diff --git a/Habitica/res/layout/drawer_main.xml b/Habitica/res/layout/drawer_main.xml
index 71781f269..cd264616a 100644
--- a/Habitica/res/layout/drawer_main.xml
+++ b/Habitica/res/layout/drawer_main.xml
@@ -87,7 +87,7 @@
             <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                 android:layout_width="35dp"
                 android:layout_height="match_parent"
-                android:layout_marginLeft="16dp">
+                android:layout_marginLeft="8dp">
                 <ImageButton
                     android:id="@+id/settingsButton"
                     android:layout_width="wrap_content"
diff --git a/Habitica/res/layout/fragment_group_info.xml b/Habitica/res/layout/fragment_group_info.xml
index 3840d5a48..24837d5d0 100644
--- a/Habitica/res/layout/fragment_group_info.xml
+++ b/Habitica/res/layout/fragment_group_info.xml
@@ -102,6 +102,7 @@
                         android:text="@string/join_party_title"
                         android:gravity="center"/>
                     <TextView
+                        android:id="@+id/join_party_description_textview"
                         android:layout_width="match_parent"
                         android:layout_height="wrap_content"
                         style="@style/Body1"
@@ -109,62 +110,16 @@
                         android:textColor="@color/gray_300"
                         android:gravity="center"/>
 
-                    <TextView
-                        android:id="@+id/userIdView"
+                    <Button
+                        android:id="@+id/username_textview"
                         android:layout_width="match_parent"
                         android:layout_height="wrap_content"
                         android:textColor="@color/brand_400"
+                        style="@style/HabiticaButton.Gray.600"
                         android:gravity="center"
                         android:layout_marginTop="@dimen/spacing_large"
                         android:layout_marginBottom="@dimen/spacing_large"/>
-                    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-                        android:orientation="vertical"
-                        android:id="@+id/qrLayout"
-                        android:layout_width="match_parent"
-                        android:layout_height="wrap_content">
-                        <FrameLayout
-                            android:orientation="vertical"
-                            android:layout_width="fill_parent"
-                            android:layout_height="300dp"
-                            android:id="@+id/qrCodeWrapper">
 
-                            <com.facebook.drawee.view.SimpleDraweeView
-                                android:layout_width="wrap_content"
-                                android:layout_height="match_parent"
-                                android:id="@+id/QRImageView"
-                                android:layout_gravity="center" />
-
-                            <RelativeLayout
-                                android:orientation="vertical"
-                                android:layout_width="60dp"
-                                android:layout_height="60dp"
-                                android:layout_gravity="center"
-                                android:background="@color/white"
-                                android:clipChildren="true"
-                                android:padding="1dp"
-                                android:visibility="gone"
-                                >
-                                <com.habitrpg.android.habitica.ui.AvatarView
-                                    android:id="@+id/avatarView"
-                                    android:layout_width="wrap_content"
-                                    android:layout_height="wrap_content"
-                                    android:layout_centerHorizontal="true"
-                                    android:layout_centerVertical="true"
-                                    />
-                            </RelativeLayout>
-                        </FrameLayout>
-
-                        <Button
-                            android:id="@+id/QRDownloadButton"
-                            android:layout_width="wrap_content"
-                            android:layout_height="wrap_content"
-                            android:text="@string/download"
-                            style="@style/HabiticaButton.Gray.600"
-                            android:layout_marginTop="20dp"
-                            android:layout_gravity="center_horizontal|bottom"
-                            />
-
-                    </LinearLayout>
                 </LinearLayout>
             </LinearLayout>
 
