diff --git a/.buildkite/pipeline.yml b/.buildkite/pipeline.yml
index a410ea0af9..31d2d1f457 100644
--- a/.buildkite/pipeline.yml
+++ b/.buildkite/pipeline.yml
@@ -81,7 +81,7 @@ steps:
 
   - label: "ktlint"
     command:
-      - "curl -sSLO https://github.com/pinterest/ktlint/releases/download/0.34.2/ktlint && chmod a+x ktlint"
+      - "curl -sSLO https://github.com/pinterest/ktlint/releases/download/0.36.0/ktlint && chmod a+x ktlint"
       - "./ktlint --android --experimental -v"
     plugins:
       - docker#v3.1.0:
diff --git a/CHANGES.md b/CHANGES.md
index 37ff98758b..33258e3b85 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -17,9 +17,10 @@ SDK API changes ⚠️:
  - 
 
 Build 🧱:
- -
+ - Upgrade ktlint to version 0.36.0
 
 Other changes:
+ - Restore availability to Chromebooks (#932)
  - Add a [documentation](./docs/integration_tests.md) to run integration tests
 
 Changes in RiotX 0.17.0 (2020-02-27)
diff --git a/vector/lint.xml b/vector/lint.xml
index 6a9b0634a7..3d3bb1856f 100644
--- a/vector/lint.xml
+++ b/vector/lint.xml
@@ -6,6 +6,11 @@
     <issue id="MissingTranslation" severity="warning" />
     <issue id="TypographyEllipsis" severity="error" />
     <issue id="ImpliedQuantity" severity="warning" />
+    <issue id="IconXmlAndPng" severity="error" />
+    <issue id="IconDipSize" severity="error" />
+    <issue id="IconDuplicatesConfig" severity="error" />
+    <issue id="IconDuplicates" severity="error" />
+    <issue id="IconExpectedSize" severity="error" />
 
     <!-- UX -->
     <issue id="ButtonOrder" severity="error" />
@@ -19,6 +24,7 @@
     <issue id="InefficientWeight" severity="error" />
     <issue id="DisableBaselineAlignment" severity="error" />
     <issue id="ScrollViewSize" severity="error" />
+    <issue id="NegativeMargin" severity="error" />
 
     <!-- RTL -->
     <issue id="RtlEnabled" severity="error" />
@@ -30,9 +36,14 @@
     <issue id="SetTextI18n" severity="error" />
     <issue id="ViewConstructor" severity="error" />
     <issue id="UseValueOf" severity="error" />
+    <issue id="Recycle" severity="error" />
+    <issue id="KotlinPropertyAccess" severity="error" />
 
     <!-- Ignore error from HtmlCompressor lib -->
     <issue id="InvalidPackage">
-        <ignore path="**/htmlcompressor-1.4.jar"/>
+        <ignore path="**/htmlcompressor-1.4.jar" />
     </issue>
+
+    <!-- Manifest -->
+    <issue id="PermissionImpliesUnsupportedChromeOsHardware" severity="error" />
 </lint>
diff --git a/vector/src/main/AndroidManifest.xml b/vector/src/main/AndroidManifest.xml
index 488f357c4b..2e56e20ce7 100644
--- a/vector/src/main/AndroidManifest.xml
+++ b/vector/src/main/AndroidManifest.xml
@@ -9,6 +9,15 @@
     <uses-permission android:name="android.permission.VIBRATE" />
     <uses-permission android:name="android.permission.CAMERA" />
 
+    <!-- Adding CAMERA permission prevents Chromebooks to see the application on the PlayStore -->
+    <!-- Tell that the Camera is not mandatory to install the application -->
+    <uses-feature
+        android:name="android.hardware.camera"
+        android:required="false" />
+    <uses-feature
+        android:name="android.hardware.camera.autofocus"
+        android:required="false" />
+
     <application
         android:name=".VectorApplication"
         android:allowBackup="false"
diff --git a/vector/src/main/java/im/vector/riotx/core/hardware/HardwareInfo.kt b/vector/src/main/java/im/vector/riotx/core/hardware/HardwareInfo.kt
new file mode 100644
index 0000000000..1ce0dda025
--- /dev/null
+++ b/vector/src/main/java/im/vector/riotx/core/hardware/HardwareInfo.kt
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2020 New Vector Ltd
+ *
+ * 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
+ *
+ *     http://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.
+ */
+
+@file:Suppress("DEPRECATION")
+
+package im.vector.riotx.core.hardware
+
+import android.content.Context
+import android.hardware.Camera
+import android.hardware.camera2.CameraCharacteristics
+import android.hardware.camera2.CameraManager
+import android.os.Build
+import javax.inject.Inject
+
+class HardwareInfo @Inject constructor(
+        private val context: Context
+) {
+    /**
+     * Tell if the device has a back (or external) camera
+     */
+    fun hasBackCamera(): Boolean {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
+            return Camera.getNumberOfCameras() > 0
+        }
+
+        val manager = context.getSystemService(Context.CAMERA_SERVICE) as CameraManager? ?: return Camera.getNumberOfCameras() > 0
+
+        return manager.cameraIdList.any {
+            val lensFacing = manager.getCameraCharacteristics(it).get(CameraCharacteristics.LENS_FACING)
+            lensFacing == CameraCharacteristics.LENS_FACING_BACK || lensFacing == CameraCharacteristics.LENS_FACING_EXTERNAL
+        }
+    }
+}
diff --git a/vector/src/main/java/im/vector/riotx/core/platform/BadgeFloatingActionButton.kt b/vector/src/main/java/im/vector/riotx/core/platform/BadgeFloatingActionButton.kt
index ebf04e7097..49931e2b54 100644
--- a/vector/src/main/java/im/vector/riotx/core/platform/BadgeFloatingActionButton.kt
+++ b/vector/src/main/java/im/vector/riotx/core/platform/BadgeFloatingActionButton.kt
@@ -129,7 +129,7 @@ class BadgeFloatingActionButton @JvmOverloads constructor(
         attrs?.let { initAttrs(attrs) }
     }
 
