Question

Tip Calculator App

For this project, you will create a tip calculator Android app. The user should enter their bill amount into

an EditText and then select the desired tip percentage using a SeekBar. When the user moves the

SeekBar’s dial, the tip amount and total amount are displayed in separate TextViews below.

Your Tip Calculator App should very closely resemble the one shown here:

Widgets

• At the top of the app, include a TextView that contains your name and “CSCI 112”.

• Bill Amount

o Include a TextView that reads “Bill Amount:” and an EditText (numberDecimal) to the

right of it. The EditText should be blank.

• Tip Percentage

o Include a TextView that reads “Tip Percentage:”

o Include a TextView that reads “30%”

o Include a SeekBar with a maximum value of 100. Its starting value must be 30.

• Tip and Total Amounts

o Include a TextView that reads “Tip Amount” and a TextView to its right that reads

“$0.00”

o Include a TextView that reads “Tip Amount” and a TextView to its right that reads

“$0.00”

The SeekBar

• When the SeekBar is moved by the user, it must:

o Update the percentage displayed.

o Update the tip dollar amount. (bill amount * (slider’s value / 100))

o Update the total dollar amount. (bill amount + tip amount)

o Both dollar amounts should be formatted to two decimal places.

To format a double to two decimal places (String.format() returns a String):

String.format(".2f", doubleOrFloatVariable);

(Concatenated with a “$”):

String formatted = "$" + String.format(".2f", doubleOrFloatVariable);