给Android ListView添加删除item动画
给listview删除一个item的时候加上一个折叠动画，感觉效果会好一点。
步骤是当删除一个view，先用动画把view的高度改变，看上去就是折叠的效果。当动画完成的时候，再真正把item移除。
private void deletePattern(final View view, final int position) {
Animation.AnimationListener al = new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
mDBHelper.deleteCustomPattern(mPatternList.get(position));
mPatternList.remove(position);
mPatternAdapter.notifyDataSetChanged();
}
@Override
public void onAnimationRepeat(Animation animation) {
}
};
collapse(view, al);
}
private void collapse(final View view, Animation.AnimationListener al) {
final int originHeight = view.getMeasuredHeight();
Animation animation = new Animation() {
@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
if (interpolatedTime == 1.0f) {
view.setVisibility(View.GONE);
} else {
view.getLayoutParams().height = originHeight - (int) (originHeight * interpolatedTime);
view.requestLayout();
}
}
@Override
public boolean willChangeBounds() {
return true;
}
};
if (al != null) {
animation.setAnimationListener(al);
}
animation.setDuration(300);
view.startAnimation(animation);
}
