Add vertical translation to the bottom actionbar animation.

app/src/main/java/org/thoughtcrime/securesms/components/menu/ActionItem.kt

@@ -1,7 +1,6 @@
 package org.thoughtcrime.securesms.components.menu
 
 import androidx.annotation.DrawableRes
-import androidx.annotation.StringRes
 
 /**
  * Represents an action to be rendered via [SignalContextMenu] or [SignalBottomActionBar]

app/src/main/java/org/thoughtcrime/securesms/components/menu/SignalBottomActionBar.kt

@@ -6,9 +6,12 @@ import android.util.AttributeSet
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.view.animation.Animation
+import android.view.animation.AnimationUtils
 import android.widget.ImageView
 import android.widget.LinearLayout
 import android.widget.TextView
+import androidx.interpolator.view.animation.FastOutSlowInInterpolator
 import org.thoughtcrime.securesms.R
 import org.thoughtcrime.securesms.util.ViewUtil
 
@@ -22,6 +25,20 @@ class SignalBottomActionBar(context: Context, attributeSet: AttributeSet) : Line
 
   val items: MutableList<ActionItem> = mutableListOf()
 
+  val enterAnimation: Animation by lazy {
+    AnimationUtils.loadAnimation(context, R.anim.slide_fade_from_bottom).apply {
+      duration = 250
+      interpolator = FastOutSlowInInterpolator()
+    }
+  }
+
+  val exitAnimation: Animation by lazy {
+    AnimationUtils.loadAnimation(context, R.anim.slide_fade_to_bottom).apply {
+      duration = 250
+      interpolator = FastOutSlowInInterpolator()
+    }
+  }
+
   init {
     orientation = HORIZONTAL
     setBackgroundResource(R.drawable.signal_bottom_action_bar_background)

app/src/main/java/org/thoughtcrime/securesms/conversationlist/ConversationListFragment.java

@@ -963,7 +963,7 @@ public class ConversationListFragment extends MainFragment implements ActionMode
 
   private void startActionMode() {
     actionMode = ((AppCompatActivity) getActivity()).startSupportActionMode(ConversationListFragment.this);
-    ViewUtil.fadeIn(bottomActionBar, 250);
+    ViewUtil.animateIn(bottomActionBar, bottomActionBar.getEnterAnimation());
     ViewUtil.fadeOut(fab, 250);
     ViewUtil.fadeOut(cameraFab, 250);
     if (megaphoneContainer.resolved()) {
@@ -980,7 +980,7 @@ public class ConversationListFragment extends MainFragment implements ActionMode
   private void endActionMode() {
     actionMode.finish();
     actionMode = null;
-    ViewUtil.fadeOut(bottomActionBar, 250);
+    ViewUtil.animateOut(bottomActionBar, bottomActionBar.getExitAnimation());
     ViewUtil.fadeIn(fab, 250);
     ViewUtil.fadeIn(cameraFab, 250);
     if (megaphoneContainer.resolved()) {

app/src/main/java/org/thoughtcrime/securesms/mediaoverview/MediaOverviewPageFragment.java

@@ -303,14 +303,14 @@ public final class MediaOverviewPageFragment extends Fragment
     FragmentActivity activity = requireActivity();
     actionMode = ((AppCompatActivity) activity).startSupportActionMode(actionModeCallback);
     ((MediaOverviewActivity) activity).onEnterMultiSelect();
-    ViewUtil.fadeIn(bottomActionBar, 250);
+    ViewUtil.animateIn(bottomActionBar, bottomActionBar.getEnterAnimation());
     updateMultiSelect();
   }
 
   private void exitMultiSelect() {
     actionMode.finish();
     actionMode = null;
-    ViewUtil.fadeOut(bottomActionBar, 250);
+    ViewUtil.animateOut(bottomActionBar, bottomActionBar.getExitAnimation());
   }
 
   private void updateMultiSelect() {

app/src/main/java/org/thoughtcrime/securesms/util/ViewUtil.java

@@ -119,6 +119,10 @@ public final class ViewUtil {
     return animateOut(view, getAlphaAnimation(1f, 0f, duration), visibility);
   }
 
+  public static ListenableFuture<Boolean> animateOut(final @NonNull View view, final @NonNull Animation animation) {
+    return animateOut(view, animation, View.GONE);
+  }
+
   public static ListenableFuture<Boolean> animateOut(final @NonNull View view, final @NonNull Animation animation, final int visibility) {
     final SettableFuture future = new SettableFuture();
     if (view.getVisibility() == visibility) {