Move system contact interactions into their own module.

contacts/app/src/main/AndroidManifest.xml

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="org.signal.contactstest">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.ContactsTest">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <activity
+            android:name=".ContactsActivity"
+            android:exported="false" />
+
+
+        <service
+            android:name=".AccountAuthenticatorService"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.accounts.AccountAuthenticator" />
+            </intent-filter>
+            <meta-data
+                android:name="android.accounts.AccountAuthenticator"
+                android:resource="@xml/authenticator" />
+        </service>
+    </application>
+
+</manifest>

contacts/app/src/main/java/org/signal/contactstest/AccountAuthenticatorService.kt

@@ -0,0 +1,63 @@
+package org.signal.contactstest
+
+import android.accounts.AbstractAccountAuthenticator
+import android.accounts.Account
+import android.accounts.AccountAuthenticatorResponse
+import android.accounts.AccountManager
+import android.app.Service
+import android.content.Context
+import android.content.Intent
+import android.os.Bundle
+import android.os.IBinder
+
+class AccountAuthenticatorService : Service() {
+  companion object {
+    private var accountAuthenticator: AccountAuthenticatorImpl? = null
+  }
+
+  override fun onBind(intent: Intent): IBinder? {
+    return if (intent.action == AccountManager.ACTION_AUTHENTICATOR_INTENT) {
+      getOrCreateAuthenticator().iBinder
+    } else {
+      null
+    }
+  }
+
+  @Synchronized
+  private fun getOrCreateAuthenticator(): AccountAuthenticatorImpl {
+    if (accountAuthenticator == null) {
+      accountAuthenticator = AccountAuthenticatorImpl(this)
+    }
+    return accountAuthenticator as AccountAuthenticatorImpl
+  }
+
+  private class AccountAuthenticatorImpl(context: Context) : AbstractAccountAuthenticator(context) {
+    override fun addAccount(response: AccountAuthenticatorResponse, accountType: String, authTokenType: String, requiredFeatures: Array<String>, options: Bundle): Bundle? {
+      return null
+    }
+
+    override fun confirmCredentials(response: AccountAuthenticatorResponse, account: Account, options: Bundle): Bundle? {
+      return null
+    }
+
+    override fun editProperties(response: AccountAuthenticatorResponse, accountType: String): Bundle? {
+      return null
+    }
+
+    override fun getAuthToken(response: AccountAuthenticatorResponse, account: Account, authTokenType: String, options: Bundle): Bundle? {
+      return null
+    }
+
+    override fun getAuthTokenLabel(authTokenType: String): String? {
+      return null
+    }
+
+    override fun hasFeatures(response: AccountAuthenticatorResponse, account: Account, features: Array<String>): Bundle? {
+      return null
+    }
+
+    override fun updateCredentials(response: AccountAuthenticatorResponse, account: Account, authTokenType: String, options: Bundle): Bundle? {
+      return null
+    }
+  }
+}