diff --git a/Habitica/res/layout/fragment_party_invite.xml b/Habitica/res/layout/fragment_party_invite.xml
index 9104bc5da..b178867f4 100644
--- a/Habitica/res/layout/fragment_party_invite.xml
+++ b/Habitica/res/layout/fragment_party_invite.xml
@@ -29,15 +29,5 @@
         android:layout_gravity="right"
         android:text="@string/add_invites"
         android:layout_margin="@dimen/row_padding" />
-
-    <Button
-        android:id="@+id/InviteByQR"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="Scan a QR Code"
-        style="@style/Widget.AppCompat.Button.Colored"
-        android:layout_margin="20dp"
-        android:layout_gravity="center_horizontal|bottom"
-        />
 </LinearLayout>
 </ScrollView>
\ No newline at end of file
diff --git a/Habitica/res/layout/fragment_viewpager.xml b/Habitica/res/layout/fragment_viewpager.xml
index e8ad1e423..57070376f 100644
--- a/Habitica/res/layout/fragment_viewpager.xml
+++ b/Habitica/res/layout/fragment_viewpager.xml
@@ -2,4 +2,5 @@
 <android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:background="@color/white"
     android:id="@+id/viewPager" />
\ No newline at end of file
diff --git a/Habitica/res/layout/preference_child_summary_error.xml b/Habitica/res/layout/preference_child_summary_error.xml
index 54fe852e3..12fe83e29 100644
--- a/Habitica/res/layout/preference_child_summary_error.xml
+++ b/Habitica/res/layout/preference_child_summary_error.xml
@@ -19,7 +19,7 @@
         android:layout_weight="1" >
 
         <TextView
-            android:id="@+android:id/title"
+            android:id="@+id/title"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:ellipsize="marquee"
@@ -30,7 +30,7 @@
             tools:text="Title"/>
 
         <TextView
-            android:id="@+android:id/summary"
+            android:id="@+id/summary"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_alignLeft="@android:id/title"
diff --git a/Habitica/res/values/strings.xml b/Habitica/res/values/strings.xml
index a44d48abb..0c23e4e0f 100644
--- a/Habitica/res/values/strings.xml
+++ b/Habitica/res/values/strings.xml
@@ -381,6 +381,7 @@
     <string name="send">Send</string>
     <string name="invite">Invite Friends</string>
     <string name="invite_id_description">If you have friends already using Habitica, invite them by User ID here.</string>
+    <string name="invite_username_description">If you have friends already using Habitica, invite them by username here.</string>
     <string name="invite_email_description">If a friend joins Habitica via your email, they\'ll automatically be invited to your party!</string>
     <string name="add_invites">Add Invites</string>
     <string name="user_id">User ID</string>
@@ -760,7 +761,8 @@
     <string name="active_world_boss">Active World Boss</string>
     <string name="no_party_description">Take on quests with friends or on your own. Battle monsters, create Challenges, and help yourself stay accountable through Parties.</string>
     <string name="no_party_title">Play Habitica in a Party</string>
-    <string name="join_party_description">Give them your User ID or have them scan your QR code while inviting</string>
+    <string name="join_party_description">Give a Party member the username found below and they can send you an invite</string>
+    <string name="join_party_description_id">Give them your User ID or have them scan your QR code while inviting</string>
     <string name="join_party_title">Want to join a party?</string>
     <string name="create_party_website">Open website to create party</string>
     <string name="id_copied">ID copied to clipboard</string>
@@ -827,4 +829,5 @@
     <string name="username_confirmed">Username Confirmed</string>
     <string name="username_level">%s ・Lvl %d</string>
     <string name="enter_recipient_username">Enter a Recipient\'s username</string>
+    <string name="username_copied">Username copied to clipboard</string>
 </resources>
diff --git a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/activities/FullProfileActivity.kt b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/activities/FullProfileActivity.kt
index df9ff85fe..2e1300c05 100644
--- a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/activities/FullProfileActivity.kt
+++ b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/activities/FullProfileActivity.kt
@@ -192,12 +192,12 @@ class FullProfileActivity : BaseActivity() {
         user.authentication?.timestamps?.lastLoggedIn.notNull { lastLoginView.text = dateFormatter.format(it) }
         totalCheckinsView.text = user.loginIncentives.toString()
 
-        usernameText.text = userId
+        usernameText.text = user.username
         copyUsernameButton.visibility = View.VISIBLE
         copyUsernameButton.setOnClickListener { view ->
             val clipboard = view.context
                     .getSystemService(Context.CLIPBOARD_SERVICE) as? android.content.ClipboardManager
-            val clip = android.content.ClipData.newPlainText(userId, userId)
+            val clip = android.content.ClipData.newPlainText(user.username, user.username)
             clipboard?.primaryClip = clip
         }
 
diff --git a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/adapter/inventory/HabiticaClassArrayAdapter.kt b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/adapter/inventory/HabiticaClassArrayAdapter.kt
index ba96c7176..50a0e70bf 100644
--- a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/adapter/inventory/HabiticaClassArrayAdapter.kt
+++ b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/adapter/inventory/HabiticaClassArrayAdapter.kt
@@ -13,7 +13,7 @@ import com.habitrpg.android.habitica.models.user.Stats
 import com.habitrpg.android.habitica.ui.views.HabiticaIconsHelper
 
