1/* 2 * Copyright (C) 2006 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 17package android.text.format; 18 19import android.content.Context; 20 21/** 22 * Utility class to aid in formatting common values that are not covered 23 * by the standard java.util.Formatter. 24 */ 25public final class Formatter { 26 27 /** 28 * Formats a content size to be in the form of bytes, kilobytes, megabytes, etc 29 * 30 * @param context Context to use to load the localized units 31 * @param number size value to be formated 32 * @return formated string with the number 33 */ 34 public static String formatFileSize(Context context, long number) { 35 return formatFileSize(context, number, false); 36 } 37 38 /** 39 * Like {@link #formatFileSize}, but trying to generate shorter numbers 40 * (showing fewer digits of precisin). 41 */ 42 public static String formatShortFileSize(Context context, long number) { 43 return formatFileSize(context, number, true); 44 } 45 46 private static String formatFileSize(Context context, long number, boolean shorter) { 47 if (context == null) { 48 return ""; 49 } 50 51 float result = number; 52 int suffix = com.android.internal.R.string.byteShort; 53 if (result > 900) { 54 suffix = com.android.internal.R.string.kilobyteShort; 55 result = result / 1024; 56 } 57 if (result > 900) { 58 suffix = com.android.internal.R.string.megabyteShort; 59 result = result / 1024; 60 } 61 if (result > 900) { 62 suffix = com.android.internal.R.string.gigabyteShort; 63 result = result / 1024; 64 } 65 if (result > 900) { 66 suffix = com.android.internal.R.string.terabyteShort; 67 result = result / 1024; 68 } 69 if (result > 900) { 70 suffix = com.android.internal.R.string.petabyteShort; 71 result = result / 1024; 72 } 73 String value; 74 if (result < 1) { 75 value = String.format("%.2f", result); 76 } else if (result < 10) { 77 if (shorter) { 78 value = String.format("%.1f", result); 79 } else { 80 value = String.format("%.2f", result); 81 } 82 } else if (result < 100) { 83 if (shorter) { 84 value = String.format("%.0f", result); 85 } else { 86 value = String.format("%.2f", result); 87 } 88 } else { 89 value = String.format("%.0f", result); 90 } 91 return context.getResources(). 92 getString(com.android.internal.R.string.fileSizeSuffix, 93 value, context.getString(suffix)); 94 } 95 96 /** 97 * Returns a string in the canonical IP format ###.###.###.### from a packed integer containing 98 * the IP address. The IP address is expected to be in little-endian format (LSB first). That 99 * is, 0x01020304 will return "4.3.2.1". 100 * 101 * @param addr the IP address as a packed integer with LSB first. 102 * @return string with canonical IP address format. 103 */ 104 public static String formatIpAddress(int addr) { 105 StringBuffer buf = new StringBuffer(); 106 buf.append(addr & 0xff).append('.'). 107 append((addr >>>= 8) & 0xff).append('.'). 108 append((addr >>>= 8) & 0xff).append('.'). 109 append((addr >>>= 8) & 0xff); 110 return buf.toString(); 111 } 112} 113