diff --git a/app/src/main/java/com/stardust/scriptdroid/App.java b/app/src/main/java/com/stardust/scriptdroid/App.java
index ecc16c62..fece1814 100644
--- a/app/src/main/java/com/stardust/scriptdroid/App.java
+++ b/app/src/main/java/com/stardust/scriptdroid/App.java
@@ -69,8 +69,7 @@ public class App extends MultiDexApplication {
             return;
         }
         LeakCanary.install(this);
-        if (!BuildConfig.DEBUG)
-            Thread.setDefaultUncaughtExceptionHandler(new CrashHandler(ErrorReportActivity.class));
+        Thread.setDefaultUncaughtExceptionHandler(new CrashHandler(ErrorReportActivity.class));
     }
 
     private void init() {
diff --git a/app/src/main/java/com/stardust/scriptdroid/tool/CrashHandler.java b/app/src/main/java/com/stardust/scriptdroid/tool/CrashHandler.java
index 637e24c5..3046363e 100644
--- a/app/src/main/java/com/stardust/scriptdroid/tool/CrashHandler.java
+++ b/app/src/main/java/com/stardust/scriptdroid/tool/CrashHandler.java
@@ -12,6 +12,7 @@ import android.view.WindowManager;
 import android.widget.Toast;
 
 import com.stardust.scriptdroid.App;
+import com.stardust.scriptdroid.BuildConfig;
 import com.stardust.scriptdroid.R;
 import com.stardust.util.IntentUtil;
 import com.stardust.view.accessibility.AccessibilityService;
@@ -25,32 +26,37 @@ public class CrashHandler implements UncaughtExceptionHandler {
     private static int crashCount = 0;
     private static long firstCrashMillis = 0;
     private final Class<?> mErrorReportClass;
+    private UncaughtExceptionHandler mDefaultHandler;
 
     public CrashHandler(Class<?> errorReportClass) {
         this.mErrorReportClass = errorReportClass;
+        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
     }
 
     public void uncaughtException(Thread thread, Throwable ex) {
+        AccessibilityService service = AccessibilityService.getInstance();
+        if (service != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+            service.disableSelf();
+        }
+        if(BuildConfig.DEBUG){
+            mDefaultHandler.uncaughtException(thread, ex);
+            return;
+        }
         if (causedByBadWindowToken(ex)) {
             Toast.makeText(App.getApp(), R.string.text_no_floating_window_permission, Toast.LENGTH_SHORT).show();
             IntentUtil.goToAppDetailSettings(App.getApp());
-            return;
-        }
-        try {
-            Log.e(TAG, "Uncaught Exception", ex);
-            AccessibilityService service = AccessibilityService.getInstance();
-            if (service != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
-                service.disableSelf();
+        }else {
+            try {
+                Log.e(TAG, "Uncaught Exception", ex);
+                if (crashTooManyTimes())
+                    return;
+                String msg = App.getApp().getString(R.string.sorry_for_crash) + ex.toString();
+                startErrorReportActivity(msg, throwableToString(ex));
+                System.exit(1);
+            } catch (Throwable throwable) {
+                throwable.printStackTrace();
             }
-            if (crashTooManyTimes())
-                return;
-            String msg = App.getApp().getString(R.string.sorry_for_crash) + ex.toString();
-            startErrorReportActivity(msg, throwableToString(ex));
-            System.exit(0);
-        } catch (Throwable throwable) {
-            throwable.printStackTrace();
         }
-
     }
 
     private static boolean causedByBadWindowToken(Throwable e) {
diff --git a/autojs/src/main/assets/init.js b/autojs/src/main/assets/init.js
index e86b6e00..8fb3dcff 100644
--- a/autojs/src/main/assets/init.js
+++ b/autojs/src/main/assets/init.js
@@ -10,10 +10,6 @@ var importClass = function(pack){
     }
 }
 
-var loadJar = function(path){
-    __runtime__.loadJar(path);
-}
-
 __runtime__.bridges.setBridges({
     call: function(func, target, args){
        var arr = [];
@@ -59,7 +55,24 @@ var __asGlobal__ = function(obj, functions){
     }
 }
 
-require("__general__")(__runtime__, this);
+var __exitIfError__ = function(action, defReturnValue){
+    try{
+       return action();
+    }catch(err){
+        log(err.toString());
+        if(err instanceof java.lang.Throwable){
+            exit(err);
+        }else if(err instanceof Error){
+            exit(new org.mozilla.javascript.EvaluatorException(err.name + ": " + err.message, err.fileName, err.lineNumber));
+            //new java.lang.RuntimeException(err.name + ": " + err.message + "\n" + err.stack));
+        }else{
+            exit();
+        }
+        return defReturnValue;
+    }
+};
+
+require("__globals__")(__runtime__, this);
 
