截取20个字节的数字分割方法

star_lock/lib/blue/io_tool/io_tool.dart

@@ -17,14 +17,32 @@ String uint8ToHex(Uint8List byteArr) {
     return "";
   }
   Uint8List result = Uint8List(byteArr.length << 1);
-  var hexTable = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F']; //16进制字符表
+  var hexTable = [
+    '0',
+    '1',
+    '2',
+    '3',
+    '4',
+    '5',
+    '6',
+    '7',
+    '8',
+    '9',
+    'A',
+    'B',
+    'C',
+    'D',
+    'E',
+    'F'
+  ]; //16进制字符表
   for (var i = 0; i < byteArr.length; i++) {
     var bit = byteArr[i]; //取传入的byteArr的每一位
     var index = bit >> 4 & 15; //右移4位,取剩下四位
     var i2 = i << 1; //byteArr的每一位对应结果的两位,所以对于结果的操作位数要乘2
     result[i2] = hexTable[index].codeUnitAt(0); //左边的值取字符表,转为Unicode放进resut数组
     index = bit & 15; //取右边四位
-    result[i2 + 1] = hexTable[index].codeUnitAt(0); //右边的值取字符表,转为Unicode放进resut数组
+    result[i2 + 1] =
+        hexTable[index].codeUnitAt(0); //右边的值取字符表,转为Unicode放进resut数组
   }
   return String.fromCharCodes(result); //Unicode转回为对应字符,生成字符串返回
 }
@@ -48,6 +66,7 @@ int _byteInt16(List<int> dataDetail, int index){
   int value = (dataDetail[index + 1] & 0xff) << 8 | (dataDetail[index] & 0xff);
   return _toInt16(value);
 }
+
 int _toInt16(int value) {
   var buffer = Int16List(1).buffer;
   var bData = ByteData.view(buffer);
@@ -61,12 +80,13 @@ int _byteInt32(List<int> dataDetail, int index){
   if (checkListIndex(dataDetail, index, 4)) {
     return 0;
   }
-  int value = ((0xFF &
+  int value = ((0xFF & dataDetail[(index + 3)]) << 24 |
-  dataDetail[(index + 3)]) << 24 | (0xFF &
+      (0xFF & dataDetail[index + 2]) << 16 |
-  dataDetail[index + 2]) << 16 | (0xFF & dataDetail[index + 1]) << 8 | 0xFF &
+      (0xFF & dataDetail[index + 1]) << 8 |
-  dataDetail[index]);
+      0xFF & dataDetail[index]);
   return _toInt32(value);
 }
+
 int _toInt32(int value) {
   var buffer = Int32List(2).buffer;
   var bData = ByteData.view(buffer);
@@ -80,7 +100,8 @@ List<int> intToInt8List(int value) =>[value];
 List<int> intToByte2ListHigh(int value) => [value, value >> 8];
 
 //TODO:int->4个字节List 低字节在前，高字节在后(大端存储) 1byte = 8bit
-List<int> intToByte4ListHigh(int value) => [value, value >> 8, value >> 16, value >> 24];
+List<int> intToByte4ListHigh(int value) =>
+    [value, value >> 8, value >> 16, value >> 24];
 
 int byteUInt8(List<int> dataDetail, int index) => _toUInt8(dataDetail[index]);
 int _toUInt8(int value) {
@@ -90,7 +111,8 @@ int _toUInt8(int value){
   return bData.getUint8(0);
 }
 
-int byteUInt16(List<int> dataDetail, int index)=>_byteUInt16(dataDetail, index);
+int byteUInt16(List<int> dataDetail, int index) =>
+    _byteUInt16(dataDetail, index);
 _byteUInt16(List<int> dataDetail, int index) {
   if (checkListIndex(dataDetail, index, 2)) {
     return 0;
@@ -98,6 +120,7 @@ _byteUInt16(List<int> dataDetail, int index){
   int value = (dataDetail[index + 1]) << 8 | dataDetail[index];
   return _toUInt16(value);
 }
+
 int _toUInt16(int value) {
   var buffer = Uint16List(2).buffer;
   var bData = ByteData.view(buffer);
@@ -105,17 +128,17 @@ int _toUInt16(int value){
   return bData.getUint16(0);
 }
 
-
+int byteUInt32(List<int> dataDetail, int index) =>
-int byteUInt32(List<int> dataDetail, int index)=>_byteUInt32(dataDetail, index);
+    _byteUInt32(dataDetail, index);
 
 int _byteUInt32(List<int> dataDetail, int index) {
   if (checkListIndex(dataDetail, index, 4)) {
     return 0;
   }
-  int value = ((0xFF &
+  int value = ((0xFF & dataDetail[(index + 3)]) << 24 |
-  dataDetail[(index + 3)]) << 24 | (0xFF &
+      (0xFF & dataDetail[index + 2]) << 16 |
-  dataDetail[index + 2]) << 16 | (0xFF & dataDetail[index + 1]) << 8 | 0xFF &
+      (0xFF & dataDetail[index + 1]) << 8 |
-  dataDetail[index]);
+      0xFF & dataDetail[index]);
   return _toUInt32(value);
 }
 
@@ -134,8 +157,7 @@ bool checkListIndex(List<int> dataDetail, int index, int offsetLength){
   }
   var len = dataDetail.length;
   bool result = index + offsetLength > len;
-  if(result){
+  if (result) {}
-  }
   return result;
 }
 
@@ -152,6 +174,28 @@ Future<List<int>> loadAssetsFile(String assetsPath) async{
   return byteData.buffer.asUint8List().toList();
 }
 
+//获取截取后的数组
+List<List<T>> splitList<T>(List<T> list, int len) {
+  if (len <= 1) {
+    return [list];
+  }
+
+  List<List<T>> result = [];
+  int index = 1;
+
+  while (true) {
+    if (index * len < list.length) {
+      List<T> temp = list.skip((index - 1) * len).take(len).toList();
+      result.add(temp);
+      index++;
+      continue;
+    }
+    List<T> temp = list.skip((index - 1) * len).toList();
+    result.add(temp);
+    break;
+  }
+  return result;
+}
 
 //TODO:获取数据包分包后包的数量
 int getPackageCount(List<int> data, {required int averageLen}) {
@@ -159,11 +203,8 @@ int getPackageCount(List<int> data,{required int averageLen}){
   return len % averageLen > 0 ? (len ~/ averageLen + 1) : len ~/ averageLen;
 }
 
-List<int>  getSubData({
+List<int> getSubData(
-  required int index,
+    {required int index, required int average, required List<int> data}) {
-  required int average,
-  required List<int> data
-}){
   if (data.isEmpty) {
     return [];
   }
@@ -205,7 +246,6 @@ List<int> reverseList(List<int> srcData){
 //TODO:int->两个字节 List 高字节在前，低字节在后(小端存储) 本工程只有配置 WiFi用到的!!!!
 List<int> intToByte2ListLow(int value) => [value >> 8, value];
 
-
 int dealWeekDays({
   required int mon,
   required int tue,