1 /* 2 * Copyright (C) 2020 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.notification.app; 18 19 import android.content.Context; 20 import android.os.AsyncTask; 21 import android.service.notification.ConversationChannelWrapper; 22 import android.view.View; 23 24 import androidx.preference.Preference; 25 26 import com.android.settings.R; 27 import com.android.settings.notification.NotificationBackend; 28 import com.android.settingslib.widget.LayoutPreference; 29 30 import java.util.List; 31 32 public class NoConversationsPreferenceController extends ConversationListPreferenceController { 33 34 private static final String KEY = "no_conversations"; 35 36 private List<ConversationChannelWrapper> mConversations; 37 NoConversationsPreferenceController(Context context, NotificationBackend backend)38 public NoConversationsPreferenceController(Context context, 39 NotificationBackend backend) { 40 super(context, backend); 41 } 42 43 @Override getPreferenceKey()44 public String getPreferenceKey() { 45 return KEY; 46 } 47 48 @Override isAvailable()49 public boolean isAvailable() { 50 return true; 51 } 52 53 @Override getSummaryPreference()54 Preference getSummaryPreference() { 55 return null; 56 } 57 58 @Override matchesFilter(ConversationChannelWrapper conversation)59 boolean matchesFilter(ConversationChannelWrapper conversation) { 60 return false; 61 } 62 63 @Override updateState(Preference preference)64 public void updateState(Preference preference) { 65 LayoutPreference pref = (LayoutPreference) preference; 66 // Load conversations 67 new AsyncTask<Void, Void, Void>() { 68 @Override 69 protected Void doInBackground(Void... unused) { 70 mConversations = mBackend.getConversations(false).getList(); 71 return null; 72 } 73 74 @Override 75 protected void onPostExecute(Void unused) { 76 if (mContext == null) { 77 return; 78 } 79 pref.findViewById(R.id.onboarding).setVisibility(mConversations.size() == 0 80 ? View.VISIBLE : View.GONE); 81 preference.setVisible(mConversations.size() == 0); 82 } 83 }.execute(); 84 } 85 } 86