import android.view.View;
import android.widget.AbsListView;
import android.widget.Toast;
import android.widget.AbsListView.OnScrollListener;
/**
* 滚动至列表底部,读取下一页数据
*/
public class AutoLoadListener implements OnScrollListener {
public interface AutoLoadCallBack {
void execute();
}
private int getLastVisiblePosition = 0, lastVisiblePositionY = 0;
private AutoLoadCallBack mCallback;
public AutoLoadListener(AutoLoadCallBack callback) {
this.mCallback = callback;
}
public void onScrollStateChanged(AbsListView view, int scrollState) {
if (scrollState == OnScrollListener.SCROLL_STATE_IDLE) {
//滚动到底部
if (view.getLastVisiblePosition() == (view.getCount() - 1)) {
View v = (View) view.getChildAt(view.getChildCount() - 1);
int[] location = new int[2];
v.getLocationOnScreen(location);//获取在整个屏幕内的绝对坐标
int y = location[1];
MyLog.d("x" + location[0], "y" + location[1]);
if (view.getLastVisiblePosition() != getLastVisiblePosition && lastVisiblePositionY != y)//第一次拖至底部
{
Toast.makeText(view.getContext(), "已经拖动至底部,再次拖动即可翻页", 500).show();
getLastVisiblePosition = view.getLastVisiblePosition();
lastVisiblePositionY = y;
return;
} else if (view.getLastVisiblePosition() == getLastVisiblePosition && lastVisiblePositionY == y)//第二次拖至底部
{
mCallback.execute();
}
}
//未滚动到底部,第二次拖至底部都初始化
getLastVisiblePosition = 0;
lastVisiblePositionY = 0;
}
}
public void onScroll(AbsListView arg0, int arg1, int arg2, int arg3) {
}
}
文章引自:http://blog.youkuaiyun.com/hellogv/article/details/6615487