Android HttpClient实例详解--用代码说话

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package alex.reader.ebook.bam;  
import java.io.IOException;  
import java.util.ArrayList;  
import java.util.HashMap;  
import java.util.Iterator;  
import java.util.List;  
import java.util.Map;  
import org.apache.http.HttpResponse;  
import org.apache.http.NameValuePair;  
import org.apache.http.client.ClientProtocolException;  
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.client.params.HttpClientParams;  
import org.apache.http.impl.client.DefaultHttpClient;  
import org.apache.http.message.BasicNameValuePair;  
import org.apache.http.params.BasicHttpParams;  
import org.apache.http.params.HttpConnectionParams;  
import org.apache.http.params.HttpParams;  
import org.apache.http.params.HttpProtocolParams;  
import org.apache.http.protocol.HTTP;  
import org.apache.http.util.EntityUtils;  
import <a href="http://lib.csdn.net/base/15" class='replace_word' title="undefined" target='_blank' style='color:#df3434; font-weight:bold;'>Android</a>.app.Activity;  
import android.os.Bundle;  
import android.util.Log;  
import android.widget.EditText;  
public class SimpleClient extends Activity {  
    private HttpParams httpParams;  
    private HttpClient httpClient;  
    @Override  
    public void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.simple_client);  
        EditText editText = (EditText) this.findViewById(R.id.EditText01);  
        List<NameValuePair> params = new ArrayList<NameValuePair>();  
        params.add(new BasicNameValuePair("email", "firewings.r@gmail.com"));  
        params.add(new BasicNameValuePair("password", "954619"));  
        params.add(new BasicNameValuePair("remember", "1"));  
        params.add(new BasicNameValuePair("from", "kx"));  
        params.add(new BasicNameValuePair("login", "登 录"));  
        params.add(new BasicNameValuePair("refcode", ""));  
        params.add(new BasicNameValuePair("refuid", "0"));  
        Map params2 = new HashMap();  
        params2.put("hl", "zh-CN");  
        params2.put("source", "hp");  
        params2.put("q", "haha");  
        params2.put("aq", "f");  
        params2.put("aqi", "g10");  
        params2.put("aql", "");  
        params2.put("oq", "");  
        String url2 = "http://www.google.cn/search";  
        String url = "http://wap.kaixin001.com/home/";  
        getHttpClient();  
        editText.setText(doPost(url, params));  
        // editText.setText(doGet(url2, params2));  
    }  
    public String doGet(String url, Map params) {  
        /* 建立HTTPGet对象 */  
        String paramStr = "";  
        Iterator iter = params.entrySet().iterator();  
        while (iter.hasNext()) {  
            Map.Entry entry = (Map.Entry) iter.next();  
            Object key = entry.getKey();  
            Object val = entry.getValue();  
            paramStr += paramStr = "&" + key + "=" + val;  
        }  
        if (!paramStr.equals("")) {  
            paramStr = paramStr.replaceFirst("&", "?");  
            url += paramStr;  
        }  
        HttpGet httpRequest = new HttpGet(url);  
        String strResult = "doGetError";  
        try {  
            /* 发送请求并等待响应 */  
            HttpResponse httpResponse = httpClient.execute(httpRequest);  
            /* 若状态码为200 ok */  
            if (httpResponse.getStatusLine().getStatusCode() == 200) {  
                /* 读返回数据 */  
                strResult = EntityUtils.toString(httpResponse.getEntity());  
            } else {  
                strResult = "Error Response: "  
                        + httpResponse.getStatusLine().toString();  
            }  
        } catch (ClientProtocolException e) {  
            strResult = e.getMessage().toString();  
            e.printStackTrace();  
        } catch (IOException e) {  
            strResult = e.getMessage().toString();  
            e.printStackTrace();  
        } catch (Exception e) {  
            strResult = e.getMessage().toString();  
            e.printStackTrace();  
        }  
        Log.v("strResult", strResult);  
        return strResult;  
    }  
    public String doPost(String url, List<NameValuePair> params) {  
        /* 建立HTTPPost对象 */  
        HttpPost httpRequest = new HttpPost(url);  
        String strResult = "doPostError";  
        try {  
            /* 添加请求参数到请求对象 */  
            httpRequest.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));  
            /* 发送请求并等待响应 */  
            HttpResponse httpResponse = httpClient.execute(httpRequest);  
            /* 若状态码为200 ok */  
            if (httpResponse.getStatusLine().getStatusCode() == 200) {  
                /* 读返回数据 */  
                strResult = EntityUtils.toString(httpResponse.getEntity());  
            } else {  
                strResult = "Error Response: "  
                        + httpResponse.getStatusLine().toString();  
            }  
        } catch (ClientProtocolException e) {  
            strResult = e.getMessage().toString();  
            e.printStackTrace();  
        } catch (IOException e) {  
            strResult = e.getMessage().toString();  
            e.printStackTrace();  
        } catch (Exception e) {  
            strResult = e.getMessage().toString();  
            e.printStackTrace();  
        }  
        Log.v("strResult", strResult);  
        return strResult;  
    }  
    public HttpClient getHttpClient() {  
        // 创建 HttpParams 以用来设置 HTTP 参数（这一部分不是必需的）  
        this.httpParams = new BasicHttpParams();  
        // 设置连接超时和 Socket 超时，以及 Socket 缓存大小  
        HttpConnectionParams.setConnectionTimeout(httpParams, 20 * 1000);  
        HttpConnectionParams.setSoTimeout(httpParams, 20 * 1000);  
        HttpConnectionParams.setSocketBufferSize(httpParams, 8192);  
        // 设置重定向，缺省为 true  
        HttpClientParams.setRedirecting(httpParams, true);  
        // 设置 user agent  
        String userAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.2) Gecko/20100115 Firefox/3.6";  
        HttpProtocolParams.setUserAgent(httpParams, userAgent);  
        // 创建一个 HttpClient 实例  
        // 注意 HttpClient httpClient = new HttpClient(); 是Commons HttpClient  
        // 中的用法，在 Android 1.5 中我们需要使用 Apache 的缺省实现 DefaultHttpClient  
        httpClient = new DefaultHttpClient(httpParams);  
        return httpClient;  
    }  
}