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.permissioncontroller.permission.data 18 19 import android.app.Application 20 import android.app.WallpaperManager 21 import android.os.UserHandle 22 import com.android.permissioncontroller.PermissionControllerApplication 23 import com.android.permissioncontroller.permission.utils.Utils 24 import kotlinx.coroutines.Job 25 26 /** 27 * A LiveData which tracks selected wallpaper service package 28 * 29 * @param app The current application 30 * @param user The user the services should be determined for 31 */ 32 class SelectedWallpaperServiceLiveData(private val app: Application, private val user: UserHandle) : 33 SmartAsyncMediatorLiveData<String?>() { 34 loadDataAndPostValuenull35 override suspend fun loadDataAndPostValue(job: Job) { 36 if (job.isCancelled) { 37 return 38 } 39 40 val packageName = 41 try { 42 Utils.getUserContext(app, user) 43 .getSystemService(WallpaperManager::class.java) 44 ?.wallpaperInfo 45 ?.packageName 46 } catch (e: NullPointerException) { 47 null 48 } 49 50 postValue(packageName) 51 } 52 53 /** 54 * Repository for [SelectedWallpaperServiceLiveData] 55 * 56 * <p> Key value is a user, value is its corresponding LiveData. 57 */ 58 companion object : DataRepositoryForPackage<UserHandle, SelectedWallpaperServiceLiveData>() { newValuenull59 override fun newValue(key: UserHandle): SelectedWallpaperServiceLiveData { 60 return SelectedWallpaperServiceLiveData(PermissionControllerApplication.get(), key) 61 } 62 } 63 } 64