怎麼判斷android中ScrollView滑動到了最底部?

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表示獲得ScrollView的child View

childView.getMeasuredHeight()表示獲得子View的高度,

 getScrollY()表示獲得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，能夠有兩種方式：

一、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;

            }

 } 

二、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);

    }

}

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出處：http://blog.sina.com.cn/staratsky

做者：流星

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