Android 自定义ListView实现底部分页刷新与顶部下拉刷新 .

来源：互联网发布：妇科检查知乎编辑：程序博客网时间：2024/06/01 21:22

在项目开发中，由于数据过大时，需要进行分页加载或下拉刷新，来缓解一次性加载的过长等待。本篇博文实例讲解通过自定义的ListView实现底部分页加载和顶部下拉刷新的效果。

其效果图：

一.ListView 底部分页加载

整个底部分页加载，主要分一下几步：

1.加载底部自定义View;

2.响应OnScrollListener监听事件，onScroll方法记录最后可见的View Item以及整个totalItemCount。当onScrollStateChanged状态改变时，

当滑动到底端，并滑动状态为 SCROLL_STATE_IDLE,显示底部加载View,开始实现自定义加载接口;

3.当数据加载完成时，隐藏底部下拉View.

自定义底部下拉加载PaginationListView代码如下：

[html] view plaincopyprint?

package com.example.paginationrefreshlistdemo.listview;
import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.ListView;
import com.example.paginationrefreshlistdemo.R;
public class PaginationListView extends ListView implements OnScrollListener{
//底部View
private View footerView;
//ListView item个数
int totalItemCount = 0;
//最后可见的Item
int lastVisibleItem = 0;
//是否加载标示
boolean isLoading = false;
public PaginationListView(Context context) {
super(context);
initView(context);
}
public PaginationListView(Context context, AttributeSet attrs) {
super(context, attrs);
initView(context);
}
public PaginationListView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
initView(context);
}
/**
* 初始化ListView
*/
private void initView(Context context){
LayoutInflater mInflater = LayoutInflater.from(context);
footerView = mInflater.inflate(R.layout.footer, null);
footerView.setVisibility(View.GONE);
this.setOnScrollListener(this);
//添加底部View
this.addFooterView(footerView);
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
//当滑动到底端，并滑动状态为 not scrolling
if(lastVisibleItem == totalItemCount && scrollState == SCROLL_STATE_IDLE){
if(!isLoading){
isLoading = true;
//设置可见
footerView.setVisibility(View.VISIBLE);
//加载数据
onLoadListener.onLoad();
}
}
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
this.lastVisibleItem = firstVisibleItem + visibleItemCount;
this.totalItemCount = totalItemCount;
}
private OnLoadListener onLoadListener;
public void setOnLoadListener(OnLoadListener onLoadListener){
this.onLoadListener = onLoadListener;
}
/**
* 加载数据接口
* @author Administrator
*
*/
public interface OnLoadListener{
void onLoad();
}
/**
* 数据加载完成
*/
public void loadComplete(){
footerView.setVisibility(View.GONE);
isLoading = false;
this.invalidate();
}
}

底部下拉加载布局footer.xml

[html] view plaincopyprint?

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/footer_ll"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="horizontal" >
<ProgressBar
android:id="@+id/progress"
style="?android:attr/progressBarStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="30dp"
android:layout_marginTop="30dp" />
<TextView
android:id="@+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="正在加载..."
android:textColor="#FF0000" />
</LinearLayout>

二.ListView顶部下拉刷新

数据顶部下拉刷新的步骤如下：

1.加载顶部自定义View,通过设置View的边距来显示和隐藏View；

2.通过OnScrollListener监听事件，获取ListView的活动状态以及firstVisibleItem首位可见的Item；

3.通过OnTouchListener监听事件，通过判断是否在首位，以及处理ACTION_DOWN,ACTION_MOVE,ACTION_UP

各个状态事件,并记录none（正常）,pull（下拉），release（释放），reflashing（刷新）等状态。

ACTION_DOWN:判断是否在首列，若是，记录该点位置startY;

ACTION_MOVE:记录移动后的tempY，获取间距space,与View的高度比较后，动态获取View上边距，并设置。

ACTION_UP:记录为reflashing状态，刷新数据

4.刷新完成后，还原各自所处状态，隐藏View。

顶部下拉刷新自定义ReflashListVIew

[html] view plaincopyprint?

