Develop Reference

Show only a certain number of contacts

I have developed a program that shows a list of contacts from my phone book.
For this I use the following code:
ContentResolver cr = getContentResolver();
Cursor cursor = cr.query(ContactsContract.Contacts.CONTENT_URI,
null,
ContactsContract.Contacts.HAS_PHONE_NUMBER + " = '1'",
null,
ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME + " COLLATE LOCALIZED ASC");
if (cursor != null && cursor.getCount() > 0) {
while (cursor.moveToNext()) {
String id = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID));
String name = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
Uri.withAppendedPath(ContactsContract.Contacts.CONTENT_URI, String.valueOf(id));
Cursor phones = cr.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
null,
ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = " + id,
null,
null);
if (phones != null) {
while (phones.moveToNext()) {
String phoneNumber = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
contactList.add(new Contact(name, phoneNumber, id));
}
phones.close();
}
}
cursor.close();
}
adapter = new ContactAdapter(contactList, R.layout.contacts_list_item, getApplicationContext());
recyclerView.setAdapter(adapter);
Everything works, and the program displays all contacts from my phone book, but I want a certain number of contacts to be displayed. For example:
I open the program and load the first 50 contacts from the phone book, after scrolling, the next 50 contacts are loaded to the end of the list. and so on

Use below code that has limit cause. Replace your code with below
Cursor cursor = cr.query(ContactsContract.Contacts.CONTENT_URI,
null,
ContactsContract.Contacts.HAS_PHONE_NUMBER + " = '1' ",
null,
ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME + " COLLATE LOCALIZED ASC LIMIT 10");
It will get first 10 records. And in pull to refresh implementation, get more records on call back event of pull to refresh. Hope this will help you

I assume the reason you want this is because loading all contacts is very slow.
The reason it's very slow is because you currently have 1 query per contact, so if a user has 500 contacts, you'll need to run 500 queries.
You can reduce the number of queries to just one, then I assume you won't need the limit thing.
String[] projection = { Phone.CONTACT_ID, Phone.DISPLAY_NAME, Phone.NUMBER };
Cursor phones = getContentResolver().query(Phone.CONTENT_URI, projection, null, null, Phone.DISPLAY_NAME + " ASC");
while (phones.moveToNext()) {
String name = phones.getString(1);
String phone = phones.getString(2);
Long id = phones.getLong(0);
contactList.add(new Contact(name, phone, id));
}
phones.close();
If you want to display only one item per contact, and not per phone, you can change your contactList field to be a HashMap<Long, Contact> instead of a List, and add newly found phones to an existing Contact object if it already exists in the Map.
Something like:
Contact contact = allContacts.get(id);
if (contact == null) {
contact = new Contact(name, phone, id);
allContacts.put(id, contact);
} else {
contact.addPhone(phone); // you'll need to implement this
}

How to read frequently contacts in android

I'm trying to get frequently called list. CONTENT_STREQUENT_URI gives you starred and frequently and i want just frequently.
Cursor c = this.getContentResolver (). query (Contacts.CONTENT_STREQUENT_URI,
null, null, null,null);

This may help you in getting frequent/starred contacts that you are searching for. I wrote the getPhoneNumbers method out for you as an example of how to pull the information out of the cursor. Also, note that if you remove the contacts from your device/ unstar them, this will not automatically update your ui. You will need to resync your data. To do this, there are a few ways. In my opinion, if you just refetch this data again it won't be too bad, as you probably don't have too many starred contacts. But for bigger input size, you will want to paginate this list and find a more elegant way than fetching this data every time.
public static List<? extends ContactsModel> getFreqContacts(Context context) {
List<ContactsModel> contacts = new ArrayList<>();
ContentResolver contentResolver = context.getContentResolver();
Cursor cursor = contentResolver.query(ContactsContract.Contacts.CONTENT_URI, null, "starred=?", new String[]{"1"}, "upper(" + ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME + ") ASC");
if(cursor.getCount() > 0) {
while (cursor.moveToNext()) {
final String name = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
final String contact_id = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID));
final Set<String> phone_numbers = getContactPhoneNumber(contentResolver, cursor, contact_id);
final Set<String> emails = getContactEmailAddress(contentResolver, contact_id);
// do whatever you want. Now you have the phone numbers and emails of the contacts you want
}
}
cursor.close();
Collections.sort(faveContactsModels);
return faveContactsModels;
}
private static Set<String> getContactPhoneNumber(ContentResolver contentResolver, Cursor cursor,String id) {
Set<String> contactNumbers = new HashSet<>();
if(Integer.parseInt(cursor.getString(
cursor.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER))) > 0
) {
Cursor pCur = contentResolver.query(
ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
null,
ContactsContract.CommonDataKinds.Phone.CONTACT_ID + "= ?",
new String[]{id}, null
);
while(pCur.moveToNext()) {
String phoneNo = pCur.getString(pCur.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
contactNumbers.add(phoneNo);
}
pCur.close();
}
return contactNumbers;
}

