packagecn.yw.lib.animation;importcn.yw.lib.R;importandroid.content.Context;importandroid.graphics.Bitmap;importandroid.graphics.BitmapFactory;importandroid.graphics.Canvas;importandroid.graphics.Color;importandroid.graphics.Paint;importandroid.view.SurfaceHolder;importandroid.view.SurfaceView;public class LoadingAnimatorView extends SurfaceView implementsSurfaceHolder.Callback, Runnable {privateSurfaceHolder holder;privateBitmap bitmap;privatePaint paint1;privatePaint paint2;public boolean flag = true;private int y = 100;publicLoadingAnimatorView(Context context) {super(context);this.setFocusable(true);this.setFocusableInTouchMode(true);

holder= this.getHolder();

holder.addCallback(this);

paint1= newPaint();

paint1.setColor(Color.RED);

paint2= newPaint();

paint2.setColor(Color.GRAY);

Bitmap bitmap1=BitmapFactory.decodeStream(context.getResources()

.openRawResource(R.drawable.ic_launcher));

bitmap= bitmap1.extractAlpha();//获取一个透明图片

y =bitmap.getWidth();//初始化y轴坐标

}

//改变裁剪区域private voidplayAnimator() {if (y > 0) {

y-=3;

}

}private voiddrawLoadingAnimator() {

Canvas canvas= null;try{

canvas=holder.lockCanvas();if(canvas != null){

canvas.drawBitmap(bitmap,100, 100,null);

canvas.drawColor(Color.GREEN);

canvas.drawBitmap(bitmap,100, 100, paint2);

canvas.save();

//裁剪

canvas.clipRect(100, y+100, bitmap.getWidth()+100,

bitmap.getHeight()+100);

canvas.drawBitmap(bitmap,100, 100, paint1);

canvas.restore();

}/** Rect src = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());

* Rect dst = new Rect(100, 100, bitmap.getWidth()+100, y+100);

* canvas.drawBitmap(bitmap, src, dst, paint2);*/}catch(Exception e) {

e.printStackTrace();

}finally{try{if (holder != null) {

holder.unlockCanvasAndPost(canvas);

}

}catch(Exception e){

e.printStackTrace();

}

}

}

@Overridepublic void surfaceChanged(SurfaceHolder holder, int format, intwidth,intheight) {

}

@Overridepublic voidsurfaceCreated(SurfaceHolder holder) {new Thread(this).start();//开启绘制线程

}

@Overridepublic voidsurfaceDestroyed(SurfaceHolder holder) {

}

//绘制动画线程

@Overridepublic voidrun() {while(flag) {

drawLoadingAnimator();

playAnimator();try{

Thread.sleep(200);

}catch(Exception e) {

e.printStackTrace();

}

}

}

}