package com.example.paginationrefreshlistdemo.listview;
import java.text.SimpleDateFormat;
import java.util.Date;
import android.annotation.SuppressLint;
import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.RotateAnimation;
import android.widget.AbsListView;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.ListView;
import com.example.paginationrefreshlistdemo.R;
public class RefreshListView extends ListView implements OnScrollListener{
//顶部View
private View topView;
//第一个可见View
int firstVisibleItem;
//顶部View的高度
int headerHeight;
// listview 当前滚动状态；
int scrollState;
// 标记，当前是在listview最顶端摁下的；
boolean isRefresh;
// 摁下时的Y值；
int startY;
int state;// 当前的状态；
final int NONE = 0;// 正常状态；
final int PULL = 1;// 提示下拉状态；
final int RELESE = 2;// 提示释放状态；
final int REFLASHING = 3;// 刷新状态；
public RefreshListView(Context context) {
super(context);
initView(context);
}
public RefreshListView(Context context, AttributeSet attrs) {
super(context, attrs);
initView(context);
}
public RefreshListView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
initView(context);
}
/**
* 初始化ListView
*/
private void initView(Context context){
LayoutInflater mInflater = LayoutInflater.from(context);
topView = mInflater.inflate(R.layout.top, null);
measureView(topView);
headerHeight = topView.getMeasuredHeight();
//初始状态设置隐藏
topPadding(-headerHeight);
this.setOnScrollListener(this);
this.addHeaderView(topView);
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
//当滑动到底端，并滑动状态为 not scrolling
this.scrollState = scrollState;
}
/**
* 通知父布局，占用的宽，高；
*
* @param view
*/
private void measureView(View view) {
ViewGroup.LayoutParams p = view.getLayoutParams();
if (p == null) {
p = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
}
int width = ViewGroup.getChildMeasureSpec(0, 0, p.width);
int height;
int tempHeight = p.height;
if (tempHeight > 0) {
height = MeasureSpec.makeMeasureSpec(tempHeight,
MeasureSpec.EXACTLY);
} else {
height = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
}
view.measure(width, height);
}
/**
* 设置header 布局上边距；
*
* @param topPadding
*/
private void topPadding(int topPadding) {
topView.setPadding(topView.getPaddingLeft(), topPadding,
topView.getPaddingRight(), topView.getPaddingBottom());
topView.invalidate();
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
this.firstVisibleItem = firstVisibleItem ;
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
// TODO Auto-generated method stub
switch (ev.getAction()) {
//往下
case MotionEvent.ACTION_DOWN:
if (firstVisibleItem == 0) {
isRefresh = true;
startY = (int) ev.getY();
}
break;
//移动
case MotionEvent.ACTION_MOVE:
onMove(ev);
break;
//向上
case MotionEvent.ACTION_UP:
if (state == RELESE) {
state = REFLASHING;
// 加载最新数据；
reflashViewByState();
onRefreshListener.onRefresh();
} else if (state == PULL) {
state = NONE;
isRefresh = false;
reflashViewByState();
}
break;
}
return super.onTouchEvent(ev);
}
/**
* 判断移动过程操作；
*
* @param ev
*/
private void onMove(MotionEvent ev) {
if (!isRefresh) {
return;
}
int tempY = (int) ev.getY();
int space = tempY - startY;
int topPadding = space - headerHeight;
switch (state) {
case NONE:
if (space > 0) {
state = PULL;
reflashViewByState();
}
break;
case PULL:
topPadding(topPadding);
if (space > headerHeight + 30
&& scrollState == SCROLL_STATE_TOUCH_SCROLL) {
state = RELESE;
reflashViewByState();
}
break;
case RELESE:
topPadding(topPadding);
if (space < headerHeight + 30) {
state = PULL;
reflashViewByState();
} else if (space <= 0) {
state = NONE;
isRefresh = false;
reflashViewByState();
}
break;
}
}
/**
* 根据当前状态，改变界面显示；
*/
private void reflashViewByState() {
TextView tip = (TextView) topView.findViewById(R.id.tip);
ImageView arrow = (ImageView) topView.findViewById(R.id.arrow);
ProgressBar progress = (ProgressBar) topView.findViewById(R.id.progress_refresh);
RotateAnimation anim = new RotateAnimation(0, 180,
RotateAnimation.RELATIVE_TO_SELF, 0.5f,
RotateAnimation.RELATIVE_TO_SELF, 0.5f);
anim.setDuration(500);
anim.setFillAfter(true);
RotateAnimation anim1 = new RotateAnimation(180, 0,
RotateAnimation.RELATIVE_TO_SELF, 0.5f,
RotateAnimation.RELATIVE_TO_SELF, 0.5f);
anim1.setDuration(500);
anim1.setFillAfter(true);
switch (state) {
case NONE:
arrow.clearAnimation();
topPadding(-headerHeight);
break;
case PULL:
arrow.setVisibility(View.VISIBLE);
progress.setVisibility(View.GONE);
tip.setText("下拉可以刷新！");
arrow.clearAnimation();
arrow.setAnimation(anim1);
break;
case RELESE:
arrow.setVisibility(View.VISIBLE);
progress.setVisibility(View.GONE);
tip.setText("松开可以刷新！");
arrow.clearAnimation();
arrow.setAnimation(anim);
break;
case REFLASHING:
topPadding(50);
arrow.setVisibility(View.GONE);
progress.setVisibility(View.VISIBLE);
tip.setText("正在刷新...");
arrow.clearAnimation();
break;
}
}
private OnRefreshListener onRefreshListener;
public void setOnRefreshListener(OnRefreshListener onRefreshListener){
this.onRefreshListener = onRefreshListener;
}
/**
* 加载数据接口
* @author Administrator
*
*/
public interface OnRefreshListener{
void onRefresh();
}
/**
* 数据加载完成
*/
@SuppressLint("SimpleDateFormat")
public void refreshComplete(){
state = NONE;
isRefresh = false;
reflashViewByState();
TextView lastupdatetime = (TextView) topView
.findViewById(R.id.lastupdate_time);
SimpleDateFormat format = new SimpleDateFormat("yyyy年MM月dd日 hh:mm:ss");
Date date = new Date(System.currentTimeMillis());
String time = format.format(date);
lastupdatetime.setText(time);
}
}

