Android开发实现可拖动排序的ListView功能【附源码下载】

本文实例讲述了android开发实现可拖动排序的listview功能。分享给大家供大家参考，具体如下：

一、上图

二、简述

1、需要实现的效果是长按右侧可拖动部分布局实现列表项的拖动排序
2、当点击列表项前面的单选按钮时，在该条目右侧显示删除图标，点击该图标删除当前条目。

三、实现思路

借助github上的开源代码drag-sort-listview-master加以改造。

四、主要源码展示

1、activity代码

package com.gengducun.dslvdemo;
import java.util.arraylist;
import android.app.activity;
import android.os.bundle;
import android.widget.listview;
import com.mobeta.android.dslv.dragsortlistview;
public class mainactivity extends activity {
 protected static final string tag = "mainactivity";
 /**产品信息列表**/
 private arraylist<productinfobean> productinfolist;
 /**产品列表控件**/
 private dragsortlistview mdslvproductlist;
 /**产品信息列表*/
 private productlistadapter mproductlistadapter;
 @override
 protected void oncreate(bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.activity_main);
  mdslvproductlist = (dragsortlistview) findviewbyid(r.id.dslv_product_list);
  initproductlist();
  mproductlistadapter = new productlistadapter(productinfolist, this);
  mdslvproductlist.setadapter(mproductlistadapter);
  mdslvproductlist.setdroplistener(ondrop);
  mdslvproductlist.setchoicemode(listview.choice_mode_single);
 }
 private dragsortlistview.droplistener ondrop = new dragsortlistview.droplistener() {
  @override
  public void drop(int from, int to) {
   if (from != to) {
    productinfobean item = (productinfobean) mproductlistadapter.getitem(from);
    mproductlistadapter.remove(item);
    mproductlistadapter.insert(item,from, to);
    mdslvproductlist.movecheckstate(from, to);
   }
  }
 };
 private void initproductlist() {
  productinfolist = new arraylist<productinfobean>();
  productinfobean productinfo1 = new productinfobean("eurusd1");
  productinfobean productinfo2 = new productinfobean("eurusd2");
  productinfobean productinfo3 = new productinfobean("eurusd3");
  productinfobean productinfo4 = new productinfobean("eurusd4");
  productinfobean productinfo5 = new productinfobean("eurusd5");
  productinfobean productinfo6 = new productinfobean("eurusd6");
  productinfobean productinfo7 = new productinfobean("eurusd7");
  productinfolist.add(productinfo1);
  productinfolist.add(productinfo2);
  productinfolist.add(productinfo3);
  productinfolist.add(productinfo4);
  productinfolist.add(productinfo5);
  productinfolist.add(productinfo6);
  productinfolist.add(productinfo7);
 }
}

