1 /* 2 * Copyright (C) 2021 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.car.settings.applications; 18 19 import android.app.usage.UsageStats; 20 import android.car.drivingstate.CarUxRestrictions; 21 import android.content.Context; 22 23 import androidx.preference.PreferenceGroup; 24 25 import com.android.car.settings.common.FragmentController; 26 import com.android.car.settings.common.PreferenceController; 27 28 import java.util.List; 29 30 /** 31 * Class that controls visibility based on whether there have been recently used apps. 32 * Hidden if there have are no recently used apps. 33 */ 34 public class RecentAppsGroupPreferenceController extends PreferenceController<PreferenceGroup> 35 implements RecentAppsItemManager.RecentAppStatsListener { 36 37 // In most cases, device has recently opened apps. So, assume true by default. 38 private boolean mAreThereRecentlyUsedApps = true; 39 RecentAppsGroupPreferenceController(Context context, String preferenceKey, FragmentController fragmentController, CarUxRestrictions uxRestrictions)40 public RecentAppsGroupPreferenceController(Context context, String preferenceKey, 41 FragmentController fragmentController, CarUxRestrictions uxRestrictions) { 42 super(context, preferenceKey, fragmentController, uxRestrictions); 43 } 44 45 @Override getPreferenceType()46 protected Class<PreferenceGroup> getPreferenceType() { 47 return PreferenceGroup.class; 48 } 49 50 @Override getAvailabilityStatus()51 public int getAvailabilityStatus() { 52 return mAreThereRecentlyUsedApps ? AVAILABLE : CONDITIONALLY_UNAVAILABLE; 53 } 54 55 @Override onRecentAppStatsLoaded(List<UsageStats> recentAppStats)56 public void onRecentAppStatsLoaded(List<UsageStats> recentAppStats) { 57 mAreThereRecentlyUsedApps = !recentAppStats.isEmpty(); 58 refreshUi(); 59 } 60 } 61