android 自定义动画按钮

引用：http://blog.csdn.net/GEOLO/article/details/6221350

package com.geolo.android;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.ImageView;
public class MyButtonView extends ImageView{
    private Bitmap animBitmap = null;
    private Bitmap buttonBitmap = null;
    private int moveX = 0;
    private boolean isPress = false;
    private int timeID = 0;
    private Integer myButtonID[] = new Integer[]{
            R.drawable.mybutton01,
            R.drawable.mybutton02,
            R.drawable.mybutton03,
            R.drawable.mybutton04,
            R.drawable.mybutton05,
            R.drawable.mybutton06,
            R.drawable.mybutton07,
            R.drawable.mybutton08,
            R.drawable.mybutton09,
            R.drawable.mybutton10,
            R.drawable.mybutton11,
            R.drawable.mybutton12,
            R.drawable.mybutton13,
            R.drawable.mybutton14,
            R.drawable.mybutton15,
            R.drawable.mybutton16,
            R.drawable.mybutton17,
            R.drawable.mybutton18,
            R.drawable.mybutton19,
            R.drawable.mybutton20
    };
    public MyButtonView(Context context) {
        this(context, null);
    }
    public MyButtonView(Context context, AttributeSet attrs) {
        super(context,attrs);
        animBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.myutil);
        buttonBitmap = BitmapFactory.decodeResource(getResources(),myButtonID[0]);
        new Thread(new MyThread()).start();
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        drawImage(canvas,0,0,animBitmap,moveX,0,200,100);
        canvas.drawBitmap(buttonBitmap,20,15, null);
    }
    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        setMeasuredDimension(131, 53);
    }

    private void drawImage(Canvas canvas , int x, int y,Bitmap oldBitmap , int sx,int sy,int width ,int height){
        Rect rect_x = new Rect();
        rect_x.left = sx;
        rect_x.right = sx + width;
        rect_x.top = sy;
        rect_x.bottom = sy + height;
        Rect rect_y = new Rect();
        rect_y.left = x;
        rect_y.right = x + width;
        rect_y.top = y;
        rect_y.bottom = y + height;
        //按指定的裁剪矩形来绘制图片
        //分别是屏幕上的矩形和图片上要绘制的矩形裁剪
        Bitmap output = Bitmap.createBitmap(oldBitmap.getWidth(),
                oldBitmap.getHeight(), Config.ARGB_8888);
        Canvas canvas2 = new Canvas(output);
        Paint paint = new Paint();
        paint.setAntiAlias(true);
        //canvas.drawARGB(0, 0, 0, 0);
        //paint.setColor(0xff424242);
        //paint.setAlpha(140);
        //canvas2.drawRoundRect(new RectF(2,4,130,50), 10.0f, 10.0f, paint);
        canvas2.drawRoundRect(new RectF(1,0,130,50), 15.0f, 15.0f, paint);
        paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
        canvas2.drawBitmap(oldBitmap, rect_x, rect_y, paint);
        canvas.drawBitmap(output, 0 , 0, null);
        rect_x = null;
        rect_y = null;
    }

    @Override
    public boolean dispatchTouchEvent(MotionEvent event) {
        /*  if(isReleased){
            touchPoint = new Point();
            touchPoint.x = (int)event.getX();
            touchPoint.y = (int)event.getY();
        }*/
        switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN:
            isPress = true;
            break;
        case MotionEvent.ACTION_UP:
            isPress = false;
            break;
        default:
            break;
        }
        return true;
    }
    private class MyThread implements Runnable{
        @Override
        public void run() {
            while(!Thread.currentThread().isInterrupted()){
                try {
                    moveX++;
                    if(moveX > 100){
                        moveX = 0;
                    }
                    if(isPress){
                        timeID ++ ;
                        if(timeID <20){
                            buttonBitmap = BitmapFactory.decodeResource(getResources(), myButtonID[timeID]);
                        }else{
                            timeID =0 ;
                        }
                    }
                    Thread.sleep(50);
                } catch (Exception e) {
                    Thread.currentThread().interrupt();
                }
                postInvalidate();
            }
        }
    }
}