Gallery Activity

GalleryActivity.java

package com.omerhakanbilici.fellowshipofthering;

import java.io.InputStream;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

import android.app.Activity;
import android.app.ProgressDialog;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.widget.ImageView;

public class GalleryActivity extends Activity {

  ImageView iv;
	Bitmap image ;
	ProgressDialog pd;
  
	@Override
	public void onCreate(Bundle savedInstanceState) {
	    super.onCreate(savedInstanceState);
	    setContentView(R.layout.activity_main);
	    iv = (ImageView) findViewById(R.id.imageView1);
	    pd = new ProgressDialog(this);
	    pd.setMessage("Loading..");
	    new GalleryTask().execute();    
	}
	class GalleryTask extends AsyncTask<Void,Void,Void>
	{

	    @Override
	    protected void onPreExecute() {
	        // TODO Auto-generated method stub
	        super.onPreExecute();
	        pd.show();
	    }

	    @Override
	    protected Void doInBackground(Void... params) {
	        // TODO Auto-generated method stub
	        try
	        {
	        //URL url = new URL( "http://a3.twimg.com/profile_images/670625317/aam-logo-v3-twitter.png");

	        image = downloadBitmap("http://mihrisi.me/img/full-width/29.jpg");
	        }
	        catch(Exception e)
	        {
	            e.printStackTrace();
	        }
	        return null;
	    }

	    @Override
	    protected void onPostExecute(Void result) {
	        // TODO Auto-generated method stub
	        super.onPostExecute(result);
	        pd.dismiss();
	        if(image!=null)
	        {
	            iv.setImageBitmap(image);
	        }

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

	     //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;
	 }

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.gallery, menu);
		return true;
	}

}