ListView下拉刷新及上拉更多两种状态

时间：2023-01-03 22:30:28

一、前言：

很多应用都会用到ListView，当然如果是iOS就会用UITableViewController，这两个控件在不同的OS上，功能是一样的，只是有些细微的不同（iOS的UITableViewController支持静态与动态两种），不过，大多数应用都用的是动态属性，那么，这里就涉及到一个问题：刷新及加载更多内容。

目前网上流行的有两种方式：

1. 通用的方法，即将ListView, GridView和ScrollView当成ChildView，在这顶部及底部各加一个Layout，但是，一但出现了，就一直显示在顶部或底部，并不会随着ChildView的滚动而滚动，功能实用，就是有点破坏美感；

2. 各自实现，即如果需要实现ListView的下拉刷新和上拉更多，那么就得去继承ListView，并对它的HeaderView和FooterView做一些扩展，同理，GridView和ScrollView；

本篇将使用第二种方法来实现，如果通过继承ListView的方式，来实现下拉刷新，以及上拉更多，或者是点击底部加载更多的。

二、实现：

2.1 HeaderView的布局，以及代码实现

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="wrap_content"

    android:background="#ffffff"

    android:gravity="bottom">

    <RelativeLayout

        android:id="@+id/header_content"

        android:layout_width="match_parent"

        android:layout_height="60dip">

        <LinearLayout

            android:id="@+id/layoutTitle"

            android:layout_width="wrap_content"

        	   android:layout_height="wrap_content"

        	   android:layout_centerInParent="true"

        	   android:gravity="center"

        	   android:orientation="vertical">

            <TextView

	            android:id="@+id/refresh_tips"

	            android:layout_width="wrap_content"

	            android:layout_height="wrap_content"

	            android:textSize="15sp"

	            android:text="@string/pull_down_for_refresh"/>

            <LinearLayout

                android:layout_width="wrap_content"

                android:layout_height="wrap_content"

                android:orientation="horizontal"

                android:layout_marginTop="4dip">

                <TextView

		            android:layout_width="wrap_content"

		            android:layout_height="wrap_content"

		            android:textSize="12sp"

		            android:text="@string/label_update"/>

                <TextView

		            android:id="@+id/refresh_last_time"

		            android:layout_width="wrap_content"

		            android:layout_height="wrap_content"

		            android:textSize="12sp"

		            android:text="@string/label_last_time"/>

            </LinearLayout>

        </LinearLayout>

        <ImageView

	        android:id="@+id/ivArrow"

	        android:layout_height="wrap_content"

	        android:layout_width="wrap_content"

	        android:layout_toLeftOf="@id/layoutTitle"

	        android:layout_centerInParent="true"

	        android:layout_marginRight="30dip"

	        android:contentDescription="@string/image_desc"

	        android:src="@drawable/refresh_arrow_down"/>

        <ProgressBar

	        android:id="@+id/pbWaiting"

	        android:visibility="gone"

	        android:layout_height="wrap_content"

	        android:layout_width="wrap_content"

	        android:layout_toLeftOf="@id/layoutTitle"

	        android:layout_centerInParent="true"

	        android:layout_marginRight="30dip"

	        style="?android:attr/progressBarStyleSmall"/>

    </RelativeLayout>

</LinearLayout>

布局很简单，一些TextView，一个ImageView和一个ProgressBar。再来看看代码实现

package com.chris.list.refresh;

import android.content.Context;

import android.util.AttributeSet;

import android.view.Gravity;

import android.view.LayoutInflater;

import android.view.View;

import android.view.animation.Animation;

import android.view.animation.RotateAnimation;

import android.widget.ImageView;

import android.widget.LinearLayout;

import android.widget.ProgressBar;

import android.widget.TextView;

public class HeaderView extends LinearLayout {

	public final static int STATE_NORMAL = 0;

	public final static int STATE_WILL_RELEASE = 1;

	public final static int STATE_REFRESHING = 2;

	private int mState = STATE_NORMAL;

	private View mHeader = null;

	private ImageView mArrow = null;

	private ProgressBar mProgressBar = null;

	private TextView mRefreshTips = null;

	//private TextView mRefreshLastTime = null;

	private RotateAnimation mRotateUp = null;

	private RotateAnimation mRotateDown = null;

	private final static int ROTATE_DURATION = 250;

	public HeaderView(Context context) {

		this(context, null);