 
 (function(scope){
diff --git a/autojs/src/main/assets/modules/__general__.js b/autojs/src/main/assets/modules/__globals__.js
similarity index 96%
rename from autojs/src/main/assets/modules/__general__.js
rename to autojs/src/main/assets/modules/__globals__.js
index 0251b975..5e17e93f 100644
--- a/autojs/src/main/assets/modules/__general__.js
+++ b/autojs/src/main/assets/modules/__globals__.js
@@ -23,9 +23,8 @@ module.exports = function(__runtime__, scope){
 
     scope.isRunning = scope.notStopped;
 
-    scope.exit = function(){
-        __runtime__.exit();
-    }
+    scope.exit = __runtime__.exit.bind(__runtime__);
+
 
     scope.stop = scope.exit;
 
diff --git a/autojs/src/main/assets/modules/__ui__.js b/autojs/src/main/assets/modules/__ui__.js
index 70cbe9b6..287e0e48 100644
--- a/autojs/src/main/assets/modules/__ui__.js
+++ b/autojs/src/main/assets/modules/__ui__.js
@@ -15,29 +15,47 @@ module.exports = function(__runtime__, scope){
         });
     }
 
-    ui.id = function(id){
+    ui.findById = function(id){
         if(!ui.view)
             return null;
-        var v = ui.findViewByStringId(ui.view.getChildAt(0), id);
+        var v = ui.findByStringId(ui.view.getChildAt(0), id);
         if(v){
             v = decorate(v);
         }
         return v;
     }
 
+    ui.isUiThread = function(){
+        importClass(android.os.Looper);
+        return Looper.myLooper() == Looper.getMainLooper();
+    }
+
     ui.run = function(action){
-        __runtime__.uiHandler.post(action);
-    }
-
-    ui.nonUi = function(action){
-        if(!ui.__executor__){
-            ui.__executor__ = java.util.concurrent.Executors.newSingleThreadExecutor();
+        if(ui.isUiThread()){
+            return action();
         }
-        ui.__executor__.submit(action);
+        var err = null;
+        var result;
+        var disposable = scope.threads.disposable();
+        __runtime__.uiHandler.post(function(){
+            try{
+                result = action();
+                disposable.setAndNotify(true);
+            }catch(e){
+                err = e;
+                disposable.setAndNotify(true);
+            }
+        });
+        disposable.blockedGet();
+        if(err){
+            throw err;
+        }
+        return result;
     }
 
-    ui.postDelay = function(action, delay){
-        __runtime__.getUiHandler().postDelay(action, delay);
+    ui.post = function(action, delay){
+        delay = delay || 0;
+        __runtime__.getUiHandler().postDelay(wrapUiAction(action), delay);
     }
 
     ui.statusBarColor = function(color){
@@ -57,33 +75,25 @@ module.exports = function(__runtime__, scope){
         });
     }
 
-    ui.findViewByStringId = function(view, id){
+    ui.findByStringId = function(view, id){
         return com.stardust.autojs.core.ui.JsViewHelper.findViewByStringId(view, id);
     }
 
     function decorate(view){
         var view = Object.create(view);
         view._id = function(id){
-            return ui.findViewByStringId(view, id);
+            return ui.findByStringId(view, id);
         }
         view.click = function(listener){
             if(listener){
-                view.setOnClickListener(new android.view.View.OnClickListener(listener));
+                view.setOnClickListener(new android.view.View.OnClickListener(wrapUiAction(listener)));
             }else{
                 view.performClick();
             }
         }
         view.longClick = function(listener){
             if(listener){
-                view.setOnLongClickListener(new android.view.View.OnLongClickListener(function(view){
-                     try{
-                        var r = listener(view);
-                        return !!r;
-                     }catch(e){
-                        console.error(e.getMessage());
-                        return false;
-                     }
-                }));
+                view.setOnLongClickListener(wrapUiAction(listener, false));
             }else{
                 view.performLongClick();
             }
@@ -93,6 +103,15 @@ module.exports = function(__runtime__, scope){
 
     ui.__decorate__ = decorate;
 
+    function wrapUiAction(action, defReturnValue){
+        if(typeof(activity)  != 'undefined'){
+            return function(){return action();};
+        }
+        return function(){
+            return __exitIfError__(action, defReturnValue);
+        }
+    }
+
     var proxy = __runtime__.ui;
     proxy.__proxy__ = {
         set: function(name, value){
@@ -104,7 +123,7 @@ module.exports = function(__runtime__, scope){
                if(cacheView){
                    return cacheView;
                }
-               cacheView = ui.id(name);
+               cacheView = ui.findById(name);
                if(cacheView){
                    ui.__view_cache__[name] = cacheView;
                    return cacheView;
diff --git a/autojs/src/main/java/com/stardust/autojs/core/ui/inflater/util/Drawables.java b/autojs/src/main/java/com/stardust/autojs/core/ui/inflater/util/Drawables.java
index e9f9c819..6c45a79d 100644
--- a/autojs/src/main/java/com/stardust/autojs/core/ui/inflater/util/Drawables.java
+++ b/autojs/src/main/java/com/stardust/autojs/core/ui/inflater/util/Drawables.java
@@ -110,7 +110,7 @@ public class Drawables {
         } else if(value.startsWith("data:")) {
             loadDataInto(view, value);
         }else {
-            view.setImageDrawable(com.stardust.autojs.core.ui.inflater.util.Drawables.parse(view, value));
+            view.setImageDrawable(Drawables.parse(view, value));
         }
     }
 
