1 /* 2 * Copyright (C) 2018 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 com.android.settings.accessibility; 18 19 import static com.android.settings.accessibility.AccessibilityUtil.State.OFF; 20 import static com.android.settings.accessibility.AccessibilityUtil.State.ON; 21 22 import android.accessibilityservice.AccessibilityServiceInfo; 23 import android.content.ComponentName; 24 import android.content.ContentResolver; 25 import android.content.Context; 26 import android.provider.Settings; 27 import android.view.accessibility.AccessibilityManager; 28 29 import com.android.settings.core.TogglePreferenceController; 30 import com.android.settingslib.accessibility.AccessibilityUtils; 31 32 import java.util.List; 33 import java.util.Set; 34 35 /** 36 * PreferenceController for accessibility services to be used by Slices. 37 * Wraps the common logic which enables accessibility services and checks their availability. 38 * <p> 39 * Should not be used in a {@link com.android.settings.dashboard.DashboardFragment}. 40 */ 41 public class AccessibilitySlicePreferenceController extends TogglePreferenceController { 42 43 private final ComponentName mComponentName; 44 45 private static final String EMPTY_STRING = ""; 46 AccessibilitySlicePreferenceController(Context context, String preferenceKey)47 public AccessibilitySlicePreferenceController(Context context, String preferenceKey) { 48 super(context, preferenceKey); 49 mComponentName = ComponentName.unflattenFromString(getPreferenceKey()); 50 51 if (mComponentName == null) { 52 throw new IllegalArgumentException( 53 "Illegal Component Name from: " + preferenceKey); 54 } 55 } 56 57 @Override getSummary()58 public CharSequence getSummary() { 59 final AccessibilityServiceInfo serviceInfo = getAccessibilityServiceInfo(); 60 61 return serviceInfo == null ? EMPTY_STRING : AccessibilitySettings.getServiceSummary( 62 mContext, serviceInfo, isChecked()); 63 } 64 65 @Override isChecked()66 public boolean isChecked() { 67 final ContentResolver contentResolver = mContext.getContentResolver(); 68 final boolean accessibilityEnabled = Settings.Secure.getInt(contentResolver, 69 Settings.Secure.ACCESSIBILITY_ENABLED, OFF) == ON; 70 71 if (!accessibilityEnabled) { 72 return false; 73 } 74 75 final Set<ComponentName> componentNames = 76 AccessibilityUtils.getEnabledServicesFromSettings(mContext); 77 78 return componentNames.contains(mComponentName); 79 } 80 81 @Override setChecked(boolean isChecked)82 public boolean setChecked(boolean isChecked) { 83 if (getAccessibilityServiceInfo() == null) { 84 return false; 85 } 86 AccessibilityUtils.setAccessibilityServiceState(mContext, mComponentName, isChecked); 87 return isChecked == isChecked(); // Verify that it was probably changed. 88 } 89 90 @Override getAvailabilityStatus()91 public int getAvailabilityStatus() { 92 // Return unsupported when the service is disabled or not installed. 93 return getAccessibilityServiceInfo() == null ? UNSUPPORTED_ON_DEVICE : AVAILABLE; 94 } 95 96 @Override isPublicSlice()97 public boolean isPublicSlice() { 98 return true; 99 } 100 getAccessibilityServiceInfo()101 private AccessibilityServiceInfo getAccessibilityServiceInfo() { 102 final AccessibilityManager accessibilityManager = mContext.getSystemService( 103 AccessibilityManager.class); 104 final List<AccessibilityServiceInfo> serviceList = 105 accessibilityManager.getInstalledAccessibilityServiceList(); 106 107 for (AccessibilityServiceInfo serviceInfo : serviceList) { 108 if (mComponentName.equals(serviceInfo.getComponentName())) { 109 return serviceInfo; 110 } 111 } 112 113 return null; 114 } 115 } 116