-    @SuppressWarnings("ResourceType", "Recycle")
+    @SuppressWarnings("Recycle")
     private fun initAttrs(attrs: AttributeSet) {
         context.obtainStyledAttributes(attrs, R.styleable.BadgeFloatingActionButton).use {
             counterBackgroundColor = it.getColor(R.styleable.BadgeFloatingActionButton_badgeBackgroundColor, 0)
diff --git a/vector/src/main/java/im/vector/riotx/features/crypto/verification/Config.kt b/vector/src/main/java/im/vector/riotx/features/crypto/verification/Config.kt
deleted file mode 100644
index 80f2b1153a..0000000000
--- a/vector/src/main/java/im/vector/riotx/features/crypto/verification/Config.kt
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- * Copyright 2020 New Vector Ltd
- *
- * 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
- *
- *     http://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.
- */
-
-package im.vector.riotx.features.crypto.verification
-
-import im.vector.matrix.android.api.session.crypto.verification.VerificationMethod
-
-val supportedVerificationMethods =
-        listOf(
-                // RiotX supports SAS verification
-                VerificationMethod.SAS,
-                // RiotX is able to show QR codes
-                VerificationMethod.QR_CODE_SHOW,
-                // RiotX is able to scan QR codes
-                VerificationMethod.QR_CODE_SCAN
-        )
diff --git a/vector/src/main/java/im/vector/riotx/features/crypto/verification/SupportedVerificationMethodsProvider.kt b/vector/src/main/java/im/vector/riotx/features/crypto/verification/SupportedVerificationMethodsProvider.kt
new file mode 100644
index 0000000000..e7ed123de6
--- /dev/null
+++ b/vector/src/main/java/im/vector/riotx/features/crypto/verification/SupportedVerificationMethodsProvider.kt
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2020 New Vector Ltd
+ *
+ * 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
+ *
+ *     http://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.
+ */
+
+package im.vector.riotx.features.crypto.verification
+
+import im.vector.matrix.android.api.session.crypto.verification.VerificationMethod
+import im.vector.riotx.core.hardware.HardwareInfo
+import timber.log.Timber
+import javax.inject.Inject
+
+class SupportedVerificationMethodsProvider @Inject constructor(
+        private val hardwareInfo: HardwareInfo
+) {
+    /**
+     * Provide the list of supported method by RiotX, with or without the QR_CODE_SCAN, depending if a back camera
+     * is available
+     */
+    fun provide(): List<VerificationMethod> {
+        return mutableListOf(
+                // RiotX supports SAS verification
+                VerificationMethod.SAS,
+                // RiotX is able to show QR codes
+                VerificationMethod.QR_CODE_SHOW)
+                .apply {
+                    if (hardwareInfo.hasBackCamera()) {
+                        // RiotX is able to scan QR codes, and a Camera is available
+                        add(VerificationMethod.QR_CODE_SCAN)
+                    } else {
+                        // This quite uncommon
+                        Timber.w("No back Camera detected")
+                    }
+                }
+    }
+}
diff --git a/vector/src/main/java/im/vector/riotx/features/crypto/verification/VerificationBottomSheetViewModel.kt b/vector/src/main/java/im/vector/riotx/features/crypto/verification/VerificationBottomSheetViewModel.kt
index f4670b90e1..d161f6d6fc 100644
--- a/vector/src/main/java/im/vector/riotx/features/crypto/verification/VerificationBottomSheetViewModel.kt
+++ b/vector/src/main/java/im/vector/riotx/features/crypto/verification/VerificationBottomSheetViewModel.kt
@@ -63,9 +63,11 @@ data class VerificationBottomSheetViewState(
         val isMe: Boolean = false
 ) : MvRxState
 