contacts/app/src/main/java/org/signal/contactstest/ContactsActivity.kt

@@ -0,0 +1,117 @@
+package org.signal.contactstest
+
+import android.content.Intent
+import android.graphics.BitmapFactory
+import android.net.Uri
+import android.os.Bundle
+import android.provider.ContactsContract
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ImageView
+import android.widget.TextView
+import androidx.activity.viewModels
+import androidx.appcompat.app.AppCompatActivity
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.ListAdapter
+import androidx.recyclerview.widget.RecyclerView
+import org.signal.contacts.SystemContactsRepository.ContactDetails
+import org.signal.contacts.SystemContactsRepository.ContactPhoneDetails
+
+class ContactsActivity : AppCompatActivity() {
+  override fun onCreate(savedInstanceState: Bundle?) {
+    super.onCreate(savedInstanceState)
+
+    setContentView(R.layout.activity_contacts)
+
+    val list: RecyclerView = findViewById(R.id.list)
+    val adapter = ContactsAdapter()
+
+    list.layoutManager = LinearLayoutManager(this)
+    list.adapter = adapter
+
+    val viewModel: ContactsViewModel by viewModels()
+    viewModel.contacts.observe(this) { adapter.submitList(it) }
+  }
+
+  private inner class ContactsAdapter : ListAdapter<ContactDetails, ContactViewHolder>(object : DiffUtil.ItemCallback<ContactDetails>() {
+    override fun areItemsTheSame(oldItem: ContactDetails, newItem: ContactDetails): Boolean {
+      return oldItem == newItem
+    }
+
+    override fun areContentsTheSame(oldItem: ContactDetails, newItem: ContactDetails): Boolean {
+      return oldItem == newItem
+    }
+  }) {
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ContactViewHolder {
+      return ContactViewHolder(LayoutInflater.from(parent.context).inflate(R.layout.parent_item, parent, false))
+    }
+
+    override fun onBindViewHolder(holder: ContactViewHolder, position: Int) {
+      holder.bind(getItem(position))
+    }
+  }
+
+  private inner class ContactViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
+    val givenName: TextView = itemView.findViewById(R.id.given_name)
+    val familyName: TextView = itemView.findViewById(R.id.family_name)
+    val phoneAdapter: PhoneAdapter = PhoneAdapter()
+    val phoneList: RecyclerView = itemView.findViewById<RecyclerView?>(R.id.phone_list).apply {
+      layoutManager = LinearLayoutManager(itemView.context)
+      adapter = phoneAdapter
+    }
+
+    fun bind(contact: ContactDetails) {
+      givenName.text = "Given Name: ${contact.givenName}"
+      familyName.text = "Family Name: ${contact.familyName}"
+      phoneAdapter.submitList(contact.numbers)
+    }
+  }
+
+  private inner class PhoneAdapter : ListAdapter<ContactPhoneDetails, PhoneViewHolder>(object : DiffUtil.ItemCallback<ContactPhoneDetails>() {
+    override fun areItemsTheSame(oldItem: ContactPhoneDetails, newItem: ContactPhoneDetails): Boolean {
+      return oldItem == newItem
+    }
+
+    override fun areContentsTheSame(oldItem: ContactPhoneDetails, newItem: ContactPhoneDetails): Boolean {
+      return oldItem == newItem
+    }
+  }) {
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): PhoneViewHolder {
+      return PhoneViewHolder(LayoutInflater.from(parent.context).inflate(R.layout.child_item, parent, false))
+    }
+
+    override fun onBindViewHolder(holder: PhoneViewHolder, position: Int) {
+      holder.bind(getItem(position))
+    }
+  }
+
+  private inner class PhoneViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
+    val photo: ImageView = itemView.findViewById(R.id.contact_photo)
+    val displayName: TextView = itemView.findViewById(R.id.display_name)
+    val number: TextView = itemView.findViewById(R.id.number)
+    val type: TextView = itemView.findViewById(R.id.type)
+    val goButton: View = itemView.findViewById(R.id.go_button)
+
+    fun bind(details: ContactPhoneDetails) {
+      if (details.photoUri != null) {
+        photo.setImageBitmap(BitmapFactory.decodeStream(itemView.context.contentResolver.openInputStream(Uri.parse(details.photoUri))))
+      } else {
+        photo.setImageBitmap(null)
+      }
+      displayName.text = details.displayName
+      number.text = details.number
+      type.text = ContactsContract.CommonDataKinds.Phone.getTypeLabel(itemView.resources, details.type, details.label)
+      goButton.setOnClickListener {
+        startActivity(
+          Intent(Intent.ACTION_VIEW).apply {
+            data = details.contactUri
+          }
+        )
+      }
+    }
+  }
+}

