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Android实现简单的分页效果

2019年07月24日  | 移动技术网IT编程  | 我要评论

雷神3:诸神黄昏 迅雷下载,末世兑换高手笔趣阁,九六中文网

本文实例为大家分享了android分页效果的具体代码，供大家参考，具体内容如下

1.实现分页最主要的就是封装分页代码，然后在按钮里实现相关的操作

/**
 * 分页工具
 * 
 * @project app_page
 * @package com.android.dividepage
 * @author chenlin
 * @version 1.0
 * @date 2012年6月2日
 * @note todo
 * @param <t>
 */
public class pagehelper<t> {

 private list<t> alldata; // 所有数据
 private int perpage = 10; // 每页条目
 private int currentpage = 1;// 当前页
 private int pagenum = 1; // 页码
 private list<t> childdata;// 子数据
 private int allnum;// 总共条目

 public pagehelper(list<t> datas, int perpage) {
 this.alldata = datas;
 if (perpage > 0)
  this.perpage = perpage;
 // 如果数据大于10条
 if (alldata != null && alldata.size() > perpage) {
  childdata = alldata.sublist(0, perpage - 1);
 }
 allnum = alldata.size();
 // 如果总数能除断perpage，页数就是余数，否则+1
 pagenum = allnum % perpage == 0 ? (allnum / perpage) : (allnum / perpage + 1);
 }

 public int getcount() {
 return this.allnum;
 }

 public int getcurrentpage() {
 return this.currentpage;
 }

 public int getpagenum() {
 return this.pagenum;
 }

 public int getperpage() {
 return this.perpage;
 }

 public void gotopage(int n) { // 页面跳转
 currentpage = n > pagenum ? pagenum : (n < 1 ? 1 : n);
 }

 public boolean hasnextpage() {// 是否有下一页
 return currentpage < pagenum;
 }

 public boolean hasprepage() {// 是否有前一页
 return currentpage > 1;
 }

 public void headpage() {// 第一页
 currentpage = 1;
 }

 public void lastpage() {// 最后一页
 currentpage = pagenum;
 }

 public void nextpage() {// 下一页
 currentpage = hasnextpage() ? currentpage + 1 : pagenum;
 }

 public void prepage() {// 前一页
 currentpage = hasprepage() ? currentpage - 1 : 1;
 }

 public void setperpage(int perpage) {// 设置上一页面
 this.perpage = perpage;
 }

 /**
 * 获得当前数据
 * @return
 */
 public list<t> currentlist() {
 if (currentpage == 1) {
  childdata = alldata.sublist(0, perpage);
 } else if (currentpage == pagenum) {
  childdata = alldata.sublist(perpage * (pagenum - 1), allnum);
 } else {
  childdata = alldata.sublist(perpage * (currentpage - 1), perpage * currentpage);
 }
 return childdata;
 }

 public void setcurrentpage(int currentpage) {
 this.currentpage = currentpage;
 }

}

2、主页里我根据tab标签把按钮设置进去，然后在click里方法读取，最后根据tag标签就可判断是哪个按钮点击了

/**
 * 分页主页
 * @project app_page
 * @package com.android.dividepage
 * @author chenlin
 * @version 1.0
 * @date 2012年6月2日
 * @note todo
 */
public class mainactivity extends activity implements onclicklistener {

 private listview mlistview;
 //分页按钮
 private button mbtnprepage, mbtnnextpage, mbtnpreitem, mbtnnextitem;
 //显示分页信息
 private textview mtvpageno;

 //数据实现
 private pagehelper<string> mpagedaoimpl;
 private dataadapter madapter;
 private list<string> mdatas;

 //被选着的索引
 private int selectindex = 0;

 private static final int prepage = 0;
 private static final int nextpage = 1;
 private static final int preitem = 2;
 private static final int nextitem = 3;

