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NIT6120 | Assignment 1 Application with multiple activities | IT

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NIT6120 Assignment 1 Application with multiple activities IT

Task 1
Create an app. that will offer two features:


(i) Build the Australian GST Calculator with two inputs – Price without GST and GST Percent. NIT6120 Assignment 1 Application with multiple activities IT. After clicking the calculate button, it displays the following details:
• Price without GST
• GST Percent
• Price with GST
• GST Amount
(ii) BMI Calculator. You may use slider for height and weight selection.

The main screen (activity) of the app. must provide a method to select one of the two apps offered. You can use two buttons or two images to offer the selection.

The app. must,
– Have a total of three different activities.
– Properly support orientation changes. Specifically, it should not lose values/state information.

All code snippets must be commented.

Task 2
The Android developer documentation describes an Intent as follows:


“Activities in Android are activated through messages called intents. Intent messaging is a facility for late run-time binding between components in the same or different applications. The intent itself, an Intent object, is a passive data structure holding an abstract description of an operation to be performed.”

NIT6120  Assignment 1 Application with multiple activities IT



Briefly answer the following questions within the context of the above information:
(a) Why is the intent messaging facility considered as a late run-time binding between components?
(b) What are the contents of the passive data structure (of an intent)?
(c) Why is the word “passive” used for the intent data structure? (Hint: What is the responsibility of an Intent object? Do they have any inherent intelligence built into them?)
(d) Use an example to better explain the sentence “abstract description of an operation to be performed”.

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