contacts/app/src/main/java/org/signal/contactstest/ContactsViewModel.kt

@@ -0,0 +1,52 @@
+package org.signal.contactstest
+
+import android.accounts.Account
+import android.app.Application
+import androidx.lifecycle.AndroidViewModel
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import org.signal.contacts.SystemContactsRepository
+import org.signal.contacts.SystemContactsRepository.ContactDetails
+import org.signal.contacts.SystemContactsRepository.ContactIterator
+import org.signal.core.util.concurrent.SignalExecutors
+import org.signal.core.util.logging.Log
+
+class ContactsViewModel(application: Application) : AndroidViewModel(application) {
+
+  companion object {
+    private val TAG = Log.tag(ContactsViewModel::class.java)
+  }
+
+  private val _contacts: MutableLiveData<List<ContactDetails>> = MutableLiveData()
+
+  val contacts: LiveData<List<ContactDetails>>
+    get() = _contacts
+
+  init {
+    SignalExecutors.BOUNDED.execute {
+      val account: Account? = SystemContactsRepository.getOrCreateSystemAccount(
+        context = application,
+        applicationId = BuildConfig.APPLICATION_ID,
+        accountDisplayName = "Test"
+      )
+
+      if (account != null) {
+        val contactList: List<ContactDetails> = SystemContactsRepository.getAllSystemContacts(
+          context = application,
+          rewrites = emptyMap(),
+          e164Formatter = { number -> number }
+        ).use { it.toList() }
+
+        _contacts.postValue(contactList)
+      } else {
+        Log.w(TAG, "Failed to create an account!")
+      }
+    }
+  }
+
+  private fun ContactIterator.toList(): List<ContactDetails> {
+    val list: MutableList<ContactDetails> = mutableListOf()
+    forEach { list += it }
+    return list
+  }
+}

contacts/app/src/main/java/org/signal/contactstest/MainActivity.kt

@@ -0,0 +1,51 @@
+package org.signal.contactstest
+
+import android.Manifest
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.os.Bundle
+import android.widget.Button
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.content.ContextCompat
+import org.signal.core.util.logging.Log
+
+class MainActivity : AppCompatActivity() {
+
+  companion object {
+    private val TAG = Log.tag(MainActivity::class.java)
+    private const val PERMISSION_CODE = 7
+  }
+
+  override fun onCreate(savedInstanceState: Bundle?) {
+    super.onCreate(savedInstanceState)
+
+    setContentView(R.layout.activity_main)
+
+    if (hasPermission(Manifest.permission.READ_CONTACTS) && hasPermission(Manifest.permission.WRITE_CONTACTS)) {
+      Log.i(TAG, "Already have permission.")
+      startActivity(Intent(this, ContactsActivity::class.java))
+      finish()
+      return
+    }
+
+    findViewById<Button>(R.id.permission_button).setOnClickListener { v ->
+      requestPermissions(arrayOf(Manifest.permission.READ_CONTACTS, Manifest.permission.WRITE_CONTACTS), PERMISSION_CODE)
+    }
+  }
+
+  override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
+    if (requestCode == PERMISSION_CODE) {
+      if (grantResults.isNotEmpty() && grantResults.all { it == PackageManager.PERMISSION_GRANTED }) {
+        startActivity(Intent(this, ContactsActivity::class.java))
+        finish()
+      } else {
+        Toast.makeText(this, "You must provide permissions to continue.", Toast.LENGTH_SHORT).show()
+      }
+    }
+  }
+
+  private fun hasPermission(permission: String): Boolean {
+    return ContextCompat.checkSelfPermission(this, permission) == PackageManager.PERMISSION_GRANTED
+  }
+}

contacts/app/src/main/res/drawable-v24/ic_launcher_foreground.xml

@@ -0,0 +1,31 @@
+<vector
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+  <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+    <aapt:attr name="android:fillColor">
+      <gradient
+          android:endX="85.84757"
+          android:endY="92.4963"
+          android:startX="42.9492"
+          android:startY="49.59793"
+          android:type="linear">
+        <item
+            android:color="#44000000"
+            android:offset="0.0" />
+        <item
+            android:color="#00000000"
+            android:offset="1.0" />
+      </gradient>
+    </aapt:attr>
+  </path>
+  <path
+      android:fillColor="#FFFFFF"
+      android:fillType="nonZero"
+      android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+      android:strokeWidth="1"
+      android:strokeColor="#00000000" />
+</vector>