 @override
 protected void oncreate(bundle savedinstancestate) {
 super.oncreate(savedinstancestate);
 setcontentview(r.layout.activity_main);
 initviews();
 initdatas();
 }

 private void initdatas() {
 //从资源文件里读数据
 mdatas = arrays.aslist(getresources().getstringarray(r.array.channellist));
 //每次读8条数据
 mpagedaoimpl = new pagehelper<string>(mdatas, 8);
 madapter = new dataadapter(this, mpagedaoimpl.currentlist());
 mlistview.setadapter(madapter);
 //设置当前页码与总页码
 mtvpageno.settext(mpagedaoimpl.getcurrentpage() + " / " + mpagedaoimpl.getpagenum());
 }

 private void initviews() {
 mlistview = (listview) findviewbyid(r.id.page_list);
 mbtnprepage = (button) findviewbyid(r.id.pre_page);
 mbtnprepage.settag(prepage);
 mbtnprepage.setonclicklistener(this);
 mbtnnextpage = (button) findviewbyid(r.id.next_page);
 mbtnnextpage.settag(nextpage);
 mbtnnextpage.setonclicklistener(this);
 mbtnpreitem = (button) findviewbyid(r.id.pre_item);
 mbtnpreitem.settag(preitem);
 mbtnpreitem.setonclicklistener(this);
 mbtnnextitem = (button) findviewbyid(r.id.next_item);
 mbtnnextitem.settag(nextitem);
 mbtnnextitem.setonclicklistener(this);

 mtvpageno = (textview) findviewbyid(r.id.pagenum);
 }

 @override
 public void onclick(view v) {
 final int flag = (integer) v.gettag();
 switch (flag) {
 case prepage:// 首页
  headpage();
  break;
 case nextpage:// 尾页
  lastpage();
  break;
 case preitem:// 上一条
  prepage();
  break;
 case nextitem:// 下一条
  nextpage();
  break;
 }
 }

 private void prepage() {
 if (selectindex == 0) {
  if (mpagedaoimpl.getcurrentpage() >= 1) {
  mpagedaoimpl.prepage();
  } 
  madapter.setdata(mpagedaoimpl.currentlist());
  mlistview.setselection(madapter.getcount() - 1);
  mtvpageno.settext(mpagedaoimpl.getcurrentpage() + " / " + mpagedaoimpl.getpagenum());
 } else {
  return;
 }
 }

 private void nextpage() {
 if (mpagedaoimpl.getcurrentpage() <= mpagedaoimpl.getpagenum()) {
  mpagedaoimpl.nextpage();
 } 
 madapter.setdata(mpagedaoimpl.currentlist());
 mlistview.setselection(0);
 mtvpageno.settext(mpagedaoimpl.getcurrentpage() + " / " + mpagedaoimpl.getpagenum());
 }



 private void lastpage() {
 if (mpagedaoimpl.getcurrentpage() != mpagedaoimpl.getpagenum()) {
  mpagedaoimpl.lastpage();
 } 
 madapter.setdata(mpagedaoimpl.currentlist());
 mtvpageno.settext(mpagedaoimpl.getcurrentpage() + " / " + mpagedaoimpl.getpagenum());
 }

 private void headpage() {
 if (mpagedaoimpl.getcurrentpage() != 1) {
  mpagedaoimpl.headpage();
 } 
 madapter.setdata(mpagedaoimpl.currentlist());
 mtvpageno.settext(mpagedaoimpl.getcurrentpage() + " / " + mpagedaoimpl.getpagenum());
 }

}

3、适配器代码，太简单了，我就不说了

public class dataadapter extends baseadapter {

 private context mcontext;
 private list<string> mdatas;

 public dataadapter(context context, list<string> datas) {
 this.mcontext = context;
 this.mdatas = datas;
 }

 @override
 public int getcount() {
 return mdatas == null ? 0 : mdatas.size();
 }

 @override
 public object getitem(int position) {
 return mdatas == null ? null : mdatas.get(position);
 }

 @override
 public long getitemid(int position) {
 return position;
 }

 @override
 public view getview(int position, view convertview, viewgroup parent) {
 viewholder mholder;
 if (convertview == null) {
  convertview = layoutinflater.from(mcontext).inflate(r.layout.channel_item, parent, false);
  mholder = new viewholder();
  mholder.nameview = (textview) convertview.findviewbyid(r.id.channel_name);
  convertview.settag(mholder);
 }
 mholder = (viewholder) convertview.gettag();
 mholder.nameview.settext(mdatas.get(position));
 return convertview;
 }

 static class viewholder {
 public textview nameview;
 }

 public void setdata(list<string> datas) {
 mdatas = datas;
 notifydatasetchanged();
 }
}

4、代码下载：

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持移动技术网。

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