android 下拉淡入淡出特效源码

android 下拉,淡入淡出特效源码 依赖support v7 // /** * PopupWindow上菜单进入动画 */ public static Animation createPopupAnimIn(Context context, int fromYDelta) { AnimationSet animationSet = new AnimationSet(context, null); // animationSet.setInterpolator(new BounceInterpolator()); //结束时弹跳 animationSet.setFillAfter(true); //移动 TranslateAnimation translateAnim = new TranslateAnimation(0, 0, fromYDelta, 20); translateAnim.setDuration(TIME_IN); animationSet.addAnimation(translateAnim); //回弹效果 TranslateAnimation translateAnim2 = new TranslateAnimation(0, 0, 0, -20); translateAnim2.setStartOffset(TIME_IN); translateAnim2.setDuration(TIME_IN_BACK); animationSet.addAnimation(translateAnim2); return animationSet; } /** * PopupWindow上菜单离开动画 */ public static Animation createPopupAnimOut(Context context, int toYDelta) { AnimationSet animationSet = new AnimationSet(context, null); animationSet.setFillAfter(true); TranslateAnimation translateAnim = new TranslateAnimation(0, 0, 0, toYDelta); translateAnim.setDuration(TIME_OUT); animationSet.addAnimation(translateAnim); return animationSet; } /** * PopupWindow背景进入动画(透明度渐变) */ public static Animation createPopupBgFadeInAnim() { AlphaAnimation anim = new AlphaAnimation(0, 1.0f); anim.setDuration(TIME_IN); anim.setFillAfter(true); return anim; } /** * PopupWindow背景离开动画(透明度渐变) */ public static Animation createPopupBgFadeOutAnim(int duration) { AlphaAnimation anim = new AlphaAnimation(1.0f, 0); anim.setDuration(duration); anim.setFillAfter(true); return anim; } /** * PopupWindow按钮点击动画 */ public static Animation createPopupItemBiggerAnim(Context context) { AnimationSet animationSet = new AnimationSet(context, null); anim