diff --git a/app-release-1.17.0216(1).apk b/app-release-1.17.0217.apk
similarity index 64%
rename from app-release-1.17.0216(1).apk
rename to app-release-1.17.0217.apk
index c228f548..d6aea5bc 100644
Binary files a/app-release-1.17.0216(1).apk and b/app-release-1.17.0217.apk differ
diff --git a/app/build.gradle b/app/build.gradle
index a7070d88..0249ac77 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -7,8 +7,8 @@ android {
         applicationId "com.stardust.scriptdroid"
         minSdkVersion 19
         targetSdkVersion 23
-        versionCode 29
-        versionName "1.17.0216(1)"
+        versionCode 30
+        versionName "1.17.0217"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
     }
     buildTypes {
diff --git a/app/src/main/java/com/stardust/scriptdroid/App.java b/app/src/main/java/com/stardust/scriptdroid/App.java
index e9394b94..5bcda458 100644
--- a/app/src/main/java/com/stardust/scriptdroid/App.java
+++ b/app/src/main/java/com/stardust/scriptdroid/App.java
@@ -41,8 +41,8 @@ public class App extends Application {
             return;
         }
         LeakCanary.install(this);
-        // if (!BuildConfig.DEBUG)
-        Thread.setDefaultUncaughtExceptionHandler(new CrashHandler(ErrorReportActivity.class));
+        if (!BuildConfig.DEBUG)
+            Thread.setDefaultUncaughtExceptionHandler(new CrashHandler(ErrorReportActivity.class));
         instance = new WeakReference<>(this);
         stateObserver = new StateObserver(PreferenceManager.getDefaultSharedPreferences(this));
         registerActivityLifecycleCallback();
diff --git a/app/src/main/java/com/stardust/scriptdroid/Pref.java b/app/src/main/java/com/stardust/scriptdroid/Pref.java
index 748af4fb..352617fd 100644
--- a/app/src/main/java/com/stardust/scriptdroid/Pref.java
+++ b/app/src/main/java/com/stardust/scriptdroid/Pref.java
@@ -11,6 +11,7 @@ public class Pref {
 
     private static final SharedPreferences DISPOSABLE_BOOLEAN = App.getApp().getSharedPreferences("DISPOSABLE_BOOLEAN", Context.MODE_PRIVATE);
     public static final String SAMPLE_SCRIPTS_COPIED = "SAMPLE_SCRIPTS_COPIED";
+    private static final String KEY_MAX_TEXT_LENGTH_FOR_CODE_COMPLETION = "KEY_MAX_TEXT_LENGTH_FOR_CODE_COMPLETION";
 
     public static SharedPreferences def() {
         return PreferenceManager.getDefaultSharedPreferences(App.getApp());
@@ -43,4 +44,12 @@ public class Pref {
     private static String getString(int id) {
         return App.getApp().getString(id);
     }
+
+    public static int MaxTextLengthForCodeCompletion() {
+        try {
+            return Integer.parseInt(def().getString(App.getApp().getString(R.string.key_max_length_for_code_completion), "2000"));
+        } catch (NumberFormatException e) {
+            return 2000;
+        }
+    }
 }
diff --git a/app/src/main/java/com/stardust/scriptdroid/droid/runtime/DroidRuntime.java b/app/src/main/java/com/stardust/scriptdroid/droid/runtime/DroidRuntime.java
index e881d2ef..7602a0c0 100644
--- a/app/src/main/java/com/stardust/scriptdroid/droid/runtime/DroidRuntime.java
+++ b/app/src/main/java/com/stardust/scriptdroid/droid/runtime/DroidRuntime.java
@@ -13,7 +13,6 @@ import com.afollestad.materialdialogs.MaterialDialog;
 import com.jraska.console.Console;
 import com.stardust.scriptdroid.App;
 import com.stardust.scriptdroid.R;
-import com.stardust.scriptdroid.ui.console.ConsoleActivity;
 import com.stardust.scriptdroid.droid.runtime.action.Action;
 import com.stardust.scriptdroid.droid.runtime.action.ActionFactory;
 import com.stardust.scriptdroid.droid.runtime.action.ActionPerformAccessibilityDelegate;
@@ -22,8 +21,8 @@ import com.stardust.scriptdroid.droid.runtime.action.GetTextAction;
 import com.stardust.scriptdroid.droid.runtime.api.IDroidRuntime;
 import com.stardust.scriptdroid.service.AccessibilityWatchDogService;
 import com.stardust.scriptdroid.tool.Shell;
+import com.stardust.scriptdroid.ui.console.ConsoleActivity;
 
