【工具类】NetWorkHelper

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Log;
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.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;


public class NetWorkHelper {
    
    //  使用POST方式时，传递参数必须使用NameValuePair数组
    //  通过setEntity方法来发送HTTP请求
    //  通过DefaultHttpClient 的 execute方法来获取HttpResponse
    //  通过getEntity()从Response中获取内容
    public static String getPostFromWeb(String path,List<NameValuePair> nameValuePairs) {
        try{
              String datatext = null;
              HttpClient httpclient = new DefaultHttpClient();
            HttpPost httppost = new HttpPost(path);
            httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs,HTTP.UTF_8));
            HttpResponse response = httpclient.execute(httppost);
            int statusCode = response.getStatusLine().getStatusCode();
            datatext = EntityUtils.toString(response.getEntity());
            Log.i("httpPostData", "data："+ datatext);
            Log.i("httpPostData", "得到状态码："+ statusCode);
            return datatext;
        }catch(Exception e){
            Log.i("httpPostData", "Exception："+ e.getMessage());
                e.printStackTrace();
        }
         return null;
    }
    
    /**
     * 通过地址得到网络图片
     * @param url
     * @return
     */
    public static Bitmap getHttpBitmap(String url) {
        URL fileUrl = null;
        Bitmap bitmap = null;
        try {
            fileUrl = new URL(url);
            HttpURLConnection urlconn = (HttpURLConnection) fileUrl.openConnection();
            urlconn.setConnectTimeout(0);
            urlconn.setDoInput(true);
            urlconn.connect();
            InputStream input = urlconn.getInputStream();
            bitmap = BitmapFactory.decodeStream(input);
            input.close();
        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return bitmap;
    }
}