Frequent queries on android contacts returns null

I'm using the following code segment to get phone numbers of a contact by contact ID
private static ArrayList<PhoneName> getPhonesFromID(Context context,
String contactID, String column) {
// Run query
Uri uri = ContactsContract.CommonDataKinds.Phone.CONTENT_URI;
String[] projection = new String[] {
ContactsContract.CommonDataKinds.Phone._ID,
ContactsContract.CommonDataKinds.Phone.CONTACT_ID,
ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME,
ContactsContract.CommonDataKinds.Phone.NUMBER,
ContactsContract.CommonDataKinds.Phone.STARRED,
ContactsContract.CommonDataKinds.Phone.TYPE };
String selection = column + " = '" + contactID + "'";
String[] selectionArgs = null;
String sortOrder = ContactsContract.CommonDataKinds.Phone.NUMBER
+ " COLLATE LOCALIZED ASC";
Cursor cursor = context.getContentResolver().query(uri, projection,
selection, selectionArgs, sortOrder);
if (cursor == null)
return null;
int numberIndex = cursor
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);
int nameIndex = cursor
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME);
int typeIndex = cursor
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.TYPE);
int favIndex = cursor
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.STARRED);
ArrayList<PhoneName> phones = new ArrayList<PhoneName>();
while (cursor.moveToNext()) {
PhoneName pn = new PhoneName();
pn.name = cursor.getString(nameIndex);
pn.number = cursor.getString(numberIndex);
pn.starred = cursor.getString(favIndex);
pn.state = DataHelper.getInstance(context)
.getSubscriptionStateByNumber(pn.number);
Log.d("Number", pn.number);
int type = cursor.getInt(typeIndex);
if (type == ContactsContract.CommonDataKinds.Phone.TYPE_HOME) {
pn.type = "Home";
} else if (type == ContactsContract.CommonDataKinds.Phone.TYPE_MOBILE) {
pn.type = "Mobile";
} else if (type == ContactsContract.CommonDataKinds.Phone.TYPE_WORK) {
pn.type = "work";
} else {
pn.type = "other";
}
phones.add(pn);
}
cursor.close();
return phones;
}
Here's PhoneName is my self-defined class to store contact information of that specific contact. This function is called like:
getPhonesFromID(context, _id,
ContactsContract.CommonDataKinds.Phone.CONTACT_ID);
I'm getting the contact information correctly but here's the problem, sometimes this function returns null when I make frequent queries. When this problem occurs, default people application of my android don't show any contact too. All contacts are like vanished. Then if I close my application and restart then it shows all contacts like before. Then again when I go to the contact details of a contact from my application it works fine several times and then all contacts are gone again.
This is a weird problem and I don't know actually what is happening here. I double checked my queries and couldn't figure out what's wrong in here.

Finally, this problem got solved.
Like I said, my application is like Phonebook and I had to show a favourite icon for each contact in the list which is my favourite contact. In my case, I had a function like isFavourite() to determine if a contact is in my favourite list or not and this is called in every single time when a contact row is loading.
Each time I open a cursor to get the query result and it was found that the cursor was not closed anywhere. So basically, closing the cursor properly solved the problem! Cheers!

