Android仿QQ首页ListView左滑置顶、删除功能

import android.content.context; 
import android.util.attributeset; 
import android.util.log; 
import android.util.typedvalue; 
import android.view.motionevent; 
import android.view.view; 
import android.widget.linearlayout; 
import android.widget.relativelayout; 
import android.widget.scroller; 
import android.widget.textview; 
 
import com.kayak.deletelistview.r; 
 
public class slideview extends linearlayout { 
 
 private static final string tag = "slideview"; 
 
 private context mcontext; 
 private linearlayout mviewcontent; 
 private relativelayout mholder; 
 private scroller mscroller; 
 private onslidelistener monslidelistener; 
 
 private int mholderwidth = 120; 
 
 private int mlastx = 0; 
 private int mlasty = 0; 
 private static final int tan = 2; 
 
 public interface onslidelistener { 
  public static final int slide_status_off = 0; 
  public static final int slide_status_start_scroll = 1; 
  public static final int slide_status_on = 2; 
 
  /** 
   * @param view current slideview 
   * @param status slide_status_on or slide_status_off 
   */ 
  public void onslide(view view, int status); 
 } 
 
 public slideview(context context) { 
  super(context); 
  initview(); 
 } 
 
 public slideview(context context, attributeset attrs) { 
  super(context, attrs); 
  initview(); 
 } 
 
 private void initview() { 
  mcontext = getcontext(); 
  mscroller = new scroller(mcontext); 
 
  setorientation(linearlayout.horizontal); 
  view.inflate(mcontext, r.layout.activity_listview_delete_slide_view_merge, this); 
  mviewcontent = (linearlayout) findviewbyid(r.id.view_content); 
  mholderwidth = math.round(typedvalue.applydimension( 
    typedvalue.complex_unit_dip, mholderwidth, getresources() 
      .getdisplaymetrics())); 
 } 
 
 public void setbuttontext(charsequence text) { 
  ((textview)findviewbyid(r.id.delete)).settext(text); 
 } 
 
 public void setcontentview(view view) { 
  mviewcontent.addview(view); 
 } 
 
 public void setonslidelistener(onslidelistener onslidelistener) { 
  monslidelistener = onslidelistener; 
 } 
 
 public void shrink() { 
  if (getscrollx() != 0) { 
   this.smoothscrollto(0, 0); 
  } 
 } 
 
 public void onrequiretouchevent(motionevent event) { 
  int x = (int) event.getx(); 
  int y = (int) event.gety(); 
  int scrollx = getscrollx(); 
  log.d(tag, "x=" + x + " y=" + y); 
 
  switch (event.getaction()) { 
  case motionevent.action_down: { 
   if (!mscroller.isfinished()) { 
    mscroller.abortanimation(); 
   } 
   if (monslidelistener != null) { 
    monslidelistener.onslide(this, 
      onslidelistener.slide_status_start_scroll); 
   } 
   break; 
  } 
  case motionevent.action_move: { 
   int deltax = x - mlastx; 
   int deltay = y - mlasty; 
   if (math.abs(deltax) < math.abs(deltay) * tan) { 
    break; 
   } 
 
   int newscrollx = scrollx - deltax; 
   if (deltax != 0) { 
    if (newscrollx < 0) { 
     newscrollx = 0; 
    } else if (newscrollx > mholderwidth) { 
     newscrollx = mholderwidth; 
    } 
    this.scrollto(newscrollx, 0); 
   } 
   break; 
  } 
  case motionevent.action_up: { 
   int newscrollx = 0; 
   if (scrollx - mholderwidth * 0.75 > 0) { 
    newscrollx = mholderwidth; 
   } 
   this.smoothscrollto(newscrollx, 0); 
   if (monslidelistener != null) { 
    monslidelistener.onslide(this, 
      newscrollx == 0 ? onslidelistener.slide_status_off 
        : onslidelistener.slide_status_on); 
   } 
   break; 
  } 
  default: 
   break; 
  } 
 
  mlastx = x; 
  mlasty = y; 
 } 
 
 private void smoothscrollto(int destx, int desty) { 
  // 缓慢滚动到指定位置 
  int scrollx = getscrollx(); 
  int delta = destx - scrollx; 
  mscroller.startscroll(scrollx, 0, delta, 0, math.abs(delta) * 3); 
  invalidate(); 
 } 
 
