Android ListView自动显示隐藏布局的实现方法

View header=new View(this);header.setLayoutParams(new AbsListView.LayoutParams(AbsListView.LayoutParams.MATCH_PARENT,(int)getResources().getDimension(R.dimen.abc_action_bar_default_height_material)));mListView.addHeaderView(header); //R.dimen.abc_action_bar_default_height_material为系统ActionBar的高度

mTouchSlop=ViewConfiguration.get(this).getScaledTouchSlop();//系统认为的最低滑动距离 

bbsListView.setOnTouchListener(new OnTouchListener() {@Overridepublic boolean onTouch(View v, MotionEvent event) {switch (event.getAction()) {case MotionEvent.ACTION_DOWN:mFirstY=event.getY();break;case MotionEvent.ACTION_MOVE:mCurrentY=event.getY();if(mCurrentY-mFirstY>mTouchSlop)direction=0; //listView向下滑动else if(mFirstY-mCurrentY>mTouchSlop)direction=1; //listView向上滑动if(direction==1){if(mShow){toolbarAnim(1); //隐藏上方的viewmShow=!mShow;}}else if(direction==0){if(!mShow){toolbarAnim(0); //展示上方的viewmShow=!mShow;}}case MotionEvent.ACTION_UP:break;}return false;}});}

protected void toolbarAnim(int flag) {if(set!=null && set.isRunning()){set.cancel();}if(flag==0){mAnimator1=ObjectAnimator.ofFloat(mToolbar, "translationY", linearView.getTranslationY(),0);mAnimator2=ObjectAnimator.ofFloat(mToolbar, "alpha", 0f,1f);}else if(flag==1){mAnimator1=ObjectAnimator.ofFloat(mToolbar, "translationY", linearView.getTranslationY(),-linearView.getHeight());mAnimator2=ObjectAnimator.ofFloat(mToolbar, "alpha", 1f,0f);}set=new AnimatorSet();set.playTogether(mAnimator1,mAnimator2);set.start();}//上面为位移还有透明度属性动画

dependencies{compile fileTree(include:['*.jar'],dir:'libs')compile 'com.android.support:appcompat-v7:21.0.3'}

final View header=new View(this); //给listView增加一个headView，避免第一个item被遮挡 header.post(new Runnable() {public void run() {header.setLayoutParams(new AbsListView.LayoutParams( AbsListView.LayoutParams.MATCH_PARENT, myView.getHeight()));}});