SurfaceView应用实例动态小鱼

package com.fm; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.util.Log; import android.view.KeyEvent; import android.view.MotionEvent; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.SurfaceHolder.Callback; /** * * @author Himi * */ public class MySurfaceView extends SurfaceView implements Callback, Runnable { private SurfaceHolder sfh; private Paint paint; private Thread th; private boolean flag; private Canvas canvas; private int screenW, screenH; //首先声明十个容量的位图数组 private Bitmap fishBmp[] = new Bitmap[10]; //记录当前播放帧 private int currentFrame; private Bitmap bmp; //声明波浪图的X,Y坐标 private int bmpX, bmpY; // /** * SurfaceView初始化函数 */ public MySurfaceView(Context context) { super(context); sfh = this.getHolder(); sfh.addCallback(this); paint = new Paint(); paint.setColor(Color.WHITE); paint.setAntiAlias(true); setFocusable(true); //将每张小鱼帧图生成位图存入小鱼帧数组中 for (int i = 0; i < fishBmp.length; i++) { fishBmp[i] = BitmapFactory.decodeResource(this.getResources(), R.drawable.fish0 + i); } } /** * SurfaceView视图创建，响应此函数 */ @Override public void surfaceCreated(SurfaceHolder holder) { screenW = this.getWidth(); screenH = this.getHeight(); bmp = BitmapFactory.decodeResource(this.getResources(), R.drawable.water); //让位图初始化X坐标正好充满屏幕 bmpX = -bmp.getWidth()+this.getWidth(); //让位图绘制在的最下方，且图片Y坐标正好是（屏幕高-图片高） bmpY = this.getHeight() - bmp.getHeight(); flag = true; //实例线程 th = new Thread(this); //启动线程 th.start(); } /** * 游戏绘图 */ public void myDraw() { try { canvas = sfh.lockCanvas(); if (canvas != null) { canvas.drawColor(Color.WHITE); canvas.drawBitmap(bmp, bmpX, bmpY, new Paint()); canvas.drawBitmap(fishBmp[currentFrame],200 , this.getHeight()-100, paint); } } catch (Exception e) { // TODO: handle exception } finally { if (canvas != null) sfh.unlockCanvasAndPost(canvas); } } /** * 触屏事件监听 */ @Override public boolean onTouchEvent(MotionEvent event) { return true; } /** * 按键事件监听 */ @Override public boolean onKeyDown(int keyCode, KeyEvent event) { return super.onKeyDown(keyCode, event); } /** * 游戏逻辑 */ private void logic() { if(bmpX>0) { bmpX=-bmp.getWidth()+this.getWidth(); } bmpX+=5; currentFrame++; if (currentFrame >= fishBmp.length) { currentFrame = 0; } } @Override public void run() { while (flag) { long start = System.currentTimeMillis(); myDraw(); logic(); long end = System.currentTimeMillis(); try { if (end - start < 50) { Thread.sleep(50 - (end - start)); } } catch (InterruptedException e) { e.printStackTrace(); } } } /** * SurfaceView视图状态发生改变，响应此函数 */ @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } /** * SurfaceView视图消亡时，响应此函数 */ @Override public void surfaceDestroyed(SurfaceHolder holder) { flag = false; } }