04 layout design and basic widget
TRANSCRIPT
Layout DesignAnuchit [email protected]
Layout design
Android has 3 basic layout design LinearLayout (horizontal, vertical), Relativelayout and ConstraintLayout.
Codelab: Layout design
Create new activities with 2 widget TextView and Button in LinearLayout (horizontal, vertical), Relativelayout and ConstraintLayout.
LinearLayout Horizontal
LinearLayout Vertical
RelativeLayout Vertical
ConstraintLayout Vertical
TextView
Attribute
● android:textColor="#33333"
● android:text="Hello World"
● android:textSize="30sp"
Methods
● getText
● setText
● setTypeFace
EditText
XML Attribute
● android:inputType="text"
Methods
● getText
● setText
EditText : inputType
● text
● textPersonName
● textPassword
● numberPassword
● textEmailAddress
● phone
● textPostalAddress
● textMultiLine
● time
● date
● number
● numberSigned
● numberDecimal
Button
XML Attribute
● android:style="?android:attr/buttonStyleSmall
● android:text="Button"
Methods
● setOnClickListener
Checkbox
Methods
● isChecked● setChecked(true)● setOnClickListener
Radiobutton
Use with RadioGroup widget, methods
● isChecked● Toggle● setOnClickListener
Toggle Button
XML Attribute
● android:textOn="Vibrate on"● android:textOff="Vibrate off"
Methods
● setOnCheckedChangeListener
Codelab: Calculator app layout
Use button and textview to create calculator app and change button id prepare for next codelab
Codelab: Layout design with widget
Create basic form with widget, choose your own layout design.
