diff --git a/app/src/main/java/top/fumiama/simpledict/Client.kt b/app/src/main/java/top/fumiama/simpledict/Client.kt
index 9f8085c..94540b9 100644
--- a/app/src/main/java/top/fumiama/simpledict/Client.kt
+++ b/app/src/main/java/top/fumiama/simpledict/Client.kt
@@ -71,9 +71,11 @@ class Client(private val ip: String, private val port: Int) {
                 var a: Int
                 do {
                     a = din?.read(inMessage)?:0 //a存储返回消息的长度
-                    re += inMessage.copyOf(a)
-                    Log.d("MyC", "reply length:$a")
-                    if(totalSize < 0 && a < bufferSize) break
+                    if(a > 0) {
+                        re += inMessage.copyOf(a)
+                        Log.d("MyC", "reply length:$a")
+                        if(totalSize < 0 && a < bufferSize) break
+                    } else break
                 } while (totalSize > re.size)
             } else Log.d("MyC", "no connect to receive message")
         } catch (e: IOException) {