[TimePicker][a11y] Fix Switch Access can't reach clock items

PiperOrigin-RevId: 425684600

Author: paulfthomas

lib/java/com/google/android/material/timepicker/ClockFaceView.java

@@ -31,11 +31,14 @@
 import android.graphics.Rect;
 import android.graphics.RectF;
 import android.graphics.Shader.TileMode;
+import android.os.Bundle;
+import android.os.SystemClock;
 import androidx.appcompat.content.res.AppCompatResources;
 import android.util.AttributeSet;
 import android.util.DisplayMetrics;
 import android.util.SparseArray;
 import android.view.LayoutInflater;
+import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewTreeObserver.OnPreDrawListener;
 import android.view.accessibility.AccessibilityNodeInfo;
@@ -47,6 +50,7 @@
 import androidx.core.view.AccessibilityDelegateCompat;
 import androidx.core.view.ViewCompat;
 import androidx.core.view.accessibility.AccessibilityNodeInfoCompat;
+import androidx.core.view.accessibility.AccessibilityNodeInfoCompat.AccessibilityActionCompat;
 import androidx.core.view.accessibility.AccessibilityNodeInfoCompat.CollectionInfoCompat;
 import androidx.core.view.accessibility.AccessibilityNodeInfoCompat.CollectionItemInfoCompat;
 import com.google.android.material.resources.MaterialResources;
@@ -166,6 +170,22 @@ public void onInitializeAccessibilityNodeInfo(
                     /* selected= */ host.isSelected()));
 
             info.setClickable(true);
+            info.addAction(AccessibilityActionCompat.ACTION_CLICK);
+          }
+
+          @Override
+          public boolean performAccessibilityAction(View host, int action, Bundle args) {
+            if (action == AccessibilityNodeInfoCompat.ACTION_CLICK) {
+              long eventTime = SystemClock.uptimeMillis();
+              float x = host.getX() + host.getWidth() / 2f;
+              float y = host.getY() + host.getHeight() / 2f;
+              clockHandView.onTouchEvent(
+                  MotionEvent.obtain(eventTime, eventTime, MotionEvent.ACTION_DOWN, x, y, 0));
+              clockHandView.onTouchEvent(
+                  MotionEvent.obtain(eventTime, eventTime, MotionEvent.ACTION_UP, x, y, 0));
+              return true;
+            }
+            return super.performAccessibilityAction(host, action, args);
           }
         };
 

lib/java/com/google/android/material/timepicker/res/layout/material_clockface_textview.xml

@@ -20,7 +20,7 @@
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:textColor="?attr/colorOnSurface"
-  android:padding="16dp"
+  android:padding="@dimen/material_clock_number_text_padding"
   android:textSize="@dimen/material_clock_number_text_size"
   android:visibility="gone"
   tools:ignore="SpUsage" />

lib/java/com/google/android/material/timepicker/res/values/dimens.xml

@@ -28,6 +28,7 @@
   <dimen name="material_clock_hand_center_dot_radius">4dp</dimen>
   <!-- TODO(b/158490859) revisit number scaling -->
   <dimen name="material_clock_number_text_size">15dp</dimen>
+  <dimen name="material_clock_number_text_padding">20dp</dimen>
 
   <!-- cursor dimens -->
   <dimen name="material_cursor_inset_bottom">-6dp</dimen>