diff --git a/app/build.gradle b/app/build.gradle
index 7970e9f..d75b72c 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -5,15 +5,15 @@ plugins {
 }
 
 android {
-    compileSdkVersion 30
+    compileSdkVersion 31
     buildToolsVersion "30.0.2"
 
     defaultConfig {
         applicationId "top.fumiama.simpledict"
         minSdkVersion 26
-        targetSdkVersion 30
-        versionCode 17
-        versionName '3.0'
+        targetSdkVersion 31
+        versionCode 18
+        versionName '3.1.1'
         resConfigs "zh", "zh-rCN"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
@@ -43,15 +43,15 @@ android {
 
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
-    implementation 'androidx.core:core-ktx:1.5.0'
-    implementation 'androidx.appcompat:appcompat:1.3.0'
-    implementation 'com.google.android.material:material:1.3.0'
-    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+    implementation 'androidx.core:core-ktx:1.7.0'
+    implementation 'androidx.appcompat:appcompat:1.4.0'
+    implementation 'com.google.android.material:material:1.4.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.1.2'
     implementation 'androidx.navigation:navigation-fragment-ktx:2.3.5'
     implementation 'androidx.navigation:navigation-ui-ktx:2.3.5'
     implementation 'androidx.legacy:legacy-support-v4:1.0.0'
     testImplementation 'junit:junit:4.13.2'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
     implementation 'com.lapism:search:2.4.1@aar'
 }
\ No newline at end of file
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 3f7dc3d..72f4239 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -15,10 +15,10 @@
         <activity
             android:name=".MainActivity"
             android:label="@string/app_name"
-            android:theme="@style/Theme.SimpleDict.NoActionBar">
+            android:theme="@style/Theme.SimpleDict.NoActionBar"
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
-
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
diff --git a/app/src/main/java/top/fumiama/simpledict/MainActivity.kt b/app/src/main/java/top/fumiama/simpledict/MainActivity.kt
index 4cb0e09..704455c 100644
--- a/app/src/main/java/top/fumiama/simpledict/MainActivity.kt
+++ b/app/src/main/java/top/fumiama/simpledict/MainActivity.kt
@@ -262,7 +262,7 @@ class MainActivity : AppCompatActivity() {
                 }
                 .setNeutralButton("删除") { _, _ ->
                     Thread{
-                        if(dict?.send_del(key) == true) line?.apply {
+                        if(dict?.del(key) == true) line?.apply {
                             val delKey = SpannableString(key)
                             val delData = SpannableString(data)
                             delKey.setSpan(StrikethroughSpan(), 0, key.length, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
@@ -270,6 +270,8 @@ class MainActivity : AppCompatActivity() {
                             ta.text = delKey
                             tn.text = delKey
                             tb.text = delData
+                            start--
+                            end--
                             updateSize()
                         }
                         else runOnUiThread {
diff --git a/app/src/main/java/top/fumiama/simpledict/SimpleDict.kt b/app/src/main/java/top/fumiama/simpledict/SimpleDict.kt
index cbeb737..da8e933 100644
--- a/app/src/main/java/top/fumiama/simpledict/SimpleDict.kt
+++ b/app/src/main/java/top/fumiama/simpledict/SimpleDict.kt
@@ -80,13 +80,13 @@ class SimpleDict(private val client: Client, private val pwd: String, private va
                         dict[k] = data.decodeToString()
                         latestKeys += k
                     } else {
-                        send_del(key) // 去错
+                        sendel(key) // 去错
                     }
                 } else if(!dict.containsKey(k)){
                     dict[k] = data.decodeToString()
                     latestKeys += k
                 } else {
-                    send_del(key) // 去重
+                    sendel(key) // 去重
                 }
             }
         }
@@ -96,10 +96,10 @@ class SimpleDict(private val client: Client, private val pwd: String, private va
     fun filterValues(predicate: (String?) -> Boolean) = dict.filterValues(predicate)
 
     fun fetchDict(doOnLoadFailure: ()->Unit, doOnLoadSuccess: ()->Unit, doCommon: (() -> Unit)? = null) {
-        dict = hashMapOf()
-        latestKeys = arrayOf()
         val noChange = md5File.exists() && dspFile.exists() && !hasNewItem(md5File.readBytes())
         val data = if(noChange) dspFile.readBytes() else raw
+        dict.clear()
+        latestKeys = arrayOf()
         if(data == null) doOnLoadFailure()
         else {
             analyzeDict(data, !noChange)
@@ -108,7 +108,7 @@ class SimpleDict(private val client: Client, private val pwd: String, private va
         doCommon?.let { it() }
     }
 
-    fun send_del(key: String): Boolean {
+    fun del(key: String): Boolean {
         if(spwd == null) return false
         else if(initDict()) {
             val delPass = "del$spwd"
@@ -133,7 +133,7 @@ class SimpleDict(private val client: Client, private val pwd: String, private va
         return false
     }
 
-    private fun send_del(key: ByteArray): Boolean {
+    private fun sendel(key: ByteArray): Boolean {
         if(spwd == null) return false
         else if(initDict()) {
             val delPass = "del$spwd"
@@ -152,7 +152,7 @@ class SimpleDict(private val client: Client, private val pwd: String, private va
     fun set(key: String, value: String): Boolean {
         //if(spwd == null) return false
         val contain = dict.containsKey(key)
-        if((contain && send_del(key)) || !contain) {
+        if((contain && sendel(key.toByteArray())) || !contain) {
             if(initDict()) {
                 val setPass = "set$spwd"
                 client.sendMessage(setPass)
diff --git a/build.gradle b/build.gradle
index aec97cf..24c5744 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,12 +1,12 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
-    ext.kotlin_version = '1.5.20'
+    ext.kotlin_version = '1.5.31'
     repositories {
         google()
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.2.1'
+        classpath 'com.android.tools.build:gradle:4.2.2'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong