1 /* 2 * Copyright (C) 2018 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 package com.android.wallpaper.module; 17 18 import android.content.Context; 19 import android.content.Intent; 20 import android.content.pm.LauncherApps; 21 import android.content.pm.PackageManager; 22 import android.os.UserHandle; 23 24 import dagger.hilt.android.qualifiers.ApplicationContext; 25 26 import java.util.HashMap; 27 import java.util.Map; 28 29 import javax.inject.Inject; 30 import javax.inject.Singleton; 31 32 33 /** 34 * Default version of {@link PackageStatusNotifier} that uses {@link LauncherApps} 35 */ 36 @Singleton 37 public class DefaultPackageStatusNotifier implements PackageStatusNotifier { 38 39 private final Map<Listener, ListenerWrapper> mListeners = new HashMap<>(); 40 private final Context mAppContext; 41 private final LauncherApps mLauncherApps; 42 43 @Inject DefaultPackageStatusNotifier(@pplicationContext Context context)44 public DefaultPackageStatusNotifier(@ApplicationContext Context context) { 45 mAppContext = context; 46 mLauncherApps = (LauncherApps) context.getSystemService(Context.LAUNCHER_APPS_SERVICE); 47 } 48 49 @Override addListener(Listener listener, String action)50 public void addListener(Listener listener, String action) { 51 ListenerWrapper wrapper = new ListenerWrapper(mAppContext, action, listener); 52 removeListenerAndMaybeUnregisterCallback(listener); 53 mListeners.put(listener, wrapper); 54 mLauncherApps.registerCallback(wrapper); 55 } 56 57 @Override removeListener(Listener listener)58 public void removeListener(Listener listener) { 59 removeListenerAndMaybeUnregisterCallback(listener); 60 } 61 removeListenerAndMaybeUnregisterCallback(Listener listener)62 private void removeListenerAndMaybeUnregisterCallback(Listener listener) { 63 ListenerWrapper oldWrapper = mListeners.remove(listener); 64 if (oldWrapper != null) { 65 mLauncherApps.unregisterCallback(oldWrapper); 66 } 67 } 68 69 private static class ListenerWrapper extends LauncherApps.Callback { 70 71 private final Context mAppContext; 72 private final Intent mIntentFilter; 73 private final Listener mListener; 74 ListenerWrapper(Context context, String action, Listener listener)75 ListenerWrapper(Context context, String action, Listener listener) { 76 mAppContext = context.getApplicationContext(); 77 mIntentFilter = new Intent(action); 78 mListener = listener; 79 } 80 isValidPackage(String packageName)81 private boolean isValidPackage(String packageName) { 82 mIntentFilter.setPackage(packageName); 83 PackageManager pm = mAppContext.getPackageManager(); 84 return !pm.queryIntentServices(mIntentFilter, 0).isEmpty() 85 || !pm.queryIntentActivities(mIntentFilter, 0).isEmpty(); 86 } 87 88 89 @Override onPackageRemoved(String packageName, UserHandle userHandle)90 public void onPackageRemoved(String packageName, UserHandle userHandle) { 91 // We can't check if the removed package is "valid" for the given action, as it's not 92 // there any more, so trigger REMOVED for all cases. 93 mListener.onPackageChanged(packageName, PackageStatus.REMOVED); 94 } 95 96 @Override onPackageAdded(String packageName, UserHandle userHandle)97 public void onPackageAdded(String packageName, UserHandle userHandle) { 98 if (isValidPackage(packageName)) { 99 mListener.onPackageChanged(packageName, PackageStatus.ADDED); 100 } 101 } 102 103 @Override onPackageChanged(String packageName, UserHandle userHandle)104 public void onPackageChanged(String packageName, UserHandle userHandle) { 105 if (isValidPackage(packageName)) { 106 mListener.onPackageChanged(packageName, PackageStatus.CHANGED); 107 } 108 } 109 110 @Override onPackagesAvailable(String[] packageNames, UserHandle userHandle, boolean replacing)111 public void onPackagesAvailable(String[] packageNames, UserHandle userHandle, 112 boolean replacing) { 113 for (String packageName : packageNames) { 114 if (isValidPackage(packageName)) { 115 mListener.onPackageChanged(packageName, 116 replacing ? PackageStatus.CHANGED : PackageStatus.ADDED); 117 } 118 } 119 } 120 121 @Override onPackagesUnavailable(String[] packageNames, UserHandle userHandle, boolean replacing)122 public void onPackagesUnavailable(String[] packageNames, UserHandle userHandle, 123 boolean replacing) { 124 for (String packageName : packageNames) { 125 if (!replacing && isValidPackage(packageName)) { 126 mListener.onPackageChanged(packageName, PackageStatus.REMOVED); 127 } 128 } 129 } 130 131 @Override onPackagesSuspended(String[] packageNames, UserHandle user)132 public void onPackagesSuspended(String[] packageNames, UserHandle user) { 133 for (String packageName : packageNames) { 134 if (isValidPackage(packageName)) { 135 mListener.onPackageChanged(packageName, PackageStatus.REMOVED); 136 } 137 } 138 } 139 140 @Override onPackagesUnsuspended(String[] packageNames, UserHandle user)141 public void onPackagesUnsuspended(String[] packageNames, UserHandle user) { 142 for (String packageName : packageNames) { 143 if (isValidPackage(packageName)) { 144 mListener.onPackageChanged(packageName, PackageStatus.ADDED); 145 } 146 } 147 } 148 } 149 } 150