AlertActivity now behaves as a dialog for accessibility purposes.

automerge: 76ff4dd

* commit '76ff4dd0de8d9747b9341f064dd270c5762705c6':
  AlertActivity now behaves as a dialog for accessibility purposes.

core/java/com/android/internal/app/AlertActivity.java

@@ -17,9 +17,14 @@
 package com.android.internal.app;
 
 import android.app.Activity;
+import android.app.AlertDialog;
+import android.app.Dialog;
 import android.content.DialogInterface;
 import android.os.Bundle;
+import android.text.TextUtils;
 import android.view.KeyEvent;
+import android.view.ViewGroup;
+import android.view.accessibility.AccessibilityEvent;
 
 /**
  * An activity that follows the visual style of an AlertDialog.
@@ -62,6 +67,19 @@ public abstract class AlertActivity extends Activity implements DialogInterface
         }
     }
 
+    @Override
+    public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
+        event.setClassName(Dialog.class.getName());
+        event.setPackageName(getPackageName());
+
+        ViewGroup.LayoutParams params = getWindow().getAttributes();
+        boolean isFullScreen = (params.width == ViewGroup.LayoutParams.MATCH_PARENT) &&
+                (params.height == ViewGroup.LayoutParams.MATCH_PARENT);
+        event.setFullScreen(isFullScreen);
+
+        return false;
+    }
+
     /**
      * Sets up the alert, including applying the parameters to the alert model,
      * and installing the alert's content.