	}

	public HeaderView(Context context, AttributeSet attrs) {

		super(context, attrs);

		initHeaderView(context);

	}

	private void initHeaderView(Context context){

		LinearLayout.LayoutParams lp = new LayoutParams(

				LayoutParams.MATCH_PARENT, 0);

		mHeader = LayoutInflater.from(context).inflate(R.layout.refresh_header, null);

		addView(mHeader, lp);

		setGravity(Gravity.BOTTOM);

		mArrow = (ImageView) mHeader.findViewById(R.id.ivArrow);

		mProgressBar = (ProgressBar) mHeader.findViewById(R.id.pbWaiting);

		mRefreshTips = (TextView) mHeader.findViewById(R.id.refresh_tips);

		//mRefreshLastTime = (TextView) mHeader.findViewById(R.id.refresh_last_time);

		mRotateUp = new RotateAnimation(0.0f, -180.0f,

				Animation.RELATIVE_TO_SELF, 0.5f,

				Animation.RELATIVE_TO_SELF, 0.5f);

		mRotateUp.setDuration(ROTATE_DURATION);

		mRotateUp.setFillAfter(true);

		mRotateDown = new RotateAnimation(-180.0f, 0.0f,

				Animation.RELATIVE_TO_SELF, 0.5f,

				Animation.RELATIVE_TO_SELF, 0.5f);

		mRotateDown.setDuration(ROTATE_DURATION);

		mRotateDown.setFillAfter(true);

	}

	public void setHeaderState(int state){

		if(mState == state){

			return;

		}

		mArrow.clearAnimation();

		if(state == STATE_REFRESHING){

			mProgressBar.setVisibility(View.VISIBLE);

			mArrow.setVisibility(View.GONE);

		}else{

			mProgressBar.setVisibility(View.GONE);

			mArrow.setVisibility(View.VISIBLE);

		}

		switch(state){

		case STATE_NORMAL:

			mArrow.startAnimation(mRotateDown);

			mRefreshTips.setText(R.string.pull_down_for_refresh);

			break;

		case STATE_WILL_RELEASE:

			mArrow.startAnimation(mRotateUp);

			mRefreshTips.setText(R.string.release_for_refresh);

			break;

		case STATE_REFRESHING:

			mRefreshTips.setText(R.string.refreshing);

			break;

		default:

			break;

		}

		mState = state;

	}

	public int getCurrentState(){

		return mState;

	}

	public void setHeaderHeight(int height){

		if(height <= 0){

			height = 0;

		}

		LayoutParams lp = (LayoutParams) mHeader.getLayoutParams();

		lp.height = height;

		mHeader.setLayoutParams(lp);

	}

	public int getHeaderHeight(){

		return mHeader.getHeight();

	}

}

这个代码中，主要就两个函数：setHeaderState 和 setHeaderHeight。 前者是根据TouchEvent，以及当前移动的距离，来设置状态，同时，移动的距离去设置HeaderView的高度，达到一点一点的显示出来。

2.2 FooterView的布局，以及代码实现

看了HeaderView的布局与实现后，FooterView的布局与实现也差不多，咱们一起来看看吧

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="wrap_content"

    android:gravity="top" >

    <RelativeLayout

        android:id="@+id/footer_content"

        android:layout_width="match_parent"

        android:layout_height="60dip" >

        <TextView

            android:id="@+id/loader_tips"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_centerInParent="true"

            android:text="@string/pull_up_for_more"

            android:textSize="15sp" />

        <ImageView

            android:id="@+id/ivLoaderArrow"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_centerInParent="true"

            android:layout_marginRight="30dip"

            android:layout_toLeftOf="@id/loader_tips"

            android:contentDescription="@string/image_desc"

            android:src="@drawable/refresh_arrow_up" />

        <ProgressBar

            android:id="@+id/pbLoaderWaiting"

            style="?android:attr/progressBarStyleSmall"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_centerInParent="true"

            android:layout_marginRight="30dip"

            android:layout_toLeftOf="@id/loader_tips"

            android:visibility="gone" />

    </RelativeLayout>

</LinearLayout>

哇，这个布局比HeaderView布局还要简单！？这个布局涵盖了两部分，不过，在布局中无法体现出来，但在代码实现中体现出来了：

1. 上拉更多，这个布局全部显示；

2. 如果是滑到底部点击加载，就不会有ImageView；

还是来看看代码实现吧

package com.chris.list.refresh;

