1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.support.v4.view.accessibility; 18 19 import android.os.Bundle; 20 import android.view.accessibility.AccessibilityNodeInfo; 21 import android.view.accessibility.AccessibilityNodeProvider; 22 23 import java.util.List; 24 25 /** 26 * KitKat-specific AccessibilityNodeProvider API implementation. 27 */ 28 class AccessibilityNodeProviderCompatKitKat { 29 interface AccessibilityNodeInfoBridge { createAccessibilityNodeInfo(int virtualViewId)30 public Object createAccessibilityNodeInfo(int virtualViewId); performAction(int virtualViewId, int action, Bundle arguments)31 public boolean performAction(int virtualViewId, int action, Bundle arguments); findAccessibilityNodeInfosByText(String text, int virtualViewId)32 public List<Object> findAccessibilityNodeInfosByText(String text, 33 int virtualViewId); findFocus(int focus)34 public Object findFocus(int focus); 35 } 36 newAccessibilityNodeProviderBridge( final AccessibilityNodeInfoBridge bridge)37 public static Object newAccessibilityNodeProviderBridge( 38 final AccessibilityNodeInfoBridge bridge) { 39 return new AccessibilityNodeProvider() { 40 @Override 41 public AccessibilityNodeInfo createAccessibilityNodeInfo(int virtualViewId) { 42 return (AccessibilityNodeInfo) bridge.createAccessibilityNodeInfo(virtualViewId); 43 } 44 45 @Override 46 @SuppressWarnings("unchecked") 47 public List<AccessibilityNodeInfo> findAccessibilityNodeInfosByText( 48 String text, int virtualViewId) { 49 // Use some voodoo to avoid creating intermediary instances. 50 return (List<AccessibilityNodeInfo>) (List<?>) 51 bridge.findAccessibilityNodeInfosByText(text, virtualViewId); 52 } 53 54 @Override 55 public boolean performAction(int virtualViewId, int action, Bundle arguments) { 56 return bridge.performAction(virtualViewId, action, arguments); 57 } 58 59 @Override 60 public AccessibilityNodeInfo findFocus(int focus) { 61 return (AccessibilityNodeInfo) bridge.findFocus(focus); 62 } 63 }; 64 } 65 } 66