 
-class HabiticaClassArrayAdapter(context: Context?, resource: Int, objects: List<CharSequence>?) : ArrayAdapter<CharSequence>(context, resource, R.id.textView, objects) {
+class HabiticaClassArrayAdapter(context: Context, resource: Int, objects: List<CharSequence>) : ArrayAdapter<CharSequence>(context, resource, R.id.textView, objects) {
 
     override fun getDropDownView(position: Int, convertView: View?, parent: ViewGroup?): View =
             createView(position, convertView ?: parent?.inflate(R.layout.class_spinner_dropdown_item, false))
diff --git a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/adapter/inventory/ShopRecyclerAdapter.kt b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/adapter/inventory/ShopRecyclerAdapter.kt
index ddfca51d3..1913e0eef 100644
--- a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/adapter/inventory/ShopRecyclerAdapter.kt
+++ b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/adapter/inventory/ShopRecyclerAdapter.kt
@@ -116,19 +116,21 @@ class ShopRecyclerAdapter : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
                     val sectionHolder = holder as? SectionViewHolder ?: return
                     sectionHolder.bind(category?.text ?: "")
                     if (gearCategories.contains(category)) {
-                        val adapter = HabiticaClassArrayAdapter(context, R.layout.class_spinner_dropdown_item, gearCategories.map { it.identifier })
-                        sectionHolder.spinnerAdapter = adapter
-                        sectionHolder.selectedItem = gearCategories.indexOf(category)
-                        sectionHolder.spinnerSelectionChanged = {
-                            if (selectedGearCategory != gearCategories[holder.selectedItem].identifier) {
-                                selectedGearCategory = gearCategories[holder.selectedItem].identifier
+                        context.notNull {context ->
+                            val adapter = HabiticaClassArrayAdapter(context, R.layout.class_spinner_dropdown_item, gearCategories.map { it.identifier })
+                            sectionHolder.spinnerAdapter = adapter
+                            sectionHolder.selectedItem = gearCategories.indexOf(category)
+                            sectionHolder.spinnerSelectionChanged = {
+                                if (selectedGearCategory != gearCategories[holder.selectedItem].identifier) {
+                                    selectedGearCategory = gearCategories[holder.selectedItem].identifier
+                                }
+                            }
+                            if (user?.stats?.habitClass != category?.identifier) {
+                                sectionHolder.notesView?.text = context.getString(R.string.class_gear_disclaimer)
+                                sectionHolder.notesView?.visibility = View.VISIBLE
+                            } else {
+                                sectionHolder.notesView?.visibility = View.GONE
                             }
-                        }
-                        if (user?.stats?.habitClass != category?.identifier) {
-                            sectionHolder.notesView?.text = context?.getString(R.string.class_gear_disclaimer)
-                            sectionHolder.notesView?.visibility = View.VISIBLE
-                        } else {
-                            sectionHolder.notesView?.visibility = View.GONE
                         }
                     } else {
                         sectionHolder.spinnerAdapter = null
@@ -136,7 +138,7 @@ class ShopRecyclerAdapter : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
                     }
                 }
                 ShopItem::class.java -> {
-                    val item = obj as ShopItem
+                    val item = obj as? ShopItem ?: return
                     val itemHolder = holder as? ShopItemViewHolder ?: return
                     itemHolder.bind(item, item.canAfford(user))
                     if (ownedItems.containsKey(item.key+"-"+item.pinType)) {
diff --git a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/inventory/items/ItemRecyclerFragment.kt b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/inventory/items/ItemRecyclerFragment.kt
index d0424fcfd..415d8be00 100644
--- a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/inventory/items/ItemRecyclerFragment.kt
+++ b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/inventory/items/ItemRecyclerFragment.kt
@@ -176,11 +176,11 @@ class ItemRecyclerFragment : BaseFragment() {
             "special" -> SpecialItem::class.java
             else -> Egg::class.java
         }
-        inventoryRepository.getOwnedItems(itemClass, user).firstElement().subscribe(Consumer { items ->
+        compositeSubscription.add(inventoryRepository.getOwnedItems(itemClass, user).firstElement().subscribe(Consumer { items ->
             if (items.size > 0) {
                 adapter?.updateData(items as OrderedRealmCollection<Item>)
             }
-        }, RxErrorHandler.handleEmptyError())
+        }, RxErrorHandler.handleEmptyError()))
 