Get only numbers shown in the android contactbook

I want to filter what numbers I am getting from Android based on which contacts the user chose to display in his contact book. (For example only contacts saved on the device when all other contacts are excluded)
I read here that you can do this by using
Uri queryUri = ContactsContract.Contacts.CONTENT_URI;
I use following code to read the contacts and I allways get every contact, phone, SIM, etc..
//https://stackoverflow.com/questions/16651609/how-to-display-phone-contacts-only-exclude-sim-contacts
// http://www.higherpass.com/Android/Tutorials/Working-With-Android-Contacts/1/
ContentResolver cr = currentActivity.getContentResolver();
Uri queryUri = ContactsContract.Contacts.CONTENT_URI;
Cursor cur = cr.query(queryUri,
null, null, null, null);
if (cur.getCount() > 0) {
while (cur.moveToNext()) { //Are there still contacts?
//See if the contact has at least one number
if (Integer.parseInt(cur.getString(cur.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER))) > 0) {
String id = cur.getString( cur.getColumnIndex(ContactsContract.Contacts._ID) );
String name = cur.getString( cur.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME) );
ArrayList<String> numbers = new ArrayList<String>();
//Read numbers:
Cursor pCur = cr.query(
ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
null,
ContactsContract.CommonDataKinds.Phone.CONTACT_ID +" = ?",
new String[]{id}, null);
while (pCur.moveToNext()) {
numbers.add( pCur.getString(
pCur.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER)) );
Log.e("Contactbook", "The latest added number is: " + numbers.get(numbers.size()-1) );
}
pCur.close();
}
}
}
What am I missing? This code still gives me both SIM and phone contacts to the log.
Edit: To clarifify, in the contactbook you got the "Display options". In there ist the "select contacts to display"-option, and I want to read the contacts that are shown based on the users choice there. So if a user choses to show only SIM-contacts, read only SIM-contacts, if he choses to only show Phone-Contacts, show onyl phone contacts etc...

Try with following "selection".
String selection = ContactsContract.Contacts.IN_VISIBLE_GROUP + " = ?";
From Android docs:
public static final String IN_VISIBLE_GROUP: An indicator of whether this contact is supposed to be visible in the UI. "1" if the contact has at least one raw contact that belongs to a visible group; "0" otherwise.
This should be your "selection" argument in query API.
Update: I tried below code on Android-2.3(I know it is old device, but right now Don't have newer device with me).
final ContentResolver cr = getContentResolver();
String[] projection = new String[] { ContactsContract.Contacts._ID, ContactsContract.Contacts.DISPLAY_NAME };
String selection = ContactsContract.Contacts.IN_VISIBLE_GROUP + " = ?" ;
String[] Args = { "1" };
final Cursor contacts = cr.query(
ContactsContract.Contacts.CONTENT_URI, projection,
selection,Args ,
null);
This could be a long operation (depending on no. of contacts), hence you should use CursorLoader class (A loader that queries the ContentResolver and returns a Cursor) for this.
cursorLoader.loadInBackground();
This will be called on a worker thread to perform the actual load and to return the result of the load operation.

You can easily create two Arrays for each kind of contacts
ArrayList<String> simContacts = new ArrayList<>();
//get all sim contacts
Uri simUri = Uri.parse("content://icc/adn");
Cursor cursorSim = getContext().getContentResolver().query(simUri, null, null, null, null);
while (cursorSim.moveToNext()) {
simContacts.add(cursorSim.getString(cursorSim.getColumnIndex("name")));
}
}
ArrayList<String> allContacts = new ArrayList<>();
//get all contacts
Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI,
null, null, null, null);
if (cursor != null && cursor.getCount() > 0) {
while (!cursor.isAfterLast()) {
String phoneNumber = cursor.getString(cursor.getColumnIndexOrThrow(ContactsContract.CommonDataKinds.Phone.NUMBER));
String displayNameColumn = Utils.hasHoneycomb() ? ContactsContract.Contacts.DISPLAY_NAME_PRIMARY : ContactsContract.Contacts.DISPLAY_NAME;
String displayName = cursor.getString(cursor.getColumnIndexOrThrow(displayNameColumn));
//check if simContacts Array contains this particular name
if (!simContacts.contains(displayNameColumn){
allContacts.add(displayNameColumn);
}
}
}
This is just a working example,of course you can modify to your needs.You can parse more contact fields and make more complication queries.