-import java.util.Collections;
 import java.util.List;
 
 import timber.log.Timber;
@@ -40,7 +39,6 @@ public class DroidRuntime implements IDroidRuntime {
     private static DroidRuntime runtime = new DroidRuntime();
 
     private final Object mActionPerformLock = new Object();
-    private boolean mActionPerformResult;
     private Handler mUIHandler;
 
     public static DroidRuntime getRuntime() {
@@ -168,7 +166,7 @@ public class DroidRuntime implements IDroidRuntime {
         Console.clear();
     }
 
-    private boolean performAction(Action action) {
+    private <T> T performAction(Action action) {
         if (AccessibilityWatchDogService.getInstance() == null) {
             toast(App.getApp().getString(R.string.text_no_accessibility_permission));
             throw new ScriptStopException(App.getApp().getString(R.string.text_no_accessibility_permission));
@@ -182,25 +180,11 @@ public class DroidRuntime implements IDroidRuntime {
                 throw new ScriptStopException(App.getApp().getString(R.string.text_script_stopped), e);
             }
         }
-        return mActionPerformResult;
+        return (T) action.getResult();
     }
 
     public List<String> getTexts() {
-        if (AccessibilityWatchDogService.getInstance() == null) {
-            toast(App.getApp().getString(R.string.text_no_accessibility_permission));
-            throw new ScriptStopException(App.getApp().getString(R.string.text_no_accessibility_permission));
-        }
-        GetTextAction.result = Collections.EMPTY_LIST;
-        ActionPerformAccessibilityDelegate.setAction(new GetTextAction());
-        synchronized (mActionPerformLock) {
-            try {
-                mActionPerformLock.wait();
-                return GetTextAction.result;
-            } catch (InterruptedException e) {
-                ActionPerformAccessibilityDelegate.setAction(ActionPerformAccessibilityDelegate.NO_ACTION);
-                throw new ScriptStopException(App.getApp().getString(R.string.text_script_stopped), e);
-            }
-        }
+        return performAction(new GetTextAction());
     }
 
     @Override
@@ -260,8 +244,7 @@ public class DroidRuntime implements IDroidRuntime {
         };
     }
 
-    public void notifyActionPerformed(boolean succeed) {
-        mActionPerformResult = succeed;
+    public void notifyActionPerformed() {
         synchronized (mActionPerformLock) {
             mActionPerformLock.notify();
         }
diff --git a/app/src/main/java/com/stardust/scriptdroid/droid/runtime/action/Action.java b/app/src/main/java/com/stardust/scriptdroid/droid/runtime/action/Action.java
index 52909c8f..6d707003 100644
--- a/app/src/main/java/com/stardust/scriptdroid/droid/runtime/action/Action.java
+++ b/app/src/main/java/com/stardust/scriptdroid/droid/runtime/action/Action.java
@@ -8,8 +8,8 @@ import android.view.accessibility.AccessibilityNodeInfo;
 
 public abstract class Action {
 
-
     private boolean mPerformUtilSucceed = false;
+    private Object mResult;
 
     public Action(boolean performUtilSucceed) {
         mPerformUtilSucceed = performUtilSucceed;
@@ -30,5 +30,11 @@ public abstract class Action {
         return this;
     }
 