2、adapter代码

package com.gengducun.dslvdemo;
import java.util.arraylist;
import android.content.context;
import android.util.log;
import android.view.layoutinflater;
import android.view.view;
import android.view.view.onclicklistener;
import android.view.viewgroup;
import android.widget.baseadapter;
import android.widget.imageview;
import android.widget.linearlayout;
import android.widget.radiobutton;
import android.widget.textview;
public class productlistadapter extends baseadapter {
 private static final string tag = "productlistadapter1";
 /**产品信息列表*/
 private arraylist<productinfobean> productinfolist;
 /**上下文*/
 private context mcontext;
 /**布局加载器*/
 private layoutinflater minflater;
 /**布局缓存*/
 private viewholder mholder;
 /**本类适配器对象**/
 private productlistadapter mproductlistadapter1;
 /**选中项位置**/
 private int mselectposition = -1;
 public productlistadapter(arraylist<productinfobean> productinfolist, context context) {
  super();
  this.productinfolist = productinfolist;
  this.mcontext = context;
  this.minflater = layoutinflater.from(context);
  this.mproductlistadapter1 = this;
 }
 @override
 public int getcount() {
  return null == productinfolist ? 0 : productinfolist.size();
 }
 @override
 public object getitem(int position) {
  return productinfolist.get(position);
 }
 @override
 public long getitemid(int position) {
  return position;
 }
 public int getmselectposition() {
  return mselectposition;
 }
 public void setmselectposition(int mselectposition) {
  this.mselectposition = mselectposition;
 }
 /**
  * 删除产品
  * @param productinfobean
  */
 public void remove(productinfobean productinfobean) {
  synchronized (this) {
   productinfolist.remove(productinfobean);
  }
  notifydatasetchanged();
 }
 /**
  * 将产品移动到指定的位置
  * @param productinfobean
  * @param from 移动之前的位置
  * @param to 移动完成之后，该产品所在的位置
  */
 public void insert(productinfobean productinfobean, int from, int to) {
  synchronized (this) {
   log.i(tag, "from=" + from + "  to =" + to);
   if (mselectposition != -1) {//有选中项的前提下
    if ((from < mselectposition && to < mselectposition) || (from > mselectposition && to > mselectposition)) {
     //在选中项之前的位置进行拖拉或者在选中项之后的区域拖拉，不会影响选中项
    } else if (from < mselectposition && to > mselectposition) {
     //将选中项之前的移动到选中项之后的位置,则选中项的索引需要发生变化,应该是选中项的位置-1
     mselectposition = mselectposition - 1;
    } else if (from > mselectposition && to < mselectposition) {
     //将选中项之后的项移动到选中项之前的位置，索引也需要变化,应该是选中项的位置+1
     mselectposition = mselectposition + 1;
    } else if ((from == mselectposition && from > to) || (from == mselectposition && from < to)) {
     //如果将选中项往选中项前面的方向拖，则选中项的索引也需要变化,应该是拖动到的位置
     mselectposition = to;
    } else if ((from < mselectposition && to == mselectposition)) {
     //将选中项之前的移动到当前选中项的位置,索引需要变化,选中项的索引应该是 选中项的值-1
     mselectposition = mselectposition - 1;
    } else if (from > mselectposition && to == mselectposition) {
     //将选中项之后的移动到当前项的位置，索引需要变化，选中项的索引应该是选中项的值+1
     mselectposition = mselectposition + 1;
    }
   }
   productinfolist.add(to, productinfobean);
  }
  notifydatasetchanged();
 }
 @override
 public view getview(int position, view convertview, viewgroup parent) {
  if (null == convertview) {
   convertview = minflater.inflate(r.layout.list_item_product_list_1, null);
   mholder = new viewholder();
   mholder.rbselect = (radiobutton) convertview.findviewbyid(r.id.rb_select);
   mholder.tvpurductname = (textview) convertview.findviewbyid(r.id.tv_product_name);
   mholder.lldraglayout = (linearlayout) convertview.findviewbyid(r.id.drag_handle);
   mholder.ivdrag = (imageview) convertview.findviewbyid(r.id.iv_drag);
   mholder.ivdeleteproduct = (imageview) convertview.findviewbyid(r.id.iv_product_delete);
   convertview.settag(mholder);
  } else {
   mholder = (viewholder) convertview.gettag();
  }
  productinfobean productinfobean = productinfolist.get(position);
  if (null != productinfobean) {
   //设置单选按钮的选中状态
   if (mselectposition == position) {
    mholder.rbselect.setchecked(true);
    mholder.ivdrag.setvisibility(view.gone);
    mholder.ivdeleteproduct.setvisibility(view.visible);
    mholder.ivdeleteproduct.setonclicklistener(new removeitemclicklistener(mselectposition));
   } else {
    mholder.rbselect.setchecked(false);
    mholder.ivdrag.setvisibility(view.visible);
    mholder.ivdeleteproduct.setvisibility(view.gone);
   }
   mholder.rbselect.setonclicklistener(new productclicklistener(position));
   //设置产品名称
   if (null != productinfobean.getproductname() && !("".equals(productinfobean.getproductname()))) {
    mholder.tvpurductname.settext(productinfobean.getproductname());
   }
  }
  return convertview;
 }
 class viewholder {
  radiobutton rbselect;
  textview tvpurductname;
  linearlayout lldraglayout;
  imageview ivdrag;
  imageview ivdeleteproduct;
 }
 /**
  * 单选按钮事件监听
  * @author wilson
  */
 class productclicklistener implements onclicklistener {
  private int position;
  public productclicklistener(int position) {
   super();
   this.position = position;
  }
  @override
  public void onclick(view v) {
   if (mselectposition == position) {
    mselectposition = -1;
   } else {
    mselectposition = position;
   }
   log.i(tag, "mselectposition=" + mselectposition + " position=" + position);
   mproductlistadapter1.notifydatasetchanged();
  }
 }
 /**
  * 删除当前产品项监听事件
  */
 class removeitemclicklistener implements onclicklistener {
  private int position;
  public removeitemclicklistener(int position) {
   super();
   this.position = position;
  }
  @override
  public void onclick(view v) {
   //1、删除集合中的数据
   productinfolist.remove(position);
   //2、删除服务器端的数据
   mproductlistadapter1.notifydatasetchanged();
   //
   mselectposition = -1;
  }
 }
}

四、源码

完整实例代码点击此处本站下载。

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希望本文所述对大家android程序设计有所帮助。