初始化数量

Question

我希望当我的应用程序启动时，它显示2作为初始数量。它总是显示0.我应该怎么做？

/** 
* This method is called when the order button is clicked. 
*/ 
public void submitOrder(View view) { 
    int quantity = 2; 

    displayPrice (quantity * 5); 
} 



/** 
* This method is called when plus button is clicked. 
*/ 

public void increment(View view) { 
    int quantity = 2; 
    quantity = quantity + 1; 

    display(quantity); 

} 
/** 
* This method is called when minus button is clicked. 
*/ 
public void decrement(View view) { 
    int quantity = 1; 
    display (quantity); 
} 

Answer 1

你既可以在活动的onCreate方法调用display(2);或编辑XML布局，使您的quantitiy的TextView的值是默认值为2。