes;
} finally {
bos.close();
in.close();
}
}
// Faz a leitura do texto da InputStream retornada
private String readString(InputStream in) throws IOException {
byte[] bytes = readBytes(in);
String texto = new String(bytes);
Log.i(CATEGORIA, "Http.readString: " + texto);
return texto;
}
}
TesteWebServiceActivity.java
package com.webservice;
import java.util.HashMap;
import java.util.Map;
import android.app.Activity;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class TesteWebServiceActivity extends Activity implements OnClickListener, Runnable {
// componentes visuais
TextView tvResposta;
Button btConsultar;
EditText edCodigo;
// handler usado para atualizar a view
private Handler handler = new Handler();
private ProgressDialog dialog;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
AssociarComponentes();
}
private void AssociarComponentes() {
tvResposta = (TextView) findViewById(R.id.tvResposta);
edCodigo = (EditText) findViewById(R.id.edCodigo);
btConsultar = (Button) findViewById(R.id.btConsultar);
btConsultar.setOnClickListener(this);
}
public void onClick(View v) {
dialog = ProgressDialog.show(this, "Exemplo", "Buscando texto, aguarde...", false, true);
// faz o download numa thread
new Thread(this).start();
}
public void run() {
try {
int codigo = Integer.parseInt(edCodigo.getText().toString());
final String url = "http://www.help.market.com.br/pagina.aspx";
Map<String, Integer> params = new HashMap<String, Integer>();
params.put("codigo", codigo);
final String resultado = Http.getInstance(Http.NORMAL).doPost(url, params);
try {
// precisa do handler para atualizar a view de outra thread
handler.post(new Runnable() {
public void run() {
tvResposta.setText(resultado);
}
});
} catch (Exception e) {
e.printStackTrace();
}
} catch (Throwable e) {
Log.e("Erro", e.getMessage(), e);
} finally {
dialog.dismiss();
}
}
}
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Digite o código" />
<EditText
android:id="@+id/edCodigo"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="number" >
<requestFocus />
</EditText>
<Button
android:id="@+id/btConsultar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Consultar" />
<TextView
android:id="@+id/tvResposta"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Resposta" />
</LinearLayout>
Manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.webservice"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".TesteWebServiceActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Projeto
