MODULE 4

Question 1

Lifecycle:

Answer 1

The way Android apps interact with Android OS

Question 2

_____ help with knowing where to put java code depending on the objective

Answer 2

Phases of the lifecycle

Question 3

Android applications start with _____

Answer 3

a series of callback methods

Question 4

Activity:

Answer 4

A screen of an app’s interface

Question 5

_____ decides how an app is viewed by a user

Answer 5

Current phase

Question 6

Android lifecycle phases:

Answer 6

• Being created
• Starting
• Resuming
• Running
• Pausing
• Stopping
• Being destroyed

Question 7

onResume:

Answer 7

Reloads saved data from when the app was interrupted

Question 7

onCreate:

Answer 7

Declares the UI to setContentView, graphics, and sound

Question 8

onStart:

Answer 8

Makes the activity visible and initializes the code that maintains the UI

Question 9

onPause:

Answer 9

Saves data when device goes to sleep or user about to switch to another app

Question 10

onStop:

Answer 10

Releases resources when another app is started

Question 11

onDestroy:

Answer 11

Removes app from memory

Question 12

Solution to lifecycle method complexity:

Answer 12

1. Set up app in onCreate
2. Load data in onResume
3. Save data in onPause
4. Tidy up app in onDestroy

Question 13

_____ Loads the menu from menu_main.xml

Answer 13

onCreateOptionsMenu

Question 14

_____ Directs execution to item selected

Answer 14

onOptionsItemSelected

Question 15

Structure of Java code:

Answer 15

• Package
• Classes
• Methods

Question 16

_____ is a container for user defined code

Answer 16

Package

Question 17

_____ are the building blocks of code

Answer 17

Classes

Question 18

_____ wrap functional code

Answer 18

Methods

Question 19

_____ handle navigation between screens

Answer 19

Fragments

Question 20

_____ are sub-activities

Answer 20

Fragments

Question 21

_____ are multiple screens in an activity

Answer 21

Fragments