将大图切割为小图片

package com.clip;
 
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;

/**
 * 切割图片并逐帧播放
 * 将一张6*2的大图片切割成12张小图片
 * @author zhouli
 *
 */
public class MyView extends SurfaceView implements Callback, Runnable {
	
	private Bitmap[] robotBmps = new Bitmap[12];
	private int frameX; // 小图在大图中的x坐标
	private int frameY; // 小图在大图中的y坐标
	private int frameW; // 小图的宽度
	private int frameH; // 小图的高度
	private SurfaceHolder sh;
	private Canvas canvas;
	private int currFrame; // 当前绘制帧
	private boolean flag;  // 线程循环标识
	
	public MyView(Context context) {
		super(context); 
		
		sh = this.getHolder();
		sh.addCallback(this);
		
		// 切割图片
		Bitmap robot = BitmapFactory.decodeResource(getResources(), R.drawable.robot);
		frameW = robot.getWidth() / 6;
		frameH = robot.getHeight() / 2;
		
		for (int i = 0; i < robotBmps.length; i++) {
			frameX = (i % 6) * frameW; 
			frameY = (i / 6) * frameH; 
			robotBmps[i] = Bitmap.createBitmap(robot, frameX, frameY, frameW, frameH);
		} 
	}

	private void logic() {
		currFrame++;
		if (currFrame >= 12) {
			currFrame = 0;
		}
	}
	/**
	 * 绘制图片
	 */
	private void drawFrame() {
		
		try {
			canvas = sh.lockCanvas();
			canvas.drawColor(Color.BLACK);
			
			if (canvas != null) {
				// 绘制机器人
				canvas.drawBitmap(robotBmps[currFrame], (this.getWidth() - frameW) / 2, (this.getHeight() - frameH) / 2, null);
			}
		} catch (Exception e) {
			e.printStackTrace(); 
		} finally {
			if (canvas != null) {
				sh.unlockCanvasAndPost(canvas);
			}
		}
	}
	
	@Override
	public void surfaceCreated(SurfaceHolder holder) {
		 flag = true;
		 currFrame = 0;
		 new Thread(this).start();
	}

	@Override
	public void surfaceChanged(SurfaceHolder holder, int format, int width,
			int height) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void surfaceDestroyed(SurfaceHolder holder) {
		flag = false;
	}

	@Override
	public void run() {
		while (flag) {
			drawFrame();
			logic();
			try {
				Thread.sleep(100);
			} catch (InterruptedException e) {
				e.printStackTrace();
			} 
		}
	} 
}

运行结果：