android游戏开发学习笔记六（学习书籍 Android游戏编程之从零开始）

/**

* 位图

*

* @author 岳振华

*

*/

@SuppressWarnings("unused")

public class BitMapSrufaceView extends SurfaceView implements Callback, Runnable {

private SurfaceHolder sfh;

private Thread thread;

private int surfaceW, surfaceH;

private Paint paint;

private Canvas canvas;

private boolean flag;// surfaceView是否消毁标志位

private Bitmap bitmap;// 位图图像

public BitMapSrufaceView(Context context) {

super(context);

/********** 画图所必需 *********************/

sfh = this.getHolder();// 获得surfaceHolder对象

sfh.addCallback(this);

thread = new Thread(this);

paint = new Paint();// 新建画笔

paint.setColor(Color.WHITE);// 设置画笔颜色

paint.setAntiAlias(true);// 消除锯齿

this.setKeepScreenOn(true);// 保持屏幕常亮

this.setFocusable(true);

/********************************************/

bitmap = BitmapFactory.decodeResource(this.getResources(), R.drawable.test);

}

/**

* 开始动画

*/

@Override

public void startAnimation(Animation animation) {

super.startAnimation(animation);

}

/**************************** callback的几个方法 ********************/

/**

* 当Surface第一次创建后会立即调用该函数 一般情况下都是在另外的线程来绘制界面，所以不要在这个函数中绘制Surface

*/

@Override

public void surfaceCreated(SurfaceHolder holder) {

surfaceW = this.getWidth();

surfaceH = this.getHeight();

thread = new Thread(this);

flag = true;

thread.start();// 开启线程

}

/**

* 当Surface的状态（大小和格式）发生变化的时候会调用 该函数 在surfaceCreated调用后该函数至少会被调用一次

*/

@Override

public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

}

@Override

public void surfaceDestroyed(SurfaceHolder holder) {

flag = false;

}

/**************************** callback的几个方法 ********************/

/**

* 绘图方法

*/

private void draw() {

try {

// 获得canvas实例

canvas = sfh.lockCanvas();

if (canvas != null) {

canvas.drawColor(Color.BLACK);// 填充，刷屏

// 绘制位图

// canvas.drawBitmap(bitmap,10,10,paint);

// 缩放位图

/*

* canvas.save(); canvas.scale( 0.1f, 0.1f); canvas.drawBitmap(bitmap, 10, 10, paint);

*/

// 恢复缩放

/*

* canvas.restore(); canvas.scale( 0.1f, 0.1f, 50 + bitmap.getWidth()/1000, 50 + bitmap.getHeight()/1000); canvas.drawBitmap(bitmap, 30, 30, paint);

*/

// 图片太大先缩小下

canvas.scale(0.1f, 0.1f, 50 + bitmap.getWidth() / 1000, 50 + bitmap.getHeight() / 1000);

// 旋转位图

/*

* canvas.save(); canvas.rotate(30); canvas.drawBitmap(bitmap, 10, 10, paint); canvas.restore(); canvas.drawBitmap(bitmap, 10, 400, paint);

*/

// 平移方式一

/*

* canvas.save(); canvas.translate(10, 10); canvas.drawBitmap(bitmap, 10, 10, paint); canvas.restore(); canvas.drawBitmap(bitmap, 100, 400, paint);

*/

// 平移方式二

/*

* canvas.save(); Matrix matrix=new Matrix(); matrix.postTranslate(0, 200); canvas.drawBitmap(bitmap, matrix, paint); canvas.restore(); canvas.drawBitmap(bitmap, 100, 400, paint);

*/

/*********************** 镜像反转位图 *****************/

// X轴镜像

canvas.drawBitmap(bitmap, 10, 10, paint);

canvas.save();

canvas.scale(-1, 1, bitmap.getWidth(), bitmap.getHeight());

canvas.drawBitmap(bitmap, 0, 200, paint);

canvas.restore();

// Y轴镜像

canvas.drawBitmap(bitmap, 10, 10, paint);

canvas.save();

canvas.scale(1, -1, bitmap.getWidth(), bitmap.getHeight());

canvas.drawBitmap(bitmap, 300, 0, paint);

canvas.restore();

//方式二

// X轴镜像

/*Matrix maMiX = new Matrix();

maMiX.postTranslate(100, 100);*/

// Y轴镜像

/*Matrix maMiX = new Matrix();

maMiX.postTranslate(100, 100);*/

/**********************************************************/

}

} catch (Exception e) {

e.printStackTrace();

} finally {

if (null != canvas) {

sfh.unlockCanvasAndPost(canvas);// 提交画布

}

}

}

@SuppressWarnings("static-access")

@Override

public void run() {

while (flag) {

// 绘图

draw();

try {

thread.sleep(100);

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

}