Introduction to Canvas
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Introduction to Canvas - Presentation Transcript
- Android: Canvas The Basics
CodeAndroid.org - Why Canvas?
For Multimedia Applications- Games, full visual applications
- Control over the Visual Effects
- Allows animation to be done freely
- Unique Response according to author’s design
- No longer Needed
- Fundamentals
- Drawing an image(basic)
Specify the coordinate and paint
Coordinate X and Y and paint
Paint functions
Color
Alpha(transparent)
http://developer.android.com/reference/android/graphics/Paint.html
Canvas itself
Color(background) - Drawing shape and text
- Adding Bitmap
- Text Size and alpha
- Response
onKeyDown(int, KeyEvent)
onKeyUp(int, KeyEvent)
onTrackballEvent(int, KeyEvent)
onTouchEvent(int, KeyEvent) - Question and Sharing
- Thank you
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