滾動到頂部判斷:
getScrollY() == 0
滾動到底部判斷:
View childView = getChildAt(0);
childView.getMeasuredHeight() <= getScrollY() + getHeight();
其中getChildAt表示得到ScrollView的child View
childView.getMeasuredHeight()表示得到子View的高度,
getScrollY()表示得到y軸的滾動距離，
getHeight()爲scrollView的高度
getScrollY()達到最大時加上scrollView的高度就的就等於它內容的高度了.
判斷滑動位置的地方，可以有兩種方式：
1、實現OnTouchListener來監聽是否滑動到最底部
OnTouchListener onTouchListener=new OnTouchListener(){
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_UP:
if (childView != null && childView .getMeasuredHeight()
<= getScrollY() + getHeight()) {
} else if (getScrollY() == 0) {
}
break;
}
return false;
}
}
2、重寫ScrollView的onScrollChanged的方法，在onScrollChanged函數中判斷
public class myScrollView extends ScrollView
{
public myScrollView(Context context)
{
super(context);
}
public myScrollView(Context context, AttributeSet attributeSet)
{
super(context,attributeSet);
}
@Override
protected void onScrollChanged(int l, int t, int oldl, int oldt)
{
View view = (View)getChildAt(getChildCount()-1);
int d = view.getBottom();
d -= (getHeight()+getScrollY());
if(d==0)
{
//you are at the end of the list in scrollview
//do what you wanna do here
}
else
super.onScrollChanged(l,t,oldl,oldt);
}
}