-class VerificationBottomSheetViewModel @AssistedInject constructor(@Assisted initialState: VerificationBottomSheetViewState,
-                                                                   @Assisted args: VerificationBottomSheet.VerificationArgs,
-                                                                   private val session: Session)
+class VerificationBottomSheetViewModel @AssistedInject constructor(
+        @Assisted initialState: VerificationBottomSheetViewState,
+        @Assisted args: VerificationBottomSheet.VerificationArgs,
+        private val session: Session,
+        private val supportedVerificationMethodsProvider: SupportedVerificationMethodsProvider)
     : VectorViewModel<VerificationBottomSheetViewState, VerificationAction, VerificationBottomSheetViewEvents>(initialState),
         VerificationService.Listener {
 
@@ -116,9 +118,11 @@ class VerificationBottomSheetViewModel @AssistedInject constructor(@Assisted ini
         if (autoReady) {
             // TODO, can I be here in DM mode? in this case should test if roomID is null?
             session.cryptoService().verificationService()
-                    .readyPendingVerification(supportedVerificationMethods,
+                    .readyPendingVerification(
+                            supportedVerificationMethodsProvider.provide(),
                             pr!!.otherUserId,
-                            pr.transactionId ?: "")
+                            pr.transactionId ?: ""
+                    )
         }
     }
 
@@ -173,7 +177,12 @@ class VerificationBottomSheetViewModel @AssistedInject constructor(@Assisted ini
                                                 session
                                                         .cryptoService()
                                                         .verificationService()
-                                                        .requestKeyVerificationInDMs(supportedVerificationMethods, otherUserId, data, pendingLocalId)
+                                                        .requestKeyVerificationInDMs(
+                                                                supportedVerificationMethodsProvider.provide(),
+                                                                otherUserId,
+                                                                data,
+                                                                pendingLocalId
+                                                        )
                                         )
                                 )
                             }
@@ -191,7 +200,7 @@ class VerificationBottomSheetViewModel @AssistedInject constructor(@Assisted ini
                                 pendingRequest = Success(session
                                         .cryptoService()
                                         .verificationService()
-                                        .requestKeyVerificationInDMs(supportedVerificationMethods, otherUserId, roomId)
+                                        .requestKeyVerificationInDMs(supportedVerificationMethodsProvider.provide(), otherUserId, roomId)
                                 )
                         )
                     }
@@ -294,8 +303,6 @@ class VerificationBottomSheetViewModel @AssistedInject constructor(@Assisted ini
                 } catch (failure: Throwable) {
                     _viewEvents.post(VerificationBottomSheetViewEvents.ModalError(failure.localizedMessage))
                 }
-
-                Unit
             }
         }.exhaustive
     }
@@ -362,9 +369,11 @@ class VerificationBottomSheetViewModel @AssistedInject constructor(@Assisted ini
                     // auto ready in this case, as we are waiting
                     // TODO, can I be here in DM mode? in this case should test if roomID is null?
                     session.cryptoService().verificationService()
-                            .readyPendingVerification(supportedVerificationMethods,
+                            .readyPendingVerification(
+                                    supportedVerificationMethodsProvider.provide(),
                                     pr.otherUserId,
-                                    pr.transactionId ?: "")
+                                    pr.transactionId ?: ""
+                            )
                 }
 
                 // Use this one!
diff --git a/vector/src/main/java/im/vector/riotx/features/home/room/detail/RoomDetailViewModel.kt b/vector/src/main/java/im/vector/riotx/features/home/room/detail/RoomDetailViewModel.kt
index 1fcae90e95..4ab9125c4f 100644
--- a/vector/src/main/java/im/vector/riotx/features/home/room/detail/RoomDetailViewModel.kt
+++ b/vector/src/main/java/im/vector/riotx/features/home/room/detail/RoomDetailViewModel.kt
@@ -65,7 +65,7 @@ import im.vector.riotx.core.resources.UserPreferencesProvider
 import im.vector.riotx.core.utils.subscribeLogError
 import im.vector.riotx.features.command.CommandParser
 import im.vector.riotx.features.command.ParsedCommand
-import im.vector.riotx.features.crypto.verification.supportedVerificationMethods
+import im.vector.riotx.features.crypto.verification.SupportedVerificationMethodsProvider
 import im.vector.riotx.features.home.room.detail.composer.rainbow.RainbowGenerator
 import im.vector.riotx.features.home.room.detail.timeline.helper.TimelineDisplayableEvents
 import im.vector.riotx.features.home.room.typing.TypingHelper
@@ -81,13 +81,15 @@ import java.io.File
 import java.util.concurrent.TimeUnit
 import java.util.concurrent.atomic.AtomicBoolean
 
