Adding AccessibilityUtils class

Bug: 7434841

All the functions in this class should be backward compatible to
gingerbread.

Change-Id: I280a64d195b2df123607a5cdad5886e3048dbb92

diff --git a/src/com/android/gallery3d/util/AccessibilityUtils.java b/src/com/android/gallery3d/util/AccessibilityUtils.java
new file mode 100644 (file)
index 0000000..9df8e4e
--- /dev/null
+++ b/src/com/android/gallery3d/util/AccessibilityUtils.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2012 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.
+ */
+
+package com.android.gallery3d.util;
+
+import android.content.Context;
+import android.support.v4.view.accessibility.AccessibilityRecordCompat;
+import android.view.View;
+import android.view.accessibility.AccessibilityEvent;
+import android.view.accessibility.AccessibilityManager;
+
+import com.android.gallery3d.common.ApiHelper;
+
+/**
+ * AccessibilityUtils provides functions needed in accessibility mode. All the functions
+ * in this class are made compatible with gingerbread and later API's
+*/
+public class AccessibilityUtils {
+    public static void makeAnnouncement(View view, CharSequence announcement) {
+        if (view == null)
+            return;
+        if (ApiHelper.HAS_ANNOUNCE_FOR_ACCESSIBILITY) {
+            view.announceForAccessibility(announcement);
+        } else {
+            // For API 15 and earlier, we need to construct an accessibility event
+            Context ctx = view.getContext();
+            AccessibilityManager am = (AccessibilityManager) ctx.getSystemService(
+                    Context.ACCESSIBILITY_SERVICE);
+            if (!am.isEnabled()) return;
+            AccessibilityEvent event = AccessibilityEvent.obtain(
+                    AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED);
+            AccessibilityRecordCompat arc = new AccessibilityRecordCompat(event);
+            arc.setSource(view);
+            event.setClassName(view.getClass().getName());
+            event.setPackageName(view.getContext().getPackageName());
+            event.setEnabled(view.isEnabled());
+            event.getText().add(announcement);
+            am.sendAccessibilityEvent(event);
+        }
+    }
+}
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