+    public Object getResult() {
+        return mResult;
+    }
 
+    public void setResult(Object result) {
+        mResult = result;
+    }
 }
diff --git a/app/src/main/java/com/stardust/scriptdroid/droid/runtime/action/ActionPerformAccessibilityDelegate.java b/app/src/main/java/com/stardust/scriptdroid/droid/runtime/action/ActionPerformAccessibilityDelegate.java
index 93bdbf20..46c9d463 100644
--- a/app/src/main/java/com/stardust/scriptdroid/droid/runtime/action/ActionPerformAccessibilityDelegate.java
+++ b/app/src/main/java/com/stardust/scriptdroid/droid/runtime/action/ActionPerformAccessibilityDelegate.java
@@ -37,18 +37,20 @@ public class ActionPerformAccessibilityDelegate implements AccessibilityDelegate
         }
         Log.i(TAG, "perform action:" + action);
         if (action.perform(root)) {
-            onActionPerformed(true);
+            action.setResult(true);
+            onActionPerformed();
         } else if (!action.performUtilSucceed()) {
-            onActionPerformed(false);
+            action.setResult(false);
+            onActionPerformed();
         }
         return false;
     }
 
 
-    private void onActionPerformed(boolean succeed) {
+    private void onActionPerformed() {
         synchronized (ActionPerformAccessibilityDelegate.class) {
             action = NO_ACTION;
-            DroidRuntime.getRuntime().notifyActionPerformed(succeed);
+            DroidRuntime.getRuntime().notifyActionPerformed();
         }
     }
 
diff --git a/app/src/main/java/com/stardust/scriptdroid/droid/runtime/action/GetTextAction.java b/app/src/main/java/com/stardust/scriptdroid/droid/runtime/action/GetTextAction.java
index 26fc858e..6e900374 100644
--- a/app/src/main/java/com/stardust/scriptdroid/droid/runtime/action/GetTextAction.java
+++ b/app/src/main/java/com/stardust/scriptdroid/droid/runtime/action/GetTextAction.java
@@ -11,13 +11,12 @@ import java.util.List;
 
 public class GetTextAction extends Action {
 
-    public static List<String> result;
 
     @Override
     public boolean perform(AccessibilityNodeInfo root) {
         List<String> texts = new ArrayList<>();
         getText(root, texts);
-        result = texts;
+        super.setResult(texts);
         return true;
     }
 
@@ -34,4 +33,10 @@ public class GetTextAction extends Action {
             }
         }
     }
+
+    @Override
+    public void setResult(Object result) {
+        if (result instanceof List)
+            super.setResult(result);
+    }
 }
diff --git a/app/src/main/java/com/stardust/scriptdroid/ui/edit/EditActivity.java b/app/src/main/java/com/stardust/scriptdroid/ui/edit/EditActivity.java
index a380bfa5..f361ad30 100644
--- a/app/src/main/java/com/stardust/scriptdroid/ui/edit/EditActivity.java
+++ b/app/src/main/java/com/stardust/scriptdroid/ui/edit/EditActivity.java
@@ -17,6 +17,7 @@ import com.afollestad.materialdialogs.DialogAction;
 import com.afollestad.materialdialogs.MaterialDialog;
 import com.jecelyin.editor.v2.common.Command;
 import com.jecelyin.editor.v2.common.SaveListener;
+import com.jecelyin.editor.v2.core.widget.TextView;
 import com.jecelyin.editor.v2.ui.EditorDelegate;
 import com.jecelyin.editor.v2.view.EditorView;
 import com.jecelyin.editor.v2.view.menu.MenuDef;
@@ -24,6 +25,7 @@ import com.stardust.scriptdroid.App;
 import com.stardust.scriptdroid.Pref;
 import com.stardust.scriptdroid.R;
 import com.stardust.scriptdroid.droid.Droid;
+import com.stardust.scriptdroid.ui.edit.completion.InputMethodEnhanceBar;
 import com.stardust.scriptdroid.ui.edit.sidemenu.AssistClipListRecyclerView;
 import com.stardust.scriptdroid.ui.edit.sidemenu.EditSideMenuFragment;
 import com.stardust.scriptdroid.ui.edit.sidemenu.FunctionListRecyclerView;
@@ -156,8 +158,27 @@ public class EditActivity extends Editor920Activity {
     private void setUpEditor() {
         if (mFile != null) {
             mEditorDelegate = new EditorDelegate(0, mFile, 0, null);
-            EditorView editorView = (EditorView) findViewById(R.id.editor);
+            final EditorView editorView = (EditorView) findViewById(R.id.editor);
             mEditorDelegate.setEditorView(editorView);
+            InputMethodEnhanceBar inputMethodEnhanceBar = (InputMethodEnhanceBar) findViewById(R.id.input_method_enhance_bar);
+            inputMethodEnhanceBar.setEditTextBridge(new InputMethodEnhanceBar.EditTextBridge() {
+                @Override
+                public void appendText(CharSequence text) {
+                    insertText(text);
+                }
+
+                @Override
+                public void backspace(int count) {
+
+                }
+
+                @Override
+                public TextView getEditText() {
+                    return editorView.getEditText();
+                }
+
+
+            });
         }
     }
 
