Question

当我选中复选框时，应用程序崩溃了，否则程序会运行

XML：

        <CheckBox
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/whippedCreamTopping"
            android:onClick="onCheckboxClicked"
            />

Java：

    //This method is called when the order button is clicked.
    public void submitOrder(View view) {
        CheckBox whippedCreamCheckBox = (CheckBox) findViewById(R.id.whippedCreamTopping);
        boolean hasWhippedCream = whippedCreamCheckBox.isChecked();    
        int price = calculatePrice();
        String priceMessage = createOrderSummary(price, hasWhippedCream);
        displayMessage(priceMessage);   

    }


    //displays the given quantity value on the screen.
    private void displayQuantity(int number) {
        TextView quantityTextView = (TextView) findViewById(R.id.quantity_text_view);
        quantityTextView.setText("" + number);
    }

    //Calculates the price of the order.
    private int calculatePrice() {
        return quantity * price;
    }

    //Add in a summary
        private String createOrderSummary(int price, boolean addWCream) {
        double priceTotal = calculatePrice();  
        String myName = "JJ Jobs";
        String priceString = "Name: " + myName;
        priceString += "\nAdd Whipped Cream?" + addWCream;
        priceString += "\nQuantity: " + quantity + "\nTotal: $" + priceTotal;
        priceString += "\nThank you";
        return priceString;
    } //end of createOrderSummary

我试过How to check if android checkbox is checked within its onClick method (declared in XML)? 但我没有得到代码（复选框工作）

Answer 1

我在XML代码中发现了问题：

    <CheckBox
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/whippedCreamTopping"

        android:onClick="onCheckboxClicked"  *I removed this line of code 
                                             *then it worked
        />

感谢您的所有帮助

选中CheckBox时Android Studio App崩溃

1 个答案: