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ListView实现下拉刷新加载更多的实例代码(直接拿来用)

程序员文章站 2024-03-05 08:16:30
listview api bixu 好好看看 mnewsadapter.notifydatasetchanged();//刷新listview 自定义的refreash...

listview api bixu 好好看看

mnewsadapter.notifydatasetchanged();//刷新listview

自定义的refreashlistview

package com.itguang.dell_pc.myapplication.view;
import android.content.context;
import android.util.attributeset;
import android.view.motionevent;
import android.view.view;
import android.view.animation.animation;
import android.view.animation.rotateanimation;
import android.widget.abslistview;
import android.widget.imageview;
import android.widget.listview;
import android.widget.progressbar;
import android.widget.textview;
import com.itguang.dell_pc.myapplication.r;
import java.text.simpledateformat;
import java.util.date;
/**
* 作者: 小光哥 on 2016/7/7.
* 邮箱: 1445037803@qq.com
* 修订历史:
* 描述:
*         ┏┓   ┏┓
*        ┏┛┻━━━┛┻┓━━━━┻┓
*        ┃       ┃
*        ┃   ━   ┃
*        ┃ >   < ┃
*        ┃       ┃
*        ┃... ⌒ ... ┃
*        ┃       ┃
*        ┗━┓   ┏━┛
*          ┃   ┃ code is far away from bug with the animal protecting
*          ┃ 史 ┃ 神兽保佑,代码无bug
*          ┃ 诗 ┃
*          ┃ 之 ┃
*          ┃ 宠 ┃
*          ┃   ┃
*          ┃   ┗━━━┓
*          ┃bug天敌   ┣┓┣┓┣┓┣┓┣┓
*          ┃       ┏┛
*          ┗┓┓┏━┳┓┏┛
*           ┃┫┫ ┃┫┫
*           ┗┻┛ ┗┻┛
*/
public class refreshlistview extends listview implements abslistview.onscrolllistener {
private static final int state_pull_refresh = 0;// 下拉刷新
private static final int state_release_refresh = 1;// 松开刷新
private static final int state_refreshing = 2;// 正在刷新
private int mcurrrentstate = state_pull_refresh;// 当前状态
private view mheaderview;
private textview tvtitle;
private textview tvtime;
private progressbar pbprogress;
private imageview ivarrow;
private rotateanimation animup;
private rotateanimation animdown;
private int starty = -1;// 滑动起点的y坐标
private int endy;
private int measuredheight;
private int mfooterviewheight;
private view footerview;
public refreshlistview(context context) {
super(context);
initheaderview();
initfooterview();
}
public refreshlistview(context context, attributeset attrs) {
super(context, attrs);
initheaderview();
initfooterview();
}
public refreshlistview(context context, attributeset attrs, int defstyleattr) {
super(context, attrs, defstyleattr);
initheaderview();
initfooterview();
}
/**
* 初始化头布局
*/
private void initheaderview() {
mheaderview = view.inflate(getcontext(), r.layout.refeeash_header, null);
this.addheaderview(mheaderview);
tvtitle = (textview) mheaderview.findviewbyid(r.id.tv_title);
tvtime = (textview) mheaderview.findviewbyid(r.id.tv_time);
pbprogress = (progressbar) mheaderview.findviewbyid(r.id.pb_progress);
ivarrow = (imageview) mheaderview.findviewbyid(r.id.iv_arr);
mheaderview.measure(0, 0);//先测量再拿到它的高度
measuredheight = mheaderview.getmeasuredheight();
mheaderview.setpadding(0, -measuredheight, 0, 0);
initarrowanim();
tvtime.settext("最后刷新时间:" + getcurrenttime());
}
/**
* 初始化脚布局
*/
public void initfooterview() {
footerview = view.inflate(getcontext(), r.layout.refreash_listview_footer, null);
this.addfooterview(footerview);
footerview.measure(0, 0);
mfooterviewheight = footerview.getmeasuredheight();
footerview.setpadding(0, -mfooterviewheight, 0, 0);//默认隐藏脚布局
this.setonscrolllistener(this);
}
private boolean isloadingmore;
@override
public void onscrollstatechanged(abslistview view, int scrollstate) {
if (scrollstate == scroll_state_fling || scrollstate == scroll_state_idle) {
