android ListView向上滑动隐藏标题，下拉显示标题栏

首先看看效果图，最下边有Demo的下载链接：

一、当前的Activity 重写dispatchTouchEvent 方法并且实现AnimationListener接口来达到动画的效果，代码如下：

 private boolean mIsTitleHide = false;    private boolean mIsAnim = false;    private float lastX = 0;    private float lastY = 0;    @Override    public boolean dispatchTouchEvent(MotionEvent event)    {        super.dispatchTouchEvent(event);        if (mIsAnim) {            return false;        }        final int action = event.getAction();        float x = event.getX();        float y = event.getY();        switch (action) {        case MotionEvent.ACTION_DOWN:            lastY = y;            lastX = x;            return false;        case MotionEvent.ACTION_MOVE:            float dY = Math.abs(y - lastY);            float dX = Math.abs(x - lastX);            boolean down = y > lastY ? true : false;            lastY = y;            lastX = x;            if (dX < 8 && dY > 8 && !mIsTitleHide && !down) {                Animation anim = AnimationUtils.loadAnimation(                        BlogListActivity.this, R.anim.push_top_in);//              anim.setFillAfter(true);                anim.setAnimationListener(BlogListActivity.this);                title_content.startAnimation(anim);            } else if (dX < 8 && dY > 8 && mIsTitleHide && down) {                Animation anim = AnimationUtils.loadAnimation(                    BlogListActivity.this, R.anim.push_top_out);//              anim.setFillAfter(true);                anim.setAnimationListener(BlogListActivity.this);                title_content.startAnimation(anim);            } else {                return false;            }            mIsTitleHide = !mIsTitleHide;            mIsAnim = true;            break;        default:            return false;        }        return false;    }

二、重写AnimationListener方法

@Overridepublic void onAnimationEnd(Animation animation) {// TODO Auto-generated method stubif (mIsTitleHide) {title.setVisibility(View.GONE);} else {}mIsAnim = false;}@Overridepublic void onAnimationRepeat(Animation animation) {// TODO Auto-generated method stub}@Overridepublic void onAnimationStart(Animation animation) {// TODO Auto-generated method stubtitle.setVisibility(View.VISIBLE);if (mIsTitleHide) {FrameLayout.LayoutParams lp = (LayoutParams) mlinear_listview.getLayoutParams();lp.setMargins(0, 0, 0, 0);mlinear_listview.setLayoutParams(lp);} else {FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) title.getLayoutParams();lp.setMargins(0, 0, 0, 0);title.setLayoutParams(lp);FrameLayout.LayoutParams lp1 = (LayoutParams) mlinear_listview.getLayoutParams();lp1.setMargins(0,getResources().getDimensionPixelSize(R.dimen.title_height),0, 0);mlinear_listview.setLayoutParams(lp1);}}

动画 push_top_in.xml

<?xml version="1.0" encoding="utf-8"?>

动画 push_top_out.xml

<?xml version="1.0" encoding="utf-8"?>

以上代码就可以实现具体的功能了。

Demo下载地址：http://download.csdn.net/detail/tuibiansoar/8153269

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