| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.systemui.recents.model; |
| |
| import android.content.ComponentName; |
| import android.content.Context; |
| import android.os.Looper; |
| import android.os.UserHandle; |
| import com.android.internal.content.PackageMonitor; |
| import com.android.systemui.recents.misc.SystemServicesProxy; |
| |
| import java.util.HashSet; |
| import java.util.List; |
| |
| /** |
| * The package monitor listens for changes from PackageManager to update the contents of the |
| * Recents list. |
| */ |
| public class RecentsPackageMonitor extends PackageMonitor { |
| public interface PackageCallbacks { |
| public void onPackagesChanged(RecentsPackageMonitor monitor, String packageName, |
| int userId); |
| } |
| |
| PackageCallbacks mCb; |
| SystemServicesProxy mSystemServicesProxy; |
| |
| /** Registers the broadcast receivers with the specified callbacks. */ |
| public void register(Context context, PackageCallbacks cb) { |
| mSystemServicesProxy = new SystemServicesProxy(context); |
| mCb = cb; |
| try { |
| // We register for events from all users, but will cross-reference them with |
| // packages for the current user and any profiles they have |
| register(context, Looper.getMainLooper(), UserHandle.ALL, true); |
| } catch (IllegalStateException e) { |
| e.printStackTrace(); |
| } |
| } |
| |
| /** Unregisters the broadcast receivers. */ |
| @Override |
| public void unregister() { |
| try { |
| super.unregister(); |
| } catch (IllegalStateException e) { |
| e.printStackTrace(); |
| } |
| mSystemServicesProxy = null; |
| mCb = null; |
| } |
| |
| @Override |
| public void onPackageRemoved(String packageName, int uid) { |
| if (mCb == null) return; |
| |
| // Notify callbacks that a package has changed |
| final int eventUserId = getChangingUserId(); |
| mCb.onPackagesChanged(this, packageName, eventUserId); |
| } |
| |
| @Override |
| public boolean onPackageChanged(String packageName, int uid, String[] components) { |
| onPackageModified(packageName); |
| return true; |
| } |
| |
| @Override |
| public void onPackageModified(String packageName) { |
| if (mCb == null) return; |
| |
| // Notify callbacks that a package has changed |
| final int eventUserId = getChangingUserId(); |
| mCb.onPackagesChanged(this, packageName, eventUserId); |
| } |
| |
| /** |
| * Computes the components that have been removed as a result of a change in the specified |
| * package. |
| */ |
| public HashSet<ComponentName> computeComponentsRemoved(List<Task.TaskKey> taskKeys, |
| String packageName, int userId) { |
| // Identify all the tasks that should be removed as a result of the package being removed. |
| // Using a set to ensure that we callback once per unique component. |
| HashSet<ComponentName> existingComponents = new HashSet<ComponentName>(); |
| HashSet<ComponentName> removedComponents = new HashSet<ComponentName>(); |
| for (Task.TaskKey t : taskKeys) { |
| // Skip if this doesn't apply to the current user |
| if (t.userId != userId) continue; |
| |
| ComponentName cn = t.baseIntent.getComponent(); |
| if (cn.getPackageName().equals(packageName)) { |
| if (existingComponents.contains(cn)) { |
| // If we know that the component still exists in the package, then skip |
| continue; |
| } |
| if (mSystemServicesProxy.getActivityInfo(cn, userId) != null) { |
| existingComponents.add(cn); |
| } else { |
| removedComponents.add(cn); |
| } |
| } |
| } |
| return removedComponents; |
| } |
| } |