package com.exmple.listscrow;

import java.util.logging.LogManager;

import android.content.Context;

import android.util.AttributeSet;

import android.view.MotionEvent;

import android.view.View;

import android.widget.ListView;

public class MyListView extends ListView {

	int mLastMotionY;

	boolean bottomFlag;

	public MyListView(Context context, AttributeSet attrs) {

		super(context, attrs);

		// TODO Auto-generated constructor stub

	}

	@Override

	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

		// 对height重新赋值

		heightMeasureSpec = MeasureSpec.makeMeasureSpec(

		/* Integer.MAX_VALUE>> 2 */300, MeasureSpec.AT_MOST);

		super.onMeasure(widthMeasureSpec, heightMeasureSpec);

	}

	@Override

	public boolean onInterceptTouchEvent(MotionEvent ev) {

		if (bottomFlag) {

			getParent().requestDisallowInterceptTouchEvent(true);

		}

		return super.onInterceptTouchEvent(ev);

	}

	@Override

	public boolean onTouchEvent(MotionEvent ev) {

		int y = (int) ev.getRawY();

		switch (ev.getAction()) {

		case MotionEvent.ACTION_DOWN:

			// 妫ｆ牕鍘涢幏锔藉焻down娴滃娆�,鐠佹澘缍峺閸ф劖鐖�

			mLastMotionY = y;

			break;

		case MotionEvent.ACTION_MOVE:

			// deltaY > 0 閺勵垰鎮滄稉瀣箥閸旓拷,< 0閺勵垰鎮滄稉濠呯箥閸旓拷

			int deltaY = y - mLastMotionY;

			if (deltaY < 0) {

				View child = getChildAt(0);

				if (child != null) {

					if (getLastVisiblePosition() == (getChildCount() - 1)

							) {

						bottomFlag = true;

						getParent().requestDisallowInterceptTouchEvent(true);

					}

				}

			}

			break;

		case MotionEvent.ACTION_UP:

		case MotionEvent.ACTION_CANCEL:

			break;

		}

		return super.onTouchEvent(ev);

	}

}