Android游戏开发之帧动画的处理源码

package cn.m15.xys; import java.io.InputStream; import android.app.Activity; 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.os.Bundle; import android.view.Display; import android.view.KeyEvent; import android.view.View; import android.view.Window; import android.view.WindowManager; /** * xuanyusong@gmail.com * @author 宣雨松 * */ public class AnimationAcitvity extends Activity { AnimView mAnimView = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // 全屏显示窗口 requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); // 获取屏幕宽高 Display display = getWindowManager().getDefaultDisplay(); // 显示自定义的游戏View mAnimView = new AnimView(this,display.getWidth(), display.getHeight()); setContentView(mAnimView); } public class AnimView extends View { /**向下移动动画**/ public final static int ANIM_DOWN = 0; /**向左移动动画**/ public final static int ANIM_LEFT = 1; /**向右移动动画**/ public final static int ANIM_RIGHT = 2; /**向上移动动画**/ public final static int ANIM_UP = 3; /**动画的总数量**/ public final static int ANIM_COUNT = 4; Animation mHeroAnim [] = new Animation[ANIM_COUNT]; Animation mTestAnim [] = new Animation[ANIM_COUNT]; Paint mPaint = null; /**任意键被按下**/ private boolean mAllkeyDown = false; /**按键下**/ private boolean mIskeyDown = false; /**按键左**/ private boolean mIskeyLeft = false; /**按键右**/ private boolean mIskeyRight = false; /**按键上**/ private boolean mIskeyUp = false; //当前绘制动画状态ID int mAnimationState = 0; //上一篇已经介绍了地图块的绘制 这里我暂时先写成一张PNG Bitmap mMapImage = null; /** * 构造方法 * * @param context */ public AnimView(Context context,int screenWidth, int screenHeight) { super(context); mPaint = new Paint(); //这里可以用循环来处理总之我们需要把动画的ID传进去 mHeroAnim[ANIM_DOWN] = new Animation(context,new int []{R.drawable.hero_down_a,R.drawable.hero_down_b,R.drawable.hero_down_c,R.drawable.hero_down_d},true); mHeroAnim[ANIM_LEFT] = new Animation(context,new int []{R.drawable.hero_left_a,R.drawable.hero_left_b,R.drawable.hero_left_c,R.drawable.hero_left_d},true); mHeroAnim[ANIM_RIGHT]= new Animation(context,new int []{R.drawable.hero_right_a,R.drawable.hero_right_b,R.drawable.hero_right_c,R.drawable.hero_right_d},true); mHeroAnim[ANIM_UP] = new Animation(context,new int []{R.drawable.hero_up_a,R.drawable.hero_up_b,R.drawable.hero_up_c,R.drawable.hero_up_d},true); //利用程序来切割图片 Bitmap testmap = ReadBitMap(context,R.drawable.enemy); Bitmap [][]bitmap = new Bitmap[ANIM_COUNT][ANIM_COUNT]; int tileWidth = testmap.getWidth() / ANIM_COUNT; int tileHeight = testmap.getHeight() / ANIM_COUNT; int i = 0,x = 0,y = 0; for(i =0; i < ANIM_COUNT; i++) { y = 0; bitmap[ANIM_DOWN][i] = BitmapClipBitmap(testmap,x,y,tileWidth,tileHeight); y+=tileHeight; bitmap[ANIM_LEFT][i] = BitmapClipBitmap(testmap,x,y,tileWidth,tileHeight); y+=tileHeight; bitmap[ANIM_RIGHT][i] = BitmapClipBitmap(testmap,x,y,tileWidth,tileHeight); y+=tileHeight; bitmap[ANIM_UP][i] = BitmapClipBitmap(testmap,x,y,tileWidth,tileHeight); x+= tileWidth; } mTestAnim[ANIM_DOWN] = new Animation(context,bitmap[ANIM_DOWN],true); mTestAnim[ANIM_LEFT] = new Animation(context,bitmap[ANIM_LEFT],true); mTestAnim[ANIM_RIGHT]= new Animation(context,bitmap[ANIM_RIGHT],true); mTestAnim[ANIM_UP] = new Animation(context,bitmap[ANIM_UP],true); mMapImage = ReadBitMap(context,R.drawable.map); } @Override protected void onDraw(Canvas canvas) { canvas.drawBitmap(mMapImage, 0,0, mPaint); canvas.save(); canvas.clipRect(0, 0,320, 30); mPaint.setColor(Color.WHITE); canvas.drawRect(0, 0,480, 30, mPaint); mPaint.setColor(Color.RED); canvas.restore(); /**根据按键更新显示动画**/ if (mAllkeyDown) { if (mIskeyDown) { mAnimationState = ANIM_DOWN; canvas.drawText("按下下键,开始播放向下动画开始", 0, 20, mPaint); } else if (mIskeyLeft) { mAnimationState = ANIM_LEFT; canvas.drawText("按下左键,开始播放向左动画开始", 0, 20, mPaint); } else if (mIskeyRight) { mAnimationState = ANIM_RIGHT; canvas.drawText("按下右键,开始播放向右动画开始", 0, 20, mPaint); } else if (mIskeyUp) { mAnimationState = ANIM_UP; canvas.drawText("按下上键,开始播放向上动画开始", 0, 20, mPaint); } /**绘制主角动画**/ mHeroAnim[mAnimationState].DrawAnimation(canvas, mPaint, 20, 100); mTestAnim[mAnimationState].DrawAnimation(canvas, mPaint, 100, 100); }else { /**按键抬起后人物停止动画**/ mHeroAnim[mAnimationState].DrawFrame(canvas, mPaint, 20, 100, 0); mTestAnim[mAnimationState].DrawFrame(canvas, mPaint, 100, 100, 0); canvas.drawText("按键已经抬起动画停止", 0, 20, mPaint); } super.onDraw(canvas); invalidate(); } /** * 设置按键状态true为按下 false为抬起 * @param keyCode * @param state */ public void setKeyState(int keyCode, boolean state) { switch(keyCode) { case KeyEvent.KEYCODE_DPAD_DOWN: mIskeyDown = state; break; case KeyEvent.KEYCODE_DPAD_UP: mIskeyUp = state; break; case KeyEvent.KEYCODE_DPAD_LEFT: mIskeyLeft = state; break; case KeyEvent.KEYCODE_DPAD_RIGHT: mIskeyRight = state; break; } mAllkeyDown = state; } /** * 程序切割图片 * @param bitmap * @param x * @param y * @param w * @param h * @return */ public Bitmap BitmapClipBitmap(Bitmap bitmap,int x, int y, int w, int h) { return Bitmap.createBitmap(bitmap, x, y, w, h); } /** * 读取本地资源的图片 * * @param context * @param resId * @return */ public Bitmap ReadBitMap(Context context, int resId) { BitmapFactory.Options opt = new BitmapFactory.Options(); opt.inPreferredConfig = Bitmap.Config.RGB_565; opt.inPurgeable = true; opt.inInputShareable = true; // 获取资源图片 InputStream is = context.getResources().openRawResource(resId); return BitmapFactory.decodeStream(is, null, opt); } } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { mAnimView.setKeyState(keyCode,true); return super.onKeyDown(keyCode, event); } @Override public boolean onKeyUp(int keyCode, KeyEvent event) { mAnimView.setKeyState(keyCode,false); return super.onKeyUp(keyCode, event); } }