 @override 
 public void computescroll() { 
  if (mscroller.computescrolloffset()) { 
   scrollto(mscroller.getcurrx(), mscroller.getcurry()); 
   postinvalidate(); 
  } 
 } 
 
} 

package com.duguang.baseanimation.ui.listivew.deletelistview; 
 
import android.content.context; 
import android.util.attributeset; 
import android.util.log; 
import android.view.motionevent; 
import android.view.view; 
import android.widget.listview; 
 
import com.duguang.baseanimation.ui.listivew.deletelistview.deletelistviewmainactivity.messageitem; 
 
public class listviewcompat extends listview { 
 
 private static final string tag = "listviewcompat"; 
 
 private slideview mfocuseditemview; 
 
 public listviewcompat(context context) { 
  super(context); 
 } 
 
 public listviewcompat(context context, attributeset attrs) { 
  super(context, attrs); 
 } 
 
 public listviewcompat(context context, attributeset attrs, int defstyle) { 
  super(context, attrs, defstyle); 
 } 
 
 public void shrinklistitem(int position) { 
  view item = getchildat(position); 
 
  if (item != null) { 
   try { 
    ((slideview) item).shrink(); 
   } catch (classcastexception e) { 
    e.printstacktrace(); 
   } 
  } 
 } 
 
 @override 
 public boolean ontouchevent(motionevent event) { 
  switch (event.getaction()) { 
  case motionevent.action_down: { 
   int x = (int) event.getx(); 
   int y = (int) event.gety(); 
   int position = pointtoposition(x, y); 
   log.e(tag, "postion=" + position); 
   if (position != invalid_position) { 
    messageitem data = (messageitem) getitematposition(position); 
    mfocuseditemview = data.slideview; 
    log.e(tag, "focuseditemview=" + mfocuseditemview); 
   } 
  } 
  default: 
   break; 
  } 
 
  if (mfocuseditemview != null) { 
   mfocuseditemview.onrequiretouchevent(event); 
  } 
 
  return super.ontouchevent(event); 
 } 
 
} 

package com.duguang.baseanimation.ui.listivew.deletelistview; 
 
import java.util.arraylist; 
import java.util.list; 
 
import android.view.layoutinflater; 
import android.view.view; 
import android.view.view.onclicklistener; 
import android.view.viewgroup; 
import android.widget.adapterview; 
import android.widget.adapterview.onitemclicklistener; 
import android.widget.baseadapter; 
import android.widget.imageview; 
import android.widget.textview; 
import android.widget.toast; 
 
import com.duguang.baseanimation.ui.base.baseactivity; 
import com.duguang.baseanimation.ui.listivew.deletelistview.slideview.onslidelistener; 
import com.kayak.deletelistview.r; 
 
public class deletelistviewmainactivity extends baseactivity implements onitemclicklistener, onclicklistener, 
  onslidelistener { 
 
 private static final string tag = "mainactivity"; 
 
 private listviewcompat mlistview; 
 
 private list<messageitem> mmessageitems = new arraylist<deletelistviewmainactivity.messageitem>(); 
 
 private slideview mlastslideviewwithstatuson; 
  
 private slideadapter adapter; 
  
 @override 
 public void setview() { 
   setcontentview(r.layout.activity_listview_delete_main); 
   