if (getlastvisibleposition() == getcount() - 1 && !isloadingmore) {//滑倒最后
system.out.println("到底了......");
footerview.setpadding(0, 0, 0, 0);
setselection(getcount() - 1);//改变listview的显示位置
isloadingmore = true;
if (mlistener != null) {
mlistener.onloadmore();
}
}
}
}
@override
public void onscroll(abslistview view, int firstvisibleitem, int visibleitemcount, int totalitemcount) {
}
@override
public boolean ontouchevent(motionevent ev) {
switch (ev.getaction()) {
case motionevent.action_down:
starty = (int) ev.getrawy();
break;
case motionevent.action_move:
if (starty == -1) {//有时候不会响应 motionevent.action_down 事件,这是要重新获取starty坐标
starty = (int) ev.getrawy();
}
//当正在刷新的时候,跳出循环,不再执行下面逻辑
if (mcurrrentstate == state_release_refresh) {
break;
}
endy = (int) ev.getrawy();
int dy = endy - starty;//计算手指滑动距离
if (dy > 0 && getfirstvisibleposition() == 0) {// 只有下拉并且当前是第一个item,才允许下拉
int padding = dy - measuredheight;//计算padding
mheaderview.setpadding(0, padding, 0, 0);//设置当前padding
if (padding > 0 && mcurrrentstate != state_release_refresh) {
mcurrrentstate = state_release_refresh;
refreshstate();
} else if (padding < 0 && mcurrrentstate != state_pull_refresh) {// 改为下拉刷新状态
mcurrrentstate = state_pull_refresh;
refreshstate();
}
return true;
}
break;
case motionevent.action_up:
starty = -1;//手指抬起重置
//当状态是松开刷新时抬起了手指,正在刷新
if (mcurrrentstate == state_release_refresh) {
mcurrrentstate = state_refreshing;// 正在刷新
mheaderview.setpadding(0, 0, 0, 0);// 显示
refreshstate();
} else if (mcurrrentstate == state_pull_refresh) {
mheaderview.setpadding(0, -measuredheight, 0, 0);// 隐藏
}
break;
default:
break;
}
return super.ontouchevent(ev);
}
private string getcurrenttime() {
simpledateformat format = new simpledateformat("yyyy-mm-dd hh:mm:ss");
string currenttime = format.format(new date());
return currenttime;
}
private void initarrowanim() {
//初始化箭头动画
animup = new rotateanimation(0, -180, animation.relative_to_self, 0.5f, animation.relative_to_self, 0.5f);
animup.setduration(500);
animup.setfillafter(true);//保持状态
//箭头向下动画
animdown = new rotateanimation(-180, 0, animation.relative_to_self, 0.5f, animation.relative_to_self, 0.5f);
animdown.setduration(500);
animdown.setfillafter(true);
}
/**
* 刷新下拉控件的布局
*/
private void refreshstate() {
switch (mcurrrentstate) {
case state_pull_refresh:
tvtitle.settext("下拉刷新");
ivarrow.setvisibility(view.visible);
pbprogress.setvisibility(view.invisible);
ivarrow.startanimation(animdown);
break;
case state_release_refresh:
tvtitle.settext("松开刷新");
ivarrow.setvisibility(view.visible);
pbprogress.setvisibility(view.invisible);
ivarrow.startanimation(animup);
break;
case state_refreshing:
tvtitle.settext("正在刷新...");
ivarrow.clearanimation();// 必须先清除动画,才能隐藏
ivarrow.setvisibility(view.invisible);
pbprogress.setvisibility(view.visible);
if (mlistener != null) {
mlistener.onrefreash();
}
break;
default:
break;
}
}
onrefreashlistener mlistener;
public void setonrefreashlistener(onrefreashlistener listener) {
mlistener = listener;
}
public interface onrefreashlistener {
void onrefreash();
void onloadmore();
}
/**
* 收起下拉刷新的控件
*/
public void onrefreashcomplete() {
if (isloadingmore) {
footerview.setpadding(0, -mfooterviewheight, 0, 0);//隐藏脚布局
isloadingmore = false;
} else {
mcurrrentstate = state_pull_refresh;
tvtitle.settext("下拉刷新");
ivarrow.setvisibility(view.visible);
pbprogress.setvisibility(view.invisible);
mheaderview.setpadding(0, -measuredheight, 0, 0);//隐藏
}
}
public void nofooterview() {
footerview.setpadding(0, mfooterviewheight, 0, 0);//隐藏脚布局
}
}

