Android Contacts, Reborn

Written with ♥️ and 🔥 since December 2018. Open sourced since October 2021.

This library provides a complete set of APIs to do everything you need with Contacts in Android. You no longer have to deal with the Contacts Provider, database operations, and cursors.

Whether you just need to get all or some Contacts for a small part of your app (written in Kotlin or Java), or you are looking to create your own full-fledged Contacts app with the same capabilities as the AOSP Android Contacts app and Google Contacts app, this library is for you!

Please help support this project 🙏❤️⭐️

Quick links

• 📜 Documentation
• 🚉 Current Release - 0.3.1
• 🚂 Upcoming Release - 0.3.2
• ℹ️ Project Status
• 🗺 Project Roadmap
• 💌 Why use this library?

Features

The core module provides,

• ✅ All data kinds in the Contacts Provider; address, email, event, group membership, IM, name, nickname, note, organization, phone, photo, relation, SIP address, and website
• ✅ Custom data integration
• ✅ Broad queries and advanced queries of Contacts and RawContacts from zero or more Accounts and/or Groups
• ✅ Phone lookup queries for specialized matching of phone or SIP
• ✅ Contact lookup keys
• ✅ Include only desired fields in read/write operations to optimize CPU and memory
• ✅ Powerful, type-safe query DSL
• ✅ Pagination using order by, limit, and offset database functions.
• ✅ Insert one or more RawContacts with an associated Account, causing automatic insertion of a new Contact subject to automatic aggregation by the Contacts Provider
• ✅ Update one or more Contacts, RawContacts, and Data
• ✅ Delete one or more Contacts, RawContacts, and Data
• ✅ Query, insert, update, and delete Profile (device owner) Contact, RawContact, and Data
• ✅ Query, insert, update, and delete Groups
• ✅ Query, insert update, and delete specific kinds of data
• ✅ Query, insert, update, and delete custom data
• ✅ Query, insert, and delete Blocked Numbers
• ✅ Query, insert, update, and delete SIM card contacts
• ✅ Query for Accounts in the system or RawContacts table
• ✅ Query for just RawContacts
• ✅ Move RawContacts across Accounts
• ✅ Link/unlink two or more Contacts
• ✅ Get/set contact options; starred (favorite), custom ringtone, send to voicemail
• ✅ Get/set Contacts/RawContact photo and thumbnail
• ✅ Get/set default (primary) Contact Data (e.g. default/primary phone number, email, etc)
• ✅ Share contacts via vCard (.VCF)
• ✅ Convenience functions
• ✅ Contact data is synced automatically across devices
• ✅ Support for logging API input and output
• ✅ Redactable entities and API input and output for production-safe logging that upholds user data privacy laws to meet GDPR guidelines (this is not legal advice)
• ✅ Full in-depth documentation/guides.
• ✅ Full Java interoptibilty
• ✅ Core APIs have zero dependency
• ✅ Clean separation between Contacts vs RawContacts
• ✅ Clear distinction between truly deeply immutable, mutable, new, and existing entities allowing for thread safety and JetPack compose optimizations

There are also extensions that add functionality to every core function,

• 🧰 Asynchronous work using Kotlin Coroutines
• 🧰 Permissions request/handling using Kotlin Coroutines
• 🔜 Kotlin Flow extensions
• 🔜 RxJava extensions

Also included are some pre-baked goodies to be used as is or just for reference,

• 🍬 Gender custom data
• 🍬 Google Contacts custom data
• 🍬 Handle name custom data
• 🍬 Pokemon custom data
• 🍬 Role Playing Game (RPG) custom data
• 🍬 Rudimentary contacts-integrated UI components
• 🍬 Debug functions to aid in development

There are also more features that are on the way!

