1e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka/* 2e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * Copyright (C) 2010 The Android Open Source Project 3e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * 4e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * Licensed under the Apache License, Version 2.0 (the "License"); 5e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * you may not use this file except in compliance with the License. 6e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * You may obtain a copy of the License at 7e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * 8e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * http://www.apache.org/licenses/LICENSE-2.0 9e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * 10e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * Unless required by applicable law or agreed to in writing, software 11e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * distributed under the License is distributed on an "AS IS" BASIS, 12e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * See the License for the specific language governing permissions and 14e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * limitations under the License. 15e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka */ 16e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 17e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurkapackage com.android.gallery3d.common; 18e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 19e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurkaimport android.content.Context; 20e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurkaimport android.content.pm.PackageInfo; 21e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurkaimport android.content.pm.PackageManager.NameNotFoundException; 22e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurkaimport android.database.Cursor; 23e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurkaimport android.os.Build; 24e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurkaimport android.os.ParcelFileDescriptor; 25e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurkaimport android.text.TextUtils; 26e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurkaimport android.util.Log; 27e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 28e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurkaimport java.io.Closeable; 29e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurkaimport java.io.IOException; 30e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurkaimport java.io.InterruptedIOException; 31e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 32e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurkapublic class Utils { 33e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka private static final String TAG = "Utils"; 34e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka private static final String DEBUG_TAG = "GalleryDebug"; 35e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 36e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka private static final long POLY64REV = 0x95AC9329AC4BC9B5L; 37e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka private static final long INITIALCRC = 0xFFFFFFFFFFFFFFFFL; 38e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 39e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka private static long[] sCrcTable = new long[256]; 40e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 41e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka private static final boolean IS_DEBUG_BUILD = 42e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka Build.TYPE.equals("eng") || Build.TYPE.equals("userdebug"); 43e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 44e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka private static final String MASK_STRING = "********************************"; 45e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 46e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // Throws AssertionError if the input is false. 47e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static void assertTrue(boolean cond) { 48e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if (!cond) { 49e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka throw new AssertionError(); 50e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 51e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 52e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 53e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // Throws AssertionError with the message. We had a method having the form 54e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // assertTrue(boolean cond, String message, Object ... args); 55e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // However a call to that method will cause memory allocation even if the 56e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // condition is false (due to autoboxing generated by "Object ... args"), 57e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // so we don't use that anymore. 58e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static void fail(String message, Object ... args) { 59e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka throw new AssertionError( 60e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka args.length == 0 ? message : String.format(message, args)); 61e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 62e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 63e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // Throws NullPointerException if the input is null. 64e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static <T> T checkNotNull(T object) { 65e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if (object == null) throw new NullPointerException(); 66e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return object; 67e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 68e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 69e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // Returns true if two input Object are both null or equal 70e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // to each other. 71e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static boolean equals(Object a, Object b) { 72e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return (a == b) || (a == null ? false : a.equals(b)); 73e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 74e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 75e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // Returns the next power of two. 76e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // Returns the input if it is already power of 2. 77e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // Throws IllegalArgumentException if the input is <= 0 or 78e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // the answer overflows. 79e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static int nextPowerOf2(int n) { 80e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if (n <= 0 || n > (1 << 30)) throw new IllegalArgumentException("n is invalid: " + n); 81e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka n -= 1; 82e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka n |= n >> 16; 83e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka n |= n >> 8; 84e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka n |= n >> 4; 85e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka n |= n >> 2; 86e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka n |= n >> 1; 87e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return n + 1; 88e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 89e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 90e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // Returns the previous power of two. 91e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // Returns the input if it is already power of 2. 92e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // Throws IllegalArgumentException if the input is <= 0 93e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static int prevPowerOf2(int n) { 94e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if (n <= 0) throw new IllegalArgumentException(); 95e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return Integer.highestOneBit(n); 96e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 97e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 98e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // Returns the input value x clamped to the range [min, max]. 99e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static int clamp(int x, int min, int max) { 100e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if (x > max) return max; 101e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if (x < min) return min; 102e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return x; 103e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 104e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 105e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // Returns the input value x clamped to the range [min, max]. 