         compositeSubscription.add(inventoryRepository.getOwnedPets().subscribe(Consumer { adapter?.setOwnedPets(it) }, RxErrorHandler.handleEmptyError()))
     }
diff --git a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/preferences/BasePreferencesFragment.kt b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/preferences/BasePreferencesFragment.kt
index 98c14ac77..f794272ca 100644
--- a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/preferences/BasePreferencesFragment.kt
+++ b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/preferences/BasePreferencesFragment.kt
@@ -26,9 +26,9 @@ abstract class BasePreferencesFragment : PreferenceFragmentCompat() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
-        userRepository.getUser(userId).subscribe(Consumer<User> {
+        compositeSubscription.add(userRepository.getUser(userId).subscribe(Consumer<User> {
             this.user = it
-        }, RxErrorHandler.handleEmptyError())
+        }, RxErrorHandler.handleEmptyError()))
     }
 
     override fun onDestroy() {
diff --git a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/social/GroupInformationFragment.kt b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/social/GroupInformationFragment.kt
index 0428df06a..2802b6174 100644
--- a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/social/GroupInformationFragment.kt
+++ b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/social/GroupInformationFragment.kt
@@ -13,7 +13,6 @@ import com.habitrpg.android.habitica.R
 import com.habitrpg.android.habitica.components.AppComponent
 import com.habitrpg.android.habitica.data.SocialRepository
 import com.habitrpg.android.habitica.data.UserRepository
-import com.habitrpg.android.habitica.helpers.QrCodeManager
 import com.habitrpg.android.habitica.helpers.RxErrorHandler
 import com.habitrpg.android.habitica.models.invitations.PartyInvite
 import com.habitrpg.android.habitica.models.members.Member
@@ -62,11 +61,6 @@ class GroupInformationFragment : BaseFragment() {
 
         updateGroup(group)
 
-        if (this.group == null) {
-            val qrCodeManager = QrCodeManager(userRepository, this.context)
-            qrCodeManager.setUpView(qrLayout)
-        }
-
         buttonPartyInviteAccept.setOnClickListener { _ ->
             val userId = user?.invitations?.party?.id
             if (userId != null) {
@@ -87,13 +81,13 @@ class GroupInformationFragment : BaseFragment() {
             }
         }
 
-        userIdView.setOnClickListener { _ ->
+        username_textview.setOnClickListener { _ ->
             val clipboard = context?.getSystemService(Context.CLIPBOARD_SERVICE) as? ClipboardManager
-            val clip = ClipData.newPlainText(context?.getString(R.string.user_id), user?.id)
+            val clip = ClipData.newPlainText(context?.getString(R.string.username), user?.username)
             clipboard?.primaryClip = clip
             val activity = activity as? MainActivity
             if (activity != null) {
-                HabiticaSnackbar.showSnackbar(activity.floatingMenuWrapper, getString(R.string.id_copied), HabiticaSnackbar.SnackbarDisplayType.NORMAL)
+                HabiticaSnackbar.showSnackbar(activity.floatingMenuWrapper, getString(R.string.username_copied), HabiticaSnackbar.SnackbarDisplayType.NORMAL)
             }
         }
 
