refactor: Migrate to AndroidX

This commit maps all existing dependency packages to their AndroidX
namespace equivalents. Redundant dependencies on v4 and v7 versions of
the support library have also been removed. BuildSrc module buildscript
has been modified to include additional required dependencies

app/build.gradle

@@ -14,7 +14,7 @@ android {
         targetSdkVersion Versions.targetSdkVersion
         versionCode Versions.versionCode
         versionName Versions.versionName
-        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables.useSupportLibrary = true
     }
     buildTypes {
@@ -41,10 +41,8 @@ configurations.all {
 dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
     implementation Dependencies.kotlin_stdlib
-    implementation Dependencies.appcompat_v7
     implementation Dependencies.design
     implementation Dependencies.constraint_layout
-    implementation Dependencies.support_v4
     kapt Dependencies.databinding
     testImplementation Dependencies.junit
     androidTestImplementation Dependencies.test_runner

app/src/androidTest/java/org/systers/mentorship/ExampleInstrumentedTest.kt

@@ -1,7 +1,7 @@
 package org.systers.mentorship
 
-import android.support.test.InstrumentationRegistry
-import android.support.test.runner.AndroidJUnit4
+import androidx.test.InstrumentationRegistry
+import androidx.test.runner.AndroidJUnit4
 
 import org.junit.Test
 import org.junit.runner.RunWith

app/src/androidTest/java/org/systers/mentorship/LoginActivityTest.kt

@@ -1,14 +1,14 @@
 package org.systers.mentorship
 
-import android.support.annotation.IdRes
-import android.support.design.widget.TextInputLayout
-import android.support.test.espresso.Espresso.onView
-import android.support.test.espresso.ViewInteraction
-import android.support.test.espresso.action.ViewActions.*
-import android.support.test.espresso.assertion.ViewAssertions.matches
-import android.support.test.espresso.matcher.ViewMatchers.*
-import android.support.test.rule.ActivityTestRule
-import android.support.test.runner.AndroidJUnit4
+import androidx.annotation.IdRes
+import com.google.android.material.textfield.TextInputLayout
+import androidx.test.espresso.Espresso.onView
+import androidx.test.espresso.ViewInteraction
+import androidx.test.espresso.action.ViewActions.*
+import androidx.test.espresso.assertion.ViewAssertions.matches
+import androidx.test.espresso.matcher.ViewMatchers.*
+import androidx.test.rule.ActivityTestRule
+import androidx.test.runner.AndroidJUnit4
 import android.view.View
 import android.widget.EditText
 import org.hamcrest.CoreMatchers.allOf

app/src/androidTest/java/org/systers/mentorship/SignUpActivityTest.kt

@@ -1,17 +1,17 @@
 package org.systers.mentorship
 
-import android.support.annotation.IdRes
-import android.support.design.widget.Snackbar
-import android.support.design.widget.TextInputLayout
-import android.support.test.espresso.Espresso
-import android.support.test.espresso.Espresso.onView
-import android.support.test.espresso.ViewInteraction
-import android.support.test.espresso.action.ViewActions.*
-import android.support.test.espresso.assertion.ViewAssertions.matches
-import android.support.test.espresso.matcher.ViewMatchers
-import android.support.test.espresso.matcher.ViewMatchers.*
-import android.support.test.rule.ActivityTestRule
-import android.support.test.runner.AndroidJUnit4
+import androidx.annotation.IdRes
+import com.google.android.material.snackbar.Snackbar
+import com.google.android.material.textfield.TextInputLayout
+import androidx.test.espresso.Espresso
+import androidx.test.espresso.Espresso.onView
+import androidx.test.espresso.ViewInteraction
+import androidx.test.espresso.action.ViewActions.*
+import androidx.test.espresso.assertion.ViewAssertions.matches
+import androidx.test.espresso.matcher.ViewMatchers
+import androidx.test.espresso.matcher.ViewMatchers.*
+import androidx.test.rule.ActivityTestRule
+import androidx.test.runner.AndroidJUnit4
 import android.view.View
 import android.widget.EditText
 import org.hamcrest.Description

app/src/main/java/org/systers/mentorship/MentorshipApplication.kt

@@ -2,7 +2,7 @@ package org.systers.mentorship
 
 import android.app.Application
 import android.content.Context
-import android.support.v7.app.AppCompatDelegate
+import androidx.appcompat.app.AppCompatDelegate
 
