listview删除动画 折叠效果

参照别人的移除效果，然后集成到项目里，直接上效果吧；

效果就是这样，下面shuoxia实现思路

1.初始化数据源

    private void initData() {        for (int i = 0; i < 20; i++) {            listData.add("数据：" + i);        }    }

2.适配器部分，重写getView方法：

 @Override    public View getView(final int position, View convertView, ViewGroup parent) {        // TODO Auto-generated method stub        final View view;        ViewHolderDeFriend vh;        if (convertView == null) {            view = inflater.inflate(R.layout.item_black_listview, parent, false);            setViewHolder(view);        } else if (((ViewHolderDeFriend) convertView.getTag()).needInflate) {            view = inflater.inflate(R.layout.item_black_listview, parent, false);            setViewHolder(view);        } else {            view = convertView;        }        vh = (ViewHolderDeFriend) view.getTag();        if (flag) {            vh.iv_delete.setVisibility(View.VISIBLE);        } else {            vh.iv_delete.setVisibility(View.GONE);            vh.btn_delete.setVisibility(View.GONE);        }        vh.tv_user_name.setText(listData.get(position));        vh.iv_delete.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                if (callBack != null) {                    callBack.deleteItem(view,listData.get(position), position);                }            }        });        return view;    }    public interface DeleteItemCallBack {        void deleteItem(View view, String strName, int position);    }    public class ViewHolderDeFriend {        public RoundOrCircleImageView user_icon_iv;        public TextView tv_user_name;        public TextView tv_user_time;        public ImageView iv_delete;        public Button btn_delete;        public boolean needInflate;    }    private void setViewHolder(View view) {        ViewHolderDeFriend viewHolder = new ViewHolderDeFriend();        viewHolder.btn_delete = (Button) view.findViewById(R.id.delete_btn);        viewHolder.iv_delete = (ImageView) view.findViewById(R.id.delete_iv);        viewHolder.user_icon_iv = (RoundOrCircleImageView) view.findViewById(R.id.black_user_icon);        viewHolder.tv_user_name = (TextView) view.findViewById(R.id.black_user_name);        viewHolder.tv_user_time = (TextView) view.findViewById(R.id.black_user_time);        viewHolder.needInflate = false;        view.setTag(viewHolder);    }

3.在activity中回调删除的接口

 adapter.setCallBack(new BlackListAdapter.DeleteItemCallBack() {            @Override            public void deleteItem(View view, String strName, int position) {                deletePattern(view, strName, position);            }        });

4.设置一个AnimationListener监听，动画结束后舒心数据

    private void deletePattern(final View view, final String name, final int position) {        Animation.AnimationListener al = new Animation.AnimationListener() {            @Override            public void onAnimationStart(Animation animation) {            }            @Override            public void onAnimationEnd(Animation animation) {                listData.remove(position);                BlackListAdapter.ViewHolderDeFriend vh = (BlackListAdapter.ViewHolderDeFriend) view.getTag();                vh.needInflate = true;                adapter.notifyDataSetChanged();                ToastUtil.show("解除成功  " + name);            }            @Override            public void onAnimationRepeat(Animation animation) {            }        };        collapse(view, al);    }

5.自定义一个动画,自定义动画需要重写applyTransformation方法, 关于自定义动画的有参考:

http://blog.csdn.net/startfromweb/article/details/7644405

interpolatedTime会从0.0增大到1.0  

只要开始了动画,且interpolatedTime只要没减到0则此方法会一直运行

这个就是实现逐渐位移往上的关键

  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);    }

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