@@ -105,14 +99,14 @@ class GroupInformationFragment : BaseFragment() {
 
     private fun refresh() {
         if (group != null) {
-            socialRepository.retrieveGroup(group?.id ?: "").subscribe(Consumer {}, RxErrorHandler.handleEmptyError())
+            compositeSubscription.add(socialRepository.retrieveGroup(group?.id ?: "").subscribe(Consumer {}, RxErrorHandler.handleEmptyError()))
         } else {
-            userRepository.retrieveUser(false, forced = true)
+            compositeSubscription.add(userRepository.retrieveUser(false, forced = true)
                     .filter { it.hasParty() }
                     .flatMap { socialRepository.retrieveGroup("party") }
                     .flatMap<List<Member>> { group1 -> socialRepository.retrieveGroupMembers(group1.id, true) }
                     .doOnComplete { refreshLayout.isRefreshing = false }
-                    .subscribe(Consumer {  }, RxErrorHandler.handleEmptyError())
+                    .subscribe(Consumer {  }, RxErrorHandler.handleEmptyError()))
         }
     }
 
@@ -122,7 +116,7 @@ class GroupInformationFragment : BaseFragment() {
         } else {
             setInvitation(null)
         }
-        userIdView.text = user?.id
+        username_textview.text = user?.formattedUsername
     }
 
     private fun setInvitation(invitation: PartyInvite?) {
diff --git a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/social/TavernDetailFragment.kt b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/social/TavernDetailFragment.kt
index 9e0e2e2b9..cf2aeb175 100644
--- a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/social/TavernDetailFragment.kt
+++ b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/social/TavernDetailFragment.kt
@@ -155,21 +155,21 @@ class TavernDetailFragment : BaseFragment() {
 
     private fun addPlayerTiers() {
         for (tier in PlayerTier.getTiers()) {
-            val container = FrameLayout(context)
             context.notNull {
+                val container = FrameLayout(it)
                 container.backgroundCompat = ContextCompat.getDrawable(it, R.drawable.layout_rounded_bg_gray_700)
+                val label = UsernameLabel(context, null)
+                label.tier = tier.id
+                label.username = tier.title
+                val params = FrameLayout.LayoutParams(
+                        FrameLayout.LayoutParams.WRAP_CONTENT,
+                        FrameLayout.LayoutParams.WRAP_CONTENT,
+                        Gravity.CENTER)
+                container.addView(label, params)
+                playerTiersView.addView(container)
+                val padding = context?.resources?.getDimension(R.dimen.spacing_medium)?.toInt() ?: 0
+                container.setPadding(0, padding, 0, padding)
             }
-            val label = UsernameLabel(context, null)
-            label.tier = tier.id
-            label.username = tier.title
-            val params = FrameLayout.LayoutParams(
-                    FrameLayout.LayoutParams.WRAP_CONTENT,
-                    FrameLayout.LayoutParams.WRAP_CONTENT,
-                    Gravity.CENTER)
-            container.addView(label, params)
-            playerTiersView.addView(container)
-            val padding = context?.resources?.getDimension(R.dimen.spacing_medium)?.toInt() ?: 0
-            container.setPadding(0, padding, 0, padding)
         }
         playerTiersView.invalidate()
     }
diff --git a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/social/party/PartyFragment.kt b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/social/party/PartyFragment.kt
index 3d805034d..fb74f331c 100644
--- a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/social/party/PartyFragment.kt
+++ b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/social/party/PartyFragment.kt
@@ -71,9 +71,9 @@ class PartyFragment : BaseMainFragment() {
 
         // Get the full group data
         if (userHasParty()) {
-            socialRepository.retrieveGroup("party")
+            compositeSubscription.add(socialRepository.retrieveGroup("party")
                     .flatMap { group1 -> socialRepository.retrieveGroupMembers(group1.id, true) }
-                    .subscribe(Consumer { }, RxErrorHandler.handleEmptyError())
+                    .subscribe(Consumer { }, RxErrorHandler.handleEmptyError()))
         }
 
         setViewPagerAdapter()
diff --git a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/social/party/PartyInviteFragment.kt b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/social/party/PartyInviteFragment.kt
index 0ed23b467..daaa51ae5 100644
--- a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/social/party/PartyInviteFragment.kt
+++ b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/social/party/PartyInviteFragment.kt
@@ -11,20 +11,24 @@ import android.widget.LinearLayout
 import android.widget.TextView
 import com.habitrpg.android.habitica.R
 import com.habitrpg.android.habitica.components.AppComponent
+import com.habitrpg.android.habitica.helpers.RemoteConfigManager
 import com.habitrpg.android.habitica.prefs.scanner.IntentIntegrator
 import com.habitrpg.android.habitica.ui.fragments.BaseFragment
 import com.habitrpg.android.habitica.ui.helpers.bindView
 import com.habitrpg.android.habitica.ui.helpers.resetViews
 import java.util.*
+import javax.inject.Inject
 
