如何使用nativescript javascript extend？

Question

我按照這個guide繼承一個類，但我得到的碰撞與dalvik.system.NativeStart.main(native method)錯誤

var MyDatePicker = android.widget.DatePicker.extend({ 
    init: function() { 
     var isConstructor = arguments[arguments.length - 1]; 
     if (isConstructor) { 
      // we are called from Java constructor 
      console.log('con') 
     } else { 
      // we are called from Java init method 
      console.log('init'); 
     } 
    } 
}); 

var foo = new MyDatePicker(); 

Answer 1

根據Android文檔（http://developer.android.com/reference/android/widget/DatePicker.html）DatePicker的構造需要至少一個參數（上下文）。嘗試通過它，例如

var foo = new MyDatePicker（context）;