How to fast the contacts loading in listview on android

Question

in my app i am listing contacts in a listview. no of contacts is 1000+. i get the contacts

by using ContentResolver query that is cr.query(...),store the values in an arraylist

and after that load the array list in setListAdapter(...). to display the all contacts my

apps takes nearly 1 minute so that i use Async task but there is no big differences by using the async task.

i need to display all contacts within 2 to 4 seconds. i check in the default contacts application on android simulator which is load within in 2 to 4 seconds. i have spend

long time in google. but i could not get any helpful solution. please help me how to fast the loading contacts on listview. please help me.

my coding sample:

    private ArrayList<ContactListEntry> loadContactListInternal(String searchString) {
        ArrayList<ContactListEntry> contactList = new ArrayList<ContactListEntry>();
    ContentResolver cr = getContentResolver();
    Cursor cur = null;
    String[] projection = new String[] {BaseColumns._ID,ContactsContract.Contacts.DISPLAY_NAME,ContactsContract.Contacts.PHOTO_ID};
    ....
        cur=cr.query(ContactsContract.Contacts.CONTENT_URI, projection, selection, null, ContactsContract.Contacts.DISPLAY_NAME + " ASC");

    while (cur.moveToNext()) {
         int id = Integer.parseInt(cur.getString(0));
             ....   
        if (input !=null)
            photo = BitmapFactory.decodeStream(input);
         ....
        ArrayList<ContactListEntry.PhoneEntry> phoneEntries = new ArrayList<ContactListEntry.PhoneEntry>();

            String[] projection1 = new String[] {ContactsContract.CommonDataKinds.Phone.NUMBER,ContactsContract.CommonDataKinds.Phone.TYPE};    
            Cursor pcur = cr.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI,projection1, ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = ?", new String[] { String.valueOf(id) }, null);
            while (pcur.moveToNext()) {
                ...
            }
            pcur.close();

            ContactListEntry entry = new ContactListEntry(id, name, photo, phoneEntries);
            contactList.add(entry);
    }
    cur.close();

    return contactList;
}
    .....
    in another class
        private void selectionUpdated() {
                ....
         setListAdapter(new SelectedArrayAdapter(this, app.selectedContacts));
            ... 
       }

Answer 1

i use cursor adapter and i cut the databse,arrayadapter and optimize the code.