 class PartyInviteFragment : BaseFragment() {
 
+    @Inject
+    lateinit var configManager: RemoteConfigManager
+
     var isEmailInvite: Boolean = false
 
     private val inviteDescription: TextView? by bindView(R.id.inviteDescription)
     private val invitationWrapper: LinearLayout? by bindView(R.id.invitationWrapper)
     private val addInviteButton: Button? by bindView(R.id.addInviteButton)
-    private val inviteQRButton: Button? by bindView(R.id.InviteByQR)
 
     val values: Array<String>
         get() {
@@ -50,6 +54,8 @@ class PartyInviteFragment : BaseFragment() {
 
         if (isEmailInvite) {
             inviteDescription?.text = getString(R.string.invite_email_description)
+        } else if (configManager.enableUsernameRelease()) {
+            inviteDescription?.text = getString(R.string.invite_username_description)
         } else {
             inviteDescription?.text = getString(R.string.invite_id_description)
         }
@@ -57,7 +63,6 @@ class PartyInviteFragment : BaseFragment() {
         addInviteField()
 
         addInviteButton?.setOnClickListener { addInviteField() }
-        inviteQRButton?.setOnClickListener { startQRInvite() }
     }
 
     override fun injectFragment(component: AppComponent) {
@@ -70,14 +75,11 @@ class PartyInviteFragment : BaseFragment() {
         if (isEmailInvite) {
             editText.setHint(R.string.email)
             editText.inputType = InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS
+        } else if (configManager.enableUsernameRelease()) {
+            editText.setHint(R.string.username)
         } else {
             editText.setHint(R.string.user_id)
         }
         invitationWrapper?.addView(editText)
     }
-
-    private fun startQRInvite() {
-        val scanIntegrator = IntentIntegrator(activity)
-        scanIntegrator.initiateScan()
-    }
 }
diff --git a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/views/HabiticaSnackbar.kt b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/views/HabiticaSnackbar.kt
index cb74865a7..9fb59212b 100644
--- a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/views/HabiticaSnackbar.kt
+++ b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/views/HabiticaSnackbar.kt
@@ -77,8 +77,8 @@ private constructor(parent: ViewGroup, content: View, callback: ContentViewCallb
 
     private fun setSpecialView(specialView: View?): HabiticaSnackbar {
         if (specialView != null) {
-            val snackbarView = view.findViewById<View>(R.id.content_container) as LinearLayout
-            snackbarView.addView(specialView)
+            val snackbarView = view.findViewById<View>(R.id.content_container) as? LinearLayout
+            snackbarView?.addView(specialView)
         }
         return this
     }
diff --git a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/views/ValueBar.kt b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/views/ValueBar.kt
index 5f0d5e7aa..580fc0345 100644
--- a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/views/ValueBar.kt
+++ b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/views/ValueBar.kt
@@ -69,7 +69,7 @@ class ValueBar(context: Context, attrs: AttributeSet?) : FrameLayout(context, at
     init {
         View.inflate(context, R.layout.value_bar, this)
 
-        val attributes = context?.theme?.obtainStyledAttributes(
+        val attributes = context.theme?.obtainStyledAttributes(
                 attrs,
                 R.styleable.ValueBar,
                 0, 0)
diff --git a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/views/social/ChatBarView.kt b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/views/social/ChatBarView.kt
index f57fc75f6..31d385b73 100644
--- a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/views/social/ChatBarView.kt
+++ b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/views/social/ChatBarView.kt
@@ -21,7 +21,6 @@ import net.pherth.android.emoji_library.EmojiTextView
 