import android.content.Context;

import android.util.AttributeSet;

import android.view.LayoutInflater;

import android.view.View;

import android.view.animation.Animation;

import android.view.animation.RotateAnimation;

import android.widget.ImageView;

import android.widget.LinearLayout;

import android.widget.ProgressBar;

import android.widget.TextView;

public class FooterView extends LinearLayout {

	public final static int FOOTER_OPTIONS_PULL = 0;

	public final static int FOOTER_OPTIONS_CLICK = 1;

	private static int sFooterOps = FOOTER_OPTIONS_PULL;

	public final static int STATE_NORMAL = 0;

	public final static int STATE_WILL_RELEASE = 1;

	public final static int STATE_LOADING = 2;

	private int mState = STATE_NORMAL;

	private View mFooter = null;

	private ImageView mArrow = null;

	private ProgressBar mProgressBar = null;

	private TextView mLoaderTips = null;

	private RotateAnimation mRotateUp = null;

	private RotateAnimation mRotateDown = null;

	private final static int ROTATE_DURATION = 250;

	public FooterView(Context context) {

		this(context, null);

	}

	public FooterView(Context context, AttributeSet attrs) {

		super(context, attrs);

		initFooterView(context);

	}

	private void initFooterView(Context context){

		LinearLayout.LayoutParams lp = new LayoutParams(

				LayoutParams.MATCH_PARENT, 0);

		mFooter = LayoutInflater.from(context).inflate(R.layout.loader_footer, null);

		addView(mFooter, lp);

		mArrow = (ImageView) mFooter.findViewById(R.id.ivLoaderArrow);

		mProgressBar = (ProgressBar) mFooter.findViewById(R.id.pbLoaderWaiting);

		mLoaderTips = (TextView) mFooter.findViewById(R.id.loader_tips);

		mRotateDown = new RotateAnimation(0.0f, 180.0f,

				Animation.RELATIVE_TO_SELF, 0.5f,

				Animation.RELATIVE_TO_SELF, 0.5f);

		mRotateDown.setDuration(ROTATE_DURATION);

		mRotateDown.setFillAfter(true);

		mRotateUp = new RotateAnimation(180.0f, 0.0f,

				Animation.RELATIVE_TO_SELF, 0.5f,

				Animation.RELATIVE_TO_SELF, 0.5f);

		mRotateUp.setDuration(ROTATE_DURATION);

		mRotateUp.setFillAfter(true);

		setFooterViewOptions(FOOTER_OPTIONS_CLICK);

	}

	public void setFooterViewOptions(int options){

		sFooterOps = options;

		switch(sFooterOps){

		case FOOTER_OPTIONS_PULL:

			hide();

			break;

		case FOOTER_OPTIONS_CLICK:

			show();

			break;

		default:

			break;

		}

	}

	public int getFooterViewOptions(){

		return sFooterOps;

	}

	public void setFooterState(int state){

		if(mState == state){

			return;

		}

		mArrow.clearAnimation();

		if(state == STATE_LOADING){

			mProgressBar.setVisibility(View.VISIBLE);

			mArrow.setVisibility(View.GONE);

		}else{

			mProgressBar.setVisibility(View.GONE);

			mArrow.setVisibility(View.VISIBLE);

		}

		switch(state){

		case STATE_NORMAL:

			mArrow.startAnimation(mRotateUp);

			mLoaderTips.setText(R.string.pull_up_for_more);

			break;

		case STATE_WILL_RELEASE:

			mArrow.startAnimation(mRotateDown);

			mLoaderTips.setText(R.string.release_for_more);

			break;

		case STATE_LOADING:

			mLoaderTips.setText(R.string.loading);

			break;

		default:

			break;

		}

		mState = state;

	}

	public int getCurrentState(){

		return mState;

	}

	public void setFooterHeight(int height){

		if(height <= 0){

			height = 0;

		}

		LayoutParams lp = (LayoutParams) mFooter.getLayoutParams();

		lp.height = height;

		mFooter.setLayoutParams(lp);

	}

	public int getFooterHeight(){

		return mFooter.getHeight();

	}

	public void hide(){

		mArrow.clearAnimation();

		mArrow.setVisibility(View.VISIBLE);

		mLoaderTips.setText(R.string.pull_up_for_more);

		setFooterHeight(0);