contacts/app/src/main/res/drawable/ic_launcher_background.xml

@@ -0,0 +1,171 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+  <path
+      android:fillColor="#3DDC84"
+      android:pathData="M0,0h108v108h-108z" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M9,0L9,108"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M19,0L19,108"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M29,0L29,108"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M39,0L39,108"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M49,0L49,108"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M59,0L59,108"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M69,0L69,108"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M79,0L79,108"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M89,0L89,108"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M99,0L99,108"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M0,9L108,9"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M0,19L108,19"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M0,29L108,29"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M0,39L108,39"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M0,49L108,49"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M0,59L108,59"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M0,69L108,69"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M0,79L108,79"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M0,89L108,89"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M0,99L108,99"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M19,29L89,29"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M19,39L89,39"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M19,49L89,49"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M19,59L89,59"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M19,69L89,69"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M19,79L89,79"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M29,19L29,89"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M39,19L39,89"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M49,19L49,89"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M59,19L59,89"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M69,19L69,89"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+  <path
+      android:fillColor="#00000000"
+      android:pathData="M79,19L79,89"
+      android:strokeWidth="0.8"
+      android:strokeColor="#33FFFFFF" />
+</vector>

contacts/app/src/main/res/layout/activity_contacts.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".MainActivity">
+
+  <androidx.recyclerview.widget.RecyclerView
+      android:id="@+id/list"
+      android:layout_width="match_parent"
+      android:layout_height="match_parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

contacts/app/src/main/res/layout/activity_main.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".MainActivity">
+
+    <Button
+        android:id="@+id/permission_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Permissions"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

contacts/app/src/main/res/layout/child_item.xml

@@ -0,0 +1,67 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_marginBottom="4dp"
+    android:clipChildren="false"
+    android:clipToPadding="false"
+    app:cardCornerRadius="5dp"
+    app:cardElevation="5dp">
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:padding="4dp">
+
+        <ImageView
+            android:id="@+id/contact_photo"
+            android:layout_width="40dp"
+            android:layout_height="40dp"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintBottom_toBottomOf="parent"/>
+
+        <TextView
+            android:id="@+id/display_name"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="4dp"
+            android:layout_marginBottom="2dp"
+            android:fontFamily="monospace"
+            tools:text="Spider-Man"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintStart_toEndOf="@id/contact_photo"
+            app:layout_constraintEnd_toEndOf="parent"/>
+
+        <TextView
+            android:id="@+id/number"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            tools:text="(111) 222-3333"
+            app:layout_constraintTop_toBottomOf="@id/display_name"
+            app:layout_constraintStart_toStartOf="@id/display_name"
+            app:layout_constraintEnd_toEndOf="parent" />
+
+        <TextView
+            android:id="@+id/type"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            tools:text="Mobile"
+            app:layout_constraintTop_toBottomOf="@id/number"
+            app:layout_constraintStart_toStartOf="@id/number"
+            app:layout_constraintEnd_toEndOf="parent" />
+
+        <com.google.android.material.button.MaterialButton
+            android:id="@+id/go_button"
+            android:layout_width="60dp"
+            android:layout_height="0dp"
+            android:text="Go"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintBottom_toBottomOf="parent" />
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
+
+</androidx.cardview.widget.CardView>