-class RoomDetailViewModel @AssistedInject constructor(@Assisted initialState: RoomDetailViewState,
-                                                      userPreferencesProvider: UserPreferencesProvider,
-                                                      private val vectorPreferences: VectorPreferences,
-                                                      private val stringProvider: StringProvider,
-                                                      private val typingHelper: TypingHelper,
-                                                      private val rainbowGenerator: RainbowGenerator,
-                                                      private val session: Session
+class RoomDetailViewModel @AssistedInject constructor(
+        @Assisted initialState: RoomDetailViewState,
+        userPreferencesProvider: UserPreferencesProvider,
+        private val vectorPreferences: VectorPreferences,
+        private val stringProvider: StringProvider,
+        private val typingHelper: TypingHelper,
+        private val rainbowGenerator: RainbowGenerator,
+        private val session: Session,
+        private val supportedVerificationMethodsProvider: SupportedVerificationMethodsProvider
 ) : VectorViewModel<RoomDetailViewState, RoomDetailAction, RoomDetailViewEvents>(initialState), Timeline.Listener {
 
     private val room = session.getRoom(initialState.roomId)!!
@@ -427,7 +429,7 @@ class RoomDetailViewModel @AssistedInject constructor(@Assisted initialState: Ro
                             session
                                     .cryptoService()
                                     .verificationService()
-                                    .requestKeyVerificationInDMs(supportedVerificationMethods, slashCommandResult.userId, room.roomId)
+                                    .requestKeyVerificationInDMs(supportedVerificationMethodsProvider.provide(), slashCommandResult.userId, room.roomId)
                             _viewEvents.post(RoomDetailViewEvents.SlashCommandHandled())
                             popDraft()
                         }
@@ -834,7 +836,7 @@ class RoomDetailViewModel @AssistedInject constructor(@Assisted initialState: Ro
     private fun handleAcceptVerification(action: RoomDetailAction.AcceptVerificationRequest) {
         Timber.v("## SAS handleAcceptVerification ${action.otherUserId},  roomId:${room.roomId}, txId:${action.transactionId}")
         if (session.cryptoService().verificationService().readyPendingVerificationInDMs(
-                        supportedVerificationMethods,
+                        supportedVerificationMethodsProvider.provide(),
                         action.otherUserId,
                         room.roomId,
                         action.transactionId)) {
diff --git a/vector/src/main/java/im/vector/riotx/features/home/room/detail/timeline/item/PollResultLineView.kt b/vector/src/main/java/im/vector/riotx/features/home/room/detail/timeline/item/PollResultLineView.kt
index f1e1753b17..a0ad3466f7 100644
--- a/vector/src/main/java/im/vector/riotx/features/home/room/detail/timeline/item/PollResultLineView.kt
+++ b/vector/src/main/java/im/vector/riotx/features/home/room/detail/timeline/item/PollResultLineView.kt
@@ -73,11 +73,11 @@ class PollResultLineView @JvmOverloads constructor(
         orientation = HORIZONTAL
         ButterKnife.bind(this)
 
-        val typedArray = context.obtainStyledAttributes(attrs,
-                R.styleable.PollResultLineView, 0, 0)
+        val typedArray = context.obtainStyledAttributes(attrs, R.styleable.PollResultLineView, 0, 0)
         label = typedArray.getString(R.styleable.PollResultLineView_optionName) ?: ""
         percent = typedArray.getString(R.styleable.PollResultLineView_optionCount) ?: ""
         optionSelected = typedArray.getBoolean(R.styleable.PollResultLineView_optionSelected, false)
         isWinner = typedArray.getBoolean(R.styleable.PollResultLineView_optionIsWinner, false)
+        typedArray.recycle()
     }
 }
diff --git a/vector/src/main/java/im/vector/riotx/features/navigation/DefaultNavigator.kt b/vector/src/main/java/im/vector/riotx/features/navigation/DefaultNavigator.kt
index 63fab290be..a080cabf1b 100644
--- a/vector/src/main/java/im/vector/riotx/features/navigation/DefaultNavigator.kt
+++ b/vector/src/main/java/im/vector/riotx/features/navigation/DefaultNavigator.kt
@@ -24,7 +24,6 @@ import androidx.core.app.ActivityOptionsCompat
 import androidx.core.app.TaskStackBuilder
 import androidx.core.view.ViewCompat
 import im.vector.matrix.android.api.session.crypto.verification.IncomingSasVerificationTransaction
-import im.vector.matrix.android.api.session.crypto.verification.VerificationMethod
 import im.vector.matrix.android.api.session.room.model.roomdirectory.PublicRoom
 import im.vector.matrix.android.api.util.MatrixItem
 import im.vector.riotx.R
@@ -35,6 +34,7 @@ import im.vector.riotx.core.utils.toast
 import im.vector.riotx.features.createdirect.CreateDirectRoomActivity
 import im.vector.riotx.features.crypto.keysbackup.settings.KeysBackupManageActivity
 import im.vector.riotx.features.crypto.keysbackup.setup.KeysBackupSetupActivity
+import im.vector.riotx.features.crypto.verification.SupportedVerificationMethodsProvider
 import im.vector.riotx.features.crypto.verification.VerificationBottomSheet
 import im.vector.riotx.features.debug.DebugMenuActivity
 import im.vector.riotx.features.home.room.detail.RoomDetailActivity
@@ -56,7 +56,8 @@ import javax.inject.Singleton
 @Singleton
 class DefaultNavigator @Inject constructor(
         private val sessionHolder: ActiveSessionHolder,
-        private val vectorPreferences: VectorPreferences
+        private val vectorPreferences: VectorPreferences,
+        private val supportedVerificationMethodsProvider: SupportedVerificationMethodsProvider
 ) : Navigator {
 
