Attributes, Methods and Events for TextView, EditText and Button

TextView: Displays text to the user and optionally allows them to edit it.

EditText: EditText is a thin veneer over TextView that configures itself to be editable.

Button: Represents a push-button widget. Push-buttons can be pressed, or clicked, by the user to perform an action. 

XML Attributes & related Methods

Attribute Name	Related Method	Description
android:ems	setEms(int)	Makes the TextView be exactly this many ems wide. An em is a unit of measurement in the field of typography, equal to the currently specified point size.
android:gravity	setGravity(int)	Specifies how to align the text by the view's x- and/or y-axis when the text is smaller than the view.
android:height	setHeight(int)	Makes the TextView be exactly this many pixels tall.
android:hint	setHint(int)	Hint text to display when the text is empty.
android:lines	setLines(int)	Makes the TextView be exactly this many lines tall.
android:password	setTransformationMethod(TransformationMethod)	Whether the characters of the field are displayed as password dots instead of themselves.
android:text	setText(CharSequence)	Text to display.
android:textSize	setTextSize(int, float)	Size of the text.
android:textStyle	setTypeface(Typeface)	Style (bold, italic, bolditalic) for the text.
android:width	setWidth(int)	Makes the TextView be exactly this many pixels wide.

 

Note: attributes and methods are common for TextView, Edit Text and Button

Events

Void OnTextChanged (CharSequence text, int start, int lengthBefore, int lengthAfter)

This method is called when the text is changed, in case any subclasses would like to know.

Boolean onGenericMotionEvent(MotionEvent event) 

Implement this method to handle generic motion event
 
setOnClickListerner(OnClickListener) 
Event occurs after clicking on button.