代码中引用refreashlistview

package com.itguang.dell_pc.myapplication.base;
import android.app.activity;
import android.support.v4.view.pageradapter;
import android.support.v4.view.viewpager;
import android.text.textutils;
import android.view.view;
import android.view.viewgroup;
import android.widget.baseadapter;
import android.widget.imageview;
import android.widget.listview;
import android.widget.textview;
import android.widget.toast;
import com.google.gson.gson;
import com.itguang.dell_pc.myapplication.r;
import com.itguang.dell_pc.myapplication.domain.newsdata;
import com.itguang.dell_pc.myapplication.domain.tabdata;
import com.itguang.dell_pc.myapplication.globe.globecontents;
import com.itguang.dell_pc.myapplication.view.refreshlistview;
import com.lidroid.xutils.bitmaputils;
import com.lidroid.xutils.httputils;
import com.lidroid.xutils.viewutils;
import com.lidroid.xutils.exception.httpexception;
import com.lidroid.xutils.http.responseinfo;
import com.lidroid.xutils.http.callback.requestcallback;
import com.lidroid.xutils.http.client.httprequest;
import com.lidroid.xutils.view.annotation.viewinject;
import com.viewpagerindicator.circlepageindicator;
import java.util.arraylist;
/**
* 作者: 小光哥 on 2016/4/22.
* 邮箱: 1445037803@qq.com
* 修订历史:
* 描述:
*         ┏┓   ┏┓
*        ┏┛┻━━━┛┻┓━━━━┻┓
*        ┃       ┃
*        ┃   ━   ┃
*        ┃ >   < ┃
*        ┃       ┃
*        ┃... ⌒ ... ┃
*        ┃       ┃
*        ┗━┓   ┏━┛
*          ┃   ┃ code is far away from bug with the animal protecting
*          ┃ 史 ┃ 神兽保佑,代码无bug
*          ┃ 诗 ┃
*          ┃ 之 ┃
*          ┃ 宠 ┃
*          ┃   ┃
*          ┃   ┗━━━┓
*          ┃bug天敌   ┣┓┣┓┣┓┣┓┣┓
*          ┃       ┏┛
*          ┗┓┓┏━┳┓┏┛
*           ┃┫┫ ┃┫┫
*           ┗┻┛ ┗┻┛
*/
/**
* 也签详情页
*/
public class tabdetailpager extends basemenudetailpager implements viewpager.onpagechangelistener {
/**
* @param activity
* @param newstabdata
*/
newsdata.newstabdata mtabdata;
private string murl;
private tabdata mtabdetaildata;
@viewinject(r.id.vp_news)
private viewpager mviewpager;
@viewinject(r.id.lv_newslist)
private refreshlistview newslistview;//新闻列表
@viewinject(r.id.tv_title)
private textview tvtitle;//新闻标题
@viewinject(r.id.indicator)
private circlepageindicator indicator;//头条新闻指示器
private arraylist<tabdata.topnewsdata> mtopnewslist;//新闻数据集合
private int[] images;
private arraylist<tabdata.tabnewsdata> mnewslist;//新闻数据集合
private string mmoreurl;
private newsadapter mnewsadapter;
public tabdetailpager(activity activity, newsdata.newstabdata newstabdata) {
super(activity);
mtabdata = newstabdata;
murl = globecontents.server_url + mtabdata.url;
}
@override
public view initviews() {
images = new int[]{r.drawable.topnews1, r.drawable.topnews21, r.drawable.topnews31, r.drawable.topimage};
view view = view.inflate(mactivity, r.layout.tab_detail_pager, null);
view headerview = view.inflate(mactivity, r.layout.list_header_topnews, null);//加载头布局
// textview tvtitle = (textview) view.findviewbyid(r.id.tv_title);
//事件注入
viewutils.inject(this, view);
viewutils.inject(this, headerview);
mviewpager.addonpagechangelistener(this);
//将肥头条新闻以头布局形式加载到listview中
newslistview.addheaderview(headerview);
//设置下拉刷新监听
newslistview.setonrefreashlistener(new refreshlistview.onrefreashlistener() {
@override
public void onrefreash() {
getdatafromserver();
}
@override
public void onloadmore() {
if (mmoreurl != null) {
getmoredatafromserver();
} else {
toast.maketext(mactivity, "没有更多数据了", toast.length_short).show();
newslistview.onrefreashcomplete();
// newslistview.nofooterview();
}
}
});
return view;
}
@override
public void initdata() {
getdatafromserver();//这是一个异步的,
}
private void getdatafromserver() {
httputils utils = new httputils();
utils.send(httprequest.httpmethod.get, murl, new requestcallback<string>() {
@override
public void onsuccess(responseinfo<string> responseinfo) {
string result = (string) responseinfo.result;
// system.out.println("页签详情页返回结果:+++++++++++++++++++" + result);
prasedata(result, false);
newslistview.onrefreashcomplete();
}
@override
public void onfailure(httpexception e, string s) {
toast.maketext(mactivity, "获取tabdetaildata失败!", toast.length_short).show();
// error.printstacktrace();
}
});
}
/**
* 加载下一页数据
*/
private void getmoredatafromserver() {