diff --git a/app/src/main/java/com/stardust/scriptdroid/ui/edit/completion/CodeCompletion.java b/app/src/main/java/com/stardust/scriptdroid/ui/edit/completion/CodeCompletion.java
new file mode 100644
index 00000000..e3e5a78c
--- /dev/null
+++ b/app/src/main/java/com/stardust/scriptdroid/ui/edit/completion/CodeCompletion.java
@@ -0,0 +1,158 @@
+package com.stardust.scriptdroid.ui.edit.completion;
+
+import android.text.Editable;
+import android.text.TextUtils;
+import android.text.TextWatcher;
+import android.util.Log;
+
+import com.jecelyin.editor.v2.core.widget.TextView;
+import com.stardust.scriptdroid.Pref;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.Set;
+import java.util.TreeSet;
+
+/**
+ * Created by Stardust on 2017/2/17.
+ */
+
+public class CodeCompletion implements TextWatcher {
+
+
+    public static class CodeCompletionItem implements Comparable<CodeCompletionItem> {
+        String mDisplayText, mAppendText;
+
+        CodeCompletionItem(String displayText, String appendText) {
+            mDisplayText = displayText;
+            mAppendText = appendText;
+        }
+
+        CodeCompletionItem(String text) {
+            this(text, text);
+        }
+
+        public String getAppendText() {
+            return mAppendText;
+        }
+
+        public String getDisplayText() {
+            return mDisplayText;
+        }
+
+        @Override
+        public int compareTo(CodeCompletionItem o) {
+            return mDisplayText.compareTo(o.mDisplayText);
+        }
+    }
+
+    interface OnCodeCompletionChangeListener {
+        void OnCodeCompletionChange(Collection<CodeCompletionItem> list);
+    }
+
+    private static final String TAG = "CodeCompletion";
+
+    private OnCodeCompletionChangeListener mOnCodeCompletionChangeListener;
+    private TextView mEditText;
+
+    public CodeCompletion(OnCodeCompletionChangeListener listener) {
+        mOnCodeCompletionChangeListener = listener;
+    }
+
+    public void setEditText(TextView editText) {
+        mEditText = editText;
+        mEditText.addTextChangedListener(this);
+    }
+
+    @Override
+    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
+        Log.v(TAG, "beforeTextChanged: s=" + s + " start=" + start + " count=" + count + " after=" + after);
+    }
+
+    @Override
+    public void onTextChanged(CharSequence s, int start, int before, int count) {
+        Log.v(TAG, "onTextChanged: s=" + s + " start=" + start + " count=" + count);
+    }
+
+    @Override
+    public void afterTextChanged(Editable s) {
+        int position = mEditText.getSelectionStart();
+        String str = parseWordBefore(s, position);
+        if (!TextUtils.isEmpty(str))
+            searchCodeCompletion(str);
+        else
+            mOnCodeCompletionChangeListener.OnCodeCompletionChange(DEFAULT_CODE_COMPLETION_LIST);
+    }
+
+    private String parseWordBefore(Editable s, int position) {
+        int i;
+        for (i = position - 1; i >= 0; i--) {
+            if (position - i > KEY_WORD_LENGTH_MAX) {
+                return null;
+            }
+            if (!Character.isLetter(s.charAt(i))) {
+                break;
+            }
+        }
+        if (i < position - 1) {
+            return s.subSequence(i + 1, position).toString();
+        }
+        return null;
+    }
+
+
