Revision - Widget

Question 1

How to push the screen to the new SecondPage() screen?

Answer 1

Navigator.push(
context,
MaterialPageRoute(builder: (context) => SecondPage())
);

Question 2

How to place a Text (“Hello”) in the center?

Answer 2

return Scaffold(
body: Center(
child: Text("Hello"),
),
);

Omit full StatelessWidget code

Question 3

Create a text widget with Font Size set to 20, and Bold

Answer 3

Text("Hello", style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold))

Question 4

How to grey out the button in Flutter?

Answer 4

Add null value to the button’s onPressed parameter

Question 5

List out the 3 important parameters for Scaffold

Answer 5

1. appBar
2. body
3. floatingActionButton

Question 6

List out the 3 important parameters for AppBar

Answer 6

1. title
2. leading
3. actions

Question 7

List out the 5 important parameters for MaterialApp

Answer 7

1. home
2. title
3. theme
4. initialRoute
5. routes

Question 8

List out the 3 important parameters for Column and Row

Answer 8

1. children
2. mainAxisAlignment
3. crossAxisAlignment

Stacks widgets vertically / horizontally

Question 9

List out the important parameters for Container

Answer 9

1. child
2. color
3. padding
4. margin
5. decoration

Question 10

List out the important parameter for Center

Answer 10

1. child

Question 11

List out 2 important parameters for Padding

Answer 11

1. padding
2. child

Question 12

Usually what objects is needed for padding parameter?

Answer 12

EdgeInsects class

Question 13

List out 3 important parameters for SizedBox

Answer 13

1. width
2. height
3. child

Question 14

List out the important parameters for TextStyle (Used inside Text)

Answer 14

1. fontSize
2. fontWeight
3. color

Question 15

List out the 3 important parameters for TextField

Answer 15

1. controller (TextEditingController)
2. decoration (InputDecoration)
3. obscureText (for passwords)

Question 16

What is the difference between onPressed and onTap?

Answer 16

1. onPressed is for Buttons (Material widget that has the word Button)
2. onTap is for Detectors, non-clickable widget (Container, Image, InkWell)

Question 17

List out 2 key parameter for
1. ElevatedButton
2. FilledButton
3. TextButton

Answer 17

1. onPressed
2. child

1. Has a solid background and Drop Shadow
2. Has a solid background and No Shadow
3. No Background, No Shadow, Just Text

Question 18

List out 2 key parameter for IconButton

Answer 18

1. onPressed
2. icon

Question 19

List out important parameters for Input Decoration

Answer 19

1. labelText
2. hintText
3. border
4. prefixIcon