	}

	public void show(){

		mArrow.clearAnimation();

		mArrow.setVisibility(View.GONE);

		mLoaderTips.setText(R.string.click_for_more);

		LayoutParams lp = (LayoutParams) mFooter.getLayoutParams();

		lp.height = LayoutParams.WRAP_CONTENT;

		mFooter.setLayoutParams(lp);

	}

}

代码中，有个Options函数，用来提供设置：上拉或点击。同样，也有设置状态，和设计高度。

2.3 扩展ListView的实现

package com.chris.list.refresh;

import android.content.Context;

import android.util.AttributeSet;

import android.util.Log;

import android.view.MotionEvent;

import android.view.View;

import android.view.ViewTreeObserver.OnGlobalLayoutListener;

import android.view.animation.DecelerateInterpolator;

import android.widget.AbsListView;

import android.widget.ListAdapter;

import android.widget.ListView;

import android.widget.RelativeLayout;

import android.widget.Scroller;

import android.widget.AbsListView.OnScrollListener;

public class ListViewExt extends ListView implements OnScrollListener {

	private final static String TAG = "ChrisLV";

	private HeaderView mHeaderView = null;

	private RelativeLayout mHeaderContent = null;

	private int iHeaderHeight = 0;

	private FooterView mFooterView = null;

	private RelativeLayout mFooterContent = null;

	private int iFooterHeight = 0;

	private final static int SCROLL_HEADER = 0;

	private final static int SCROLL_FOOTER = 1;

	private int iScrollWhich = SCROLL_HEADER;

	private Scroller mScroller = null;

	private final static float OFFSET_Y = 0.7f;

	private float iLastY = 0;

	private int mTotalNumber = 0;

	public ListViewExt(Context context) {

		this(context, null, 0);

	}

	public ListViewExt(Context context, AttributeSet attrs) {

		this(context, attrs, 0);

	}

	public ListViewExt(Context context, AttributeSet attrs, int defStyle) {

		super(context, attrs, defStyle);

		initView(context);

	}

	private void initView(Context context){

		/*

		 * mScroller用来回弹下拉刷新/上拉更多

		 * 配合computerScroll来使用

		 */

		mScroller = new Scroller(context, new DecelerateInterpolator());

		super.setOnScrollListener(this);

		initHeaderView(context);

		initFooterView(context);

	}

	@Override

	public void setAdapter(ListAdapter adapter) {

		if(getFooterViewsCount() == 0){

			addFooterView(mFooterView);

		}

		super.setAdapter(adapter);

	}

	@Override

	public boolean onTouchEvent(MotionEvent ev) {

		switch(ev.getAction()){

		case MotionEvent.ACTION_DOWN:

			iLastY = ev.getY();

			break;

		case MotionEvent.ACTION_MOVE:

			float deltaY = ev.getY() - iLastY;

			iLastY = ev.getY();

			if(canHeaderPull() && getFirstVisiblePosition() == 0 &&

			   (deltaY > 0 || mHeaderView.getHeaderHeight() > 0)){

				updateHeaderState(deltaY * OFFSET_Y);

			}else if(canFooterPull() && getLastVisiblePosition() == mTotalNumber - 1

					&& (deltaY < 0 || mFooterView.getFooterHeight() > 0)){

				updateFooterState(-deltaY * OFFSET_Y);

			}

			break;

		case MotionEvent.ACTION_UP:

			if(getFirstVisiblePosition() == 0){

				if(mHeaderView.getHeaderHeight() > iHeaderHeight){

				   mHeaderView.setHeaderState(HeaderView.STATE_REFRESHING);

				   if(mFooterView.getFooterViewOptions() == FooterView.FOOTER_OPTIONS_CLICK){

						mFooterView.hide();

					}

				}

				resetHeader();

			}else if(getLastVisiblePosition() == mTotalNumber - 1){

				if(mFooterView.getFooterHeight() > iFooterHeight){

					mFooterView.setFooterState(FooterView.STATE_LOADING);

				}

				resetFooter();

			}

			break;

		default:

			break;

		}

		return super.onTouchEvent(ev);

	}

	@Override

	public void computeScroll() {

		if(mScroller.computeScrollOffset()){

			if(iScrollWhich == SCROLL_HEADER){

				mHeaderView.setHeaderHeight(mScroller.getCurrY());

