snakeysnake game $($learning jaba by building android games second edition$)$

In java and in android studio. Add a pause button to the game; clicking on it again resumes the game.

There is a SnakeGame, SnakeActivity, Snake and Apple class.

The full code is in picture

package com.gamecodeschool.c$17$snake;

class SnakeGame extends SurfaceView implements Runnable$\{$

$//$ Objects for the game loop$/$thread

private Thread mThread $=$ null;

$//$ Control pausing between updates

private long mNextFrameTime;

$//$ Is the game currently playing and or paused?

private volatile boolean mPlaying $=$ false;

private volatile boolean mPaused $=$ true;

$//$ for playing sound effects

private SoundPool mSP;

private int mEat$\_$ID $=-1$;

private int mCrashID $=-1$;

$//$ The size in segments of the playable area

private final int NUM$\_$BLOCKS$\_$WIDE $=40$;

private int mNumBlocksHigh;

$//$ How many points does the player have

private int mScore;

$//$ Objects for drawing

private Canvas mCanvas;

private SurfaceHolder mSurfaceHolder;

private Paint mPaint;

$//$ A snake ssss

private Snake mSnake;

$//$ And an apple

private Apple mApple;

$//$ This is the constructor method that gets called

$//$ from SnakeActivity

public SnakeGame$($Context context, Point size$)\{$

super$($context$)$;

$//$ Work out how many pixels each block is

int blockSize $=$ size.x $/$ NUM$\_$BLOCKS$\_$WIDE;

$//$ How many blocks of the same size will fit into the height

mNumBlocksHigh $=$ size.y $/$ blockSize;

$//$ Initialize the SoundPool

if $($Build$.$VERSION.SDK$\_$INT $>=$ Build.VERSION$\_$CODES.LOLLIPOP$)\{$

AudioAttributes audioAttributes $=$ new AudioAttributes.Builder$()$

$.$setUsage$($AudioAttributes$.$USAGE$\_$MEDIA$)$

$.$setContentType$($AudioAttributes$.$CONTENT$\_$TYPE$\_$SONIFICATION$)$

$.$build$()$;

mSP $=$ new SoundPool.Builder$()$

$.$setMaxStreams$(5)$

$.$setAudioAttributes$($audioAttributes$)$

$.$build$()$;

$\}$ else $\{$

mSP $=$ new SoundPool$(5,$ AudioManager.STREAM$\_$MUSIC, $0)$;

$\}$

try $\{$

AssetManager assetManager $=$ context.getAssets$()$;

AssetFileDescriptor descriptor;

$//$ Prepare the sounds in memory

descriptor $=$ assetManager.openFd$("$get$\_$apple.ogg"$)$;

mEat$\_$ID $=$ mSP$.$load$($descriptor$,0)$;

descriptor $=$ assetManager.openFd$("$snake$\_$death.ogg"$)$;

mCrashID $=$ mSP$.$load$($descriptor$,0)$;

$\}$ catch $($IOException e$)\{$

$//$ Error

$\}$

$//$ Initialize the drawing objects

mSurfaceHolder $=$ getHolder$()$;

mPaint $=$ new Paint$()$;

$//$ Call the constructors of our two game objects

mApple $=$ new Apple$($context$,$

new Point$($NUM$\_$BLOCKS$\_$WIDE,

mNumBlocksHigh$),$

blockSize$)$;

mSnake $=$ new Snake$($context$,$

new Point$($NUM$\_$BLOCKS$\_$WIDE,

mNumBlocksHigh$),$

blockSize$)$;

$\}$

$//$ Called to start a new game

public void newGame$()\{$

$//$ reset the snake

mSnake.reset$($NUM$\_$BLOCKS$\_$WIDE, mNumBlocksHigh$)$;

$//$ Get the apple ready for dinner

mApple.spawn$()$;

$//$ Reset the mScore

mScore $=0$;

$//$ Setup mNextFrameTime so an update can triggered

mNextFrameTime $=$ System.currentTimeMillis$()$;

$\}$

$//$ Handles the game loop

@Override

public void run$()\{$

while $($mPlaying$)\{$

if$(!$mPaused$)\{$

$//$ Update $10$ times a second

if $($updateRequired$())\{$

update$()$;

$\}$

$\}$

draw$()$;

$\}$

$\}$

$//$ Check to see if it is time for an update

public boolean updateRequired$()\{$

$//$ Run at $10$ frames per second

final long TARGET$\_$FPS $=10$;

$//$ There are $1000$ milliseconds in a second

final long MILLIS$\_$PER$\_$SECOND $=1000$;

$//$ Are we due to update the frame

if$($mNextFrameTime $<=$ System.currentTimeMillis$())\{$

$//$ Tenth of a second has passed

$//$ Setup when the next update will be triggered

mNextFrameTime $=$System.currentTimeMillis$()$

$+$ MILLIS$\_$PER$\_$SECOND $/$ TARGET$\_$FPS;

$//$ Return true so that the update and draw

$//$ methods are executed

return true;

$\}$return false;

$\}$

$//$ Update all the game objects

public void update$()\{$

$//$ Move the snake

mSnake.move$()$;

$//$ Did the head of the snake eat the apple?

if$($mSnake$.$checkDinner$($mApple$.$getLocation$()))\{$

$//$ This reminds me of Edge of Tomorrow.

$//$ One day the apple will be ready!

mApple.spawn$()$;

$//$ Add to mScore

mScore $=$ mScore $+1$;

$//$ Play a sound

mSP$.$play$($mEat$\_$ID$,1,1,0,0,1)$;

$\}$

$//$ Did the snake die?

if $($mSnake$.$detectD