106e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static float clamp(float x, float min, float max) { 107e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if (x > max) return max; 108e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if (x < min) return min; 109e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return x; 110e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 111e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 112e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // Returns the input value x clamped to the range [min, max]. 113e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static long clamp(long x, long min, long max) { 114e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if (x > max) return max; 115e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if (x < min) return min; 116e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return x; 117e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 118e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 119e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static boolean isOpaque(int color) { 120e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return color >>> 24 == 0xFF; 121e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 122e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 123e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static void swap(int[] array, int i, int j) { 124e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka int temp = array[i]; 125e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka array[i] = array[j]; 126e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka array[j] = temp; 127e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 128e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 129e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka /** 130e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * A function thats returns a 64-bit crc for string 131e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * 132e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * @param in input string 133e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * @return a 64-bit crc value 134e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka */ 135e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static final long crc64Long(String in) { 136e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if (in == null || in.length() == 0) { 137e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return 0; 138e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 139e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return crc64Long(getBytes(in)); 140e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 141e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 142e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka static { 143e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // http://bioinf.cs.ucl.ac.uk/downloads/crc64/crc64.c 144e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka long part; 145e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka for (int i = 0; i < 256; i++) { 146e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka part = i; 147e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka for (int j = 0; j < 8; j++) { 148e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka long x = ((int) part & 1) != 0 ? POLY64REV : 0; 149e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka part = (part >> 1) ^ x; 150e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 151e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka sCrcTable[i] = part; 152e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 153e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 154e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 155e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static final long crc64Long(byte[] buffer) { 156e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka long crc = INITIALCRC; 157e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka for (int k = 0, n = buffer.length; k < n; ++k) { 158e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka crc = sCrcTable[(((int) crc) ^ buffer[k]) & 0xff] ^ (crc >> 8); 159e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 160e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return crc; 161e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 162e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 163e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static byte[] getBytes(String in) { 164e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka byte[] result = new byte[in.length() * 2]; 165e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka int output = 0; 166e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka for (char ch : in.toCharArray()) { 167e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka result[output++] = (byte) (ch & 0xFF); 168e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka result[output++] = (byte) (ch >> 8); 169e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 170e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return result; 171e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 172e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 173e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static void closeSilently(Closeable c) { 174e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if (c == null) return; 175e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka try { 176e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka c.close(); 177e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } catch (IOException t) { 178e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka Log.w(TAG, "close fail ", t); 179e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 180e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 181e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 182e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static int compare(long a, long b) { 183e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return a < b ? -1 : a == b ? 0 : 1; 184e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 185e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 186e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static int ceilLog2(float value) { 187e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka int i; 188e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka for (i = 0; i < 31; i++) { 189e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if ((1 << i) >= value) break; 190e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 191e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return i; 192e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 193e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 194e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static int floorLog2(float value) { 195e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka int i; 196e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka for (i = 0; i < 31; i++) { 197e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if ((1 << i) > value) break; 198e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 199e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return i - 1; 200e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 201e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 202e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static void closeSilently(ParcelFileDescriptor fd) { 203e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka try { 204e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if (fd != null) fd.close(); 205e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } catch (Throwable t) { 206e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka Log.w(TAG, "fail to close", t); 207e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 208e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 209e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 210e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static void closeSilently(Cursor cursor) { 211e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka try { 212e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if (cursor != null) cursor.close(); 213e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } catch (Throwable t) { 214e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka Log.w(TAG, "fail to close", t); 215e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 216e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 217e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 218e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static float interpolateAngle( 219e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka float source, float target, float progress) { 220e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // interpolate the angle from source to target 221e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // We make the difference in the range of [-179, 180], this is the 222e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // shortest path to change source to target. 