Conversation tab bar animations.

app/src/main/java/org/thoughtcrime/securesms/stories/tabs/ConversationListTabsFragment.kt

@@ -1,10 +1,20 @@
 package org.thoughtcrime.securesms.stories.tabs
 
+import android.animation.Animator
+import android.animation.AnimatorSet
+import android.animation.ValueAnimator
 import android.os.Bundle
 import android.view.View
+import android.widget.ImageView
 import android.widget.TextView
+import androidx.core.content.ContextCompat
+import androidx.core.view.animation.PathInterpolatorCompat
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
+import com.airbnb.lottie.LottieAnimationView
+import com.airbnb.lottie.LottieProperty
+import com.airbnb.lottie.model.KeyPath
+import org.signal.core.util.DimensionUnit
 import org.thoughtcrime.securesms.R
 import org.thoughtcrime.securesms.util.visible
 import java.text.NumberFormat
@@ -18,14 +28,32 @@ class ConversationListTabsFragment : Fragment(R.layout.conversation_list_tabs) {
 
   private lateinit var chatsUnreadIndicator: TextView
   private lateinit var storiesUnreadIndicator: TextView
-  private lateinit var chatsIcon: View
-  private lateinit var storiesIcon: View
+  private lateinit var chatsIcon: LottieAnimationView
+  private lateinit var storiesIcon: LottieAnimationView
+  private lateinit var chatsPill: ImageView
+  private lateinit var storiesPill: ImageView
+
+  private var pillAnimator: Animator? = null
 
   override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
     chatsUnreadIndicator = view.findViewById(R.id.chats_unread_indicator)
     storiesUnreadIndicator = view.findViewById(R.id.stories_unread_indicator)
     chatsIcon = view.findViewById(R.id.chats_tab_icon)
     storiesIcon = view.findViewById(R.id.stories_tab_icon)
+    chatsPill = view.findViewById(R.id.chats_pill)
+    storiesPill = view.findViewById(R.id.stories_pill)
+
+    val iconTint = ContextCompat.getColor(requireContext(), R.color.signal_colorOnSecondaryContainer)
+
+    chatsIcon.addValueCallback(
+      KeyPath("**"),
+      LottieProperty.COLOR
+    ) { iconTint }
+
+    storiesIcon.addValueCallback(
+      KeyPath("**"),
+      LottieProperty.COLOR
+    ) { iconTint }
 
     view.findViewById<View>(R.id.chats_tab_touch_point).setOnClickListener {
       viewModel.onChatsSelected()
@@ -39,9 +67,19 @@ class ConversationListTabsFragment : Fragment(R.layout.conversation_list_tabs) {
   }
 
   private fun update(state: ConversationListTabsState) {
+    val wasChatSelected = chatsIcon.isSelected
+
     chatsIcon.isSelected = state.tab == ConversationListTab.CHATS
     storiesIcon.isSelected = state.tab == ConversationListTab.STORIES
 
+    chatsPill.isSelected = chatsIcon.isSelected
+    storiesPill.isSelected = storiesIcon.isSelected
+
+    if (chatsIcon.isSelected xor wasChatSelected) {
+      runLottieAnimations(chatsIcon, storiesIcon)
+      runPillAnimation(chatsPill, storiesPill)
+    }
+
     chatsUnreadIndicator.visible = state.unreadChatsCount > 0
     chatsUnreadIndicator.text = formatCount(state.unreadChatsCount)
 
@@ -51,6 +89,47 @@ class ConversationListTabsFragment : Fragment(R.layout.conversation_list_tabs) {
     requireView().visible = !state.isSearchOpen
   }
 