1. ☢️ Work profile contacts
2. ☢️ Dynamically integrate custom data from other apps
3. ☢️ Auto-generated custom data using annotations
4. ☢️ Read/write from/to .VCF file
5. ☢️ Multi-SIM card support

Installation

ℹ️ This library is a multi-module project published with JitPack

First, include JitPack in the repositories list,

repositories {
    maven { url "https://jitpack.io" }
}

To install individual modules,

dependencies {
    implementation 'com.github.vestrel00.contacts-android:core:0.3.1'
    
    implementation 'com.github.vestrel00.contacts-android:async:0.3.1'
    implementation 'com.github.vestrel00.contacts-android:customdata-gender:0.3.1'
    implementation 'com.github.vestrel00.contacts-android:customdata-googlecontacts:0.3.1'
    implementation 'com.github.vestrel00.contacts-android:customdata-handlename:0.3.1'
    implementation 'com.github.vestrel00.contacts-android:customdata-pokemon:0.3.1'
    implementation 'com.github.vestrel00.contacts-android:customdata-rpg:0.3.1'
    implementation 'com.github.vestrel00.contacts-android:debug:0.3.1'
    implementation 'com.github.vestrel00.contacts-android:permissions:0.3.1'
    implementation 'com.github.vestrel00.contacts-android:test:0.3.1'
    implementation 'com.github.vestrel00.contacts-android:ui:0.3.1'
    // Notice that when importing specific modules/subprojects, the first ":" comes after "contacts-android".
}

The core module is really all you need. All other modules are optional.

To install all modules in a single line,

dependencies {
    implementation 'com.github.vestrel00:contacts-android:0.3.1'
    // Notice that when importing all modules, the first ":" comes after "vestrel00".
}

⚠️ Starting with version 0.2.0, installing all modules in a single line is only supported when using the dependencyResolutionManagement in settings.gradle. You are still able to install all modules by specifying them individually.

For more info about the different modules and dependency resolution management, read the Installation guide.

Setup

There is no setup required. It's up to you how you want to create and retain instances of the contacts.core.Contacts(context) API. For more info, read Contacts API Setup.

It is also useful to read about API Entities.

Quick Start

To retrieve all contacts containing all available contact data,

val contacts = Contacts(context).query().find()

To simply search for Contacts, yielding the exact same results as the AOSP Contacts app,

val contacts = Contacts(context)
    .broadQuery()
    .wherePartiallyMatches(searchText)
    .find()

ℹ️ For more info, read Query contacts.

Something a bit more advanced...

To retrieve the first 5 contacts (including only the contact id, display name, and phone numbers in the results) ordered by display name in descending order, matching ALL of these rules;

• a first name starting with "leo"
• has emails from gmail or hotmail
• lives in the US
• has been born prior to making this query
• is favorited (starred)
• has a nickname of "DarEdEvil" (case sensitive)
• works for Facebook
• has a note
• belongs to the account of "john.doe@gmail.com" or "john.doe@myspace.com"

val contacts = Contacts(context)
    .query()
    .where {
        (Name.GivenName startsWith "leo") and
        (Email.Address { endsWith("gmail.com") or endsWith("hotmail.com") }) and
        (Address.Country equalToIgnoreCase "us") and
        (Event { (Date lessThan Date().toWhereString()) and (Type equalTo EventEntity.Type.BIRTHDAY) }) and
        (Contact.Options.Starred equalTo true) and
        (Nickname.Name equalTo "DarEdEvil") and
        (Organization.Company `in` listOf("facebook", "FB")) and
        (Note.Note.isNotNullOrEmpty())
    }
    .accounts(
        Account("john.doe@gmail.com", "com.google"),
        Account("john.doe@myspace.com", "com.myspace"),
    )
    .include { setOf(
        Contact.Id,
        Contact.DisplayNamePrimary,
        Phone.Number
    ) }
    .orderBy(ContactsFields.DisplayNamePrimary.desc())
    .offset(0)
    .limit(5)
    .find()

ℹ️ For more info, read Query contacts (advanced).

