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rotation相关知识

  • 动态地图标注算法
    Dynamic maps that allow continuous map rotations, e.g., on mobile devices, encounter new issues unseen in static map labeling before. We study the following dynamic map labeling problem: The input is a static, labeled map, i.e., a set P of points in the plane with attached nonoverlapping horizontal rectangular labels. The goal is to find a consistent labeling of P under rotation that maximizes the number of visible labels for all rotation angles such that
  • ObjectAnimator
    透明度alphaanimator = ObjectAnimator.ofFloat(textView, "alpha", 1, 0, 1); alphaanimator.setDuration(3*1000); alphaanimator.start();旋转:rotationanimator = ObjectAnimator.ofFloat(textView, "rotation", 0, 360, 0); rotationanimator.setDuration(3*1000); rotationanimator.start();大小: scaleanimator = ObjectAnimator.ofFloat(textView, "scaleX", 0.5f, 1); scaleanimator.setDuration(3*1000); scaleanimator.start();背景色:bgcoloranimato
  • Android 属性动画的使用
    ObjectAnimator 使用属性动画有3种方法: 1、使用ObjectAnimator类; eg: ObjectAnimator.ofFloat(mImageView, "translationX", 0, i * 100F).setDuration(1000).start(); (1)第一个参数为Object 一般为需要实现动画的对象。 (2)第二个为要实现的动画类型(String类型) 具体有"translationX","translationY","rotation","alpha","scaleX"等 (3)第三个为values数组值,一般为 从...到...。 2、使用PropertyValuesHolder类; eg:PropertyValuesHolder p1 = PropertyValuesHo
  • ViewPager3D旋转效果
    这是一个3D旋转效果的viewPager:ViewPager viewPager= (ViewPager) findViewById(R.id.viewPager);PagerAdapter实现几个方法getCount:返回数据源sizeisViewFromObject()你pagerAdapter选中的内容是不是当成一个对象来处理的意思吧instantiateItem:instantiateItem将view添加,并且返回destroyItem:移除一个view3D旋转动画的实现 viewPager.setPageTransformer(true, transformer);设置自定义旋转动画;    @Override    public void onTransform(View view, float position) {        float rotation = 180f * position;&nb

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