[BottomSheet] Add tooltip text for drag handle

PiperOrigin-RevId: 884493892

Author: Material Design Team

lib/java/com/google/android/material/bottomsheet/BottomSheetDragHandleView.java

@@ -23,6 +23,7 @@
 
 import android.annotation.SuppressLint;
 import android.content.Context;
+import android.os.Build;
 import android.os.Handler;
 import android.os.Looper;
 import androidx.appcompat.widget.AppCompatImageView;
@@ -104,12 +105,20 @@ public void onSlide(@NonNull View bottomSheet, float slideOffset) {}
    * the sheet.
    */
   private final OnGestureListener gestureListener = new SimpleOnGestureListener() {
-
     @Override
     public boolean onDown(@NonNull MotionEvent e) {
       return isClickable();
     }
 
+    @Override
+    public void onLongPress(@NonNull MotionEvent e) {
+      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+        performLongClick(e.getX(), e.getY());
+      } else {
+        performLongClick();
+      }
+    }
+
     @Override
     public boolean onSingleTapConfirmed(@NonNull MotionEvent e) {
       return expandOrCollapseBottomSheetIfPossible();
@@ -141,6 +150,11 @@ public BottomSheetDragHandleView(
     // Override the provided context with the wrapped one to prevent it from being used.
     context = getContext();
 
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+      setTooltipText(
+          getResources().getString(R.string.bottomsheet_drag_handle_content_description));
+    }
+
     gestureDetector =
         new GestureDetector(context, gestureListener, new Handler(Looper.getMainLooper()));
 

lib/javatests/com/google/android/material/bottomsheet/BottomSheetDragHandleTest.java

@@ -24,6 +24,7 @@
 import static com.google.common.truth.Truth.assertThat;
 import static org.robolectric.Shadows.shadowOf;
 
+import android.os.Build;
 import android.os.Bundle;
 import androidx.appcompat.app.AppCompatActivity;
 import android.util.SparseIntArray;
@@ -34,6 +35,7 @@
 import android.widget.FrameLayout;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.annotation.RequiresApi;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
 import androidx.core.view.accessibility.AccessibilityNodeInfoCompat.AccessibilityActionCompat;
 import androidx.test.core.app.ApplicationProvider;
@@ -44,6 +46,7 @@
 import org.junit.runner.RunWith;
 import org.robolectric.Robolectric;
 import org.robolectric.RobolectricTestRunner;
+import org.robolectric.annotation.Config;
 
 @RunWith(RobolectricTestRunner.class)
 public class BottomSheetDragHandleTest {
@@ -449,6 +452,13 @@ public void test_customActionSetInExpandedStateWhenNotHideableAndSkipCollapsed()
     assertThat(hasAccessibilityAction(dragHandleView, ACTION_DISMISS.getId())).isFalse();
   }
 
+  @Test
+  @Config(sdk = Build.VERSION_CODES.O)
+  @RequiresApi(Build.VERSION_CODES.O)
+  public void test_tooltipTextSetOnApi26() {
+    assertThat(dragHandleView.getTooltipText()).isNotNull();
+  }
+
   private void assertImportantForAccessibility(boolean important) {
     if (important) {
       assertThat(dragHandleView.getImportantForAccessibility())