HttpClient的一种简单实现Demo

/**
 * 测试HttpClient2种请求网络方式的Activity
 * get和post
 *
 */
public class HttpClientActivity extends Activity {
    private HttpParams httpParams ;
    private HttpClient httpClient ;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_httpclient);
        EditText et1 = (EditText) this.findViewById(R.id.et1);
        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();
        et1.setText(doPost(url, params));
//        et1.setText(doGet(url2, params2));
        
    }
    /**
     * get 方式发送网络请求
     * @param url    url地址
     * @param params    请求参数
     * @return    返回请求结果statusLine状态行数据
     */
    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 = (Entry) iter.next();
            Object key = entry.getKey();
            Object val = entry.getValue();
            paramStr += paramStr = "&" + key + "=" + val ;
        }
        if(!paramStr.equals("")){
            paramStr.replaceFirst("&", "?");
            url += paramStr;
        }
        HttpGet httpRequest = new HttpGet(url);
        String strResult = "doGetError";
        try {
            /* 发动请求并等待回应 */
            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();
        }
        return strResult;
    }
    /**
     * 
     * @param url
     * @param params
     * @return    服务器返回的数据 httpResponse.getEntity()
     */
    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 */
            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();
        }
        return strResult;
    }
    /**
     * 获取一个HttpClient对象
     * @return 返回一个HttpClient对象
     */
    public HttpClient getHttpClient(){
        //创建HttpParams以用来设置HTTP参数(这一部分不是必须的)
        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, 8196);
        //设置重定向，默认为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();
        return httpClient;
    }
}