Retrieve an image from internet...

           In this application,by pressing a button we can retrieve a image from internet by giving a link to the application code.For this we need a xml layout containing a button and a imageview widget.When the button is pressed,the image data is retrieved and showed in the imageview widget.Here is the xml code of the layout:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" android:orientation="vertical">
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
<Button android:id="@+id/Button01" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Connect"></Button>

<ImageView android:id="@+id/ImageView01" android:layout_width="wrap_content" android:layout_height="wrap_content"></ImageView>
</LinearLayout>

      Now we will use three java class for this.In the first one named ImageReadMain ,we initialize the button and the imageview and define the onClick method of the button.In the second java class connection1 the code for connection is written in setNetwork() method.In the last one named Data class,we simply write a static bitmap variable,that we will use in previous two classes.

Now look at the ImageReadMain class...

package Image.Read.a;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;



public class ImageReadMain extends Activity 
{
   //Reference www.androidcookers.co.cc
    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        Button btn=(Button)findViewById(R.id.Button01);
        final ImageView imgVi=(ImageView)findViewById(R.id.ImageView01);
        
        btn.setOnClickListener(new OnClickListener()
        {
                public void onClick(View v) 
                 {    
                    Connecetion1 con=new Connecetion1();
                    con.setNetwork();
                    imgVi.setImageBitmap(Data.StoreImg);
                                      
                 }
         });
                
    }
}

Here the retrieved image stored in Data.StoreImg is shown in the imageview.Now the connection1 class that is used in ImageReadMain class.

package Image.Read.a;

import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;

import android.graphics.BitmapFactory;

public class Connecetion1 
{
     public void setNetwork()
     {
        try
        {

            URL url = new URL("https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjgifeYpeiAXU_d7MgXj8jKko-9TTYALn_rKxd2OmVLV3TjO7vBxvqYrKycgXb4RDDB7h_jqTrwQ4Ha1GHquPMQoG5BQzXhVEQ4eL_mqvkhKH6ZJpdMoS_60Z4UIddqXHJ8hk6JafAX644/s400/sachin_tendulkar_double_century.jpg");

            URLConnection connection=url.openConnection();
           
            HttpURLConnection HCon=(HttpURLConnection)connection;
            
            int ResCode=HCon.getResponseCode();

            System.out.println("Responce Code is = "+ResCode);
            
            
            if(ResCode==HttpURLConnection.HTTP_OK)
            {
                
            InputStream ins=((URLConnection)HCon).getInputStream();    
                
                  Data.StoreImg=BitmapFactory.decodeStream(ins);
            
            
            }
  
        }
        catch (MalformedURLException e) 
            {
            
            e.printStackTrace();
        } catch (IOException e) 
            {
        
              e.printStackTrace();
             }
        
     }

}

Here the image data is retrieved by ((URLConnection)HCon).getInputStream().This is stored in Data.StoreImg after converting to bitmap image via BitmapFactory.decodeStream(ins).

Now the code of Data class:

package Image.Read.a;

import android.graphics.Bitmap;

public class Data
{
    public static Bitmap StoreImg;

}

Now the important thing is ,we have to add the user permission internet to the Android manifest by opening the permission tab before running the application.
 
After running the image can be show in imageview widget.