Android Open Source - Photochat User Adpater

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Java Source Code

//Custom list adapter
package com.navneet.photochat;
/*w w  w .j a v  a  2 s  .  c o m*/
import java.util.List;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.TextView;

import com.parse.ParseUser;
import com.squareup.picasso.Picasso;

//Array adapter is generic type
public class UserAdpater extends ArrayAdapter<ParseUser> {

  // Declaration of member variables

  protected Context mContext;
  protected List<ParseUser> mUsers;

  // Create constructor
  public UserAdpater(Context context, List<ParseUser> users) {
    // Set the custom layout here
    super(context, R.layout.user_item, users);
    mContext = context;
    mUsers = users;
  }

  // Define the getView method
  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder;
    // Recycling list items to increase efficiency
    // Inflate the layout file to view
    if (convertView == null) {
      convertView = LayoutInflater.from(mContext).inflate(
          R.layout.user_item, null);
      holder = new ViewHolder();

      holder.userImage = (ImageView) convertView
          .findViewById(R.id.emptyUserIcon);

      holder.textLabel = (TextView) convertView.findViewById(R.id.userId);
      holder.checkImage = (ImageView) convertView
          .findViewById(R.id.selectedUserIcon);
      convertView.setTag(holder);

    } else {
      // convertView already created
      holder = (ViewHolder) convertView.getTag();

    }
    // Now set the icons
    ParseUser user = mUsers.get(position);
    // Get the email of the user
    String email = user.getEmail().toLowerCase();
    if (email.equals("")) {
      holder.userImage.setImageResource(R.drawable.friendicon);
    } else {
      // Creating the MD5 hash for the email
      String hash = MD5Util.md5Hex(email);
      // Getting the gravatar URL
      String gravatarURL = "http://www.gravatar.com/avatar/" + hash
          + "?s=180&d=404";
      // Use the picasso lib to show the image
      Picasso.with(mContext).load(gravatarURL)
          .placeholder(R.drawable.friendicon).into(holder.userImage);

    }

    holder.textLabel.setText(user.getUsername());

    // Define a gridview parent and use it to check whether an element is
    // checked or not
    GridView gridView = (GridView) parent;
    if (gridView.isItemChecked(position)) {
      holder.checkImage.setVisibility(View.VISIBLE);
    } else {
      holder.checkImage.setVisibility(View.INVISIBLE);
    }
    return convertView;
  }

  private static class ViewHolder {
    ImageView userImage;
    TextView textLabel;
    ImageView checkImage;
  }

  public void refill(List<ParseUser> users) {
    // 1.Clear the list
    mUsers.clear();
    // 2.Add usernames
    mUsers.addAll(users);
    // Notify the user about the change
    notifyDataSetChanged();

  }
}

Java Source Code List