Fix accessibility delegation

Ensures that delegate code is run last. Previously, calling the super
method from an accessibility delegate set on a widget would only run
code in the widget's parent. Next, the delegate code would run. Finally,
the widget's code would run. As a result, the widget code would override
any data supplied by the delegate.

By moving all overridden code to internal methods, we ensure that the
call chain for super includes the widget's parent code followed by the
widget's code. The delegate code will always run last.

BUG: 17641433
Change-Id: Ib9d403156c1fc4fb04f65f3c126d1277a44b3740

1 files changed, 11 insertions, 7 deletions

diff --git a/core/java/android/widget/TabWidget.java b/core/java/android/widget/TabWidget.java
index 47a5449..bddee91 100644
--- a/core/java/android/widget/TabWidget.java
+++ b/core/java/android/widget/TabWidget.java
@@ -401,8 +401,9 @@ public class TabWidget extends LinearLayout implements OnFocusChangeListener {
         }
     }
 
+    /** @hide */
     @Override
-    public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
+    public boolean dispatchPopulateAccessibilityEventInternal(AccessibilityEvent event) {
         onPopulateAccessibilityEvent(event);
         // Dispatch only to the selected tab.
         if (mSelectedTab != -1) {
@@ -414,28 +415,31 @@ public class TabWidget extends LinearLayout implements OnFocusChangeListener {
         return false;
     }
 
+    /** @hide */
     @Override
-    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
-        super.onInitializeAccessibilityEvent(event);
+    public void onInitializeAccessibilityEventInternal(AccessibilityEvent event) {
+        super.onInitializeAccessibilityEventInternal(event);
         event.setClassName(TabWidget.class.getName());
         event.setItemCount(getTabCount());
         event.setCurrentItemIndex(mSelectedTab);
     }
 
 
+    /** @hide */
     @Override
-    public void sendAccessibilityEventUnchecked(AccessibilityEvent event) {
+    public void sendAccessibilityEventUncheckedInternal(AccessibilityEvent event) {
         // this class fires events only when tabs are focused or selected
         if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_FOCUSED && isFocused()) {
             event.recycle();
             return;
         }
-        super.sendAccessibilityEventUnchecked(event);
+        super.sendAccessibilityEventUncheckedInternal(event);
     }
 
+    /** @hide */
     @Override
-    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
-        super.onInitializeAccessibilityNodeInfo(info);
+    public void onInitializeAccessibilityNodeInfoInternal(AccessibilityNodeInfo info) {
+        super.onInitializeAccessibilityNodeInfoInternal(info);
         info.setClassName(TabWidget.class.getName());
     }