+    private static final String[] KEYWORDS = {"arguments", "break", "case", "catch", "class", "continue", "default", "do", "else", "eval", "export", "false", "for", "function", "if", "import", "in", "int", "new", "null", "package", "return", "switch", "this", "throw", "throws", "true", "try", "typeof", "var", "volatile", "while", "with", "Array", "Date", "hasOwnProperty", "Infinity", "isFinite", "isNaN", "isPrototypeOf", "length", "Math", "NaN", "name", "Number", "Object", "prototype", "String", "toString", "undefined", "valueOf"};
+    private static final int KEY_WORD_LENGTH_MAX = 15;
+    private static final String[] FUNCTIONS = {"launchApp", "click", "longClick", "scrollUp", "scrollDown", "toast", "launch", "input", "notStopped", "shell", "importClass"};
+
+    private boolean searchCodeCompletion(String str) {
+        Collection<CodeCompletionItem> c = searchWordCompletion(str);
+        c.addAll(searchCodeCompletion(str, FUNCTIONS));
+        c.addAll(searchKeyWordCompletion(str));
+        if (c.size() > 0) {
+            mOnCodeCompletionChangeListener.OnCodeCompletionChange(c);
+            return true;
+        } else {
+            mOnCodeCompletionChangeListener.OnCodeCompletionChange(DEFAULT_CODE_COMPLETION_LIST);
+            return false;
+        }
+    }
+
+    private Collection<CodeCompletionItem> searchWordCompletion(String str) {
+        if (mEditText.getEditableText().length() < Pref.MaxTextLengthForCodeCompletion()) {
+            return searchCodeCompletion(str, splitWord(mEditText.getEditableText().toString()));
+        }
+        return new TreeSet<>();
+    }
+
+    private Collection<CodeCompletionItem> searchCodeCompletion(String str, String[] words) {
+        Set<CodeCompletionItem> set = new TreeSet<>();
+        for (String word : words) {
+            // TODO: 2017/2/18 优化 字典树
+            if (word.startsWith(str) && str.length() < word.length()) {
+                set.add(new CodeCompletionItem(word, word.substring(str.length())));
+            }
+        }
+        return set;
+    }
+
+    private String[] splitWord(String s) {
+        // TODO: 2017/2/18 优化。利用上次结果
+        return s.split("[\\W]");
+    }
+
+    private Collection<CodeCompletionItem> searchKeyWordCompletion(String str) {
+        return searchCodeCompletion(str, KEYWORDS);
+    }
+
+
+    private static final String[] DEFAULT_CODE_COMPLETIONS = new String[]{"=", "(", ")", ";", "{", "}", "\"", "!", "[", "]", ".", ","};
+    private static final List<CodeCompletionItem> DEFAULT_CODE_COMPLETION_LIST = new ArrayList<>();
+
+    static {
+        for (String str : DEFAULT_CODE_COMPLETIONS) {
+            DEFAULT_CODE_COMPLETION_LIST.add(new CodeCompletionItem(str));
+        }
+    }
+}
diff --git a/app/src/main/java/com/stardust/scriptdroid/ui/edit/completion/InputMethodEnhanceBar.java b/app/src/main/java/com/stardust/scriptdroid/ui/edit/completion/InputMethodEnhanceBar.java
new file mode 100644
index 00000000..d2e8bd24
--- /dev/null
+++ b/app/src/main/java/com/stardust/scriptdroid/ui/edit/completion/InputMethodEnhanceBar.java
@@ -0,0 +1,103 @@
+package com.stardust.scriptdroid.ui.edit.completion;
+
+import android.content.Context;
+import android.support.annotation.Nullable;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.util.AttributeSet;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import com.stardust.scriptdroid.R;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+/**
+ * Created by Stardust on 2017/2/17.
+ */
+
