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 com.android.settings.accessibility; 18 19 import android.content.ContentResolver; 20 import android.database.ContentObserver; 21 import android.net.Uri; 22 import android.os.Handler; 23 import android.provider.Settings; 24 25 import java.util.ArrayList; 26 import java.util.List; 27 28 abstract class SettingsContentObserver extends ContentObserver { 29 private final List<String> mKeysToObserve = new ArrayList<>(2); 30 SettingsContentObserver(Handler handler)31 public SettingsContentObserver(Handler handler) { 32 super(handler); 33 mKeysToObserve.add(Settings.Secure.ACCESSIBILITY_ENABLED); 34 mKeysToObserve.add(Settings.Secure.ENABLED_ACCESSIBILITY_SERVICES); 35 } 36 SettingsContentObserver(Handler handler, List<String> keysToObserve)37 public SettingsContentObserver(Handler handler, List<String> keysToObserve) { 38 this(handler); 39 mKeysToObserve.addAll(keysToObserve); 40 } 41 register(ContentResolver contentResolver)42 public void register(ContentResolver contentResolver) { 43 for (int i = 0; i < mKeysToObserve.size(); i++) { 44 contentResolver.registerContentObserver( 45 Settings.Secure.getUriFor(mKeysToObserve.get(i)), false, this); 46 } 47 } 48 unregister(ContentResolver contentResolver)49 public void unregister(ContentResolver contentResolver) { 50 contentResolver.unregisterContentObserver(this); 51 } 52 53 @Override onChange(boolean selfChange, Uri uri)54 public abstract void onChange(boolean selfChange, Uri uri); 55 } 56