nativescript - How to use nativescript javascript extend?

Question

I follow this guide to inherit a class, but i get crash with dalvik.system.NativeStart.main(native method) error

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

根据 Android 文档（http://developer.android.com/reference/android/widget/DatePicker.html） DatePicker 构造函数至少需要一个参数（上下文）。尝试传递它，例如

var foo = new MyDatePicker(context);