/**
 * Copyright (c) 2013-2014, Rinc Liu (http://rincliu.com).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.rincliu.library.widget;

import android.content.Context;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ScrollView;

public class RLScrollView extends ScrollView{

	public RLScrollView(Context context) {
		super(context);
	}
	
	public RLScrollView(Context context, AttributeSet attrs) {
		super(context, attrs);
	}
	
	public RLScrollView(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
	}
	
	public interface OnScrollListener{
		public void onScrollChanged(int x, int y, int oldxX, int oldY);
		public void onScrollStopped();
		public void onScrollStoppedAtTop();
		public void onScrollStoppedAtBottom();
	}
	
	private OnScrollListener onScrollListener;
	
	/**
	 * 
	 * @param onScrollListener
	 */
	public void setOnScrollListener(OnScrollListener onScrollListener){
		this.onScrollListener=onScrollListener;
	}
	
	@Override
	protected void onScrollChanged(int x, int y, int oldX, int oldY){
		super.onScrollChanged(x, y, oldX, oldY);
		if(onScrollListener!=null){
			onScrollListener.onScrollChanged(x, y, oldX, oldY);
			onScrollListener.onScrollStopped();
            if(isAtTop()){
            	onScrollListener.onScrollStoppedAtTop();
    		}
            if(isAtBottom()){
    	    	onScrollListener.onScrollStoppedAtBottom();
    	    }
		}
	}
	
	/**
	 * 
	 * @param child
	 * @return
	 */
	public boolean isChildVisible(View child){
		if(child==null){
			return false;
		}
		Rect scrollBounds = new Rect();
		getHitRect(scrollBounds);
		return child.getLocalVisibleRect(scrollBounds);
	}
	
	/**
	 * 
	 * @return
	 */
	public boolean isAtTop(){
		return getScrollY()<=0;
	}
	
	/**
	 * 
	 * @return
	 */
	public boolean isAtBottom(){
		return getChildAt(getChildCount()-1).getBottom()+getPaddingBottom()
				==getHeight()+getScrollY();
	}
}
/**
 * Copyright (c) 2013-2014, Rinc Liu (http://rincliu.com).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.rincliu.library.widget;

import android.content.Context;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ScrollView;

public class RLScrollView extends ScrollView{
	
	private static final int MIN_VERTICAL_SCROLL=10;

	public RLScrollView(Context context) {
		super(context);
	}
	
	public RLScrollView(Context context, AttributeSet attrs) {
		super(context, attrs);
	}
	
	public RLScrollView(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
	}
	
	public interface OnScrollListener{
		public void onScrollChanged(int x, int y, int oldxX, int oldY);
		public void onScrollStopped();
		public void onScrollStoppedAtTop();
		public void onScrollStoppedAtBottom();
	}
	
	private OnScrollListener onScrollListener;
	
	/**
	 * 
	 * @param onScrollListener
	 */
	public void setOnScrollListener(OnScrollListener onScrollListener){
		this.onScrollListener=onScrollListener;
	}
	
	@Override
	protected void onScrollChanged(int x, int y, int oldX, int oldY){
		super.onScrollChanged(x, y, oldX, oldY);
		if(onScrollListener!=null){
			onScrollListener.onScrollChanged(x, y, oldX, oldY);
			if(Math.abs(y-oldY)<=MIN_VERTICAL_SCROLL){
				onScrollListener.onScrollStopped();
	            if(isAtTop()){
	            	onScrollListener.onScrollStoppedAtTop();
	    		}
	            if(isAtBottom()){
	    	    	onScrollListener.onScrollStoppedAtBottom();
	    	    }
			}
		}
	}
	
	/**
	 * 
	 * @param child
	 * @return
	 */
	public boolean isChildVisible(View child){
		if(child==null){
			return false;
		}
		Rect scrollBounds = new Rect();
		getHitRect(scrollBounds);
		return child.getLocalVisibleRect(scrollBounds);
	}
	
	/**
	 * 
	 * @return
	 */
	public boolean isAtTop(){
		return getScrollY()<=0;
	}
	
	/**
	 * 
	 * @return
	 */
	public boolean isAtBottom(){
		return getChildAt(getChildCount()-1).getBottom()+getPaddingBottom()
				==getHeight()+getScrollY();
	}
}
修复：RLScrollView回调方法onScrollStopped