Android - How to fetch a contact name and number without using Cursors?

I have a big performance issue in my app. After going through traceview i found that most of my app's performance has been consumed by cursors. So i was wondering is there any alternative to Cursors for dealing with device contact list. And if there is no alternative then please advise me how to deal with cursors so it won't slow down your app.
Please HELP!!
Thanks.
This part of my code has performance issue :-
public void getDisplayName()
{
Cursor c1 = this.getContentResolver().query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);
String personName = null, number = null;
try
{
Log.e(TAG, "I am here!!");
if(c1.getCount() > 0)
{
Log.e(TAG, "I am here2!!");
while(c1.moveToNext())
{
HashMap<String,String> item = new HashMap<String,String>();
String id = c1.getString(c1.getColumnIndex(Contacts._ID));
personName = c1.getString(c1.getColumnIndex(Contacts.DISPLAY_NAME));
item.put("Name", personName);
Cursor cur = this.getContentResolver().query(CommonDataKinds.Phone.CONTENT_URI, null, CommonDataKinds.Phone.CONTACT_ID +" = ?", new String[]{id}, null);
while(cur.moveToNext())
{
Log.e(TAG, "I am here!!3");
number = cur.getString(cur.getColumnIndex(CommonDataKinds.Phone.NUMBER));
item.put("Number", number);
}
displayName.add(item);
}
}
}
finally
{
c1.close();
}
}

How to fetch a contact name and number without using Cursors?
That is not possible.
I have a big performance issue in my app.
Rather than using a single query, you use N+1 queries, where N is the number of rows returned by the other query. This is guaranteed to give you poor performance compared to just doing a single query.
You can get the user's name and _ID along with the phone numbers:
String[] PROJECTION=new String[] { Contacts._ID,
Contacts.DISPLAY_NAME,
Phone.NUMBER
};
Cursor c=a.managedQuery(Phone.CONTENT_URI, PROJECTION, null, null, null);
Also, never call getColumnIndex() in a loop, since the value never changes.

I was working on same code and I need email and phone numbers both in first approach It took around 35 seconds to fetch 612 contacts, when I optimized it, it took 2 seconds to fetch 612 contacts
my code.
ContentResolver cr = context.getContentResolver();
String[] projection = new String[] { Contacts.DISPLAY_NAME, Phone.NUMBER };
String selection = ContactsContract.Contacts.HAS_PHONE_NUMBER + " = ?";
String[] selectionArgs = { String.valueOf(1) };
Cursor cur = cr.query(Phone.CONTENT_URI, projection, selection, selectionArgs, null);
if (cur.getCount() > 0) {
while (cur.moveToNext()) {
String name = cur.getString(cur.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
String phNo = cur.getString(cur.getColumnIndex(Phone.NUMBER));
ContactModel contactModel = new ContactModel();
contactModel.setName(name);
contactModel.setPhoneNumber(phNo);
contactList.add(contactModel);
}
}
String[] projectionEmail = new String[] { Contacts.DISPLAY_NAME, Email.ADDRESS };
String selectionEmail = ContactsContract.Contacts.HAS_PHONE_NUMBER + " = ?";
String[] selectionArgsEmail = { String.valueOf(1) };
Cursor curEmail = cr.query(Email.CONTENT_URI, projectionEmail, selectionEmail, selectionArgsEmail, null);
if (curEmail.getCount() > 0) {
while (curEmail.moveToNext()) {
String Emailname = curEmail.getString(curEmail.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
String email = curEmail.getString(curEmail.getColumnIndex(Email.ADDRESS));
ContactModel contactModel = new ContactModel();
contactModel.setName(Emailname);
contactModel.setEmailId(email);
contactList.add(contactModel);
}
}
`