AccessibilityUtils.java

/*
 * 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.fastergallery.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.fastergallery.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);
		}
	}
}