| /* |
| * Copyright (C) 2017 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.packageinstaller; |
| |
| import android.annotation.NonNull; |
| import android.content.BroadcastReceiver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.os.SystemClock; |
| import android.util.Log; |
| |
| import java.io.File; |
| import java.io.IOException; |
| |
| /** |
| * Manages files of the package installer and resets state during boot. |
| */ |
| public class TemporaryFileManager extends BroadcastReceiver { |
| private static final String LOG_TAG = TemporaryFileManager.class.getSimpleName(); |
| |
| /** |
| * Create a new file to hold a staged file. |
| * |
| * @param context The context of the caller |
| * |
| * @return A new file |
| */ |
| @NonNull |
| public static File getStagedFile(@NonNull Context context) throws IOException { |
| return File.createTempFile("package", ".apk", context.getNoBackupFilesDir()); |
| } |
| |
| /** |
| * Get the file used to store the results of installs. |
| * |
| * @param context The context of the caller |
| * |
| * @return the file used to store the results of installs |
| */ |
| @NonNull |
| public static File getInstallStateFile(@NonNull Context context) { |
| return new File(context.getNoBackupFilesDir(), "install_results.xml"); |
| } |
| |
| /** |
| * Get the file used to store the results of uninstalls. |
| * |
| * @param context The context of the caller |
| * |
| * @return the file used to store the results of uninstalls |
| */ |
| @NonNull |
| public static File getUninstallStateFile(@NonNull Context context) { |
| return new File(context.getNoBackupFilesDir(), "uninstall_results.xml"); |
| } |
| |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| long systemBootTime = System.currentTimeMillis() - SystemClock.elapsedRealtime(); |
| |
| File[] filesOnBoot = context.getNoBackupFilesDir().listFiles(); |
| |
| if (filesOnBoot == null) { |
| return; |
| } |
| |
| for (int i = 0; i < filesOnBoot.length; i++) { |
| File fileOnBoot = filesOnBoot[i]; |
| |
| if (systemBootTime > fileOnBoot.lastModified()) { |
| boolean wasDeleted = fileOnBoot.delete(); |
| if (!wasDeleted) { |
| Log.w(LOG_TAG, "Could not delete " + fileOnBoot.getName() + " onBoot"); |
| } |
| } else { |
| Log.w(LOG_TAG, fileOnBoot.getName() + " was created before onBoot broadcast was " |
| + "received"); |
| } |
| } |
| } |
| } |