contacts/app/src/main/res/layout/parent_item.xml

@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:padding="5dp"
+    android:clipToPadding="false"
+    android:clipChildren="false">
+
+  <androidx.cardview.widget.CardView
+      android:layout_width="match_parent"
+      android:layout_height="wrap_content"
+      app:cardElevation="5dp"
+      app:cardCornerRadius="5dp"
+      app:layout_constraintTop_toTopOf="parent"
+      app:layout_constraintStart_toStartOf="parent">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:padding="4dp"
+        android:clipChildren="false"
+        android:clipToPadding="false">
+
+      <TextView
+          android:id="@+id/given_name"
+          android:layout_width="match_parent"
+          android:layout_height="wrap_content"
+          android:fontFamily="monospace"
+          tools:text="Spider-Man"/>
+
+      <TextView
+          android:id="@+id/family_name"
+          android:layout_width="match_parent"
+          android:layout_height="wrap_content"
+          android:layout_marginBottom="4dp"
+          android:fontFamily="monospace"
+          tools:text="Spider-Man"/>
+
+      <androidx.recyclerview.widget.RecyclerView
+          android:id="@+id/phone_list"
+          android:layout_width="match_parent"
+          android:layout_height="wrap_content"
+          android:clipChildren="false"
+          android:clipToPadding="false"/>
+
+    </LinearLayout>
+
+  </androidx.cardview.widget.CardView>
+
+</androidx.constraintlayout.widget.ConstraintLayout>

contacts/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon
+    xmlns:android="http://schemas.android.com/apk/res/android">
+  <background android:drawable="@drawable/ic_launcher_background" />
+  <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

contacts/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon
+    xmlns:android="http://schemas.android.com/apk/res/android">
+  <background android:drawable="@drawable/ic_launcher_background" />
+  <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

contacts/app/src/main/res/values-night/themes.xml

@@ -0,0 +1,16 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+  <!-- Base application theme. -->
+  <style name="Theme.ContactsTest" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+    <!-- Primary brand color. -->
+    <item name="colorPrimary">@color/purple_200</item>
+    <item name="colorPrimaryVariant">@color/purple_700</item>
+    <item name="colorOnPrimary">@color/black</item>
+    <!-- Secondary brand color. -->
+    <item name="colorSecondary">@color/teal_200</item>
+    <item name="colorSecondaryVariant">@color/teal_200</item>
+    <item name="colorOnSecondary">@color/black</item>
+    <!-- Status bar color. -->
+    <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
+    <!-- Customize your theme here. -->
+  </style>
+</resources>

contacts/app/src/main/res/values/colors.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+  <color name="purple_200">#FFBB86FC</color>
+  <color name="purple_500">#FF6200EE</color>
+  <color name="purple_700">#FF3700B3</color>
+  <color name="teal_200">#FF03DAC5</color>
+  <color name="teal_700">#FF018786</color>
+  <color name="black">#FF000000</color>
+  <color name="white">#FFFFFFFF</color>
+</resources>

contacts/app/src/main/res/values/strings.xml

@@ -0,0 +1,3 @@
+<resources>
+  <string name="app_name">ContactsTest</string>
+</resources>

contacts/app/src/main/res/values/themes.xml

@@ -0,0 +1,16 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+  <!-- Base application theme. -->
+  <style name="Theme.ContactsTest" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+    <!-- Primary brand color. -->
+    <item name="colorPrimary">@color/purple_500</item>
+    <item name="colorPrimaryVariant">@color/purple_700</item>
+    <item name="colorOnPrimary">@color/white</item>
+    <!-- Secondary brand color. -->
+    <item name="colorSecondary">@color/teal_200</item>
+    <item name="colorSecondaryVariant">@color/teal_700</item>
+    <item name="colorOnSecondary">@color/black</item>
+    <!-- Status bar color. -->
+    <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
+    <!-- Customize your theme here. -->
+  </style>
+</resources>

contacts/app/src/main/res/xml/authenticator.xml

@@ -0,0 +1,6 @@
+<account-authenticator xmlns:android="http://schemas.android.com/apk/res/android"
+                       android:accountType="org.signal.contactstest"
+                       android:icon="@mipmap/ic_launcher"
+                       android:smallIcon="@mipmap/ic_launcher"
+                       android:label="@string/app_name"/>
+