Once you have the contacts, you now have access to all of their data!

val contact: Contact
Log.d(
    "Contact",
    """
        ID: ${contact.id}
        Lookup Key: ${contact.lookupKey}

        Display name: ${contact.displayNamePrimary}
        Display name alt: ${contact.displayNameAlt}

        Photo Uri: ${contact.photoUri}
        Thumbnail Uri: ${contact.photoThumbnailUri}

        Last updated: ${contact.lastUpdatedTimestamp}

        Starred?: ${contact.options?.starred}
        Send to voicemail?: ${contact.options?.sendToVoicemail}
        Ringtone: ${contact.options?.customRingtone}

        Aggregate data from all RawContacts of the contact
        -----------------------------------
        Addresses: ${contact.addressList()}
        Emails: ${contact.emailList()}
        Events: ${contact.eventList()}
        Group memberships: ${contact.groupMembershipList()}
        IMs: ${contact.imList()}
        Names: ${contact.nameList()}
        Nicknames: ${contact.nicknameList()}
        Notes: ${contact.noteList()}
        Organizations: ${contact.organizationList()}
        Phones: ${contact.phoneList()}
        Relations: ${contact.relationList()}
        SipAddresses: ${contact.sipAddressList()}
        Websites: ${contact.websiteList()}
        -----------------------------------
    """.trimIndent()
    // There are also aggregate data functions that return a sequence instead of a list.
)

ℹ️ For more info, read about API Entities.

More than enough APIs that will allow you to build your own contacts app!

This library is capable of doing more than just querying contacts. Actually, you can build your own full-fledged contacts app with it!

Let's take a look at a few other APIs this library provides...

To get the first 20 gmail emails ordered by email address in descending order,

val emails = Contacts(context)
    .data()
    .query()
    .emails()
    .where { Email.Address endsWith "gmail.com" }
    .orderBy(Fields.Email.Address.desc(ignoreCase = true))
    .offset(0)
    .limit(20)
    .find()

It's not just for emails. It's for all data kinds (including custom data).

ℹ️ For more info, read Query specific data kinds.

To CREATE/INSERT a contact with a name of "John Doe" who works at Amazon with a work email of "john.doe@amazon.com" (in Kotlin),

val insertResult = Contacts(context)
    .insert()
    .rawContacts(NewRawContact().apply {
        name = NewName().apply {
            givenName = "John"
            familyName = "Doe"
        }
        organization = NewOrganization().apply {
            company = "Amazon"
            title = "Superstar"
        }
        emails.add(NewEmail().apply {
            address = "john.doe@amazon.com"
            type = EmailEntity.Type.WORK
        })
    })
    .commit()

Or alternatively, in a more Kotlinized style using named arguments,

val insertResult = Contacts(context)
    .insert()
    .rawContacts(NewRawContact(
        name = NewName(
            givenName = "John",
            familyName = "Doe"
        ),
        organization = NewOrganization(
            company = "Amazon",
            title = "Superstar"
        ),
        emails = mutableListOf(NewEmail(
            address = "john.doe@amazon.com",
            type = EmailEntity.Type.WORK
        ))
    ))
    .commit()

Or alternatively, using extension functions,

val insertResult = Contacts(context)
    .insert()
    .rawContact {
        setName {
            givenName = "John"
            familyName = "Doe"
        }
        setOrganization {
            company = "Amazon"
            title = "Superstar"
        }
        addEmail {
            address = "john.doe@amazon.com"
            type = EmailEntity.Type.WORK
        }
    }
    .commit()

ℹ️ For more info, read Insert contacts.

If John Doe switches jobs and heads over to Microsoft, we can UPDATE his data,

Contacts(context)
    .update()
    .contacts(johnDoe.mutableCopy {
        setOrganization {
            company = "Microsoft"
            title = "Newb"
        }
        emails().first().apply {
            address = "john.doe@microsoft.com"
        }
    })
    .commit()

ℹ️ For more info, read Update contacts.

