Android How to Program

7. Cannon Game App

Objectives

In this chapter you’ll:

• Create a simple game app that’s easy to code and fun to play.

• Create a custom SurfaceView subclass and use it to display the game’s graphics from a separate thread of execution.

• Draw graphics using Paints and a Canvas.

• Play sounds in respone to various game events.

• Manually perform frame-by-frame animations using a game loop that accounts for varying frame rates across devices.

• Override Activity’s onTouchEvent to process touch events when the user touches the screen or drags a finger on the screen.

• Use a GestureDetector to recognize more sophisticated user touch motions, such as double taps.

• Perform simple collision detection.

• Add sound to your app using a SoundPool and the ...