 /**
  * The entry point, a class that represents Mentorship application.

app/src/main/java/org/systers/mentorship/remote/CustomInterceptor.kt

@@ -1,6 +1,6 @@
 package org.systers.mentorship.remote
 
-import android.support.annotation.NonNull
+import androidx.annotation.NonNull
 import android.text.TextUtils
 import okhttp3.Interceptor
 import okhttp3.Response

app/src/main/java/org/systers/mentorship/utils/SingleLiveEvent.kt

@@ -1,10 +1,10 @@
 package org.systers.mentorship.utils
 
-import android.arch.lifecycle.LifecycleOwner
-import android.arch.lifecycle.MutableLiveData
-import android.arch.lifecycle.Observer
-import android.support.annotation.MainThread
 import android.util.Log
+import androidx.annotation.MainThread
+import androidx.lifecycle.LifecycleOwner
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.Observer
 import java.util.concurrent.atomic.AtomicBoolean
 
 
@@ -29,7 +29,7 @@ class SingleLiveEvent<T> : MutableLiveData<T>() {
     private val mPending = AtomicBoolean(false)
 
     @MainThread
-    override fun observe(owner: LifecycleOwner, observer: Observer<T>) {
+    override fun observe(owner: LifecycleOwner, observer: Observer<in T>) {
 
         if (hasActiveObservers()) {
             Log.w(TAG, "Multiple observers registered but only one will be notified of changes.")

app/src/main/java/org/systers/mentorship/view/activities/BaseActivity.kt

@@ -4,10 +4,10 @@ package org.systers.mentorship.view.activities
 
 import android.app.ProgressDialog
 import android.content.Context
-import android.support.v4.app.Fragment
-import android.support.v7.app.AppCompatActivity
+import androidx.appcompat.app.AppCompatActivity
 import android.view.View
 import android.view.inputmethod.InputMethodManager
+import androidx.fragment.app.Fragment
 import org.systers.mentorship.utils.ProgressBar
 
 /**

app/src/main/java/org/systers/mentorship/view/activities/LoginActivity.kt

@@ -1,10 +1,10 @@
 package org.systers.mentorship.view.activities
 
-import android.arch.lifecycle.Observer
-import android.arch.lifecycle.ViewModelProviders
+import androidx.lifecycle.Observer
+import androidx.lifecycle.ViewModelProviders
 import android.content.Intent
 import android.os.Bundle
-import android.support.design.widget.Snackbar
+import com.google.android.material.snackbar.Snackbar
 import android.view.inputmethod.EditorInfo
 import android.widget.Toast
 import kotlinx.android.synthetic.main.activity_login.*

app/src/main/java/org/systers/mentorship/view/activities/MainActivity.kt

@@ -3,7 +3,7 @@ package org.systers.mentorship.view.activities
 import android.content.Intent
 import android.os.Bundle
 import android.os.PersistableBundle
-import android.support.design.widget.BottomNavigationView
+import com.google.android.material.bottomnavigation.BottomNavigationView
 import android.view.Menu
 import android.view.MenuItem
 import kotlinx.android.synthetic.main.activity_main.*

app/src/main/java/org/systers/mentorship/view/activities/MemberProfileActivity.kt

@@ -1,10 +1,10 @@
 package org.systers.mentorship.view.activities
 
-import android.arch.lifecycle.Observer
-import android.arch.lifecycle.ViewModelProviders
+import androidx.lifecycle.Observer
+import androidx.lifecycle.ViewModelProviders
 import android.content.Intent
 import android.os.Bundle
-import android.support.design.widget.Snackbar
+import com.google.android.material.snackbar.Snackbar
 import android.view.MenuItem
 import kotlinx.android.synthetic.main.activity_member_profile.*
 import org.systers.mentorship.R

app/src/main/java/org/systers/mentorship/view/activities/RequestDetailActivity.kt

