Android Open Source - E-merg Service Handler

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License

The source code is released under:

Apache License

Java Source Code

package com.e_merg.types;
//w  ww  .j  a  v a2  s .  co  m
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
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.utils.URLEncodedUtils;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Log;

public class ServiceHandler {

   static String response = null;
   public final static int GET = 1;
   public final static int POST = 2;

   public ServiceHandler() {

   }

   /**
    * Making service call
    * @url - url to make request
    * @method - http request method
    * */
   public String makeServiceCall(String url, int method) {
       return this.makeServiceCall(url, method, null);
   }

   /**
    * Making service call
    * @url - url to make request
    * @method - http request method
    * @params - http request params
    * */
   public String makeServiceCall(String url, int method,List<NameValuePair> params) {
       try {
           // http client
           DefaultHttpClient httpClient = new DefaultHttpClient();
           HttpEntity httpEntity = null;
           HttpResponse httpResponse = null;
           
           // Checking http request method type
           if (method == POST) {
               HttpPost httpPost = new HttpPost(url);
               // adding post params
               if (params != null) {
                   httpPost.setEntity(new UrlEncodedFormEntity(params));
               }

               httpResponse = httpClient.execute(httpPost);

           } else if (method == GET) {
               // appending params to url
               if (params != null) {
                   String paramString = URLEncodedUtils.format(params, "utf-8");
                   url += "?" + paramString;
               }
               HttpGet httpGet = new HttpGet(url);

               httpResponse = httpClient.execute(httpGet);

           }
           httpEntity = httpResponse.getEntity();
           response = EntityUtils.toString(httpEntity);

       } catch (UnsupportedEncodingException e) {
           e.printStackTrace();
       } catch (ClientProtocolException e) {
           e.printStackTrace();
       } catch (IOException e) {
           e.printStackTrace();
       }
       
       return response;

   }
   
   public Bitmap downloadBitmap(String url) {
       // initilize the default HTTP client object
       final DefaultHttpClient client = new DefaultHttpClient();
       Bitmap image = null;

       //forming a HttoGet request 
       final HttpGet getRequest = new HttpGet(url);
       try {

           HttpResponse response = client.execute(getRequest);

           //check 200 OK for success
           final int statusCode = response.getStatusLine().getStatusCode();

           if (statusCode != HttpStatus.SC_OK) {
               Log.w("ImageDownloader", "Error " + statusCode + 
                       " while retrieving bitmap from " + url);
               return null;

           }

           final HttpEntity entity = response.getEntity();
           if (entity != null) {
               InputStream inputStream = null;
               try {
                   // getting contents from the stream 
                   inputStream = entity.getContent();

                   // decoding stream data back into image Bitmap that android understands
                   image = BitmapFactory.decodeStream(inputStream);


               } finally {
                   if (inputStream != null) {
                       inputStream.close();
                   }
                   entity.consumeContent();
               }
           }
       } catch (Exception e) {
           // You Could provide a more explicit error message for IOException
           getRequest.abort();
           Log.e("ImageDownloader", "Something went wrong while" +
                   " retrieving bitmap from " + url + e.toString());
       } 

       return image;
   }
}

Java Source Code List

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