1 /* 2 * Copyright (C) 2016 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.storagemanager.deletionhelper; 18 19 import android.content.pm.IPackageDeleteObserver; 20 import android.content.pm.PackageManager; 21 import android.os.UserHandle; 22 23 import java.util.Set; 24 import java.util.concurrent.atomic.AtomicInteger; 25 26 /** 27 * Deletes a specified set of apps as a specified user and calls back once done. 28 */ 29 public class PackageDeletionTask { 30 private Set<String> mPackages; 31 private Callback mCallback; 32 private PackageManager mPm; 33 private UserHandle mUser; 34 35 public PackageDeletionTask(PackageManager pm, Set<String> packageNames, Callback callback) { 36 mPackages = packageNames; 37 mCallback = callback; 38 mPm = pm; 39 mUser = android.os.Process.myUserHandle(); 40 } 41 42 /** 43 * Runs the deletion task and clears out the given packages. Upon completion, the callback 44 * is run, if it is set. 45 */ 46 public void run() { 47 PackageDeletionObserver observer = new PackageDeletionObserver(mPackages.size()); 48 for (String packageName : mPackages) { 49 mPm.deletePackageAsUser(packageName, observer, 0, mUser.getIdentifier()); 50 } 51 } 52 53 private class PackageDeletionObserver extends IPackageDeleteObserver.Stub { 54 private final AtomicInteger mPackagesRemaining = new AtomicInteger(0); 55 56 public PackageDeletionObserver(int packages) { 57 mPackagesRemaining.set(packages); 58 } 59 60 @Override 61 public void packageDeleted(String packageName, int returnCode) { 62 if (returnCode != PackageManager.DELETE_SUCCEEDED) { 63 mCallback.onError(); 64 return; 65 } 66 67 int remaining = mPackagesRemaining.decrementAndGet(); 68 if (remaining == 0) { 69 mCallback.onSuccess(); 70 } 71 } 72 } 73 74 public static abstract class Callback { 75 public abstract void onSuccess(); 76 public abstract void onError(); 77 } 78 } 79
