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关注NativeScript有一段时间了，说好了的三月发第一个Beta版，终于发布了。

// declare the extended NativeScriptActivity functionality
var extendsObject = {
    onCreate: function(savedState){
        // call the base NativeScriptActivity.onCreate method
        // the "this" variable points to a NativeScriptActivity instance
        this.super.onCreate(savedState);

        // create a button and set it as the main content
        var button = new android.widget.Button(this);
        button.setText("Hello World");

        this.setContentView(button);
    }
}

// pass the extends object to create a new NativeScriptActivity instance
var mainActivity = com.tns.NativeScriptActivity.extends(extendsObject);

var applicationInitObject = {
    getActivity: function(intent) {
        // this method is called whenever a new instance of NativeScriptActivity is about to be created
        return mainActivity;
    },
    onCreate: function() {
        // This is the first method called. Called from the android.app.Application.onCreate method.
    } 
}

// The NativeScriptRuntime exposes the app object within the global context
app.init(applicationInitObject);

如上面代码，用javascript创那建一个Android的Activity，是不是很炫酷！

当然也可以写iOS native应用，这还不是最炫酷的，更炫酷的是，它还提供了一套“公共的”api,和一套可以用xml描述的ui控件库，可以这样定义界面，并在不同的平台下生成相应用本地控件。

<Page xmlns="http://www.nativescript.org/tns.xsd" loaded="pageLoaded">
  <StackLayout>
    <Label text="Tap the button" cssClass="title"/>
    <Button text="TAP" tap="{{ tapAction }}" />
    <Label text="{{ message }}" cssClass="message" textWrap="true"/>
    <Button text="test button"/>
  </StackLayout>
</Page>

它还支持“数据绑定”，这你敢信？！

上样例：