     override fun openRoom(context: Context, roomId: String, eventId: String?, buildTask: Boolean) {
@@ -85,9 +86,10 @@ class DefaultNavigator @Inject constructor(
     override fun requestSessionVerification(context: Context) {
         val session = sessionHolder.getSafeActiveSession() ?: return
         val pr = session.cryptoService().verificationService().requestKeyVerification(
-                listOf(VerificationMethod.SAS, VerificationMethod.QR_CODE_SCAN, VerificationMethod.QR_CODE_SHOW),
+                supportedVerificationMethodsProvider.provide(),
                 session.myUserId,
-                session.cryptoService().getUserDevices(session.myUserId).map { it.deviceId })
+                session.cryptoService().getUserDevices(session.myUserId).map { it.deviceId }
+        )
         if (context is VectorBaseActivity) {
             VerificationBottomSheet.withArgs(
                     roomId = null,
diff --git a/vector/src/main/java/im/vector/riotx/features/settings/devices/DevicesViewModel.kt b/vector/src/main/java/im/vector/riotx/features/settings/devices/DevicesViewModel.kt
index ce6e388af6..79a5fe84aa 100644
--- a/vector/src/main/java/im/vector/riotx/features/settings/devices/DevicesViewModel.kt
+++ b/vector/src/main/java/im/vector/riotx/features/settings/devices/DevicesViewModel.kt
@@ -40,7 +40,7 @@ import im.vector.matrix.android.internal.crypto.model.rest.DeviceInfo
 import im.vector.matrix.android.internal.crypto.model.rest.DevicesListResponse
 import im.vector.matrix.rx.rx
 import im.vector.riotx.core.platform.VectorViewModel
-import im.vector.riotx.features.crypto.verification.supportedVerificationMethods
+import im.vector.riotx.features.crypto.verification.SupportedVerificationMethodsProvider
 
 data class DevicesViewState(
         val myDeviceId: String = "",
@@ -50,8 +50,10 @@ data class DevicesViewState(
         val request: Async<Unit> = Uninitialized
 ) : MvRxState
 
-class DevicesViewModel @AssistedInject constructor(@Assisted initialState: DevicesViewState,
-                                                   private val session: Session)
+class DevicesViewModel @AssistedInject constructor(
+        @Assisted initialState: DevicesViewState,
+        private val session: Session,
+        private val supportedVerificationMethodsProvider: SupportedVerificationMethodsProvider)
     : VectorViewModel<DevicesViewState, DevicesAction, DevicesViewEvents>(initialState), VerificationService.Listener {
 
     @AssistedInject.Factory
@@ -172,7 +174,9 @@ class DevicesViewModel @AssistedInject constructor(@Assisted initialState: Devic
     }
 