			}else if(iScrollWhich == SCROLL_FOOTER){

				mFooterView.setFooterHeight(mScroller.getCurrY());

			}

		}

		super.computeScroll();

	}

	/*

	 * 获取ListView有多少个item:

	 * 1. 在init中，需要设置super.setOnScrollListener;

	 * 2. 重载以下两个函数;

	 * 3. 在onScroll中取得totalItemCount即可;

	 */

	@Override

	public void onScroll(AbsListView view, int firstVisibleItem,

			int visibleItemCount, int totalItemCount) {

		mTotalNumber = totalItemCount;

	}

	@Override

	public void onScrollStateChanged(AbsListView view, int scrollState) {

	}

	/////////////////////////////////////////////////////////////////////////////

	private boolean canHeaderPull(){

		if(mFooterView.getCurrentState() == FooterView.STATE_NORMAL){

			return true;

		}

		return false;

	}

	private boolean canFooterPull(){

		if(mHeaderView.getCurrentState() == HeaderView.STATE_NORMAL){

			return true;

		}

		return false;

	}

	///////////////////////////////////// Header ////////////////////////////////

	public void stopRefresh(){

		if(mHeaderView.getCurrentState() == HeaderView.STATE_REFRESHING){

			mHeaderView.setHeaderState(HeaderView.STATE_NORMAL);

			resetHeader();

			if(mFooterView.getFooterViewOptions() == FooterView.FOOTER_OPTIONS_CLICK){

				mFooterView.show();

			}

		}

	}

	private void initHeaderView(Context context){

		mHeaderView = new HeaderView(context);

		mHeaderContent = (RelativeLayout) mHeaderView.findViewById(R.id.header_content);

		addHeaderView(mHeaderView);

		mHeaderView.getViewTreeObserver()

				   .addOnGlobalLayoutListener(new OnGlobalLayoutListener(){

			@Override

			public void onGlobalLayout() {

				iHeaderHeight = mHeaderContent.getHeight();

				Log.d(TAG, "iHeaderHeight = " + iHeaderHeight);

				getViewTreeObserver().removeGlobalOnLayoutListener(this);

			}

		});

	}

	private void updateHeaderState(float delta){

		mHeaderView.setHeaderHeight((int)(delta + mHeaderView.getHeaderHeight()));

		if(mHeaderView.getCurrentState() != HeaderView.STATE_REFRESHING){

			if(mHeaderView.getHeaderHeight() > iHeaderHeight){

				mHeaderView.setHeaderState(HeaderView.STATE_WILL_RELEASE);

			}else{

				mHeaderView.setHeaderState(HeaderView.STATE_NORMAL);

			}

		}

		setSelection(0);

	}

	private void resetHeader(){

		int height = mHeaderView.getHeaderHeight();

		if(height == 0){

			return;

		}

		int finalHeight = 0;

		if(height > iHeaderHeight){

			/*

			 * 如果超过HeaderView高度，则回滚到HeaderView高度即可

			 */

			finalHeight = iHeaderHeight;

		}else if(mHeaderView.getCurrentState() == HeaderView.STATE_REFRESHING){

			/*

			 * 如果HeaderView未完全显示

			 * 1. 处于正在刷新中，则不管;

			 * 2. 回滚HeaderView当前可视高度

			 */

			return;

		}

		iScrollWhich = SCROLL_HEADER;

		mScroller.startScroll(0, height, 0, finalHeight - height, 250);

		invalidate();

	}

	/////////////////////////////////////////////////////////////////////////////

	///////////////////////////////////// Footer ////////////////////////////////

	public void setFooterMode(int options){

		mFooterView.setFooterViewOptions(options);

	}

	public void stopLoad(){

		if(mFooterView.getCurrentState() == FooterView.STATE_LOADING){

			mFooterView.setFooterState(FooterView.STATE_NORMAL);

			resetFooter();

		}

	}

	private void initFooterView(Context context){

		mFooterView = new FooterView(context);

		mFooterContent = (RelativeLayout) mFooterView.findViewById(R.id.footer_content);

		mFooterContent.setOnClickListener(new OnClickListener(){

			@Override

			public void onClick(View v) {

				if(mFooterView.getFooterViewOptions() == FooterView.FOOTER_OPTIONS_CLICK

						&& mFooterView.getCurrentState() == FooterView.STATE_NORMAL){

					mFooterView.setFooterState(FooterView.STATE_LOADING);