diff --git a/autojs/src/main/java/com/stardust/autojs/engine/RhinoJavaScriptEngine.java b/autojs/src/main/java/com/stardust/autojs/engine/RhinoJavaScriptEngine.java
index e8280977..eddfa6cf 100644
--- a/autojs/src/main/java/com/stardust/autojs/engine/RhinoJavaScriptEngine.java
+++ b/autojs/src/main/java/com/stardust/autojs/engine/RhinoJavaScriptEngine.java
@@ -4,9 +4,7 @@ import android.os.Looper;
 import android.util.Log;
 
 import com.stardust.autojs.BuildConfig;
-import com.stardust.autojs.execution.ScriptExecutionListener;
 import com.stardust.autojs.rhino.AndroidContextFactory;
-import com.stardust.autojs.rhino.RhinoAndroidHelper;
 import com.stardust.autojs.runtime.exception.ScriptInterruptedException;
 import com.stardust.autojs.script.JavaScriptSource;
 import com.stardust.autojs.script.StringScriptSource;
@@ -16,8 +14,6 @@ import com.stardust.pio.UncheckedIOException;
 
 import org.mozilla.javascript.Callable;
 import org.mozilla.javascript.Context;
-import org.mozilla.javascript.ContextFactory;
-import org.mozilla.javascript.ErrorReporter;
 import org.mozilla.javascript.ImporterTopLevel;
 import org.mozilla.javascript.Scriptable;
 import org.mozilla.javascript.ScriptableObject;
@@ -48,7 +44,7 @@ public class RhinoJavaScriptEngine extends JavaScriptEngine  {
     private Scriptable mScriptable;
     private Thread mThread;
     private android.content.Context mAndroidContext;
-    private Thread.UncaughtExceptionHandler mUiThreadExceptionHandler;
+    private Thread.UncaughtExceptionHandler mUncaughtExceptionHandler;
 
     public RhinoJavaScriptEngine(android.content.Context context) {
         mAndroidContext = context;
@@ -165,8 +161,12 @@ public class RhinoJavaScriptEngine extends JavaScriptEngine  {
         context.setWrapFactory(new WrapFactory());
     }
 
-    public void setUiThreadExceptionHandler(Thread.UncaughtExceptionHandler uiThreadExceptionHandler) {
-        mUiThreadExceptionHandler = uiThreadExceptionHandler;
+    public void setUncaughtExceptionHandler(Thread.UncaughtExceptionHandler uiThreadExceptionHandler) {
+        mUncaughtExceptionHandler = uiThreadExceptionHandler;
+    }
+
+    public Thread.UncaughtExceptionHandler getUncaughtExceptionHandler() {
+        return mUncaughtExceptionHandler;
     }
 
     private class WrapFactory extends org.mozilla.javascript.WrapFactory {
@@ -212,7 +212,7 @@ public class RhinoJavaScriptEngine extends JavaScriptEngine  {
                 try {
                     return super.doTopCall(callable, cx, scope, thisObj, args);
                 } catch (Exception e) {
-                    mUiThreadExceptionHandler.uncaughtException(Thread.currentThread(), e);
+                    mUncaughtExceptionHandler.uncaughtException(Thread.currentThread(), e);
                     return null;
                 }
             }
diff --git a/autojs/src/main/java/com/stardust/autojs/execution/LoopedBasedJavaScriptExecution.java b/autojs/src/main/java/com/stardust/autojs/execution/LoopedBasedJavaScriptExecution.java
index d9cacf31..4e643022 100644
--- a/autojs/src/main/java/com/stardust/autojs/execution/LoopedBasedJavaScriptExecution.java
+++ b/autojs/src/main/java/com/stardust/autojs/execution/LoopedBasedJavaScriptExecution.java
@@ -23,7 +23,7 @@ public class LoopedBasedJavaScriptExecution extends RunnableScriptExecution {
         long delay = getConfig().delay;
         sleep(delay);
         final LoopBasedJavaScriptEngine javaScriptEngine = (LoopBasedJavaScriptEngine) engine;
-        javaScriptEngine.setUiThreadExceptionHandler((t, e) -> {
+        javaScriptEngine.setUncaughtExceptionHandler((t, e) -> {
             javaScriptEngine.forceStop();
             getListener().onException(this, (Exception) e);
         });
diff --git a/autojs/src/main/java/com/stardust/autojs/execution/ScriptExecuteActivity.java b/autojs/src/main/java/com/stardust/autojs/execution/ScriptExecuteActivity.java
index a0caafc6..da45ea72 100644
--- a/autojs/src/main/java/com/stardust/autojs/execution/ScriptExecuteActivity.java
+++ b/autojs/src/main/java/com/stardust/autojs/execution/ScriptExecuteActivity.java
@@ -49,7 +49,7 @@ public class ScriptExecuteActivity extends AppCompatActivity implements Thread.U
         mScriptSource = mScriptExecution.getSource();
         mScriptEngine = mScriptExecution.getEngine();
         mExecutionListener = mScriptExecution.getListener();
-        ((RhinoJavaScriptEngine) mScriptEngine).setUiThreadExceptionHandler((t, e) -> onException((Exception) e));
+        ((RhinoJavaScriptEngine) mScriptEngine).setUncaughtExceptionHandler((t, e) -> onException((Exception) e));
         runScript();
     }
 
