| package com.fairphone.hiccup.app; |
| |
| import android.util.Log; |
| |
| import java.io.DataInputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.util.Calendar; |
| import java.util.Date; |
| |
| /** |
| * Copyright 2016 Fairphone B.V. |
| * |
| * 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. |
| */ |
| |
| public class BoardDate { |
| |
| /* The board date is stored in an ingenious format: |
| * Read the binary data of the file, convert it to hex |
| * and you get the decimal representation of the date. |
| * Speechless. |
| */ |
| |
| private static final String BOARD_DATE_FILE = "/persist/board_date.bin"; |
| |
| private static Date boardDate = null; |
| |
| private static final String TAG = "HICCUP"; |
| |
| public static Date getBoardDate() { |
| if (boardDate== null) { |
| boardDate = readBoardDate(); |
| } |
| return boardDate; |
| } |
| |
| private static Date readBoardDate() { |
| long startTime = 0; |
| try { |
| byte[] boardFile = getBoardDateFileInByteArray(); |
| |
| String strDate = bytesToHex(boardFile); |
| startTime = getTimeInMilliseconds(strDate); |
| } catch (Exception e) { |
| Log.e(TAG,"Unknown error while reading board date; using default", e); |
| } |
| return new Date(startTime); |
| } |
| |
| private static byte[] getBoardDateFileInByteArray() |
| { |
| File file = new File(BOARD_DATE_FILE); |
| byte[] fileData = new byte[(int) file.length()]; |
| DataInputStream dis = null; |
| try { |
| dis = new DataInputStream(new FileInputStream(file)); |
| dis.read(fileData); |
| dis.close(); |
| } catch (FileNotFoundException e) { |
| Log.e(TAG,"BoardDateFile not found", e); |
| } catch (IOException e) { |
| Log.e(TAG, "BoardDateFile IOException", e); |
| } |
| finally { |
| return fileData; |
| } |
| } |
| |
| public static String bytesToHex(byte[] bytes) { |
| final char[] hexArray = "0123456789ABCDEF".toCharArray(); |
| char[] hexChars = new char[bytes.length * 2]; |
| for ( int j = 0; j < bytes.length; j++ ) { |
| int v = bytes[j] & 0xFF; |
| hexChars[j * 2] = hexArray[v >>> 4]; |
| hexChars[j * 2 + 1] = hexArray[v & 0x0F]; |
| } |
| return new String(hexChars); |
| } |
| |
| private static long getTimeInMilliseconds(String date) |
| { |
| Calendar cal = Calendar.getInstance(); |
| |
| try { |
| cal.set(Calendar.YEAR, Integer.parseInt(date.substring(0, 4))); |
| cal.set(Calendar.MONTH, Integer.parseInt(date.substring(4, 6))); |
| cal.set(Calendar.DAY_OF_MONTH, Integer.parseInt(date.substring(6, 8))); |
| cal.set(Calendar.HOUR_OF_DAY, 0); |
| cal.set(Calendar.MINUTE, 0); |
| cal.set(Calendar.SECOND, 0); |
| } |
| catch (NumberFormatException e) { |
| Log.e(TAG, "Parse Exception", e); |
| return 0; |
| } |
| return cal.getTimeInMillis(); |
| } |
| } |
| |