				}

			}

		});

		mFooterView.getViewTreeObserver()

				   .addOnGlobalLayoutListener(new OnGlobalLayoutListener(){

			@Override

			public void onGlobalLayout() {

				iFooterHeight = mFooterContent.getHeight();

				Log.d(TAG, "iFooterHeight = " + iFooterHeight);

				getViewTreeObserver().removeGlobalOnLayoutListener(this);

			}

		});

	}

	private void updateFooterState(float delta){

		if(mFooterView.getFooterViewOptions() == FooterView.FOOTER_OPTIONS_CLICK){

			return;

		}

		mFooterView.setFooterHeight((int)(delta + mFooterView.getFooterHeight()));

		if(mFooterView.getCurrentState() != FooterView.STATE_LOADING){

			if(mFooterView.getFooterHeight() > iFooterHeight){

				mFooterView.setFooterState(FooterView.STATE_WILL_RELEASE);

			}else{

				mFooterView.setFooterState(FooterView.STATE_NORMAL);

			}

		}

	}

	private void resetFooter(){

		int height = mFooterView.getFooterHeight();

		if(height == 0){

			return;

		}

		if(mFooterView.getFooterViewOptions() == FooterView.FOOTER_OPTIONS_CLICK){

			return;

		}

		int finalHeight = 0;

		if(height > iFooterHeight){

			finalHeight = iFooterHeight;

		}else if(mFooterView.getCurrentState() == FooterView.STATE_LOADING){

			return;

		}

		iScrollWhich = SCROLL_FOOTER;

		mScroller.startScroll(0, height, 0, finalHeight - height, 250);

		invalidate();

	}

	/////////////////////////////////////////////////////////////////////////////

}

代码结构比较清楚，相关的都集中在一起，大致流程是：

1. down时，记住坐标；

2. move时，判断当前可见是否是第一个或是最后一个，如果是，则将移动的距离去设置HeaderView或FooterView的高度，达到一点一点的显示出来；

3. up时，判断HeaderView或FooterView是否滚动的距离超过它们的高度，如果是，则表示是刷新或加载，且回弹到移动的距离-高度；

4. 代码还提供了冲突设置，即如果当前正在刷新中，则不允许滚动到底部上拉更多，或者显示“点击加载更多”，同样，如果是底部正在加载，则不允许滚动到顶多，下拉刷新；

2.4 使用举例

首页布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".MainActivity" >

    <com.chris.list.refresh.ListViewExt

        android:id="@+id/listview"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:divider="#000000"

        android:dividerHeight="0.5dip"/>

</RelativeLayout>

首页Activity代码实现，和一般的使用ListView方法一样

package com.chris.list.refresh;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemClickListener;

import android.widget.ArrayAdapter;

import android.app.Activity;

public class MainActivity extends Activity {

	private final static String TAG = "ChrisLV";

	private ListViewExt mListView = null;

	private String[] mList = {

		"abcd1", "abcd2", "abcd3", "abcd4", "abcd5", "abcd6",

		"abcd7", "abcd8", "abcd9", "abcd10", "abcd11", "abcd12",

		"abcd13", "abcd14", "abcd15", "abcd16", "abcd17", "abcd18",

		"abcd19", "abcd20", "abcd21", "abcd22", "abcd23", "abcd24"

	};

	@Override

	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		setContentView(R.layout.activity_main);

		mListView = (ListViewExt) findViewById(R.id.listview);

		mListView.setAdapter(new ArrayAdapter<String>(this,

				android.R.layout.simple_list_item_1,

				mList));

		mListView.setOnItemClickListener(new OnItemClickListener(){

			@Override

			public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,

					long arg3) {

				Log.d(TAG, "arg2 = " + arg2);

				if(arg2 > 0){

					mListView.stopRefresh();

					mListView.stopLoad();

				}

				mListView.setFooterMode(arg2 % 2);

			}

		});

	}

}

在onItemClick中，只是做了简单的将HeaderView或FooterView停止，并设置FooterView的加载模式：是上拉更多，还是点击加载更多。

三、小结

本篇文章，大致就这么多，虽然，为了UI体验友好，花了很多精力，但是一通百通，其它的也不外乎是这些，所以大家学习后，希望能举一反三，同时，咱们也交流交流。

源码下载地址： http://download.csdn.net/detail/qingye_love/5597623

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