Update dependencies

app/build.gradle

@@ -2,7 +2,6 @@ apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android-extensions'
 apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-kapt'
-apply plugin: 'io.fabric'
 apply plugin: 'jacoco'
 
 def keystoreProperties = new Properties()
@@ -34,6 +33,9 @@ android {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
     defaultConfig {
         applicationId "com.wbrawner.simplemarkdown"
         minSdkVersion 21
@@ -75,7 +77,7 @@ android {
 
 dependencies {
     testImplementation 'junit:junit:4.12'
-    testImplementation 'org.robolectric:robolectric:4.2'
+    testImplementation 'org.robolectric:robolectric:4.2.1'
     implementation fileTree(include: ['*.jar'], dir: 'libs')
     def espresso_version = '3.2.0'
     androidTestImplementation "androidx.test.espresso:espresso-core:$espresso_version"
@@ -88,13 +90,14 @@ dependencies {
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test.uiautomator:uiautomator:2.2.0'
     implementation 'androidx.appcompat:appcompat:1.1.0'
-    implementation 'androidx.preference:preference:1.1.0'
+    implementation 'androidx.preference:preference:1.1.1'
+    implementation "androidx.fragment:fragment-ktx:1.2.4"
     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
     implementation 'com.google.android.material:material:1.1.0'
     implementation 'androidx.legacy:legacy-support-v13:1.0.0'
     implementation 'com.commonsware.cwac:anddown:0.3.0'
-    implementation 'com.google.firebase:firebase-core:17.2.3'
-    implementation 'com.android.billingclient:billing:2.1.0'
+    implementation 'com.google.firebase:firebase-core:17.3.0'
+    implementation 'com.android.billingclient:billing:2.2.0'
     implementation 'com.crashlytics.sdk.android:crashlytics:2.10.1'
     implementation "androidx.core:core-ktx:1.2.0"
     implementation 'androidx.browser:browser:1.2.0'

app/src/main/java/com/wbrawner/simplemarkdown/view/activity/MainActivity.kt

@@ -13,12 +13,12 @@ import android.view.MenuItem
 import android.view.View
 import android.webkit.MimeTypeMap
 import android.widget.Toast
+import androidx.activity.viewModels
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.app.ActivityCompat
 import androidx.core.content.ContextCompat
 import androidx.lifecycle.Observer
-import androidx.lifecycle.ViewModelProviders
 import androidx.preference.PreferenceManager
 import com.wbrawner.simplemarkdown.R
 import com.wbrawner.simplemarkdown.utility.hideKeyboard
@@ -34,7 +34,7 @@ class MainActivity : AppCompatActivity(), ActivityCompat.OnRequestPermissionsRes
 
     private var shouldAutoSave = true
     override val coroutineContext: CoroutineContext = Dispatchers.Main
-    private lateinit var viewModel: MarkdownViewModel
+    private val viewModel: MarkdownViewModel by viewModels()
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -49,7 +49,6 @@ class MainActivity : AppCompatActivity(), ActivityCompat.OnRequestPermissionsRes
                             or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                     )
         }
-        viewModel = ViewModelProviders.of(this).get(MarkdownViewModel::class.java)
         val adapter = EditPagerAdapter(supportFragmentManager, this@MainActivity)
         pager.adapter = adapter
         pager.addOnPageChangeListener(adapter)
@@ -60,7 +59,7 @@ class MainActivity : AppCompatActivity(), ActivityCompat.OnRequestPermissionsRes
             tabLayout!!.visibility = View.GONE
         }
         @Suppress("CAST_NEVER_SUCCEEDS")
-        viewModel.fileName.observe(this, Observer<String> {
+        viewModel.fileName.observe(this, Observer {
             title = it
         })
         intent?.data?.let {

app/src/main/java/com/wbrawner/simplemarkdown/view/activity/MarkdownInfoActivity.kt

@@ -11,7 +11,10 @@ import com.wbrawner.simplemarkdown.R
 import com.wbrawner.simplemarkdown.utility.readAssetToString
 import com.wbrawner.simplemarkdown.utility.toHtml
 import kotlinx.android.synthetic.main.activity_markdown_info.*
-import kotlinx.coroutines.*
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
 import kotlin.coroutines.CoroutineContext
 
 class MarkdownInfoActivity : AppCompatActivity(), CoroutineScope {
@@ -57,9 +60,7 @@ class MarkdownInfoActivity : AppCompatActivity(), CoroutineScope {
     }
 
     override fun onDestroy() {
-        coroutineContext[Job]?.let {
-            cancel()
-        }
+        coroutineContext[Job]?.cancel()
         super.onDestroy()
     }
 