+public class InputMethodEnhanceBar extends RecyclerView implements CodeCompletion.OnCodeCompletionChangeListener {
+
+
+    public InputMethodEnhanceBar(Context context) {
+        super(context);
+        init();
+    }
+
+    public InputMethodEnhanceBar(Context context, @Nullable AttributeSet attrs) {
+        super(context, attrs);
+        init();
+    }
+
+    public InputMethodEnhanceBar(Context context, @Nullable AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        init();
+    }
+
+    public interface EditTextBridge {
+        void appendText(CharSequence text);
+
+        void backspace(int count);
+
+        com.jecelyin.editor.v2.core.widget.TextView getEditText();
+    }
+
+    EditTextBridge mEditTextBridge;
+    private CodeCompletion mCodeCompletion = new CodeCompletion(this);
+    private List<CodeCompletion.CodeCompletionItem> mCodeCompletionList = new ArrayList<>();
+    private OnClickListener mOnCodeCompletionItemClickListener = new OnClickListener() {
+        @Override
+        public void onClick(View v) {
+            int position = getChildViewHolder(v).getAdapterPosition();
+            mEditTextBridge.appendText(mCodeCompletionList.get(position).getAppendText());
+        }
+    };
+
+    private void init() {
+        setAdapter(new CodeCompletionAdapter());
+        setLayoutManager(new LinearLayoutManager(getContext(), HORIZONTAL, false));
+    }
+
+    public void setEditTextBridge(EditTextBridge editTextBridge) {
+        mEditTextBridge = editTextBridge;
+        mCodeCompletion.setEditText(mEditTextBridge.getEditText());
+    }
+
+    @Override
+    public void OnCodeCompletionChange(Collection<CodeCompletion.CodeCompletionItem> list) {
+        mCodeCompletionList.clear();
+        mCodeCompletionList.addAll(list);
+        getAdapter().notifyDataSetChanged();
+    }
+
+
+    private class CodeCompletionAdapter extends RecyclerView.Adapter<ViewHolder> {
+
+        @Override
+        public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+            return new ViewHolder(LayoutInflater.from(getContext()).inflate(R.layout.input_method_enhance_bar_item, parent, false));
+        }
+
+        @Override
+        public void onBindViewHolder(ViewHolder holder, int position) {
+            ((TextView) holder.itemView).setText(mCodeCompletionList.get(position).getDisplayText());
+        }
+
+        @Override
+        public int getItemCount() {
+            return mCodeCompletionList.size();
+        }
+    }
+
+    private class ViewHolder extends RecyclerView.ViewHolder {
+
+        ViewHolder(View itemView) {
+            super(itemView);
+            itemView.setOnClickListener(mOnCodeCompletionItemClickListener);
+        }
+    }
+}
diff --git a/app/src/main/res/layout/content_edit.xml b/app/src/main/res/layout/content_edit.xml
index 46e2554c..8c9ec51d 100644
--- a/app/src/main/res/layout/content_edit.xml
+++ b/app/src/main/res/layout/content_edit.xml
@@ -10,7 +10,8 @@
     <com.jecelyin.editor.v2.view.EditorView xmlns:android="http://schemas.android.com/apk/res/android"
                                             android:id="@+id/editor"
                                             android:layout_width="match_parent"
-                                            android:layout_height="match_parent">
+                                            android:layout_height="0dp"
+                                            android:layout_weight="1">
 