diff --git a/autojs/src/main/java/com/stardust/autojs/runtime/ScriptRuntime.java b/autojs/src/main/java/com/stardust/autojs/runtime/ScriptRuntime.java
index ec4ea76c..ce0a6f03 100644
--- a/autojs/src/main/java/com/stardust/autojs/runtime/ScriptRuntime.java
+++ b/autojs/src/main/java/com/stardust/autojs/runtime/ScriptRuntime.java
@@ -9,6 +9,7 @@ import com.stardust.autojs.ScriptEngineService;
 import com.stardust.autojs.annotation.ScriptVariable;
 import com.stardust.autojs.core.accessibility.AccessibilityBridge;
 import com.stardust.autojs.core.image.Colors;
+import com.stardust.autojs.engine.RhinoJavaScriptEngine;
 import com.stardust.autojs.engine.ScriptEngine;
 import com.stardust.autojs.rhino.AndroidClassLoader;
 import com.stardust.autojs.runtime.api.AbstractShell;
@@ -35,6 +36,7 @@ import com.stardust.lang.ThreadCompat;
 import com.stardust.pio.UncheckedIOException;
 import com.stardust.util.ClipboardUtil;
 import com.stardust.autojs.core.util.ProcessShell;
+import com.stardust.util.Objects;
 import com.stardust.util.ScreenMetrics;
 import com.stardust.util.SdkVersionUtil;
 import com.stardust.util.Supplier;
@@ -42,6 +44,7 @@ import com.stardust.util.UiHandler;
 import com.stardust.view.accessibility.AccessibilityInfoProvider;
 
 import org.mozilla.javascript.ContextFactory;
+import org.mozilla.javascript.RhinoException;
 
 import java.io.File;
 import java.io.IOException;
@@ -305,6 +308,25 @@ public class ScriptRuntime {
         }
     }
 
+    public void exit(Object obj) throws Throwable {
+        mThread.interrupt();
+        if (!(obj instanceof Throwable)) {
+            console.error(obj);
+            return;
+        }
+        Throwable e = (Exception) obj;
+        if (Looper.myLooper() != Looper.getMainLooper()) {
+            throw e;
+        } else {
+            Thread.UncaughtExceptionHandler handler = ((RhinoJavaScriptEngine) engines.myEngine()).getUncaughtExceptionHandler();
+            if (handler != null) {
+                handler.uncaughtException(Thread.currentThread(), e);
+            } else {
+                console.error(e);
+            }
+        }
+    }
+
     @Deprecated
     public void stop() {
         exit();
diff --git a/autojs/src/main/java/com/stardust/autojs/runtime/api/Floaty.java b/autojs/src/main/java/com/stardust/autojs/runtime/api/Floaty.java
index 0c54ee89..25d50589 100644
--- a/autojs/src/main/java/com/stardust/autojs/runtime/api/Floaty.java
+++ b/autojs/src/main/java/com/stardust/autojs/runtime/api/Floaty.java
@@ -20,6 +20,7 @@ import com.stardust.util.ViewUtil;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.Set;
+import java.util.concurrent.CopyOnWriteArraySet;
 
 /**
  * Created by Stardust on 2017/12/5.
@@ -30,7 +31,7 @@ public class Floaty {
     private JsLayoutInflater mJsLayoutInflater;
     private Context mContext;
     private UiHandler mUiHandler;
-    private Set<JsFloatyWindow> mWindows = new HashSet<>();
+    private Set<JsFloatyWindow> mWindows = new CopyOnWriteArraySet<>();
     private ScriptRuntime mRuntime;
 
     public Floaty(UiHandler uiHandler, UI ui, ScriptRuntime runtime) {