app/src/main/java/com/wbrawner/simplemarkdown/view/fragment/EditFragment.kt

@@ -16,8 +16,8 @@ import android.widget.EditText
 import android.widget.ScrollView
 import android.widget.TextView
 import androidx.fragment.app.Fragment
+import androidx.fragment.app.activityViewModels
 import androidx.lifecycle.Observer
-import androidx.lifecycle.ViewModelProviders
 import androidx.preference.PreferenceManager
 import com.wbrawner.simplemarkdown.R
 import com.wbrawner.simplemarkdown.model.Readability
@@ -32,7 +32,7 @@ import kotlin.math.abs
 class EditFragment : Fragment(), ViewPagerPage, CoroutineScope {
     private var markdownEditor: EditText? = null
     private var markdownEditorScroller: ScrollView? = null
-    lateinit var viewModel: MarkdownViewModel
+    private val viewModel: MarkdownViewModel by activityViewModels()
     override val coroutineContext: CoroutineContext = Dispatchers.Main
     private var readabilityWatcher: TextWatcher? = null
 
@@ -44,9 +44,6 @@ class EditFragment : Fragment(), ViewPagerPage, CoroutineScope {
     @SuppressLint("ClickableViewAccessibility")
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
-        activity?.let {
-            viewModel = ViewModelProviders.of(it).get(MarkdownViewModel::class.java)
-        } ?: return
         markdownEditor = view.findViewById(R.id.markdown_edit)
         markdownEditorScroller = view.findViewById(R.id.markdown_edit_container)
         markdownEditor?.addTextChangedListener(object : TextWatcher {
@@ -97,7 +94,7 @@ class EditFragment : Fragment(), ViewPagerPage, CoroutineScope {
             }
             false
         }
-        viewModel.originalMarkdown.observe(this, Observer<String> {
+        viewModel.originalMarkdown.observe(viewLifecycleOwner, Observer {
             markdownEditor?.setText(it)
         })
         launch {

app/src/main/java/com/wbrawner/simplemarkdown/view/fragment/PreviewFragment.kt

@@ -9,8 +9,8 @@ import android.view.ViewGroup
 import android.webkit.WebView
 import androidx.appcompat.app.AppCompatDelegate
 import androidx.fragment.app.Fragment
+import androidx.fragment.app.activityViewModels
 import androidx.lifecycle.Observer
-import androidx.lifecycle.ViewModelProviders
 import androidx.preference.PreferenceManager
 import com.wbrawner.simplemarkdown.BuildConfig
 import com.wbrawner.simplemarkdown.R
@@ -21,7 +21,7 @@ import kotlin.coroutines.CoroutineContext
 
 class PreviewFragment : Fragment(), CoroutineScope {
     override val coroutineContext: CoroutineContext = Dispatchers.Main
-    lateinit var viewModel: MarkdownViewModel
+    private val viewModel: MarkdownViewModel by activityViewModels()
     private var markdownPreview: WebView? = null
     private var style: String = ""
 
@@ -34,13 +34,10 @@ class PreviewFragment : Fragment(), CoroutineScope {
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         markdownPreview = view.findViewById(R.id.markdown_view)
         WebView.setWebContentsDebuggingEnabled(BuildConfig.DEBUG)
-        activity?.let {
-            viewModel = ViewModelProviders.of(it).get(MarkdownViewModel::class.java)
-        } ?: return
         launch {
             val isNightMode = AppCompatDelegate.getDefaultNightMode() ==
                     AppCompatDelegate.MODE_NIGHT_YES
-                    || context!!.resources.configuration.uiMode and UI_MODE_NIGHT_MASK == UI_MODE_NIGHT_YES
+                    || requireContext().resources.configuration.uiMode and UI_MODE_NIGHT_MASK == UI_MODE_NIGHT_YES
             val defaultCssId = if (isNightMode) {
                 R.string.pref_custom_css_default_dark
             } else {
@@ -61,7 +58,7 @@ class PreviewFragment : Fragment(), CoroutineScope {
             }
             style = String.format(FORMAT_CSS, css ?: "")
             updateWebContent(viewModel.markdownUpdates.value ?: "")
-            viewModel.markdownUpdates.observe(this@PreviewFragment, Observer<String> {
+            viewModel.markdownUpdates.observe(viewLifecycleOwner, Observer {
                 updateWebContent(it)
             })
         }

build.gradle

@@ -1,18 +1,14 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.3.61'
+    ext.kotlin_version = '1.3.72'
     repositories {
         jcenter()
         google()
-        maven {
-            url 'https://maven.fabric.io/public'
-        }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.6.1'
+        classpath 'com.android.tools.build:gradle:3.6.3'
         classpath 'com.google.gms:google-services:4.3.3'
-        classpath 'io.fabric.tools:gradle:1.31.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }