New method in MainActivity.java

/**
 * This method displays the given price on the screen.
 */
private void displayPrice(int number) {
       TextView priceTextView = (TextView) findViewById(R.id.price_text_view);
       priceTextView.setText(NumberFormat.getCurrencyInstance().format(number));
}

error: invalid method declaration; return type required
} displayPrice(2*5);
^

don't why my app is crashing after clicking on the ORDER button

How do I resolve this error?

Code of [chetan081] approach

private void displayPrice(int number) {
TextView priceTextView = (TextView) findViewById(R.id.price);
priceTextView.setText("₹ "+ number);
}

How do i resolve this error

After latest update of Android studio it should be this code in Kotlin:

/**
* This method displays the given price on the screen.
*/
private fun displayPrice(number: Int) {
val priceTextView = findViewById(com.example.justjava.R.id.price_text_view) as TextView
priceTextView.setText(java.text.NumberFormat.getCurrencyInstance().format(number))
}

Code segment works fine the problem is that the emulator got crushed every time after running the program:
private void displayPrice(int number) {
TextView priceTextView = (TextView) findViewById(R.id.price_text_view);
priceTextView.setText(NumberFormat.getCurrencyInstance().format(number));
}

i have problem is my java code how can i correct since i am new for the code

For all of those who are trying to get currency in their locale this will help

The lines of code you see below is exactly the same as display method the one you see in quantity_text_view

private void displayPrice(int number) { TextView priceTextView = (TextView) findViewById(R.id.price_text_view); priceTextView.setText(NumberFormat.getCurrencyInstance().format(number)); }

The major difference here is this line priceTextView.setText(NumberFormat.getCurrencyInstance().format(number));

Now what exactly this line of code does is,it's adding the currecy symbol to your calculation like this $10.00

This whole line is just to get currency sign **(NumberFormat.getCurrencyInstance().format()

Now to change currency to your locale there are two ways:

Easy Way

1. priceTextView.setText("₹"+number);

In this you provide your currency symbol directly inside these "" marks

This line is exactly same as one you see in display method but here your adding your currency sign to the number

In this way you don't get decimal numbers what i mean is you get like this ₹10 instead of this ₹10.00

Udacity Way

2. Like i said above

This whole line is just to get currency sign (NumberFormat.getCurrencyInstance().format(number).

All we have to do is change it to your local like this

priceTextView.setText(NumberFormat.getCurrencyInstance(new Locale("en","IN")).format(number));

Above i've added this new Locale("en","IN") new line inside of getCurrencyInstance()

By adding that line we are saying i want the currency to be in other local instead of default one with this new Locale()

Now we need to tell in what local we want the currency to be.

We say that by adding these "en" , "in"

• "en" -This is language and i want it to be in ENGLISH.
• "IN" -This is country since i'm INDIAN i say "IN"

HOPE THIS WILL HELP , THANK YOU!

Thank you! It works.

it dos't work this cod how can fix this