223e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka float diff = target - source; 224e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if (diff < 0) diff += 360f; 225e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if (diff > 180) diff -= 360f; 226e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 227e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka float result = source + diff * progress; 228e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return result < 0 ? result + 360f : result; 229e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 230e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 231e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static float interpolateScale( 232e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka float source, float target, float progress) { 233e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return source + progress * (target - source); 234e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 235e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 236e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static String ensureNotNull(String value) { 237e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return value == null ? "" : value; 238e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 239e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 240e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static float parseFloatSafely(String content, float defaultValue) { 241e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if (content == null) return defaultValue; 242e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka try { 243e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return Float.parseFloat(content); 244e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } catch (NumberFormatException e) { 245e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return defaultValue; 246e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 247e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 248e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 249e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static int parseIntSafely(String content, int defaultValue) { 250e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if (content == null) return defaultValue; 251e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka try { 252e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return Integer.parseInt(content); 253e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } catch (NumberFormatException e) { 254e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return defaultValue; 255e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 256e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 257e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 258e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static boolean isNullOrEmpty(String exifMake) { 259e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return TextUtils.isEmpty(exifMake); 260e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 261e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 262e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static void waitWithoutInterrupt(Object object) { 263e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka try { 264e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka object.wait(); 265e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } catch (InterruptedException e) { 266e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka Log.w(TAG, "unexpected interrupt: " + object); 267e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 268e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 269e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 270e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static boolean handleInterrruptedException(Throwable e) { 271e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // A helper to deal with the interrupt exception 272e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // If an interrupt detected, we will setup the bit again. 273e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if (e instanceof InterruptedIOException 274e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka || e instanceof InterruptedException) { 275e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka Thread.currentThread().interrupt(); 276e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return true; 277e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 278e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return false; 279e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 280e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 281e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka /** 282e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka * @return String with special XML characters escaped. 283e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka */ 284e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static String escapeXml(String s) { 285e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka StringBuilder sb = new StringBuilder(); 286e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka for (int i = 0, len = s.length(); i < len; ++i) { 287e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka char c = s.charAt(i); 288e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka switch (c) { 289e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka case '<': sb.append("<"); break; 290e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka case '>': sb.append(">"); break; 291e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka case '\"': sb.append("""); break; 292e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka case '\'': sb.append("'"); break; 293e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka case '&': sb.append("&"); break; 294e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka default: sb.append(c); 295e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 296e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 297e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return sb.toString(); 298e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 299e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 300e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static String getUserAgent(Context context) { 301e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka PackageInfo packageInfo; 302e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka try { 303e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka packageInfo = context.getPackageManager().getPackageInfo(context.getPackageName(), 0); 304e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } catch (NameNotFoundException e) { 305e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka throw new IllegalStateException("getPackageInfo failed"); 306e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 307e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return String.format("%s/%s; %s/%s/%s/%s; %s/%s/%s", 308e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka packageInfo.packageName, 309e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka packageInfo.versionName, 310e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka Build.BRAND, 311e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka Build.DEVICE, 312e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka Build.MODEL, 313e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka Build.ID, 314e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka Build.VERSION.SDK_INT, 315e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka Build.VERSION.RELEASE, 316e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka Build.VERSION.INCREMENTAL); 317e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 318e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 319e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static String[] copyOf(String[] source, int newSize) { 320e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka String[] result = new String[newSize]; 321e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka newSize = Math.min(source.length, newSize); 322e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka System.arraycopy(source, 0, result, 0, newSize); 323e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return result; 324e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 325e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 326e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // Mask information for debugging only. It returns <code>info.toString()</code> directly 327e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // for debugging build (i.e., 'eng' and 'userdebug') and returns a mask ("****") 328e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // in release build to protect the information (e.g. for privacy issue). 329e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static String maskDebugInfo(Object info) { 330e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka if (info == null) return null; 331e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka String s = info.toString(); 332e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka int length = Math.min(s.length(), MASK_STRING.length()); 333e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka return IS_DEBUG_BUILD ? s : MASK_STRING.substring(0, length); 334e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 335e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka 336e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka // This method should be ONLY used for debugging. 337e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka public static void debug(String message, Object ... args) { 338e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka Log.v(DEBUG_TAG, String.format(message, args)); 339e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka } 340e8d1bf7a439450b9979701909164a6baffbe8baeMichael Jurka} 341