首先创建核心类GameView.java，源码如下：
public class GameView extends SurfaceView implements
SurfaceHolder.Callback {
//屏幕宽高
public static int SCREEN_WIDTH;
public static int SCREEN_HEIGHT;
private Context mContext;
private SurfaceHolder mHolder;
//最大帧数 (1000 / 30)
private static final int DRAW_INTERVAL = 30;
private DrawThread mDrawThread;
private FrameAnimation []spriteAnimations;
private Sprite mSprite;
private int spriteWidth = 0;
private int spriteHeight = 0;
private float spriteSpeed = (float)((500 * SCREEN_WIDTH / 480) * 0.001);
private int row = 4;
private int col = 4;
public GameSurfaceView(Context context) {
super(context);
this.mContext = context;
mHolder = this.getHolder();
mHolder.addCallback(this);
initResources();
mSprite = new Sprite(spriteAnimations,0,0,spriteWidth,spriteHeight,spriteSpeed);
}
private void initResources() {
Bitmap[][] spriteImgs = generateBitmapArray(mContext, R.drawable.sprite, row, col);
spriteAnimations = new FrameAnimation[row];
for(int i = 0; i < row; i ++) {
Bitmap []spriteImg = spriteImgs[i];
FrameAnimation spriteAnimation = new FrameAnimation(spriteImg,new int[]{150,150,150,150},true);
spriteAnimations[i] = spriteAnimation;
}
}
public Bitmap decodeBitmapFromRes(Context context, int resourseId) {
BitmapFactory.Options opt = new BitmapFactory.Options();
opt.inPreferredConfig = Bitmap.Config.RGB_565;
opt.inPurgeable = true;
opt.inInputShareable = true;
InputStream is = context.getResources().openRawResource(resourseId);
return BitmapFactory.decodeStream(is, null, opt);
}
public Bitmap createBitmap(Context context, Bitmap source, int row,
int col, int rowTotal, int colTotal) {
Bitmap bitmap = Bitmap.createBitmap(source,
(col - 1) * source.getWidth() / colTotal,
(row - 1) * source.getHeight() / rowTotal, source.getWidth()
/ colTotal, source.getHeight() / rowTotal);
return bitmap;
}
public Bitmap[][] generateBitmapArray(Context context, int resourseId,
int row, int col) {
Bitmap bitmaps[][] = new Bitmap[row][col];
Bitmap source = decodeBitmapFromRes(context, resourseId);
this.spriteWidth = source.getWidth() / col;
this.spriteHeight = source.getHeight() / row;
for (int i = 1; i <= row; i++) {
for (int j = 1; j <= col; j++) {
bitmaps[i - 1][j - 1] = createBitmap(context, source, i, j,
row, col);
}
}
if (source != null && !source.isRecycled()) {
source.recycle();
source = null;
}
return bitmaps;
}
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
}
public void surfaceCreated(SurfaceHolder holder) {
if(null == mDrawThread) {
mDrawThread = new DrawThread();
mDrawThread.start();
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
if(null != mDrawThread) {
mDrawThread.stopThread();
}
}
private class DrawThread extends Thread {
public boolean isRunning = false;
public DrawThread() {
isRunning = true;
}
public void stopThread() {
isRunning = false;
boolean workIsNotFinish = true;
while (workIsNotFinish) {
try {
this.join();// 保证run方法执行完毕
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
workIsNotFinish = false;
}
}
public void run() {
long deltaTime = 0;
long tickTime = 0;
tickTime = System.currentTimeMillis();
while (isRunning) {
Canvas canvas = null;
try {
synchronized (mHolder) {
canvas = mHolder.lockCanvas();
//设置方向
mSprite.setDirection();
//更新精灵位置
mSprite.updatePosition(deltaTime);
drawSprite(canvas);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (null != mHolder) {
mHolder.unlockCanvasAndPost(canvas);
}
}
deltaTime = System.currentTimeMillis() - tickTime;
if(deltaTime < DRAW_INTERVAL) {
try {
Thread.sleep(DRAW_INTERVAL - deltaTime);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
tickTime = System.currentTimeMillis();
}
}
}
private void drawSprite(Canvas canvas) {
//清屏操作
canvas.drawColor(Color.BLACK);
mSprite.draw(canvas);
}
}
