listView使用小技巧P66--P76

 android:divider="@android:color/darker_gray"
 android:dividerHeight="10dp" 

        android:scrollbars="none"

android:listSelector="@android:color/transparent"

      //N代表第N个item
        mListView.setSelection(N);
        //平滑效果
        mListView.smoothScrollToPosition(index);
        mListView.smoothScrollBy(distance,duration);
        mListView.smoothScrollByOffset(offset);    

 for(int i=0;i<mListView.getChildCount();i++){
            View view=mListView.getChildAt(i);
        }

       mListView.setEmptyView(view);

 mListView.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {

                switch (motionEvent.getAction()) {
                    case MotionEvent.ACTION_DOWN:
                        //触摸时操作
                        break;
                    case MotionEvent.ACTION_MOVE:
                        //移动时操作
                        break;
                    case MotionEvent.ACTION_UP:
                        //离开时操作
                        break;
                }


                return false;
            }
        });

 mListView.setOnScrollListener(new AbsListView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(AbsListView absListView, int state) {
                switch (state) {
                    case SCROLL_STATE_IDLE:
                        //滑动停止时
                        break;
                    case SCROLL_STATE_TOUCH_SCROLL:
                        //正在滚动
                        break;

                    case SCROLL_STATE_FLING:
                        //手指抛动时 即手指用力滑动
                        //在离开后ListView由于惯性继续滑动
                        break;

                }
            }

            @Override
            public void onScroll(AbsListView absListView, int firstVisibleItem,
                                 int visibleItemCount, int totalItemCount) {
                //滑动时一直调用

                //firstVisibleItem:当前能看到的第一个item的id，从0开始
                //visibleItemCount:当前能看到的Item的总数,显示了一小半的item也包括在内了
                //整个listView的item总数
                
                if(firstVisibleItem+visibleItemCount==totalItemCount && totalItem-count>0){
                    //滑动到最后一行
                }
                
                
                if(firstVisibleItem>lastVisibleItemPosition){
                    //上滑
                }else if(firstVisibleItem<lastVisibleItemPosition){
                    //下滑
                }
                lastVisibleItemPosition=firstVisibleItem;
            }   
        });

 mListView.getLastVisiblePosition();
 mListView.getFirstVisiblePosition();

 @Override
    protected boolean overScrollBy(int deltaX, int deltaY, int scrollX, int scrollY, int scrollRangeX, int scrollRangeY, int maxOverScrollX, int maxOverScrollY, boolean isTouchEvent) {
        return super.overScrollBy(deltaX, deltaY, scrollX, scrollY, scrollRangeX, scrollRangeY, maxOverScrollX, maxOverScrollY, isTouchEvent);
    }

@Override
    protected boolean overScrollBy(int deltaX, int deltaY, int scrollX, int scrollY, int scrollRangeX, int scrollRangeY, int maxOverScrollX, int maxOverScrollY, boolean isTouchEvent) {
        return super.overScrollBy(deltaX, deltaY, scrollX, scrollY, scrollRangeX, scrollRangeY, maxOverScrollX+slideDistanceX, maxOverScrollY+slideDistanceY, isTouchEvent);
    }

  DisplayMetrics metrics = context.getResources().getDisplayMetrics();
  float density = metrics.density;
  slideDistanceX =(int)(density * slideDistanceX);
  slideDistanceY =(int)(density * slideDistanceY);