 class ChatBarView : FrameLayout {
 
-    private val chatBarContainer: LinearLayout by bindView(R.id.chatBarContainer)
     private val sendButton: ImageButton by bindView(R.id.sendButton)
     private val chatEditText: EmojiEditText by bindView(R.id.chatEditText)
     private val textIndicator: TextView by bindView(R.id.text_indicator)
diff --git a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/views/tasks/TaskFilterDialog.kt b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/views/tasks/TaskFilterDialog.kt
index 8250a99aa..f58283f96 100644
--- a/Habitica/src/main/java/com/habitrpg/android/habitica/ui/views/tasks/TaskFilterDialog.kt
+++ b/Habitica/src/main/java/com/habitrpg/android/habitica/ui/views/tasks/TaskFilterDialog.kt
@@ -103,9 +103,7 @@ class TaskFilterDialog(context: Context, component: AppComponent?) : AlertDialog
 
     override fun show() {
         super.show()
-        if (this.window != null) {
-            this.window.clearFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE or WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM)
-        }
+        this.window?.clearFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE or WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM)
     }
 
     fun setTags(tags: List<Tag>) {
@@ -174,9 +172,7 @@ class TaskFilterDialog(context: Context, component: AppComponent?) : AlertDialog
         tagsList.removeAllViews()
         createTagEditViews()
         tagsEditButton.setText(R.string.done)
-        if (this.window != null) {
-            this.window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE)
-        }
+        this.window?.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE)
     }
 
     private fun stopEditing() {
@@ -184,9 +180,7 @@ class TaskFilterDialog(context: Context, component: AppComponent?) : AlertDialog
         tagsList.removeAllViews()
         createTagViews()
         tagsEditButton.setText(R.string.edit_tag_btn_edit)
-        if (this.window != null) {
-            this.window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN)
-        }
+        this.window?.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN)
         repository.updateTags(editedTags.values).toObservable().flatMap { tags -> Observable.fromIterable(tags) }.subscribe(Consumer { tag -> editedTags.remove(tag.id) }, RxErrorHandler.handleEmptyError())
         repository.createTags(createdTags.values).toObservable().flatMap { tags -> Observable.fromIterable(tags) }.subscribe(Consumer { tag -> createdTags.remove(tag.getId()) }, RxErrorHandler.handleEmptyError())
         repository.deleteTags(deletedTags).subscribe(Consumer { deletedTags.clear() }, RxErrorHandler.handleEmptyError())
@@ -202,10 +196,10 @@ class TaskFilterDialog(context: Context, component: AppComponent?) : AlertDialog
     }
 
     private fun createTagEditView(inflater: LayoutInflater, index: Int, tag: Tag) {
-        val wrapper = inflater.inflate(R.layout.edit_tag_item, tagsList, false) as LinearLayout
-        val tagEditText = wrapper.findViewById<View>(R.id.edit_text) as EditText
-        tagEditText.setText(tag.name)
-        tagEditText.addTextChangedListener(object : TextWatcher {
+        val wrapper = inflater.inflate(R.layout.edit_tag_item, tagsList, false) as? LinearLayout
+        val tagEditText = wrapper?.findViewById<View>(R.id.edit_text) as? EditText
+        tagEditText?.setText(tag.name)
+        tagEditText?.addTextChangedListener(object : TextWatcher {
             override fun beforeTextChanged(s: CharSequence, start: Int, count: Int, after: Int) {
 
             }
@@ -228,7 +222,7 @@ class TaskFilterDialog(context: Context, component: AppComponent?) : AlertDialog
 
             }
         })
-        val deleteButton = wrapper.findViewById<View>(R.id.delete_button) as Button
+        val deleteButton = wrapper?.findViewById<View>(R.id.delete_button) as Button
         deleteButton.setOnClickListener {
             deletedTags.add(tag.getId())
             if (createdTags.containsKey(tag.getId())) {
@@ -250,12 +244,12 @@ class TaskFilterDialog(context: Context, component: AppComponent?) : AlertDialog
             this.activeTags = tagIds
         }
         for (index in 0 until tagsList.childCount - 1) {
-            (tagsList.getChildAt(index) as AppCompatCheckBox).isChecked = false
+            (tagsList.getChildAt(index) as? AppCompatCheckBox)?.isChecked = false
         }
         for (tagId in this.activeTags) {
             val index = indexForId(tagId)
             if (index >= 0) {
-                (tagsList.getChildAt(index) as CheckBox).isChecked = true
+                (tagsList.getChildAt(index) as? CheckBox)?.isChecked = true
             }
         }
         filtersChanged()