     private fun handleVerify(action: DevicesAction.VerifyMyDevice) {
-        val txID = session.cryptoService().verificationService().requestKeyVerification(supportedVerificationMethods, session.myUserId, listOf(action.deviceId))
+        val txID = session.cryptoService()
+                .verificationService()
+                .requestKeyVerification(supportedVerificationMethodsProvider.provide(), session.myUserId, listOf(action.deviceId))
         _viewEvents.post(DevicesViewEvents.ShowVerifyDevice(
                 session.myUserId,
                 txID.transactionId
diff --git a/vector/src/main/res/drawable-hdpi/ic_person_black_24dp.png b/vector/src/main/res/drawable-hdpi/ic_person_black_24dp.png
deleted file mode 100644
index 6fbcc6d425..0000000000
Binary files a/vector/src/main/res/drawable-hdpi/ic_person_black_24dp.png and /dev/null differ
diff --git a/vector/src/main/res/drawable-mdpi/ic_material_camera.png b/vector/src/main/res/drawable-mdpi/ic_material_camera.png
deleted file mode 100755
index 78e5bb23ff..0000000000
Binary files a/vector/src/main/res/drawable-mdpi/ic_material_camera.png and /dev/null differ
diff --git a/vector/src/main/res/drawable-mdpi/ic_material_file.png b/vector/src/main/res/drawable-mdpi/ic_material_file.png
deleted file mode 100755
index 64561dd4a4..0000000000
Binary files a/vector/src/main/res/drawable-mdpi/ic_material_file.png and /dev/null differ
diff --git a/vector/src/main/res/drawable-mdpi/ic_material_videocam.png b/vector/src/main/res/drawable-mdpi/ic_material_videocam.png
deleted file mode 100755
index 3153a9b6d4..0000000000
Binary files a/vector/src/main/res/drawable-mdpi/ic_material_videocam.png and /dev/null differ
diff --git a/vector/src/main/res/drawable-mdpi/ic_person_black_24dp.png b/vector/src/main/res/drawable-mdpi/ic_person_black_24dp.png
deleted file mode 100644
index 57da32af18..0000000000
Binary files a/vector/src/main/res/drawable-mdpi/ic_person_black_24dp.png and /dev/null differ
diff --git a/vector/src/main/res/drawable-mdpi/ic_send_sticker.png b/vector/src/main/res/drawable-mdpi/ic_send_sticker.png
deleted file mode 100644
index a369cbee49..0000000000
Binary files a/vector/src/main/res/drawable-mdpi/ic_send_sticker.png and /dev/null differ
diff --git a/vector/src/main/res/drawable-mdpi/vector_cancel_upload_download.png b/vector/src/main/res/drawable-mdpi/vector_cancel_upload_download.png
deleted file mode 100755
index 51b4401ca0..0000000000
Binary files a/vector/src/main/res/drawable-mdpi/vector_cancel_upload_download.png and /dev/null differ
diff --git a/vector/src/main/res/drawable-mdpi/vector_micro_green.png b/vector/src/main/res/drawable-mdpi/vector_micro_green.png
deleted file mode 100755
index 15114b7e71..0000000000
Binary files a/vector/src/main/res/drawable-mdpi/vector_micro_green.png and /dev/null differ
diff --git a/vector/src/main/res/drawable-mdpi/video_call_black.png b/vector/src/main/res/drawable-mdpi/video_call_black.png
deleted file mode 100755
index 0039e804eb..0000000000
Binary files a/vector/src/main/res/drawable-mdpi/video_call_black.png and /dev/null differ
diff --git a/vector/src/main/res/drawable-mdpi/video_call_green.png b/vector/src/main/res/drawable-mdpi/video_call_green.png
deleted file mode 100755
index 028ec1e3e3..0000000000
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diff --git a/vector/src/main/res/drawable-mdpi/voice_call_black.png b/vector/src/main/res/drawable-mdpi/voice_call_black.png
deleted file mode 100755
index 7c9d1b09c5..0000000000
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diff --git a/vector/src/main/res/drawable-mdpi/voice_call_end_fushia.png b/vector/src/main/res/drawable-mdpi/voice_call_end_fushia.png
deleted file mode 100755
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diff --git a/vector/src/main/res/drawable-mdpi/voice_call_green.png b/vector/src/main/res/drawable-mdpi/voice_call_green.png
deleted file mode 100755
index 7afa5cd118..0000000000
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diff --git a/vector/src/main/res/drawable-mdpi/voice_call_start_green.png b/vector/src/main/res/drawable-mdpi/voice_call_start_green.png
deleted file mode 100755
index b11532ef5a..0000000000
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diff --git a/vector/src/main/res/drawable-xhdpi/ic_person_black_24dp.png b/vector/src/main/res/drawable-xhdpi/ic_person_black_24dp.png
deleted file mode 100644
index 360a32f27c..0000000000
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diff --git a/vector/src/main/res/drawable-xhdpi/ic_send_sticker.png b/vector/src/main/res/drawable-xhdpi/ic_send_sticker.png
deleted file mode 100644
index c17d04e498..0000000000
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diff --git a/vector/src/main/res/drawable-xxhdpi/ic_devices_info.png b/vector/src/main/res/drawable-xxhdpi/ic_devices_info.png
deleted file mode 100755
index 0ac10c8f33..0000000000
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diff --git a/vector/src/main/res/drawable-xxhdpi/ic_material_camera.png b/vector/src/main/res/drawable-xxhdpi/ic_material_camera.png
deleted file mode 100755
index 78e5bb23ff..0000000000
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diff --git a/vector/src/main/res/drawable-xxhdpi/ic_material_file.png b/vector/src/main/res/drawable-xxhdpi/ic_material_file.png
deleted file mode 100755
index 64561dd4a4..0000000000
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diff --git a/vector/src/main/res/drawable-xxhdpi/ic_material_message_black.png b/vector/src/main/res/drawable-xxhdpi/ic_material_message_black.png
deleted file mode 100644
index 0d989b2bcd..0000000000
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diff --git a/vector/src/main/res/drawable-xxhdpi/ic_material_message_grey.png b/vector/src/main/res/drawable-xxhdpi/ic_material_message_grey.png
