diff --git a/java/com/android/newbubble/NewBubble.java b/java/com/android/newbubble/NewBubble.java
index 23c4411..34a9585 100644
--- a/java/com/android/newbubble/NewBubble.java
+++ b/java/com/android/newbubble/NewBubble.java
@@ -47,11 +47,14 @@
 import android.view.LayoutInflater;
 import android.view.MotionEvent;
 import android.view.View;
+import android.view.View.AccessibilityDelegate;
 import android.view.ViewGroup;
 import android.view.ViewPropertyAnimator;
 import android.view.ViewTreeObserver.OnPreDrawListener;
 import android.view.WindowManager;
 import android.view.WindowManager.LayoutParams;
+import android.view.accessibility.AccessibilityNodeInfo;
+import android.view.accessibility.AccessibilityNodeInfo.AccessibilityAction;
 import android.view.animation.AnticipateInterpolator;
 import android.view.animation.OvershootInterpolator;
 import android.widget.ImageView;
@@ -228,6 +231,8 @@
     if (isUserAction) {
       logBasicOrCallImpression(DialerImpression.Type.BUBBLE_PRIMARY_BUTTON_EXPAND);
     }
+    setPrimaryButtonAccessibilityAction(
+        context.getString(R.string.a11y_bubble_primary_button_collapse_action));
     viewHolder.setDrawerVisibility(View.INVISIBLE);
     View expandedView = viewHolder.getExpandedView();
     expandedView
@@ -310,6 +315,8 @@
     if (isUserAction && collapseEndAction == CollapseEnd.NOTHING) {
       logBasicOrCallImpression(DialerImpression.Type.BUBBLE_COLLAPSE_BY_USER);
     }
+    setPrimaryButtonAccessibilityAction(
+        context.getString(R.string.a11y_bubble_primary_button_expand_action));
     // Animate expanded view to move from its position to above primary button and hide
     collapseAnimation =
         expandedView
@@ -448,6 +455,9 @@
     viewHolder.setChildClickable(true);
     visibility = Visibility.ENTERING;
 
+    setPrimaryButtonAccessibilityAction(
+        context.getString(R.string.a11y_bubble_primary_button_expand_action));
+
     // Show bubble animation: scale the whole bubble to 1, and change avatar+icon's alpha to 1
     ObjectAnimator scaleXAnimator =
         ObjectAnimator.ofFloat(viewHolder.getPrimaryButton(), "scaleX", 1);
@@ -726,6 +736,11 @@
     exitAnimatorSet.addListener(
         new AnimatorListenerAdapter() {
           @Override
+          public void onAnimationStart(Animator animation) {
+            viewHolder.getPrimaryButton().setAccessibilityDelegate(null);
+          }
+
+          @Override
           public void onAnimationEnd(Animator animation) {
             afterHiding.run();
           }
@@ -793,6 +808,7 @@
     button.setChecked(action.isChecked());
     button.setEnabled(action.isEnabled());
     button.setText(action.getName());
+    button.setContentDescription(action.getName());
     button.setOnClickListener(v -> doAction(action));
   }
 
@@ -822,6 +838,8 @@
     viewHolder
         .getPrimaryIcon()
         .setTranslationX(isDrawingFromRight() ? -primaryIconMoveDistance : 0);
+    setPrimaryButtonAccessibilityAction(
+        context.getString(R.string.a11y_bubble_primary_button_expand_action));
 
     update();
 
@@ -883,6 +901,22 @@
     }
   }
 
+  private void setPrimaryButtonAccessibilityAction(String description) {
+    viewHolder
+        .getPrimaryButton()
+        .setAccessibilityDelegate(
+            new AccessibilityDelegate() {
+              @Override
+              public void onInitializeAccessibilityNodeInfo(View v, AccessibilityNodeInfo info) {
+                super.onInitializeAccessibilityNodeInfo(v, info);
+
+                AccessibilityAction clickAction =
+                    new AccessibilityAction(AccessibilityNodeInfo.ACTION_CLICK, description);
+                info.addAction(clickAction);
+              }
+            });
+  }
+
   @VisibleForTesting
   class ViewHolder {
 
diff --git a/java/com/android/newbubble/res/layout/new_bubble_base.xml b/java/com/android/newbubble/res/layout/new_bubble_base.xml
index 8d47716..216dce0 100644
--- a/java/com/android/newbubble/res/layout/new_bubble_base.xml
+++ b/java/com/android/newbubble/res/layout/new_bubble_base.xml
@@ -38,6 +38,7 @@
         android:layout_marginEnd="@dimen/bubble_shadow_padding_size_horizontal"
         android:layout_marginTop="@dimen/bubble_shadow_padding_size_vertical"
         android:layout_marginBottom="@dimen/bubble_shadow_padding_size_vertical"
+        android:contentDescription="@string/a11y_bubble_description"
         android:background="@drawable/bubble_shape_circle"
         android:measureAllChildren="false"
         android:elevation="@dimen/bubble_elevation"
diff --git a/java/com/android/newbubble/res/values/strings.xml b/java/com/android/newbubble/res/values/strings.xml
new file mode 100644
index 0000000..5b82b18
--- /dev/null
+++ b/java/com/android/newbubble/res/values/strings.xml
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2017 The Android Open Source Project
+  ~
+  ~ 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
+  -->
+
+<resources>
+  <!-- A string for Talkback to read when accessibility user touch bubble. -->
+  <string name="a11y_bubble_description">Dialer bubble</string>
+  <!-- A string to describe available action for accessibility user. It will be read as "Actions:
+    double tap to expand call action menu". -->
+  <string name="a11y_bubble_primary_button_expand_action">Expand call action menu</string>
+  <!-- A string to describe available action for accessibility user. It will be read as "Actions:
+    double tap to collapse call action menu". -->
+  <string name="a11y_bubble_primary_button_collapse_action">Collapse call action menu</string>
+</resources>
\ No newline at end of file