顶部下拉刷新布局top.xml

[html] view plaincopyprint?

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="10dip"
android:paddingTop="10dip" >
<LinearLayout
android:id="@+id/layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:gravity="center"
android:orientation="vertical" >
<TextView
android:id="@+id/tip"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="下拉可以刷新！" />
<TextView
android:id="@+id/lastupdate_time"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
<ImageView
android:id="@+id/arrow"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toLeftOf="@id/layout"
android:layout_marginRight="20dip"
android:src="@drawable/pull" />
<ProgressBar
android:id="@+id/progress_refresh"
style="?android:attr/progressBarStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toLeftOf="@id/layout"
android:layout_marginRight="20dip"
android:visibility="gone" />
</RelativeLayout>
</LinearLayout>

三.其他文件代码

1.主布局activity_main.xml

[html] view plaincopyprint?

<LinearLayout 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"
android:orientation="vertical"
>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="ListView底部分页刷新和顶部下拉刷新"
android:gravity="center"
android:textSize="18sp"
android:textColor="#FF0000"
android:layout_marginBottom="20dp"
android:layout_marginTop="20dp"/>
<ListView
android:id="@+id/main_lv"
android:layout_width="match_parent"
android:layout_height="match_parent"
></ListView>
</LinearLayout>

2.底部分页布局activity_pagination.xml

[html] view plaincopyprint?

<LinearLayout 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"
android:orientation="vertical"
>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="ListView底部分页刷新"
android:gravity="center"
android:textSize="18sp"
android:textColor="#FF0000"
android:layout_marginBottom="20dp"
android:layout_marginTop="20dp"/>
<com.example.paginationrefreshlistdemo.listview.PaginationListView
android:id="@+id/pagination_lv"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
</LinearLayout>

3.顶部下拉刷新activity_refresh.xml

[html] view plaincopyprint?

<LinearLayout 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"
android:orientation="vertical"
>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="ListView底部分页刷新"
android:gravity="center"
android:textSize="18sp"
android:textColor="#FF0000"
android:layout_marginBottom="20dp"
android:layout_marginTop="20dp"/>
<com.example.paginationrefreshlistdemo.listview.PaginationListView
android:id="@+id/pagination_lv"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
</LinearLayout>

4.Adapter加载布局list_view.xml

[html] view plaincopyprint?

