diff --git a/app/build.gradle b/app/build.gradle
index 504fbc3..fa106a5 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -12,8 +12,8 @@ android {
         applicationId "top.fumiama.simpledict"
         minSdkVersion 26
         targetSdkVersion 30
-        versionCode 11
-        versionName '1.9'
+        versionCode 12
+        versionName '1.9.1'
         resConfigs "zh", "zh-rCN"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
diff --git a/app/src/main/java/top/fumiama/simpledict/Client.kt b/app/src/main/java/top/fumiama/simpledict/Client.kt
index 2c70b10..72655d5 100644
--- a/app/src/main/java/top/fumiama/simpledict/Client.kt
+++ b/app/src/main/java/top/fumiama/simpledict/Client.kt
@@ -20,34 +20,38 @@ class Client(private val ip: String, private val port: Int) {
     /**
      * 初始化普通交互连接
      */
-    fun initConnect(depth: Int = 0){
+    fun initConnect(depth: Int = 0): Boolean{
         if(depth > 3) Log.d("MyC", "connect server failed after $depth tries")
         else try {
             sc = Socket(ip, port) //通过socket连接服务器
             din = sc?.getInputStream()  //获取输入流并转换为StreamReader，约定编码格式
             dout = sc?.getOutputStream()    //获取输出流
             sc?.soTimeout = 2333  //设置连接超时限制
-            if (isConnect) Log.d("MyC", "connect server successful")
-            else {
+            return if (isConnect) {
+                Log.d("MyC", "connect server successful")
+                true
+            } else {
                 Log.d("MyC", "connect server failed, now retry...")
                 initConnect(depth + 1)
             }
         } catch (e: IOException) {      //获取输入输出流是可能报IOException的，所以必须try-catch
             e.printStackTrace()
         }
+        return false
     }
 
     /**
      * 发送数据至服务器
      * @param message 要发送至服务器的字符串
      */
-    fun sendMessage(message: CharSequence?) {
+    fun sendMessage(message: CharSequence?): Boolean {
         try {
             if (isConnect) {
                 if (message != null) {        //判断输出流或者消息是否为空，为空的话会产生nullpoint错误
                     dout?.write(message.toString().toByteArray())
                     dout?.flush()
                     Log.d("MyC", "Send msg: $message")
+                    return true
                 } else Log.d("MyC", "The message to be sent is empty")
                 Log.d("MyC", "send message succeed")
             } else Log.d("MyC", "send message failed: no connect")
@@ -55,6 +59,7 @@ class Client(private val ip: String, private val port: Int) {
             Log.d("MyC", "send message failed: crash")
             e.printStackTrace()
         }
+        return false
     }
 
     fun receiveRawMessage(totalSize: Int = -1, bufferSize: Int = 4096) : ByteArray {
@@ -82,17 +87,16 @@ class Client(private val ip: String, private val port: Int) {
     /**
      * 关闭连接
      */
-    fun closeConnect() {
-        try {
+    fun closeConnect() = try {
             din?.close()
             dout?.close()
             sc?.close()
             sc = null
             din = null
             dout = null
+            true
         } catch (e: IOException) {
             e.printStackTrace()
+            false
         }
-        Log.d("MyC", "关闭连接")
-    }
 }
diff --git a/app/src/main/java/top/fumiama/simpledict/MainActivity.kt b/app/src/main/java/top/fumiama/simpledict/MainActivity.kt
index 144a7b9..736ea22 100644
--- a/app/src/main/java/top/fumiama/simpledict/MainActivity.kt
+++ b/app/src/main/java/top/fumiama/simpledict/MainActivity.kt
@@ -40,7 +40,7 @@ class MainActivity : AppCompatActivity() {
     private var dict: SimpleDict? = null
     private var hasLiked = false
     private var cm: ClipboardManager? = null
-    private var ad: ListViewHolder.RecyclerViewAdapter? = null
+    private var ad: LikeViewHolder.RecyclerViewAdapter? = null
     private var lastLikeLine: View? = null
 
     @SuppressLint("ClickableViewAccessibility")
@@ -200,7 +200,7 @@ class MainActivity : AppCompatActivity() {
         }
     }*/
 
-    private fun updateSize() {
+    private fun updateSize() = runOnUiThread {
         lastLikeLine?.fftc?.text = dict?.size?.toString()?:"0"
     }
 
