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 import android.util.Log; 23 24 import java.util.Set; 25 import java.util.concurrent.atomic.AtomicInteger; 26 27 /** 28 * Deletes a specified set of apps as a specified user and calls back once done. 29 */ 30 public class PackageDeletionTask { 31 private static final String TAG = "PackageDeletionTask"; 32 private Set<String> mPackages; 33 private Callback mCallback; 34 private PackageManager mPm; 35 private UserHandle mUser; 36 PackageDeletionTask(PackageManager pm, Set<String> packageNames, Callback callback)37 public PackageDeletionTask(PackageManager pm, Set<String> packageNames, Callback callback) { 38 mPackages = packageNames; 39 mCallback = callback; 40 mPm = pm; 41 mUser = android.os.Process.myUserHandle(); 42 } 43 44 /** 45 * Runs the deletion task and clears out the given packages. Upon completion, the callback 46 * is run, if it is set. 47 */ run()48 public void run() { 49 PackageDeletionObserver observer = new PackageDeletionObserver(mPackages.size()); 50 for (String packageName : mPackages) { 51 try { 52 mPm.deletePackageAsUser(packageName, observer, 0, mUser.getIdentifier()); 53 } catch (IllegalArgumentException e) { 54 // Couldn't find the package, no need to delete. 55 Log.w(TAG, "Could not find package, not deleting " + packageName, e); 56 } 57 } 58 } 59 60 private class PackageDeletionObserver extends IPackageDeleteObserver.Stub { 61 private final AtomicInteger mPackagesRemaining = new AtomicInteger(0); 62 PackageDeletionObserver(int packages)63 public PackageDeletionObserver(int packages) { 64 mPackagesRemaining.set(packages); 65 } 66 67 @Override packageDeleted(String packageName, int returnCode)68 public void packageDeleted(String packageName, int returnCode) { 69 if (returnCode != PackageManager.DELETE_SUCCEEDED) { 70 mCallback.onError(); 71 return; 72 } 73 74 int remaining = mPackagesRemaining.decrementAndGet(); 75 if (remaining == 0) { 76 mCallback.onSuccess(); 77 } 78 } 79 } 80 81 public static abstract class Callback { onSuccess()82 public abstract void onSuccess(); onError()83 public abstract void onError(); 84 } 85 } 86