diff --git a/app/src/main/java/org/autojs/autojs/model/autocomplete/AnyWordsCompletion.java b/app/src/main/java/org/autojs/autojs/model/autocomplete/AnyWordsCompletion.java
index d371498e..511a14b9 100644
--- a/app/src/main/java/org/autojs/autojs/model/autocomplete/AnyWordsCompletion.java
+++ b/app/src/main/java/org/autojs/autojs/model/autocomplete/AnyWordsCompletion.java
@@ -1,6 +1,7 @@
 package org.autojs.autojs.model.autocomplete;
 
 import android.text.Editable;
+import android.text.TextWatcher;
 
 import org.autojs.autojs.model.indices.Property;
 import org.autojs.autojs.ui.widget.SimpleTextWatcher;
@@ -15,7 +16,7 @@ import java.util.regex.Pattern;
  * Created by Stardust on 2018/2/26.
  */
 
-public class AnyWordsCompletion implements SimpleTextWatcher.AfterTextChangedListener {
+public class AnyWordsCompletion extends SimpleTextWatcher {
 
 
     private static final String PATTERN = "[\\W]";
diff --git a/app/src/main/java/org/autojs/autojs/model/autocomplete/AutoCompletion.java b/app/src/main/java/org/autojs/autojs/model/autocomplete/AutoCompletion.java
index ca95c75f..514a3ce8 100644
--- a/app/src/main/java/org/autojs/autojs/model/autocomplete/AutoCompletion.java
+++ b/app/src/main/java/org/autojs/autojs/model/autocomplete/AutoCompletion.java
@@ -45,11 +45,13 @@ public class AutoCompletion {
     private AnyWordsCompletion mAnyWordsCompletion;
     private AtomicInteger mExecuteId = new AtomicInteger();
     private Handler mHandler = new Handler(Looper.getMainLooper());
+    private final EditText mEditText;
 
     public AutoCompletion(Context context, EditText editText) {
         buildDictionaryTree(context);
+        mEditText = editText;
         mAnyWordsCompletion = new AnyWordsCompletion(mExecutorService);
-        editText.addTextChangedListener(new SimpleTextWatcher(mAnyWordsCompletion));
+        editText.addTextChangedListener(mAnyWordsCompletion);
     }
 
     public void setAutoCompleteCallback(AutoCompleteCallback autoCompleteCallback) {
@@ -162,6 +164,7 @@ public class AutoCompletion {
 
 
     public void shutdown(){
+        mEditText.removeTextChangedListener(mAnyWordsCompletion);
         mExecutorService.shutdownNow();
     }
 }
diff --git a/app/src/main/java/org/autojs/autojs/ui/widget/SimpleTextWatcher.java b/app/src/main/java/org/autojs/autojs/ui/widget/SimpleTextWatcher.java
index 1fba7a31..98312c68 100644
--- a/app/src/main/java/org/autojs/autojs/ui/widget/SimpleTextWatcher.java
+++ b/app/src/main/java/org/autojs/autojs/ui/widget/SimpleTextWatcher.java
@@ -43,6 +43,9 @@ public class SimpleTextWatcher implements TextWatcher {
         mOnTextChangedListener = onTextChangedListener;
     }
 
+    public SimpleTextWatcher() {
+    }
+
     @Override
     public void beforeTextChanged(CharSequence s, int start, int count, int after) {
         if (mBeforeTextChangedListener != null) {