Android_Kotlin

Question 1

Creating Virtual Device

Answer 1

1. Phone - options
2. Select - with/without Play store (icon)
3. Select API
4. Press Play!

Question 2

Details & Advanced options

Answer 2

Right side - panel. On the AVD

Question 3

.kt

Answer 3

stands for Kotlin

Question 4

Start of program?

Answer 4

MainActivity

Question 5

User functions?

Answer 5

Called by ourself

Question 6

Packages define

Answer 6

Adding outside Code - to our project

Question 7

AppCompatActivity

Answer 7

Contains lots of Code - to reuse.

Makes sure App works nicely on different devices

Question 8

onCreate

Answer 8

Comes from Bundle package

Question 9

When does the GUI start showing?

Answer 9

setContentView(R.layout.activity_main)

Question 10

R stands for?

Answer 10

Resources

Question 11

Layout?

Answer 11

Layout - folder

Question 12

What displays on the Screen?

Answer 12

activity_main

Question 13

Declared Attributes?

Answer 13

Left side

Question 14

SP (units) defined?

Answer 14

Scaled Independent Pixels

Scale to size of Screen

Question 15

Gradle building

Answer 15

Compiling code into App

Question 16

View is not constrained, fix?

Answer 16

Item (GUI) needs to relate to other elements. Else forced to (0,0) cordinates

Question 17

R.id

Answer 17

Reference to the element by Id

Question 18

Simple button click Example

Answer 18

val buttonMe = findViewById(R.id.button) as Button

Question 19

Element that needs to be Imported

Answer 19

Right click - Import Widget

Question 20

How to acquire element data

Answer 20

findViewById( )

Question 21

Button onclick listener

Answer 21

.setOnClickListener( )

Question 22

Small text at bottom (Toast Widget)

Answer 22

toast.makeText(context: this@MainActivity, text: “Hello”, Toast.LENGTH_SHORT)

Question 23

Text view

Answer 23

findViewById(R.id.textView) as TextView