deleted file mode 100644
index 92a1da89f6..0000000000
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diff --git a/vector/src/main/res/drawable-xxhdpi/ic_material_share.png b/vector/src/main/res/drawable-xxhdpi/ic_material_share.png
deleted file mode 100755
index 0fe15fc056..0000000000
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diff --git a/vector/src/main/res/drawable-xxhdpi/ic_material_videocam.png b/vector/src/main/res/drawable-xxhdpi/ic_material_videocam.png
deleted file mode 100755
index 3153a9b6d4..0000000000
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diff --git a/vector/src/main/res/drawable-xxhdpi/ic_perm_device_information_black.png b/vector/src/main/res/drawable-xxhdpi/ic_perm_device_information_black.png
deleted file mode 100755
index 0ac10c8f33..0000000000
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diff --git a/vector/src/main/res/drawable-xxhdpi/ic_person_black.png b/vector/src/main/res/drawable-xxhdpi/ic_person_black.png
deleted file mode 100755
index f1e148490b..0000000000
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diff --git a/vector/src/main/res/drawable-xxhdpi/ic_person_black_24dp.png b/vector/src/main/res/drawable-xxhdpi/ic_person_black_24dp.png
deleted file mode 100644
index f1e148490b..0000000000
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diff --git a/vector/src/main/res/drawable-xxhdpi/ic_send_sticker.png b/vector/src/main/res/drawable-xxhdpi/ic_send_sticker.png
deleted file mode 100644
index a369cbee49..0000000000
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diff --git a/vector/src/main/res/drawable-xxhdpi/vector_cancel_upload_download.png b/vector/src/main/res/drawable-xxhdpi/vector_cancel_upload_download.png
deleted file mode 100755
index 51b4401ca0..0000000000
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diff --git a/vector/src/main/res/drawable-xxhdpi/vector_close_widget.png b/vector/src/main/res/drawable-xxhdpi/vector_close_widget.png
deleted file mode 100755
index 51b4401ca0..0000000000
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diff --git a/vector/src/main/res/drawable-xxhdpi/vector_create_direct_room.png b/vector/src/main/res/drawable-xxhdpi/vector_create_direct_room.png
deleted file mode 100755
index a5b2b57497..0000000000
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diff --git a/vector/src/main/res/drawable-xxhdpi/vector_creation_remove_user.png b/vector/src/main/res/drawable-xxhdpi/vector_creation_remove_user.png
deleted file mode 100755
index 51b4401ca0..0000000000
Binary files a/vector/src/main/res/drawable-xxhdpi/vector_creation_remove_user.png and /dev/null differ
diff --git a/vector/src/main/res/drawable-xxhdpi/vector_leave_room_black.png b/vector/src/main/res/drawable-xxhdpi/vector_leave_room_black.png
deleted file mode 100755
index 51b4401ca0..0000000000
Binary files a/vector/src/main/res/drawable-xxhdpi/vector_leave_room_black.png and /dev/null differ
diff --git a/vector/src/main/res/drawable-xxhdpi/vector_micro_green.png b/vector/src/main/res/drawable-xxhdpi/vector_micro_green.png
deleted file mode 100755
index 15114b7e71..0000000000
Binary files a/vector/src/main/res/drawable-xxhdpi/vector_micro_green.png and /dev/null differ
diff --git a/vector/src/main/res/drawable-xxhdpi/video_call_black.png b/vector/src/main/res/drawable-xxhdpi/video_call_black.png
deleted file mode 100755
index 0039e804eb..0000000000
Binary files a/vector/src/main/res/drawable-xxhdpi/video_call_black.png and /dev/null differ
diff --git a/vector/src/main/res/drawable-xxhdpi/video_call_green.png b/vector/src/main/res/drawable-xxhdpi/video_call_green.png
deleted file mode 100755
index 028ec1e3e3..0000000000
Binary files a/vector/src/main/res/drawable-xxhdpi/video_call_green.png and /dev/null differ
diff --git a/vector/src/main/res/drawable-xxhdpi/voice_call_black.png b/vector/src/main/res/drawable-xxhdpi/voice_call_black.png
deleted file mode 100755
index 7c9d1b09c5..0000000000
Binary files a/vector/src/main/res/drawable-xxhdpi/voice_call_black.png and /dev/null differ
diff --git a/vector/src/main/res/drawable-xxhdpi/voice_call_end_fushia.png b/vector/src/main/res/drawable-xxhdpi/voice_call_end_fushia.png
deleted file mode 100755
index 814aa0017e..0000000000
Binary files a/vector/src/main/res/drawable-xxhdpi/voice_call_end_fushia.png and /dev/null differ
diff --git a/vector/src/main/res/drawable-xxhdpi/voice_call_green.png b/vector/src/main/res/drawable-xxhdpi/voice_call_green.png
deleted file mode 100755
index 7afa5cd118..0000000000
Binary files a/vector/src/main/res/drawable-xxhdpi/voice_call_green.png and /dev/null differ
diff --git a/vector/src/main/res/drawable-xxhdpi/voice_call_start_green.png b/vector/src/main/res/drawable-xxhdpi/voice_call_start_green.png
deleted file mode 100755
index b11532ef5a..0000000000
Binary files a/vector/src/main/res/drawable-xxhdpi/voice_call_start_green.png and /dev/null differ
diff --git a/vector/src/main/res/drawable-xxxhdpi/ic_person_black_24dp.png b/vector/src/main/res/drawable-xxxhdpi/ic_person_black_24dp.png
deleted file mode 100644
index 1ebc37be17..0000000000
Binary files a/vector/src/main/res/drawable-xxxhdpi/ic_person_black_24dp.png and /dev/null differ
diff --git a/vector/src/main/res/layout/vector_message_merge_avatar_list.xml b/vector/src/main/res/layout/vector_message_merge_avatar_list.xml
index 853dfc80d7..58f38ada0e 100644
--- a/vector/src/main/res/layout/vector_message_merge_avatar_list.xml
+++ b/vector/src/main/res/layout/vector_message_merge_avatar_list.xml
@@ -21,6 +21,7 @@
         android:layout_marginLeft="-5dp"
         android:adjustViewBounds="true"
         android:scaleType="centerCrop"
+        tools:ignore="NegativeMargin"
         tools:src="@tools:sample/avatars" />
 