@@ -1,9 +1,9 @@
 package org.systers.mentorship.view.activities
 
-import android.arch.lifecycle.Observer
-import android.arch.lifecycle.ViewModelProviders
+import androidx.lifecycle.Observer
+import androidx.lifecycle.ViewModelProviders
 import android.os.Bundle
-import android.support.design.widget.Snackbar
+import com.google.android.material.snackbar.Snackbar
 import android.text.method.ScrollingMovementMethod
 import android.view.MenuItem
 import android.view.View

app/src/main/java/org/systers/mentorship/view/activities/SendRequestActivity.kt

@@ -1,10 +1,10 @@
 package org.systers.mentorship.view.activities
 
 import android.app.DatePickerDialog
-import android.arch.lifecycle.Observer
-import android.arch.lifecycle.ViewModelProviders
+import androidx.lifecycle.Observer
+import androidx.lifecycle.ViewModelProviders
 import android.os.Bundle
-import android.support.design.widget.Snackbar
+import com.google.android.material.snackbar.Snackbar
 import android.text.SpannableStringBuilder
 import android.text.TextUtils
 import android.view.MenuItem

app/src/main/java/org/systers/mentorship/view/activities/SettingsActivity.kt

@@ -2,7 +2,7 @@ package org.systers.mentorship.view.activities
 
 import android.content.Intent
 import android.os.Bundle
-import android.support.v7.app.AlertDialog
+import androidx.appcompat.app.AlertDialog
 import kotlinx.android.synthetic.main.activity_settings.*
 import org.systers.mentorship.R
 import org.systers.mentorship.utils.PreferenceManager

app/src/main/java/org/systers/mentorship/view/activities/SignUpActivity.kt

@@ -1,10 +1,10 @@
 package org.systers.mentorship.view.activities
 
-import android.arch.lifecycle.Observer
-import android.arch.lifecycle.ViewModelProviders
+import androidx.lifecycle.Observer
+import androidx.lifecycle.ViewModelProviders
 import android.content.Intent
 import android.os.Bundle
-import android.support.design.widget.Snackbar
+import com.google.android.material.snackbar.Snackbar
 import android.widget.Toast
 import kotlinx.android.synthetic.main.activity_sign_up.*
 import org.systers.mentorship.R

app/src/main/java/org/systers/mentorship/view/activities/SplashScreenActivity.kt

@@ -3,7 +3,7 @@ package org.systers.mentorship.view.activities
 import android.content.Intent
 import android.os.Bundle
 import android.os.Handler
-import android.support.v7.app.AppCompatActivity
+import androidx.appcompat.app.AppCompatActivity
 import org.systers.mentorship.R
 import org.systers.mentorship.utils.PreferenceManager
 

app/src/main/java/org/systers/mentorship/view/adapters/AchievementsAdapter.kt

@@ -1,11 +1,11 @@
 package org.systers.mentorship.view.adapters
 
-import android.support.v7.recyclerview.extensions.ListAdapter
-import android.support.v7.util.DiffUtil
-import android.support.v7.widget.RecyclerView
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.ListAdapter
+import androidx.recyclerview.widget.RecyclerView
 import kotlinx.android.synthetic.main.achievement_list_item.view.*
 import org.systers.mentorship.R
 import org.systers.mentorship.models.Task

app/src/main/java/org/systers/mentorship/view/adapters/MembersAdapter.kt

@@ -1,7 +1,7 @@
 package org.systers.mentorship.view.adapters
 
-import android.support.annotation.NonNull
-import android.support.v7.widget.RecyclerView
+import androidx.annotation.NonNull
+import androidx.recyclerview.widget.RecyclerView
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup

app/src/main/java/org/systers/mentorship/view/adapters/RelationPagerAdapter.kt

@@ -1,8 +1,8 @@
 package org.systers.mentorship.view.adapters
 
-import android.support.v4.app.Fragment
-import android.support.v4.app.FragmentManager
-import android.support.v4.app.FragmentPagerAdapter
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.FragmentManager
+import androidx.fragment.app.FragmentPagerAdapter
 import org.systers.mentorship.MentorshipApplication
 import org.systers.mentorship.R
 import org.systers.mentorship.view.fragments.RelationFragment

app/src/main/java/org/systers/mentorship/view/adapters/RequestsAdapter.kt

@@ -1,7 +1,7 @@
 package org.systers.mentorship.view.adapters
 
-import android.support.annotation.NonNull
-import android.support.v7.widget.RecyclerView
+import androidx.annotation.NonNull
+import androidx.recyclerview.widget.RecyclerView
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup

