1 /* 2 * Copyright (C) 2022 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 android.app.sdksandbox; 18 19 import java.io.File; 20 import java.util.List; 21 import java.util.Objects; 22 23 /** 24 * Utility class for performing file related operations 25 * 26 * @hide 27 */ 28 public class FileUtil { 29 30 public static final String TAG = "SdkSandboxManager"; 31 public static final int CONVERSION_FACTOR_FROM_BYTES_TO_KB = 1024; 32 33 /** Calculate the storage of SDK iteratively */ getStorageInKbForPaths(List<String> paths)34 public static int getStorageInKbForPaths(List<String> paths) { 35 float storageSize = 0; 36 for (int i = 0; i < paths.size(); i++) { 37 final File dir = new File(paths.get(i)); 38 39 if (Objects.nonNull(dir)) { 40 storageSize += getStorageForFiles(dir.listFiles()); 41 } 42 } 43 return convertByteToKb(storageSize); 44 } 45 getStorageForFiles(File[] files)46 private static float getStorageForFiles(File[] files) { 47 if (Objects.isNull(files)) { 48 return 0; 49 } 50 51 float sizeInBytes = 0; 52 53 for (File file : files) { 54 if (file.isDirectory()) { 55 sizeInBytes += getStorageForFiles(file.listFiles()); 56 } else { 57 sizeInBytes += file.length(); 58 } 59 } 60 return sizeInBytes; 61 } 62 convertByteToKb(float storageSize)63 private static int convertByteToKb(float storageSize) { 64 return (int) (storageSize / CONVERSION_FACTOR_FROM_BYTES_TO_KB); 65 } 66 } 67