httputils utils = new httputils();
utils.send(httprequest.httpmethod.get, mmoreurl, new requestcallback<string>() {
@override
public void onsuccess(responseinfo<string> responseinfo) {
string result = (string) responseinfo.result;
// system.out.println("页签详情页返回结果:+++++++++++++++++++" + result);
prasedata(result, true);
newslistview.onrefreashcomplete();
}
@override
public void onfailure(httpexception e, string s) {
toast.maketext(mactivity, "获取tabdetaildata失败!", toast.length_short).show();
// error.printstacktrace();
}
});
}
/**
* 把json字符串解析成为json对象
*
* @param result 要解析的的json字符串
*/
private void prasedata(string result, boolean isloadmore) {
gson gson = new gson();
mtabdetaildata = gson.fromjson(result, tabdata.class);//返回tabdata对象
system.out.println("页签详情页:+++++++++++++++++++++" + mtabdata);
//处理更多页面的逻辑
final string more = mtabdetaildata.data.more;
if (!textutils.isempty(more)) {
mmoreurl = globecontents.server_url + more;
} else {
mmoreurl = null;
}
if (!isloadmore) {
mtopnewslist = mtabdetaildata.data.topnews;
mnewslist = mtabdetaildata.data.news;
if (mtopnewslist != null) {
mviewpager.setadapter(new topnewsadapter());
indicator.setonpagechangelistener(this);
indicator.setviewpager(mviewpager);//在设置完适配器后,在设置指示器
indicator.setsnap(true);//设置快照显示
indicator.onpageselected(0);//indicator会自作聪明,离开时会记录当前位置
tvtitle.settext(mtopnewslist.get(0).title);
}
mnewsadapter = new newsadapter();
//填充新闻列表
if (mnewslist != null) {
newslistview.setadapter(mnewsadapter);
}
} else {//如果是加载下一页,需要将数据追加给原来的集合
arraylist<tabdata.tabnewsdata> news = mtabdetaildata.data.news;
mnewslist.addall(news);
mnewsadapter.notifydatasetchanged();//刷新listview
}
}
@override
public void onpagescrolled(int position, float positionoffset, int positionoffsetpixels) {
}
@override
public void onpageselected(int position) {//更新头条新闻标题
tabdata.topnewsdata topnewsdata = mtopnewslist.get(position);
tvtitle.settext(topnewsdata.title);
}
@override
public void onpagescrollstatechanged(int state) {
}
/**
* listview适配器
*/
class newsadapter extends baseadapter {
private final bitmaputils utils;
newsadapter() {
utils = new bitmaputils(mactivity);
utils.configdefaultloadingimage(r.drawable.pic_item_list_default);
}
@override
public int getcount() {
return mnewslist.size();
}
@override
public object getitem(int position) {
return mnewslist.get(position);
}
@override
public long getitemid(int position) {
return position;
}
@override
public view getview(int position, view convertview, viewgroup parent) {
viewholder holder;
if (convertview == null) {
convertview = view.inflate(mactivity, r.layout.list_news_item, null);
holder = new viewholder();
holder.ivpic = (imageview) convertview.findviewbyid(r.id.iv_pic);
holder.tvtitle = (textview) convertview.findviewbyid(r.id.tv_title);
holder.tvdate = (textview) convertview.findviewbyid(r.id.tv_date);
convertview.settag(holder);
} else {
holder = (viewholder) convertview.gettag();
}
tabdata.tabnewsdata item = (tabdata.tabnewsdata) getitem(position);
holder.tvtitle.settext(item.title);
holder.tvdate.settext(item.pubdate);
utils.display(holder.ivpic, item.listimage);
return convertview;
}
}
static class viewholder {
public textview tvtitle;
public textview tvdate;
public imageview ivpic;
}
/**
* viewpager适配器
*/
class topnewsadapter extends pageradapter {
private bitmaputils bitmaputils;
topnewsadapter() {
bitmaputils = new bitmaputils(mactivity);
bitmaputils.configdefaultloadingimage(r.drawable.topnews_item_default);//设置默认图片
}
@override
public int getcount() {
return mtabdetaildata.data.topnews.size();
}
@override
public boolean isviewfromobject(view view, object object) {
return view == object;
}
@override
public object instantiateitem(viewgroup container, int position) {
imageview imageview = new imageview(mactivity);
imageview.setimageresource(images[position]);
imageview.setscaletype(imageview.scaletype.fit_xy);//基于控件大小填充图片
// tabdata.topnewsdata topnewsdata = mtopnewslist.get(position);
// bitmaputils.display(imageview,mtabdetaildata.data.topnews.get(position).url);
container.addview(imageview);
return imageview;
}
@override
public void destroyitem(viewgroup container, int position, object object) {
container.removeview((view) object);
}
}
}

以上所述是小编给大家介绍的listview实现下拉刷新加载更多的实例代码(直接拿来用)的全部叙述,希望对大家有所帮助