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public class MyView extends View {
       int lastX;    int lastY;    Scroller mScroller;    public MyView(Context context, AttributeSet attributeSet){
           super(context, attributeSet);        mScroller = new Scroller(context);    }    //6、2  属性动画一定要实现该属性的set方法    public void setWidth(int width){
           getLayoutParams().width = width;        requestLayout();    }    public int getW(){
           return getLayoutParams().width;    }    @Override    public boolean dispatchTouchEvent(MotionEvent event) {
           Log.i("_tag","MyView  dispatchTouchEvent");        return super.dispatchTouchEvent(event);    }    @Override    public boolean onTouchEvent(MotionEvent event) {
           Log.i("_tag","MyView  onTouchEvent  " + event.getAction());        int x = (int)event.getX();        int y = (int)event.getY();        switch(event.getAction()) {
               case MotionEvent.ACTION_DOWN:                lastX = x;                lastY = y;                break;            case MotionEvent.ACTION_MOVE:                int offsetX = x - lastX;                int offsetY = y - lastY;                //1、滑动方法1 --->  layout（）//                layout(getLeft() + offsetX, getTop() + offsetY, getRight() + offsetX, getBottom() + offsetY);                //2、滑动方法2 ------> offsetLeftAndRight()//                offsetLeftAndRight(offsetX);//                offsetTopAndBottom(offsetY);                //3、滑动方法3  ------->  layoutParams//                ViewGroup.MarginLayoutParams layoutParams = (ViewGroup.MarginLayoutParams) getLayoutParams();//                layoutParams.leftMargin = getLeft() + offsetX;//                layoutParams.topMargin = getTop() + offsetY;//                setLayoutParams(layoutParams);                //4、scrollBy是移动一定的偏移，scrollTo是移动到某个位置//                ((View)getParent()).scrollBy(-offsetX, -offsetY);                break;            case MotionEvent.ACTION_UP:                View viewGroup = ((View)getParent());                //5.1、使用 Scroller 结合  scrollTo（）                mScroller.startScroll(viewGroup.getScrollX(), viewGroup.getScrollY(), viewGroup.getScrollX(), viewGroup.getScrollY());                invalidate();                //6.1、属性动画                AnimatorSet animatorSet = new AnimatorSet();                animatorSet.playTogether(                        ObjectAnimator.ofInt(this, "width", getW(), 100),                        ObjectAnimator.ofFloat(this, "rotationX", 0, 360),                        ObjectAnimator.ofFloat(this, "rotationX", 0, 180),                        ObjectAnimator.ofFloat(this, "rotation", 0, -90),                        ObjectAnimator.ofFloat(this, "translationX", 0, 90),                        ObjectAnimator.ofFloat(this, "translationY", 0, 90),                        ObjectAnimator.ofFloat(this, "scaleX", 1, 1.5F),                        ObjectAnimator.ofFloat(this, "scaleY", 1, 0.5F),                        ObjectAnimator.ofFloat(this, "alpha", 1, 0.25F, 1)                );                                break;        }        return super.onTouchEvent(event);//        return true;    }    //5.2、使用Scroller, 循环：invalidate()---> onDraw() ---> computeScroll()    @Override    public void computeScroll() {
           super.computeScroll();        //判断scroller是否执行完毕        if(mScroller.computeScrollOffset()){
               ((View)getParent()).scrollTo(mScroller.getCurrX(), mScroller.getCurrY());            invalidate();        }    }}

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