Slide extend/collapse Animation 사용하기

Slide extend/collapse Animation 사용하기 

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package com.handstudio.android.healthup.util;   import android.animation.ValueAnimator; import android.annotation.SuppressLint; import android.view.View; import android.view.ViewGroup;   @SuppressLint("NewApi") public class SlideAnimation {       /**      * 레이아웃 확장      * @param view      */     public void expand(View view) {         //set Visible         view.setVisibility(View.VISIBLE);           final int widthSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);         final int heightSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);         view.measure(widthSpec, heightSpec);           ValueAnimator mAnimator = slideAnimator(view, 0, view.getMeasuredHeight());         mAnimator.start();     }       /**      * 레이아웃 축소      * @param view      */     public void collapse(View view) {         int finalHeight = view.getHeight();         ValueAnimator mAnimator = slideAnimator(view,finalHeight, 0);         mAnimator.start();     }       /**      * 슬라이드 애니메이션      * @param view      * @param start      * @param end      * @return      */     public ValueAnimator slideAnimator(final View view,int start, int end) {           ValueAnimator animator = ValueAnimator.ofInt(start, end);           animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {             @Override             public void onAnimationUpdate(ValueAnimator valueAnimator) {                 //Update Height                 int value = (Integer) valueAnimator.getAnimatedValue();                 ViewGroup.LayoutParams layoutParams = view.getLayoutParams();                 layoutParams.height = value;                 view.setLayoutParams(layoutParams);             }         });         return animator;     }      }

 

 

 

​사용방법 

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OnTouchListener mOnTouchListener = new OnTouchListener(){           @Override         public boolean onTouch(View v, MotionEvent event) {             return gesture.onTouchEvent(event);         }              };          /**      * 제스처를 통해서 위아래 판단      * 위 아래 애니메이션을 통해서 액션바 추가/제거      */     final GestureDetector gesture = new GestureDetector(getActivity(),new GestureDetector.SimpleOnGestureListener() {           @Override         public boolean onDown(MotionEvent e) {             return true;         }           @Override         public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,                 float velocityY) {               if(e1.getY() > e2.getY()){ // 아래에서 위로(Down)                 slideAnimation.collapse(layoutActionbar);             }else if(e1.getY() < e2.getY()){ // 위에서 아래로(Up)                 if(layoutActionbar.getHeight() == 0){                     slideAnimation.expand(layoutActionbar);                 }             }             return super.onFling(e1, e2, velocityX, velocityY);         }     });