app/src/main/java/org/systers/mentorship/view/adapters/RequestsPagerAdapter.kt

@@ -1,8 +1,8 @@
 package org.systers.mentorship.view.adapters
 
-import android.support.v4.app.Fragment
-import android.support.v4.app.FragmentManager
-import android.support.v4.app.FragmentPagerAdapter
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.FragmentManager
+import androidx.fragment.app.FragmentPagerAdapter
 import org.systers.mentorship.MentorshipApplication
 import org.systers.mentorship.R
 import org.systers.mentorship.models.RelationState

app/src/main/java/org/systers/mentorship/view/adapters/TasksAdapter.kt

@@ -1,6 +1,6 @@
 package org.systers.mentorship.view.adapters
 
-import android.support.v7.widget.RecyclerView
+import androidx.recyclerview.widget.RecyclerView
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup

app/src/main/java/org/systers/mentorship/view/fragments/BaseFragment.kt

@@ -1,7 +1,7 @@
 package org.systers.mentorship.view.fragments
 
 import android.os.Bundle
-import android.support.v4.app.Fragment
+import androidx.fragment.app.Fragment
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup

app/src/main/java/org/systers/mentorship/view/fragments/ChangePasswordFragment.kt

@@ -1,11 +1,11 @@
 package org.systers.mentorship.view.fragments
 
 import android.app.Dialog
-import android.arch.lifecycle.Observer
-import android.arch.lifecycle.ViewModelProviders
+import androidx.lifecycle.Observer
+import androidx.lifecycle.ViewModelProviders
 import android.os.Bundle
-import android.support.v4.app.DialogFragment
-import android.support.v7.app.AlertDialog
+import androidx.fragment.app.DialogFragment
+import androidx.appcompat.app.AlertDialog
 import android.view.LayoutInflater
 import android.view.View
 import android.widget.Toast

app/src/main/java/org/systers/mentorship/view/fragments/EditProfileFragment.kt

@@ -2,17 +2,17 @@ package org.systers.mentorship.view.fragments
 
 
 import android.app.Dialog
-import android.arch.lifecycle.Observer
-import android.arch.lifecycle.ViewModelProviders
-import android.databinding.DataBindingUtil
+import androidx.lifecycle.Observer
+import androidx.lifecycle.ViewModelProviders
 import android.os.Bundle
-import android.support.v4.app.DialogFragment
-import android.support.v7.app.AlertDialog
+import androidx.fragment.app.DialogFragment
+import androidx.appcompat.app.AlertDialog
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.view.WindowManager
 import android.widget.Toast
+import androidx.databinding.DataBindingUtil
 import org.systers.mentorship.R
 import org.systers.mentorship.databinding.FragmentEditProfileBinding
 import org.systers.mentorship.models.User

app/src/main/java/org/systers/mentorship/view/fragments/HomeFragment.kt

@@ -1,15 +1,15 @@
 package org.systers.mentorship.view.fragments
 
-import android.arch.lifecycle.Observer
-import android.arch.lifecycle.ViewModelProviders
-import android.databinding.DataBindingUtil
 import android.os.Bundle
-import android.support.design.widget.Snackbar
-import android.support.v7.widget.DividerItemDecoration
-import android.support.v7.widget.LinearLayoutManager
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.databinding.DataBindingUtil
+import androidx.lifecycle.Observer
+import androidx.lifecycle.ViewModelProviders
+import androidx.recyclerview.widget.DividerItemDecoration
+import androidx.recyclerview.widget.LinearLayoutManager
+import com.google.android.material.snackbar.Snackbar
 import kotlinx.android.synthetic.main.fragment_home.*
 import org.systers.mentorship.R
 import org.systers.mentorship.databinding.FragmentHomeBinding

app/src/main/java/org/systers/mentorship/view/fragments/MembersFragment.kt

@@ -1,11 +1,11 @@
 package org.systers.mentorship.view.fragments
 
-import android.arch.lifecycle.Observer
-import android.arch.lifecycle.ViewModelProviders
+import androidx.lifecycle.Observer
+import androidx.lifecycle.ViewModelProviders
 import android.content.Intent
 import android.os.Bundle
-import android.support.design.widget.Snackbar
-import android.support.v7.widget.LinearLayoutManager
+import com.google.android.material.snackbar.Snackbar
+import androidx.recyclerview.widget.LinearLayoutManager
 import android.view.View
 import kotlinx.android.synthetic.main.fragment_members.*
 import org.systers.mentorship.R