 } 
 
 @override 
 public void initview() { 
   mlistview = (listviewcompat) findviewbyid(r.id.list); 
 
   for (int i = 0; i < 20; i++) { 
    messageitem item = new messageitem(); 
    if (i % 3 == 0) { 
     item.iconres = r.drawable.delete_default_qq_avatar; 
     item.title = "腾讯新闻"; 
     item.msg = "青岛爆炸满月：大量鱼虾死亡"; 
     item.time = "晚上18:18"; 
    } else { 
     item.iconres = r.drawable.delete_wechat_icon; 
     item.title = "微信团队"; 
     item.msg = "欢迎你使用微信"; 
     item.time = "12月18日"; 
    } 
    mmessageitems.add(item); 
   } 
    
   adapter = new slideadapter(); 
   mlistview.setadapter(adapter); 
   mlistview.setonitemclicklistener(this); 
   
 } 
 
 @override 
 public void setlistener() { 
  // todo auto-generated method stub 
   
 } 
 
 private class slideadapter extends baseadapter { 
 
  private layoutinflater minflater; 
  slideadapter() { 
   super(); 
   minflater = getlayoutinflater(); 
  } 
 
  @override 
  public int getcount() { 
   return mmessageitems.size(); 
  } 
 
  @override 
  public object getitem(int position) { 
   return mmessageitems.get(position); 
  } 
 
  @override 
  public long getitemid(int position) { 
   return position; 
  } 
 
  @override 
  public view getview(final int position, view convertview, viewgroup parent) { 
   viewholder holder; 
   slideview slideview = (slideview) convertview; 
   if (slideview == null) { 
    view itemview = minflater.inflate(r.layout.item_listview_delete, null); 
 
    slideview = new slideview(deletelistviewmainactivity.this); 
    slideview.setcontentview(itemview); 
 
    holder = new viewholder(slideview); 
    slideview.setonslidelistener(deletelistviewmainactivity.this); 
    slideview.settag(holder); 
   } else { 
    holder = (viewholder) slideview.gettag(); 
   } 
   messageitem item = mmessageitems.get(position); 
   item.slideview = slideview; 
   item.slideview.shrink(); 
 
   holder.icon.setimageresource(item.iconres); 
   holder.title.settext(item.title); 
   holder.msg.settext(item.msg); 
   holder.time.settext(item.time); 
   holder.deleteholder.setonclicklistener(new onclicklistener() { 
     
    @override 
    public void onclick(view v) { 
     mmessageitems.remove(position); 
     adapter.notifydatasetchanged(); 
     toast.maketext(deletelistviewmainactivity.this, "删除第" + position+"个条目", 0).show(); 
    } 
   }); 
    
   return slideview; 
  } 
 
 } 
 
 public class messageitem { 
  public int iconres; 
  public string title; 
  public string msg; 
  public string time; 
  public slideview slideview; 
 } 
 
 private static class viewholder { 
  public imageview icon; 
  public textview title; 
  public textview msg; 
  public textview time; 
  public viewgroup deleteholder; 
 
  viewholder(view view) { 
   icon = (imageview) view.findviewbyid(r.id.icon); 
   title = (textview) view.findviewbyid(r.id.title); 
   msg = (textview) view.findviewbyid(r.id.msg); 
   time = (textview) view.findviewbyid(r.id.time); 
   deleteholder = (viewgroup)view.findviewbyid(r.id.holder); 
  } 
 } 
 
 @override 
 public void onitemclick(adapterview<?> parent, view view, int position, 
   long id) { 
  toast.maketext(this, "onitemclick position=" + position, 0).show(); 
   
 } 
 
 @override 
 public void onslide(view view, int status) { 
  if (mlastslideviewwithstatuson != null && mlastslideviewwithstatuson != view) { 
   mlastslideviewwithstatuson.shrink(); 
  } 
 
  if (status == slide_status_on) { 
   mlastslideviewwithstatuson = (slideview) view; 
  } 
 } 
 
 @override 
 public void onclick(view v) { 
  switch (v.getid()) { 
 case r.id.holder: 
   
  break; 
 
 default: 
  break; 
 } 
 } 
 
}