add: LICENSE, ui mode

app/src/main/assets/sample_simple_calculator.js

@@ -1,7 +1,17 @@
+"ui";
 
 importClass("com.afollestad.materialdialogs.MaterialDialog.Builder");
+importClass("com.afollestad.materialdialogs.MaterialDialog.InputCallback");
+importClass("android.content.DialogInterface.OnDismissListener");
 
-new Builder(context)
-    .title("请输入算式")
-    .content("测试")
+new Builder(activity)
+    .title("简单计算器")
+    .input("请输入算式", "1+1", new InputCallback(function(dialog, input){
+        eval("var ans = (" + input + ")");
+        toast(ans);
+    }))
+    .positiveText("计算")
+    .dismissListener(new OnDismissListener(function(dialog){
+        activity.finish();
+    }))
     .show();