<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" >
<LinearLayout
android:id="@+id/content_ll"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_marginLeft="20dp"
android:gravity="center"
android:orientation="vertical" >
<TextView
android:id="@+id/content_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="亲亲，来一下"
android:textColor="#FF0000" />
<TextView
android:id="@+id/date_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#00FF00" />
</LinearLayout>
<ImageView
android:id="@+id/iv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toLeftOf="@id/content_ll"
android:src="@drawable/emotion" />
</RelativeLayout>

5.实体ApkBean

[html] view plaincopyprint?

package com.example.paginationrefreshlistdemo.bean;
public class ApkBean {
private String content;
private String dateString;
/**
* @return the content
*/
public String getContent() {
return content;
}
/**
* @param content the content to set
*/
public void setContent(String content) {
this.content = content;
}
/**
* @return the dateString
*/
public String getDateString() {
return dateString;
}
/**
* @param dateString the dateString to set
*/
public void setDateString(String dateString) {
this.dateString = dateString;
}
}

6.适配器DemoAdapter

[html] view plaincopyprint?

package com.example.paginationrefreshlistdemo.adapter;
import java.util.List;
import com.example.paginationrefreshlistdemo.R;
import com.example.paginationrefreshlistdemo.bean.ApkBean;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class DemoAdapter extends BaseAdapter {
private List<ApkBean> datas ;
private LayoutInflater mInfalter;
public DemoAdapter(Context context,List<ApkBean> datas){
this.datas = datas;
this.mInfalter = LayoutInflater.from(context);
}
public void updateView( List<ApkBean> datas ){
this.datas = datas;
this.notifyDataSetChanged();
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return datas.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return datas.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
HolderView holderView;
if(convertView == null){
holderView = new HolderView();
convertView = mInfalter.inflate(R.layout.list_view_main, null);
holderView.contentTv = (TextView) convertView.findViewById(R.id.content_tv);
holderView.dateTv = (TextView) convertView.findViewById(R.id.date_tv);
convertView.setTag(holderView);
}else{
holderView =(HolderView) convertView.getTag();
}
holderView.contentTv.setText(datas.get(position).getContent());
if(datas.get(position).getDateString() == null){
holderView.dateTv.setVisibility(View.GONE);
}else{
holderView.dateTv.setVisibility(View.VISIBLE);
holderView.dateTv.setText(datas.get(position).getDateString());
}
return convertView;
}
public class HolderView{
ImageView iv;
TextView contentTv,dateTv;
}
}

7.主函数MainActivity.java,一个ListView中包含底部下拉加载和顶部下拉刷新数据。

[html] view plaincopyprint?

package com.example.paginationrefreshlistdemo.activity;
import java.util.ArrayList;
import java.util.List;
import com.example.paginationrefreshlistdemo.R;
import com.example.paginationrefreshlistdemo.adapter.DemoAdapter;
import com.example.paginationrefreshlistdemo.bean.ApkBean;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
public class MainActivity extends Activity {
private ListView mainLv;
private DemoAdapter demoAdapter;
private List<ApkBean> datas = new ArrayList<ApkBean>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initData();
mainLv =(ListView) this.findViewById(R.id.main_lv);
mainLv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
switch (position) {
case 0:
startActvity(PaginationActivity.class);
break;
case 1:
startActvity(RefreshActivity.class);
break;
}
}
});
showView();
}
private void startActvity(Class<?> clz){
Intent intent = new Intent();
intent.setClass(this, clz);
this.startActivity(intent);
}
private void initData(){
ApkBean apkBean = new ApkBean();
apkBean.setContent("ListView分页刷新");
ApkBean apkBean2 = new ApkBean();
apkBean2.setContent("ListView下拉刷新");
datas.add(apkBean);
datas.add(apkBean2);
}
private void showView(){
if(demoAdapter == null){
demoAdapter = new DemoAdapter(this, datas);
mainLv.setAdapter(demoAdapter);
}else{
demoAdapter.updateView(datas);
}
}
}

8.分页加载PaginationActivity.java,使用PaginationListView

[html] view plaincopyprint?

