要求将界面中显示的任意一个view(已经Measure好了)缩放移动到任意位置直至消失

可以用图片这样描述:

实现思路:使用系统缩放动画ScaleAnimation进行缩放和移动，缩放倍数和移动距离根据移动的view的xy宽高和目标xy计算，任意位置的动画将受到不同的布局限制，但activity有个windows里面包含decorView,decorView里面又包含rootview，decorView不包含通知栏，但包含通知栏的高度，所以选择使用rootview,即xml布局的上一层FrameLayout布局，你可以在rootview(通过getwindows().getdecorview.findViewById(android.R.id.content)或 activity.getWindow().getDecorView().getRootView();获得)添加移动的view，便可以在任意位置移动

代码实现:

public static void animToTagOnWindows (Activity activity,View tagView,View toView,float scale) {

int[] toXY = new int[2];

toView.getLocationOnScreen(toXY);

int centerX = (int) (toXY[0] + toView.getMeasuredWidth()/2f);

int centerY = (int) (toXY[1] + toView.getMeasuredHeight()/2f);

animToTagOnWindows(activity,tagView,centerX,centerY,scale);

}

public static void animToTagOnWindows (Activity activity, View tagView, int toCenterX, int toCenterY, float scale) {

int[] winXY = new int[2];

tagView.getLocationOnScreen(winXY);

float toX = tagView.getMeasuredWidth()*scale;

float toY = tagView.getMeasuredHeight()*scale;

float pivotX = (toCenterX-winXY[0])*1f/tagView.getMeasuredWidth();

float pivotY = (toCenterY-winXY[1])*1f/tagView.getMeasuredHeight();

ScaleAnimation scaleAnimation =new ScaleAnimation(1.0f,toX, 1f, toY, Animation.RELATIVE_TO_SELF,pivotX, Animation.RELATIVE_TO_SELF, pivotY);

final ImageView tempMoveView = new ImageView(activity);

tempMoveView.setScaleType(ImageView.ScaleType.FIT_XY);

Bitmap tempBm = getViewBitmap(tagView);

tempMoveView.setImageBitmap(tempBm);

FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(tagView.getMeasuredWidth(), tagView.getMeasuredHeight());

params.setMargins(winXY[0],winXY[1],winXY[0] +tagView.getMeasuredWidth(),winXY[1]+tagView.getMeasuredHeight());

tempMoveView.setLayoutParams(params);

final FrameLayout frameLayout = (FrameLayout) activity.getWindow().getDecorView().getRootView();

frameLayout.addView(tempMoveView);

scaleAnimation.setDuration(1000);

scaleAnimation.setFillAfter(true);

scaleAnimation.setAnimationListener(new Animation.AnimationListener() {

@Override

public void onAnimationStart(Animation animation) {

}

@Override

public void onAnimationEnd(Animation animation) {

//移除临时显示动画的view

frameLayout.removeView(tempMoveView);

}

@Override

public void onAnimationRepeat(Animation animation) {

}

});

tempMoveView.startAnimation(scaleAnimation);

}

博客出处

最终效果如下: