ListView with icon loaded from internet

With the last exercise "Load ImageView with bitmap from internet", we can now modify the the former exercise "Using convertView in getView() to make ListView efficient" to load the icon from internet, instead of loading from our resources.



please note that in order to permit the App to access to internet, we have to grand it permission of "android.permission.INTERNET"; refer to the last exercise "Load ImageView with bitmap from internet"

Keep usng the /res/layout/row.xml as previous exercise, "ListView, with icon".

AndroidList.java

package com.exercise.AndroidList;

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

import android.app.ListActivity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class AndroidList extends ListActivity {

String image_URL=
 "https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhksTzch5dDj7Re1S7swjNTOTGXJt5Z8hdF7qRSSs3xA98mE4h_-Qac-JjoEI8K4KWGXi76p0f8zuoac9xHCSSzrv5BMmfUyg3EBtdcrIMf_yuc2bITFMb92LpdUi6n1AILG5pmkGI26Ql9/s1600-r/android.png";

public class MyCustomAdapter extends ArrayAdapter<String> {

 Bitmap bm;

 public MyCustomAdapter(Context context, int textViewResourceId,
   String[] objects) {
  super(context, textViewResourceId, objects);
  // TODO Auto-generated constructor stub
 
  BitmapFactory.Options bmOptions;
     bmOptions = new BitmapFactory.Options();
     bmOptions.inSampleSize = 1;
     bm = LoadImage(image_URL, bmOptions);

 }

 @Override
 public View getView(int position, View convertView, ViewGroup parent) {
  // TODO Auto-generated method stub
  //return super.getView(position, convertView, parent);
 
  View row = convertView;
 
  if(row==null){
   LayoutInflater inflater=getLayoutInflater();
   row=inflater.inflate(R.layout.row, parent, false);
  }
 
  TextView label=(TextView)row.findViewById(R.id.weekofday);
  label.setText(month[position]);
  ImageView icon=(ImageView)row.findViewById(R.id.icon);
 
  icon.setImageBitmap(bm);
 
  return row;
 }
}

String[] month = {
     "January", "February", "March", "April",
     "May", "June", "July", "August",
     "September", "October", "November", "December"
   };

  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      //setContentView(R.layout.main);
      /*setListAdapter(new ArrayAdapter<String>(this,
        R.layout.row, R.id.weekofday, DayOfWeek));*/
      setListAdapter(new MyCustomAdapter(AndroidList.this, R.layout.row, month));
  }

@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
 // TODO Auto-generated method stub
 //super.onListItemClick(l, v, position, id);
 String selection = l.getItemAtPosition(position).toString();
 Toast.makeText(this, selection, Toast.LENGTH_LONG).show();
}

private Bitmap LoadImage(String URL, BitmapFactory.Options options)
  {      
   Bitmap bitmap = null;
   InputStream in = null;      
      try {
          in = OpenHttpConnection(URL);
          bitmap = BitmapFactory.decodeStream(in, null, options);
          in.close();
      } catch (IOException e1) {
      }
      return bitmap;              
  }

private InputStream OpenHttpConnection(String strURL) throws IOException{
 InputStream inputStream = null;
 URL url = new URL(strURL);
 URLConnection conn = url.openConnection();

 try{
  HttpURLConnection httpConn = (HttpURLConnection)conn;
  httpConn.setRequestMethod("GET");
  httpConn.connect();

  if (httpConn.getResponseCode() == HttpURLConnection.HTTP_OK) {
   inputStream = httpConn.getInputStream();
  }
 }
 catch (Exception ex)
 {
 }
 return inputStream;
}

}

next: Load ListView in background AsyncTask