@@ -210,6 +210,7 @@ class MainActivity : AppCompatActivity() {
                 runOnUiThread {
                     Toast.makeText(this@MainActivity, "刷新成功", Toast.LENGTH_SHORT).show()
                     ffsw.isRefreshing = false
+                    ad?.capacity = 5
                     ad?.refresh()
                     doWhenFinish?.apply { this() }
                 }
diff --git a/app/src/main/java/top/fumiama/simpledict/SimpleDict.kt b/app/src/main/java/top/fumiama/simpledict/SimpleDict.kt
index 6586230..f0cb9f3 100644
--- a/app/src/main/java/top/fumiama/simpledict/SimpleDict.kt
+++ b/app/src/main/java/top/fumiama/simpledict/SimpleDict.kt
@@ -7,8 +7,6 @@ class SimpleDict(private val client: Client, private val pwd: String) {   //must
     private var dict = HashMap<String, String?>()
     val size get() = dict.size
     val keys get() = dict.keys
-    //val values get() = dict.values
-    //val size get() = dict.size
     var latestKeys = arrayOf<String>()
     private val raw: ByteArray
         get() {
@@ -17,25 +15,26 @@ class SimpleDict(private val client: Client, private val pwd: String) {   //must
             var firstRecv: ByteArray
             do {
                 re = byteArrayOf()
-                initDict()
-                sendMessageWithDelay("cat", 2333)
-                try {
-                    firstRecv = client.receiveRawMessage()
-                    val firstStr = firstRecv.decodeToString()
-                    var length = ""
-                    for ((i, c) in firstStr.withIndex()) {
-                        if(c.isDigit()) length += c
-                        else {
-                            if(i + 1 < firstRecv.size) re = firstRecv.copyOfRange(i, firstRecv.size)
-                            break
+                if(initDict()) {
+                    sendMessageWithDelay("cat", 2333)
+                    try {
+                        firstRecv = client.receiveRawMessage()
+                        val firstStr = firstRecv.decodeToString()
+                        var length = ""
+                        for ((i, c) in firstStr.withIndex()) {
+                            if(c.isDigit()) length += c
+                            else {
+                                if(i + 1 < firstRecv.size) re = firstRecv.copyOfRange(i, firstRecv.size)
+                                break
+                            }
                         }
+                        re += client.receiveRawMessage(length.toInt() - re.size)
+                        break
+                    } catch (e: Exception){
+                        e.printStackTrace()
                     }
-                    re += client.receiveRawMessage(length.toInt() - re.size)
-                    break
-                } catch (e: Exception){
-                    e.printStackTrace()
+                    closeDict()
                 }
-                closeDict()
             } while (times-- > 0)
             return re
         }
@@ -45,16 +44,22 @@ class SimpleDict(private val client: Client, private val pwd: String) {   //must
         sleep(delay)
     }.start()
 
-    private fun initDict() {
-        client.initConnect()
-        client.sendMessage(pwd)
-        client.receiveRawMessage()
-        sleep(233)
+    private fun initDict(): Boolean {
+        if(client.initConnect()){
+            if(client.sendMessage(pwd)) {
+                client.receiveRawMessage()
+                sleep(233)
+                return true
+            }
+        }
+        return false
     }
 
-    private fun closeDict() {
-        client.sendMessage("quit")
-        client.closeConnect()
+    private fun closeDict(): Boolean {
+        if(client.sendMessage("quit")) {
+            if (client.closeConnect()) return true
+        }
+        return false
     }
 
     private fun analyzeDictBlk(dictBlock: ByteArray) {
@@ -70,7 +75,6 @@ class SimpleDict(private val client: Client, private val pwd: String) {   //must
         Log.d("MySD", "Fetch $key=$data")
     }
 
-    //fun filterKeys(predicate: (String) -> Boolean) = dict.filterKeys(predicate)
     fun filterValues(predicate: (String?) -> Boolean) = dict.filterValues(predicate)
 
     fun fetchDict(doOnLoadSuccess: ()->Unit = {
@@ -86,19 +90,21 @@ class SimpleDict(private val client: Client, private val pwd: String) {   //must
     }
 
     operator fun minusAssign(key: String) {
-        initDict()
-        sendMessageWithDelay("del")
-        client.receiveMessage()
-        sendMessageWithDelay(key)
-        client.receiveMessage()
-        closeDict()
-        dict.remove(key)
-        val end = latestKeys.size-1
-        if(end > 0) latestKeys = latestKeys.let { oldArr ->
-            var index = -1
-            Array(end) {
-                if(oldArr[it] == key) index = it
-                return@Array if(index < 0 || (index > 0 && it < index)) oldArr[it] else oldArr[it+1]
+        if(initDict()) {
+            sendMessageWithDelay("del")
+            client.receiveMessage()
+            sendMessageWithDelay(key)
+            client.receiveMessage()
+            if(closeDict()) {
+                dict.remove(key)
+                val end = latestKeys.size-1
+                if(end > 0) latestKeys = latestKeys.let { oldArr ->
+                    var index = -1
+                    Array(end) {
+                        if(oldArr[it] == key) index = it
+                        return@Array if(index < 0 || (index > 0 && it < index)) oldArr[it] else oldArr[it+1]
+                    }
+                }
             }
         }
     }
@@ -107,15 +113,15 @@ class SimpleDict(private val client: Client, private val pwd: String) {   //must
 
     operator fun set(key: String, value: String): String? {
         val p = dict[key]
-        initDict()
-        sendMessageWithDelay("set")
-        client.receiveMessage()
-        sendMessageWithDelay(key)
-        client.receiveMessage()
-        sendMessageWithDelay(value)
-        client.receiveMessage()
-        closeDict()
-        dict[key] = value
+        if(initDict()) {
+            sendMessageWithDelay("set")
+            client.receiveMessage()
+            sendMessageWithDelay(key)
+            client.receiveMessage()
+            sendMessageWithDelay(value)
+            client.receiveMessage()
+            if(closeDict()) dict[key] = value
+        }
         return p
     }
 }
\ No newline at end of file