     <ImageView
@@ -31,6 +32,7 @@
         android:layout_marginLeft="-5dp"
         android:adjustViewBounds="true"
         android:scaleType="centerCrop"
+        tools:ignore="NegativeMargin"
         tools:src="@tools:sample/avatars" />
 
     <ImageView
@@ -41,6 +43,7 @@
         android:layout_marginLeft="-5dp"
         android:adjustViewBounds="true"
         android:scaleType="centerCrop"
+        tools:ignore="NegativeMargin"
         tools:src="@tools:sample/avatars" />
 
     <ImageView
@@ -51,6 +54,7 @@
         android:layout_marginLeft="-5dp"
         android:adjustViewBounds="true"
         android:scaleType="centerCrop"
+        tools:ignore="NegativeMargin"
         tools:src="@tools:sample/avatars" />
 
 </LinearLayout>
\ No newline at end of file
diff --git a/vector/src/main/res/menu/vector_home_group_settings.xml b/vector/src/main/res/menu/vector_home_group_settings.xml
deleted file mode 100755
index e40c4b487f..0000000000
--- a/vector/src/main/res/menu/vector_home_group_settings.xml
+++ /dev/null
@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<menu xmlns:android="http://schemas.android.com/apk/res/android">
-    <item
-        android:id="@+id/ic_action_select_remove_group"
-        android:icon="@drawable/vector_leave_room_black"
-        android:title="@string/leave" />
-</menu>
\ No newline at end of file
diff --git a/vector/src/main/res/menu/vector_room.xml b/vector/src/main/res/menu/vector_room.xml
deleted file mode 100755
index bb84a3ff29..0000000000
--- a/vector/src/main/res/menu/vector_room.xml
+++ /dev/null
@@ -1,43 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<menu 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"
-    tools:context="org.matrix.vector.activity.RoomActivity">
-
-    <item
-        android:id="@+id/ic_action_search_in_room"
-        android:icon="@drawable/ic_material_search_white"
-        android:title="@string/room_menu_search"
-        app:showAsAction="always" />
-
-    <item
-        android:id="@+id/ic_action_matrix_apps"
-        android:icon="@drawable/apps_icon"
-        android:title="@string/room_add_matrix_apps"
-        app:showAsAction="collapseActionView" />
-
-    <item
-        android:id="@+id/ic_action_room_resend_unsent"
-        android:icon="@drawable/ic_material_send_black"
-        android:title="@string/room_resend_unsent_messages"
-        app:showAsAction="collapseActionView" />
-
-    <item
-        android:id="@+id/ic_action_room_delete_unsent"
-        android:icon="@drawable/ic_material_delete"
-        android:title="@string/room_delete_unsent_messages"
-        app:showAsAction="collapseActionView" />
-
-    <item
-        android:id="@+id/ic_action_room_settings"
-        android:icon="@drawable/ic_material_settings_small"
-        android:title="@string/room_details_title"
-        app:showAsAction="collapseActionView" />
-
-    <item
-        android:id="@+id/ic_action_room_leave"
-        android:icon="@drawable/vector_leave_room_black"
-        android:title="@string/leave"
-        app:showAsAction="collapseActionView" />
-
-</menu>
diff --git a/vector/src/main/res/menu/vector_searches.xml b/vector/src/main/res/menu/vector_searches.xml
deleted file mode 100755
index 542c433272..0000000000
--- a/vector/src/main/res/menu/vector_searches.xml
+++ /dev/null
@@ -1,18 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<menu 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"
-    tools:context="org.matrix.vector.activity.RoomActivity">
-
-    <item
-        android:id="@+id/ic_action_speak_to_search"
-        android:icon="@drawable/vector_micro_green"
-        android:title="@string/speak"
-        app:showAsAction="always" />
-
-    <item
-        android:id="@+id/ic_action_clear_search"
-        android:icon="@drawable/vector_clear_edittext_green"
-        android:title="@string/clear"
-        app:showAsAction="always" />
-</menu>