+  private fun runLottieAnimations(vararg toAnimate: LottieAnimationView) {
+    toAnimate.forEach {
+      if (it.isSelected) {
+        it.resumeAnimation()
+      } else {
+        if (it.isAnimating) {
+          it.pauseAnimation()
+        }
+
+        it.progress = 0f
+      }
+    }
+  }
+
+  private fun runPillAnimation(vararg toAnimate: ImageView) {
+    val (selected, unselected) = toAnimate.partition { it.isSelected }
+
+    pillAnimator?.cancel()
+    pillAnimator = AnimatorSet().apply {
+      duration = 150
+      interpolator = PathInterpolatorCompat.create(0.17f, 0.17f, 0f, 1f)
+      playTogether(
+        selected.map { view ->
+          view.visibility = View.VISIBLE
+          ValueAnimator.ofInt(view.paddingLeft, 0).apply {
+            addUpdateListener {
+              view.setPadding(it.animatedValue as Int, 0, it.animatedValue as Int, 0)
+            }
+          }
+        }
+      )
+      start()
+    }
+
+    unselected.forEach {
+      val smallPad = DimensionUnit.DP.toPixels(16f).toInt()
+      it.setPadding(smallPad, 0, smallPad, 0)
+      it.visibility = View.INVISIBLE
+    }
+  }
+
   private fun formatCount(count: Long): String {
     if (count > 99L) {
       return getString(R.string.ConversationListTabs__99p)

app/src/main/res/drawable/conversation_tab_icon_background.xml

@@ -1,10 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<selector xmlns:android="http://schemas.android.com/apk/res/android">
-    <item android:state_selected="true">
-        <shape android:shape="rectangle">
-            <solid android:color="@color/signal_colorPrimaryContainer" />
-            <corners android:radius="18dp" />
-        </shape>
-    </item>
-    <item android:drawable="@color/transparent" />
-</selector>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="@color/signal_colorPrimaryContainer" />
+    <corners android:radius="18dp" />
+</shape>

app/src/main/res/layout/conversation_list_tabs.xml

@@ -6,14 +6,12 @@
     android:layout_height="wrap_content"
     android:background="@color/signal_colorSecondaryContainer"
     android:minHeight="80dp"
-    android:paddingHorizontal="@dimen/dsl_settings_gutter"
-    android:paddingTop="8dp"
-    android:paddingBottom="8dp">
+    android:paddingHorizontal="@dimen/dsl_settings_gutter">
 
     <View
         android:id="@+id/chats_tab_touch_point"
-        android:layout_width="58dp"
-        android:layout_height="48dp"
+        android:layout_width="80dp"
+        android:layout_height="0dp"
         android:background="?selectableItemBackgroundBorderless"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="@id/chats_tab_icon"
@@ -22,28 +20,49 @@
 
     <View
         android:id="@+id/stories_tab_touch_point"
-        android:layout_width="58dp"
-        android:layout_height="48dp"
+        android:layout_width="80dp"
+        android:layout_height="0dp"
         android:background="?selectableItemBackgroundBorderless"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="@id/stories_tab_icon"
         app:layout_constraintStart_toStartOf="@id/stories_tab_icon"
         app:layout_constraintTop_toTopOf="parent" />
 
