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Last active February 6, 2023 14:25
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Android for Beginners : Negative Number of Cups of Coffee Extra Challenge Solution
/**
* This method is called when the plus button is clicked.
*/
public void increment(View view) {
if (quantity == 100) {
// Show an error message as a toast
Toast.makeText(this, "You cannot have more than 100 coffees", Toast.LENGTH_SHORT).show();
// Exit this method early because there's nothing left to do
return;
}
quantity = quantity + 1;
displayQuantity(quantity);
}
/**
* This method is called when the minus button is clicked.
*/
public void decrement(View view) {
if (quantity == 1) {
// Show an error message as a toast
Toast.makeText(this, "You cannot have less than 1 coffee", Toast.LENGTH_SHORT).show();
// Exit this method early because there's nothing left to do
return;
}
quantity = quantity - 1;
displayQuantity(quantity);
}
@eng4flo
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eng4flo commented Oct 13, 2020

Hi ...
@RandomYogi has been noticed that quantity become "0" when rotate the phone ... seems that the class MainActivity re-create... can anyone explain the reason.. to try to avoid that

thanx

Isnt quantity set to 0?? If so... if you start to click decrement when app is just started it would be doing -1....or?

Hi, I think that will work well
//AS quantity =2
// increase quantity by 1
public void increment(View view) {

    if (quantity == 100) {
        quantity = 100;
        Toast toast = Toast.makeText(context, "It isn't available, Try again", Toast.LENGTH_SHORT);
        toast.show();
             } else {
        quantity = quantity + 1;
    }
    display(quantity);
}

// decrease quantity by 1
public void decrement(View view) {


    if (quantity == 1) {
        quantity = 1;
        Toast.makeText(this, "You cannot have less than 1 coffee", Toast.LENGTH_SHORT).show();
    } else {
        quantity -= 1;
    }
    display(quantity);
}

@mixspark
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nice code

@sudhir72350999
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nice this is nice lecture

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