1 /* 2 * Copyright 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.car.calendar; 18 19 import android.content.ContentResolver; 20 import android.os.Handler; 21 import android.os.HandlerThread; 22 import android.telephony.TelephonyManager; 23 import android.util.Log; 24 25 import androidx.annotation.Nullable; 26 import androidx.lifecycle.ViewModel; 27 28 import com.android.car.calendar.common.EventDescriptions; 29 import com.android.car.calendar.common.EventLocations; 30 import com.android.car.calendar.common.EventsLiveData; 31 32 import java.time.Clock; 33 import java.util.Locale; 34 35 class CarCalendarViewModel extends ViewModel { 36 private static final String TAG = "CarCalendarViewModel"; 37 private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG); 38 39 private final HandlerThread mHandlerThread = new HandlerThread("CarCalendarBackground"); 40 private final Clock mClock; 41 private final ContentResolver mResolver; 42 private final Locale mLocale; 43 private final TelephonyManager mTelephonyManager; 44 45 @Nullable private EventsLiveData mEventsLiveData; 46 CarCalendarViewModel(ContentResolver resolver, Locale locale, TelephonyManager telephonyManager, Clock clock)47 CarCalendarViewModel(ContentResolver resolver, Locale locale, 48 TelephonyManager telephonyManager, Clock clock) { 49 mLocale = locale; 50 if (DEBUG) Log.d(TAG, "Creating view model"); 51 mResolver = resolver; 52 mTelephonyManager = telephonyManager; 53 mHandlerThread.start(); 54 mClock = clock; 55 } 56 57 /** Creates an {@link EventsLiveData} lazily and always returns the same instance. */ getEventsLiveData()58 EventsLiveData getEventsLiveData() { 59 if (mEventsLiveData == null) { 60 mEventsLiveData = 61 new EventsLiveData( 62 mClock, 63 new Handler(mHandlerThread.getLooper()), 64 mResolver, 65 new EventDescriptions(mLocale, mTelephonyManager), 66 new EventLocations()); 67 } 68 return mEventsLiveData; 69 } 70 71 @Override onCleared()72 protected void onCleared() { 73 super.onCleared(); 74 mHandlerThread.quitSafely(); 75 } 76 } 77