If we no longer like John Doe, we can DELETE him from our life,

Contacts(context)
    .delete()
    .contacts(johnDoe)
    .commit()

ℹ️ For more info, read Delete Contacts.

Threading and permissions

This library provides Kotlin coroutine extensions in the permissions module for all API functions to handle permissions and async module for executing work in background threads.

launch {
    val contacts = Contacts(context)
        .queryWithPermission()
        ...
        .findWithContext()

    val deferredResult = Contacts(context)
        .insertWithPermission()
        ...
        .commitAsync()
    val result = deferredResult.await()
}

ℹ️ For more info, read Permissions handling using coroutines and Execute work outside of the UI thread using coroutines.

So, if we call the above function and we don't yet have permission. The user will be prompted to give the appropriate permissions before the query proceeds. Then, the work is done in the coroutine context of choice (default is Dispatchers.IO). If the user does not give permission, the query will return no results.

ℹ️ Extensions for Kotlin Flow and RxJava are also in the project roadmap, which includes APIs for listening to Contacts database changes.

Full documentation, guides, and samples

The above examples barely scratches the surface of what this library provides. For more in-depth documentation, visit the GitHub Pages. For a sample app reference, take a look at and run the sample module.

All APIs in the library are optimized!

Some other APIs or util functions out there typically perform one internal database query per contact returned. They do this to fetch the data per contact. This means that if there are 1,000 matching contacts, then an extra 1,000 internal database queries are performed! This is not cool!

To address this issue, the query APIs provided in the Contacts, Reborn library, perform only at least two internal database queries no matter how many contacts are matched! Even if there are 10,000 contacts matched, the library will only perform two internal database queries (depending on your query parameters). Fetch 10,000 contacts as fast as 99 milliseconds (varies per device)!

ℹ️ For more info, read Optimizing queries.

Of course, if you don't want to fetch all hundreds of thousands of contacts, the query APIs support pagination with limit and offset functions!

Cancellations are also supported! To cancel a query amid execution,

.find { returnTrueIfQueryShouldBeCancelled() }

The find function optionally takes in a function that, if it returns true, will cancel query processing as soon as possible. The function is called numerous times during query processing to check if processing should stop or continue. This gives you the option to cancel the query.

This is useful when used in multi-threaded environments. One scenario where this would be frequently used is when performing queries as the user types a search text. You are able to cancel the current query when the user enters new text.

For example, to automatically cancel the query inside a Kotlin coroutine when the coroutine is cancelled,

launch {
    withContext(coroutineContext) {
        val contacts = query.find { !isActive }
    }
    // Or, using the coroutine extensions in the async module...
    val contacts = query.findWithContext()
}

All core APIs are framework-agnostic and works well with Java and Kotlin

The API does not and will not force you to use any frameworks (e.g. RxJava or Coroutines/Flow)! All core functions of the API live in the core module, which you can import to your project all by itself. Don't believe me? Take a look at the dependencies in the core/build.gradle :D

So, feel free to use the core API however you want with whatever libraries or frameworks you want, such as Reactive, Coroutines/Flow, AsyncTask (hope not), WorkManager, and whatever permissions handling APIs you want to use.

All other modules in this library are optional and are just there for your convenience or for reference.

I also made sure that all core functions and entities are interoperable with Java. So, if you were wondering why I’m using a semi-builder pattern instead of using named arguments with default values, that is why. I’ve also made some other intentional decisions about API design to ensure the best possible experience for both Kotlin and Java consumers without sacrificing Kotlin language standards. It is Kotlin-first, Java-second (with love and care).

⚠️ Modules other than the core module are not guaranteed to be compatible with Java.

Requirements

• Min SDK 19+

Proguard

If you use Proguard and the async and/or permissions modules, then you may need to add rules for Coroutines.

License

Copyright 2023 Contacts Contributors

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   https://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.