package com.example.paginationrefreshlistdemo.activity;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import com.example.paginationrefreshlistdemo.R;
import com.example.paginationrefreshlistdemo.adapter.DemoAdapter;
import com.example.paginationrefreshlistdemo.bean.ApkBean;
import com.example.paginationrefreshlistdemo.listview.PaginationListView;
import com.example.paginationrefreshlistdemo.listview.PaginationListView.OnLoadListener;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
public class PaginationActivity extends Activity implements OnLoadListener {
private PaginationListView paginationLv;
private DemoAdapter paginationAdapter;
private List<ApkBean> datas = new ArrayList<ApkBean>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_pagination);
initData();
paginationLv = (PaginationListView) this
.findViewById(R.id.pagination_lv);
paginationLv.setOnLoadListener(this);
paginationLv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
}
});
showView();
}
@SuppressLint("SimpleDateFormat")
private void initData() {
ApkBean apkBean;
String dateString;
long dateLong = new Date().getTime();
for (int i = 0; i < 20; i++) {
apkBean = new ApkBean();
apkBean.setContent("这是一个美好的夜晚 " + i);
dateLong = dateLong + i * 1000 * 6;
dateString = new SimpleDateFormat("yyyy-MM-dd HHmmss")
.format(new Date(dateLong));
apkBean.setDateString(dateString);
datas.add(apkBean);
}
}
/**
* 加载适配器
*/
private void showView() {
if (paginationAdapter == null) {
paginationAdapter = new DemoAdapter(this, datas);
paginationLv.setAdapter(paginationAdapter);
} else {
paginationAdapter.updateView(datas);
}
}
@Override
public void onLoad() {
// 为了显示效果，采用延迟加载
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
initLoadData();
showView();
paginationLv.loadComplete();
}
}, 3000);
}
@SuppressLint("SimpleDateFormat")
private void initLoadData() {
ApkBean apkBean;
String dateString;
long dateLong = new Date().getTime();
for (int i = 0; i < 20; i++) {
apkBean = new ApkBean();
apkBean.setContent("这是一个新的开始 " + i);
dateLong = dateLong + i * 1000 * 6 * 60;
dateString = new SimpleDateFormat("yyyy-MM-dd HHmmss")
.format(new Date(dateLong));
apkBean.setDateString(dateString);
datas.add(apkBean);
}
}
}

9.顶部刷新RefreshActivity.java，使用自定义RefreshListView

[html] view plaincopyprint?

package com.example.paginationrefreshlistdemo.activity;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import com.example.paginationrefreshlistdemo.R;
import com.example.paginationrefreshlistdemo.adapter.DemoAdapter;
import com.example.paginationrefreshlistdemo.bean.ApkBean;
import com.example.paginationrefreshlistdemo.listview.RefreshListView;
import com.example.paginationrefreshlistdemo.listview.RefreshListView.OnRefreshListener;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
public class RefreshActivity extends Activity implements OnRefreshListener{
private RefreshListView refreshLv;
private DemoAdapter refreshAdapter;
private List<ApkBean> datas = new ArrayList<ApkBean>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_refresh);
initData();
refreshLv =(RefreshListView) this.findViewById(R.id.refresh_lv);
refreshLv.setOnRefreshListener(this);
refreshLv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
}
});
showView();
}
@SuppressLint("SimpleDateFormat")
private void initData(){
ApkBean apkBean;
String dateString;
long dateLong = new Date().getTime();
for (int i = 0; i < 20; i++) {
apkBean = new ApkBean();
apkBean.setContent("这是一个刷新的早晨 " + i);
dateLong = dateLong + i * 1000 * 6;
dateString = new SimpleDateFormat("yyyy-MM-dd HHmmss")
.format(new Date(dateLong));
apkBean.setDateString(dateString);
datas.add(apkBean);
}
}
private void showView(){
if(refreshAdapter == null){
refreshAdapter = new DemoAdapter(this, datas);
refreshLv.setAdapter(refreshAdapter);
}else{
refreshAdapter.updateView(datas);
}
}
@Override
public void onRefresh() {
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
initLoadData();
refreshAdapter.updateView(datas);
refreshLv.refreshComplete();
}
}, 3000);
}
@SuppressLint("SimpleDateFormat")
private void initLoadData() {
ApkBean apkBean;
String dateString;
long dateLong = new Date().getTime();
for (int i = 0; i < 5; i++) {
apkBean = new ApkBean();
apkBean.setContent("刷新新的的数据 " + i);
dateLong = dateLong + i * 1000 * 6 * 60;
dateString = new SimpleDateFormat("yyyy-MM-dd HHmmss")
.format(new Date(dateLong));
apkBean.setDateString(dateString);
datas.add(apkBean);
}
}
}

以上就是本文所有内容。

源码下载地址：http://download.csdn.net/detail/a123demi/8147253

0 0