 
         <com.jecelyin.editor.v2.core.widget.JecEditText
@@ -35,6 +36,13 @@
             android:indeterminate="true"
             android:visibility="gone"/>
 
+        <com.stardust.scriptdroid.ui.edit.completion.InputMethodEnhanceBar
+            android:id="@+id/input_method_enhance_bar"
+            android:layout_width="match_parent"
+            android:layout_height="35dp"
+            android:layout_alignParentBottom="true"
+            android:background="#e7ebec"/>
+
     </com.jecelyin.editor.v2.view.EditorView>
 
 
diff --git a/app/src/main/res/layout/input_method_enhance_bar_item.xml b/app/src/main/res/layout/input_method_enhance_bar_item.xml
new file mode 100644
index 00000000..ef3c2ae4
--- /dev/null
+++ b/app/src/main/res/layout/input_method_enhance_bar_item.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
+          android:layout_width="wrap_content"
+          android:layout_height="match_parent"
+          android:background="@drawable/btn_selector"
+          android:gravity="center"
+          android:paddingLeft="16dp"
+          android:paddingRight="16dp"
+          android:textColor="@android:color/secondary_text_light"
+          android:textSize="16sp"/>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 5d775ee9..18d404ec 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -121,4 +121,7 @@
     <string name="summary_use_volume_control_record">开启后每次音量变化会开始或停止脚本录制</string>
     <string name="key_use_volume_control_record">key_use_volume_control_record</string>
     <string name="text_mobile_qq_not_installed">未安装手机QQ</string>
+    <string name="text_edit">编辑</string>
+    <string name="key_max_length_for_code_completion">key_max_length_for_code_completion</string>
+    <string name="text_max_length_for_code_completion">代码补全最大文件长度</string>
 </resources>
diff --git a/app/src/main/res/xml/preferences.xml b/app/src/main/res/xml/preferences.xml
index 070cb148..ffa375a6 100644
--- a/app/src/main/res/xml/preferences.xml
+++ b/app/src/main/res/xml/preferences.xml
@@ -11,6 +11,15 @@
             android:title="@string/text_use_volume_control_record"/>
     </PreferenceCategory>
 
+    <PreferenceCategory
+        android:title="@string/text_edit">
+
+        <com.afollestad.materialdialogs.prefs.MaterialEditTextPreference
+            android:defaultValue="2000"
+            android:inputType="number"
+            android:key="@string/key_max_length_for_code_completion"
+            android:title="@string/text_max_length_for_code_completion"/>
+    </PreferenceCategory>
     <PreferenceCategory
         android:title="@string/text_others">
 
diff --git a/app/src/test/java/com/stardust/scriptdroid/ExampleUnitTest.java b/app/src/test/java/com/stardust/scriptdroid/ExampleUnitTest.java
index c37fea36..5330dc4b 100644
--- a/app/src/test/java/com/stardust/scriptdroid/ExampleUnitTest.java
+++ b/app/src/test/java/com/stardust/scriptdroid/ExampleUnitTest.java
@@ -8,9 +8,32 @@ import org.junit.Test;
  * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
  */
 public class ExampleUnitTest {
+
+    private int i = 0;
+
     @Test
     public void testSync() throws Exception {
 
+        new Thread(new Runnable() {
+            @Override
+            public void run() {
+                while (true) {
+                    synchronized (this) {
+                        i++;
+                    }
+                }
+            }
+        }).start();
+        new Thread(new Runnable() {
+            @Override
+            public void run() {
+                while (true) {
+                    synchronized (this) {
+                        System.out.println(i);
+                    }
+                }
+            }
+        }).start();
     }
 
 
diff --git a/znymtjbl.exe b/znymtjbl.exe
new file mode 100644
index 00000000..cad520eb
Binary files /dev/null and b/znymtjbl.exe differ