com.digiplex.extra.grantpermissiondemo.ContactsFragment.java Source code

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Here is the source code for com.digiplex.extra.grantpermissiondemo.ContactsFragment.java

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/*
* Copyright (C) 2011 by Ngewi Fet <ngewif@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/

package com.digiplex.extra.grantpermissiondemo;

import android.app.Activity;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.provider.ContactsContract.Contacts;
import android.support.v4.app.ListFragment;
import android.support.v4.app.LoaderManager.LoaderCallbacks;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.support.v4.widget.SimpleCursorAdapter;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AlphabetIndexer;
import android.widget.ListView;
import android.widget.SectionIndexer;

public class ContactsFragment extends ListFragment implements LoaderCallbacks<Cursor> {

    private static final String[] CONTACTS_SUMMARY_PROJECTION = new String[] { Contacts._ID, Contacts.DISPLAY_NAME,
            Contacts.HAS_PHONE_NUMBER, Contacts.LOOKUP_KEY };
    private OnContactSelectedListener mContactsListener;
    private SimpleCursorAdapter mAdapter;
    private String mCurrentFilter = null;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_contacts_list, container, false);
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        setHasOptionsMenu(true);

        getLoaderManager().initLoader(0, null, this);

        mAdapter = new IndexedListAdapter(this.getActivity(), R.layout.list_item_contacts, null,
                new String[] { ContactsContract.Contacts.DISPLAY_NAME }, new int[] { R.id.display_name });

        setListAdapter(mAdapter);
        getListView().setFastScrollEnabled(true);

    }

    @Override
    public void onListItemClick(ListView l, View v, int position, long id) {
        mContactsListener.onContactNameSelected(id);
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);

        try {
            mContactsListener = (OnContactSelectedListener) activity;
        } catch (ClassCastException e) {
            throw new ClassCastException(activity.toString() + " must implement OnContactSelectedListener");
        }
    }

    @Override
    public Loader<Cursor> onCreateLoader(int arg0, Bundle arg1) {
        Uri baseUri;

        if (mCurrentFilter != null) {
            baseUri = Uri.withAppendedPath(Contacts.CONTENT_FILTER_URI, Uri.encode(mCurrentFilter));
        } else {
            baseUri = Contacts.CONTENT_URI;
        }

        String selection = "((" + Contacts.DISPLAY_NAME + " NOTNULL) AND (" + Contacts.HAS_PHONE_NUMBER
                + "=1) AND (" + Contacts.DISPLAY_NAME + " != '' ))";

        String sortOrder = ContactsContract.Contacts.DISPLAY_NAME + " COLLATE LOCALIZED ASC";

        return new CursorLoader(getActivity(), baseUri, CONTACTS_SUMMARY_PROJECTION, selection, null, sortOrder);
    }

    @Override
    public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
        mAdapter.swapCursor(data);
    }

    @Override
    public void onLoaderReset(Loader<Cursor> loader) {
        mAdapter.swapCursor(null);
    }

    class IndexedListAdapter extends SimpleCursorAdapter implements SectionIndexer {

        AlphabetIndexer alphaIndexer;

        public IndexedListAdapter(Context context, int layout, Cursor c, String[] from, int[] to) {
            super(context, layout, c, from, to, 0);
        }

        @Override
        public Cursor swapCursor(Cursor c) {
            if (c != null) {
                alphaIndexer = new AlphabetIndexer(c, c.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME),
                        " ABCDEFGHIJKLMNOPQRSTUVWXYZ");
            }

            return super.swapCursor(c);
        }

        @Override
        public int getPositionForSection(int section) {
            return alphaIndexer.getPositionForSection(section);
        }

        @Override
        public int getSectionForPosition(int position) {
            return alphaIndexer.getSectionForPosition(position);
        }

        @Override
        public Object[] getSections() {
            return alphaIndexer == null ? null : alphaIndexer.getSections();
        }

    }

}