修改Unity2019 Android读取StreamingAsset报错的问题

Author: Jiang Yin

Scripts/Runtime/FileSystem/AndroidFileSystemStream.cs

@@ -180,11 +180,7 @@ protected override int ReadByte()
         /// <returns>实际读取了多少字节。</returns>
         protected override int Read(byte[] buffer, int startIndex, int length)
         {
-#if UNITY_2019_1_OR_NEWER
-            sbyte[] result = null;
-#else
             byte[] result = null;
-#endif
             int bytesRead = InternalRead(length, out result);
             Array.Copy(result, 0, buffer, startIndex, bytesRead);
             return bytesRead;
@@ -247,17 +243,9 @@ private int InternalRead()
             return m_FileStream.Call<int>("read");
         }
 
-#if UNITY_2019_1_OR_NEWER
-        private int InternalRead(int length, out sbyte[] result)
-#else
         private int InternalRead(int length, out byte[] result)
-#endif
         {
-#if UNITY_2019_1_OR_NEWER
-            IntPtr resultPtr = AndroidJNI.NewSByteArray(length);
-#else
             IntPtr resultPtr = AndroidJNI.NewByteArray(length);
-#endif
             int offset = 0;
             int bytesLeft = length;
             while (bytesLeft > 0)
@@ -275,12 +263,7 @@ private int InternalRead(int length, out byte[] result)
                 bytesLeft -= bytesRead;
             }
 
-#if UNITY_2019_1_OR_NEWER
-            result = AndroidJNI.FromSByteArray(resultPtr);
-#else
             result = AndroidJNI.FromByteArray(resultPtr);
-#endif
-
             AndroidJNI.DeleteLocalRef(resultPtr);
             return offset;
         }