diff --git a/autojs/src/main/assets/modules/__app__.js b/autojs/src/main/assets/modules/__app__.js
index 355b1784..f0b16fb2 100644
--- a/autojs/src/main/assets/modules/__app__.js
+++ b/autojs/src/main/assets/modules/__app__.js
@@ -65,7 +65,7 @@ module.exports = function(runtime, global){
 
     app.sendEmail = function(options){
         options = options || {};
-        var i = new Intent(Intent.ACTION_SENDTO);
+        var i = new Intent(Intent.ACTION_SEND);
         if(options.email){
             i.putExtra(Intent.EXTRA_EMAIL, toArray(options.email));
         }
@@ -84,21 +84,26 @@ module.exports = function(runtime, global){
         if(options.attachment){
             i.putExtra(Intent.EXTRA_STREAM, android.content.Uri.parse("file://" + options.attachment));
         }
+        i.setType("message/rfc822");
         context.startActivity(Intent.createChooser(i, "发送邮件").addFlags(Intent.FLAG_ACTIVITY_NEW_TASK));
     }
 
+    function toArray(arg){
+        if(typeof(arg) == 'string'){
+            arg = [arg];
+        }
+        let arr = util.java.array("string", arg.length);
+        for(let i = 0; i < arg.length; i++){
+            arr[i] = arg;
+        }
+        return arr;
+    }
+
     app.getUriForFile = function(file){
         return android.support.v4.content.FileProvider.getUriForFile(context,
             "org.autojs.autojs.fileprovider", new java.io.File(files.path(path)));
     };
 
-    function toArray(arg){
-        if(typeof(arg) == 'string'){
-            return [arg];
-        }
-        return arg;
-    }
-
     app.launch = app.launchPackage;
 
     app.versionCode = context.getPackageManager().getPackageInfo(context.getPackageName(), 0).versionCode;
diff --git a/autojs/src/main/assets/modules/__java_util__.js b/autojs/src/main/assets/modules/__java_util__.js
index 3e906fb2..12f79d24 100644
--- a/autojs/src/main/assets/modules/__java_util__.js
+++ b/autojs/src/main/assets/modules/__java_util__.js
@@ -8,15 +8,18 @@ function typeToClass(type) {
     if (typeof(type) != 'string') {
         return type;
     }
+    if(type == 'string'){
+        return java.lang.String;
+    }
     var types = {
         "int": "Integer",
         "long": "Long",
-        "string": "String",
         "double": "Double",
         "char": "Character",
         "byte": "Byte",
         "float": "Float"
     };
+
     if (types[type]) {
         return Packages["java.lang." + types[type]].TYPE;
     }