1 /* 2 * Copyright (C) 2017 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.applications.assist; 18 19 import android.content.ContentResolver; 20 import android.database.ContentObserver; 21 import android.net.Uri; 22 import android.provider.Settings; 23 24 import androidx.annotation.MainThread; 25 26 import com.android.settingslib.utils.ThreadUtils; 27 28 import java.util.List; 29 30 public abstract class AssistSettingObserver extends ContentObserver { 31 32 private final Uri ASSIST_URI = 33 Settings.Secure.getUriFor(Settings.Secure.ASSISTANT); 34 AssistSettingObserver()35 public AssistSettingObserver() { 36 super(null /* handler */); 37 } 38 register(ContentResolver cr, boolean register)39 public void register(ContentResolver cr, boolean register) { 40 if (register) { 41 cr.registerContentObserver(ASSIST_URI, false, this); 42 final List<Uri> settingUri = getSettingUris(); 43 if (settingUri != null) { 44 for (Uri uri : settingUri) { 45 cr.registerContentObserver(uri, false, this); 46 } 47 } 48 } else { 49 cr.unregisterContentObserver(this); 50 } 51 } 52 53 @Override onChange(boolean selfChange, Uri uri)54 public void onChange(boolean selfChange, Uri uri) { 55 super.onChange(selfChange, uri); 56 boolean shouldUpdatePreference = false; 57 final List<Uri> settingUri = getSettingUris(); 58 if (ASSIST_URI.equals(uri) || (settingUri != null && settingUri.contains(uri))) { 59 shouldUpdatePreference = true; 60 } 61 if (shouldUpdatePreference) { 62 ThreadUtils.postOnMainThread(() -> { 63 onSettingChange(); 64 }); 65 66 } 67 } 68 getSettingUris()69 protected abstract List<Uri> getSettingUris(); 70 71 @MainThread onSettingChange()72 public abstract void onSettingChange(); 73 } 74