From 806ed6836b84fbea87d19a0cb4414e120dd9c049 Mon Sep 17 00:00:00 2001
From: fctom1215 <fctom1215@outlook.com>
Date: 星期五, 14 二月 2020 14:30:44 +0800
Subject: [PATCH] Merge branch 'master' of https://gitee.com/endian11/DriveJudge

---
 app/src/main/java/safeluck/drive/evaluation/util/Utils.java |   74 +++++++++++++++++++++++++++++++++++++
 1 files changed, 74 insertions(+), 0 deletions(-)

diff --git a/app/src/main/java/safeluck/drive/evaluation/util/Utils.java b/app/src/main/java/safeluck/drive/evaluation/util/Utils.java
index cad654f..a0548a7 100644
--- a/app/src/main/java/safeluck/drive/evaluation/util/Utils.java
+++ b/app/src/main/java/safeluck/drive/evaluation/util/Utils.java
@@ -1,7 +1,11 @@
 package safeluck.drive.evaluation.util;
 
 import android.content.res.Resources;
+import android.util.Log;
 import android.util.TypedValue;
+
+import com.anyun.exam.lib.MyLog;
+import com.anyun.exam.lib.util.ByteUtil;
 
 /**
  * MyApplication2
@@ -10,6 +14,7 @@
  * All Rights Saved! Chongqing AnYun Tech co. LTD
  */
 public class Utils {
+    private static final String TAG = "Utils";
     public static float px2dp(float value){
         return TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,value, Resources.getSystem().getDisplayMetrics());
     }
@@ -22,4 +27,73 @@
     public static float dp2Px(int dpValue){
         return TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_PX,dpValue,Resources.getSystem().getDisplayMetrics());
     }
+
+    /**
+     * 骞冲彴鍗忚鐢熸垚鐨勬牎楠岀爜
+     * @param bytes
+     * @return
+     */
+
+    public static byte calCheckCode(byte[] bytes){
+        byte checkCode =0;
+        //銆�鍙備笌杩愮畻鐨勪袱涓�硷紝濡傛灉涓や釜鐩稿簲bit浣嶇浉鍚岋紝鍒欑粨鏋滀负0锛屽惁鍒欎负1銆�
+        for (int i = 0; i < bytes.length; i++) {
+            checkCode ^= bytes[i];
+        }
+
+        return checkCode;
+    }
+
+    /**
+     * 杞箟
+     * 閲囩敤Ox7e琛ㄧず锛岃嫢鏍￠獙鐮併�佹秷鎭ご浠ュ強娑堟伅浣撲腑鍑虹幇0x7e锛屽垯瑕佽繘琛岃浆涔夊鐞嗭紝杞箟瑙勫垯瀹氫箟濡備笅:
+     * 0x7e<鈥斺��>0x7d鍚庣揣璺熶竴涓�0x02锛�
+     * 0x7d<鈥斺��>0x7d鍚庣揣璺熶竴涓�0x01銆�
+     * @param datas
+     * @return
+     */
+    public static byte[] transferMeaning(byte[] datas){
+        byte [] temp = new byte[datas.length*2];
+        int y = 0;
+        temp[y++] = 0x7e;
+        for (int i = 1; i < datas.length-1; i++) {
+            if (datas[i] == 0x7E) {
+                temp[y++] = 0x7D;
+                temp[y++] = 0x02;
+            } else if (datas[i] == 0x7D) {
+                temp[y++] = 0x7D;
+                temp[y++] = 0x01;
+            } else {
+                temp[y++] = datas[i];
+            }
+        }
+        temp[y++] = 0x7e;
+        Log.i(TAG,"杞箟杩囧悗锛�"+ ByteUtil.byte2hex(temp));
+        return temp;
+    }
+
+    /**
+     *鎺ユ敹娑堟伅鏃�:杞箟杩樺師
+     * @param datas
+     * @return
+     */
+    public static byte[] parseMsg(byte[] datas){
+        byte[] temp = new byte[datas.length];
+        int y =0 ;
+        for (int i = 0; i < datas.length; i++) {
+            if (datas[i]==0x7d && datas[i+1]==0x02 ){
+                temp[y++] = 0x7e;
+                i++;
+                continue;
+            }else if (datas[i]==0x7d && datas[i+1]==0x01 ){
+
+                temp[y++] = 0x7d;
+                i++;
+                continue;
+            }else{
+                temp[y++] = datas[i];
+            }
+        }
+        return temp;
+    }
 }

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