-    <androidx.appcompat.widget.AppCompatImageView
-        android:id="@+id/chats_tab_icon"
+    <ImageView
+        android:id="@+id/chats_pill"
         android:layout_width="64dp"
         android:layout_height="32dp"
-        android:background="@drawable/conversation_tab_icon_background"
+        android:importantForAccessibility="no"
+        android:src="@drawable/conversation_tab_icon_background"
+        app:layout_constraintBottom_toBottomOf="@id/chats_tab_icon"
+        app:layout_constraintEnd_toEndOf="@id/chats_tab_icon"
+        app:layout_constraintStart_toStartOf="@id/chats_tab_icon"
+        app:layout_constraintTop_toTopOf="@id/chats_tab_icon" />
+
+    <ImageView
+        android:id="@+id/stories_pill"
+        android:layout_width="64dp"
+        android:layout_height="32dp"
+        android:importantForAccessibility="no"
+        android:paddingHorizontal="16dp"
+        android:src="@drawable/conversation_tab_icon_background"
+        app:layout_constraintBottom_toBottomOf="@id/stories_tab_icon"
+        app:layout_constraintEnd_toEndOf="@id/stories_tab_icon"
+        app:layout_constraintStart_toStartOf="@id/stories_tab_icon"
+        app:layout_constraintTop_toTopOf="@id/stories_tab_icon" />
+
+    <com.airbnb.lottie.LottieAnimationView
+        android:id="@+id/chats_tab_icon"
+        android:layout_width="32dp"
+        android:layout_height="32dp"
         android:importantForAccessibility="no"
         android:scaleType="centerInside"
-        android:tint="@color/signal_colorOnSecondaryContainer"
         app:layout_constraintBottom_toTopOf="@id/chats_tab_label"
         app:layout_constraintEnd_toStartOf="@id/tabs_center_guide"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
         app:layout_constraintVertical_chainStyle="packed"
-        app:srcCompat="@drawable/ic_chat_message_24" />
+        app:lottie_rawRes="@raw/chats_32" />
 
     <TextView
         android:id="@+id/chats_tab_label"
@@ -65,20 +84,18 @@
         android:orientation="vertical"
         app:layout_constraintGuide_percent="0.5" />
 
-    <androidx.appcompat.widget.AppCompatImageView
+    <com.airbnb.lottie.LottieAnimationView
         android:id="@+id/stories_tab_icon"
-        android:layout_width="64dp"
+        android:layout_width="32dp"
         android:layout_height="32dp"
-        android:background="@drawable/conversation_tab_icon_background"
         android:importantForAccessibility="no"
         android:scaleType="centerInside"
-        android:tint="@color/signal_colorOnSecondaryContainer"
         app:layout_constraintBottom_toTopOf="@id/stories_tab_label"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toEndOf="@id/tabs_center_guide"
         app:layout_constraintTop_toTopOf="parent"
         app:layout_constraintVertical_chainStyle="packed"
-        app:srcCompat="@drawable/ic_stories_24" />
+        app:lottie_rawRes="@raw/stories_32" />
 
     <TextView
         android:id="@+id/stories_tab_label"
@@ -97,7 +114,8 @@
         android:id="@+id/chats_unread_indicator"
         android:layout_width="wrap_content"
         android:layout_height="16sp"
-        android:layout_marginBottom="21dp"
+        android:layout_marginStart="28.5dp"
+        android:layout_marginTop="6dp"
         android:background="@drawable/tab_unread_circle"
         android:gravity="center_horizontal"
         android:minWidth="16sp"
@@ -106,15 +124,16 @@
         android:textAppearance="@style/Signal.Text.Caption"
         android:textColor="@color/white"
         android:textSize="11sp"
-        app:layout_constraintBottom_toBottomOf="@id/chats_tab_icon"
-        app:layout_constraintEnd_toEndOf="@id/chats_tab_touch_point"
+        app:layout_constraintStart_toStartOf="@id/chats_tab_icon"
+        app:layout_constraintTop_toTopOf="parent"
         tools:text="3" />
 
     <TextView
         android:id="@+id/stories_unread_indicator"
         android:layout_width="wrap_content"
         android:layout_height="16sp"
-        android:layout_marginBottom="21dp"
+        android:layout_marginStart="28.5dp"
+        android:layout_marginTop="6dp"
         android:background="@drawable/tab_unread_circle"
         android:gravity="center_horizontal"
         android:minWidth="16sp"
@@ -123,8 +142,8 @@
         android:textAppearance="@style/Signal.Text.Caption"
         android:textColor="@color/white"
         android:textSize="11sp"
-        app:layout_constraintBottom_toBottomOf="@id/stories_tab_icon"
-        app:layout_constraintEnd_toEndOf="@id/stories_tab_touch_point"
+        app:layout_constraintStart_toStartOf="@id/stories_tab_icon"
+        app:layout_constraintTop_toTopOf="parent"
         tools:text="99+" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>