src/org/sflphone/adapters/ContactsAdapter.java

package org.sflphone.adapters;

import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import org.sflphone.R;
import org.sflphone.fragments.ContactListFragment;
import org.sflphone.model.CallContact;
import org.sflphone.views.stickylistheaders.StickyListHeadersAdapter;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.SectionIndexer;
import android.widget.TextView;
import android.widget.Toast;

public class ContactsAdapter extends BaseAdapter implements StickyListHeadersAdapter, SectionIndexer {

    private ExecutorService infos_fetcher = Executors.newCachedThreadPool();
    Context mContext;

    private ArrayList<CallContact> mContacts;
    private int[] mSectionIndices;
    private Character[] mSectionLetters;
    WeakReference<ContactListFragment> parent;
    private LayoutInflater mInflater;

    // private static final String TAG = ContactsAdapter.class.getSimpleName();

    public ContactsAdapter(ContactListFragment contactListFragment) {
        super();
        mContext = contactListFragment.getActivity();
        mInflater = LayoutInflater.from(mContext);
        parent = new WeakReference<ContactListFragment>(contactListFragment);
        mContacts = new ArrayList<CallContact>();
        mSectionIndices = getSectionIndices();
        mSectionLetters = getSectionLetters();
    }

    public static final int TYPE_HEADER = 0;
    public static final int TYPE_CONTACT = 1;

    private int[] getSectionIndices() {
        ArrayList<Integer> sectionIndices = new ArrayList<Integer>();
        if (mContacts.isEmpty())
            return new int[0];
        char lastFirstChar = mContacts.get(0).getmDisplayName().charAt(0);
        sectionIndices.add(0);
        for (int i = 1; i < mContacts.size(); i++) {
            if (mContacts.get(i).getmDisplayName().charAt(0) != lastFirstChar) {
                lastFirstChar = mContacts.get(i).getmDisplayName().charAt(0);
                sectionIndices.add(i);
            }
        }
        int[] sections = new int[sectionIndices.size()];
        for (int i = 0; i < sectionIndices.size(); i++) {
            sections[i] = sectionIndices.get(i);
        }
        return sections;
    }

    private Character[] getSectionLetters() {
        Character[] letters = new Character[mSectionIndices.length];
        for (int i = 0; i < mSectionIndices.length; i++) {
            letters[i] = mContacts.get(mSectionIndices[i]).getmDisplayName().charAt(0);
        }
        return letters;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup root) {
        ContactView entryView;

        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.item_contact, null);

            entryView = new ContactView();
            entryView.quick_starred = (ImageButton) convertView.findViewById(R.id.quick_starred);
            entryView.quick_edit = (ImageButton) convertView.findViewById(R.id.quick_edit);
            entryView.quick_discard = (ImageButton) convertView.findViewById(R.id.quick_discard);
            entryView.quick_call = (ImageButton) convertView.findViewById(R.id.quick_call);
            entryView.quick_msg = (ImageButton) convertView.findViewById(R.id.quick_message);
            entryView.photo = (ImageView) convertView.findViewById(R.id.photo);
            entryView.display_name = (TextView) convertView.findViewById(R.id.display_name);
            convertView.setTag(entryView);
        } else {
            entryView = (ContactView) convertView.getTag();
        }

        final CallContact item = mContacts.get(position);

        entryView.display_name.setText(item.getmDisplayName());

        if (item.hasPhoto()) {
            entryView.photo.setImageBitmap(item.getPhoto());
        } else {
            infos_fetcher.execute(new ContactPictureTask(mContext, entryView.photo, item));
        }

        entryView.quick_call.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                parent.get().mCallbacks.onCallContact(item);

            }
        });

        entryView.quick_msg.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                parent.get().mCallbacks.onTextContact(item);
            }
        });

        entryView.quick_starred.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                Toast.makeText(mContext, "Coming soon", Toast.LENGTH_SHORT).show();
            }
        });

        entryView.quick_edit.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                parent.get().mCallbacks.onEditContact(item);

            }
        });

        entryView.quick_discard.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                Toast.makeText(mContext, "Coming soon", Toast.LENGTH_SHORT).show();

            }
        });

        entryView.quick_edit.setClickable(false);
        entryView.quick_discard.setClickable(false);
        entryView.quick_starred.setClickable(false);

        return convertView;
    }

    /*********************
     * ViewHolder Pattern
     *********************/
    public class ContactView {
        ImageButton quick_starred, quick_edit, quick_discard, quick_call, quick_msg;
        ImageView photo;
        TextView display_name;
    }

    @Override
    public int getCount() {
        return mContacts.size();
    }

    @Override
    public int getViewTypeCount() {
        return 2;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getHeaderView(int position, View convertView, ViewGroup parent) {
        HeaderViewHolder holder;

        if (convertView == null) {
            holder = new HeaderViewHolder();
            convertView = mInflater.inflate(R.layout.header, parent, false);
            holder.text = (TextView) convertView.findViewById(R.id.header_letter);
            convertView.setTag(holder);
        } else {
            holder = (HeaderViewHolder) convertView.getTag();
        }

        // set header text as first char in name
        char headerChar = mContacts.get(position).getmDisplayName().subSequence(0, 1).charAt(0);

        holder.text.setText("" + headerChar);

        return convertView;

    }

    class HeaderViewHolder {
        TextView text;
    }

    @Override
    public long getHeaderId(int position) {
        // return the first character of the name as ID because this is what
        // headers are based upon
        return mContacts.get(position).getmDisplayName().subSequence(0, 1).charAt(0);
    }

    @Override
    public int getPositionForSection(int section) {
        if (section >= mSectionIndices.length) {
            section = mSectionIndices.length - 1;
        } else if (section < 0) {
            section = 0;
        }
        return mSectionIndices[section];
    }

    @Override
    public int getSectionForPosition(int position) {
        for (int i = 0; i < mSectionIndices.length; i++) {
            if (position < mSectionIndices[i]) {
                return i - 1;
            }
        }
        return mSectionIndices.length - 1;
    }

    @Override
    public Object[] getSections() {
        return mSectionLetters;
    }

    @Override
    public CallContact getItem(int position) {
        return mContacts.get(position);
    }

    public void clear() {
        mContacts = new ArrayList<CallContact>();
        mSectionIndices = new int[0];
        mSectionLetters = new Character[0];
        notifyDataSetChanged();
    }

    public void restore() {
        mContacts = new ArrayList<CallContact>();
        mSectionIndices = getSectionIndices();
        mSectionLetters = getSectionLetters();
        notifyDataSetChanged();
    }

    public void addAll(ArrayList<CallContact> tmp) {
        mContacts.addAll(tmp);
        mSectionIndices = getSectionIndices();
        mSectionLetters = getSectionLetters();
        notifyDataSetChanged();
    }

}