Stop decrementing to negative values when the value of a variable becomes zero

Issue

This below code has Two values increment and decrement which are hooked to buttons in XML

int quantity = 0;;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_trial_order);
}

public void increment(View view){
   quantity = quantity + 1;
    display(quantity);
}
public void decrement(View view){
    quantity = quantity - 1;
    display(quantity);
}

and increment works fine,decrement works fine too but when I press decrement it goes in 0,-1,-2,-3 and so on but I want 0 to be the final value when I use decrement button kindly help

Solution

Check after decreasing if the value of quantity is getting lower than 0 and set it accordingly:

Example:

public void decrement(View view){
    quantity--;
    if(quantity<0){
         quantity=0;  
    }
    display(quantity);
}

Answered By - ΦXocę 웃 Пepeúpa ツ