Android仿QQ滑动弹出菜单标记已读、未读消息

在上一篇《android仿微信滑动弹出编辑、删除菜单效果、增加下拉刷新功能》里，已经带着大家学习如何使用swipemenulistview这一开源库实现滑动列表弹出菜单，接下来，将进一步学习，如何为不同的list item呈现不同的菜单，此处我们做一个实例：android 高仿qq滑动弹出菜单标记已读、未读消息，看下效果图：

1. 创建项目，并导入swipemenulistview类库

2. 创建消息实体bean：

public class msg { 
 
  public int id; 
 
  public string title; 
 
  public string desc; 
 
  // false是未读；true是已读 
  public boolean isread; 
 
  @override 
  public string tostring() { 
    return "msg{" + 
        "id=" + id + 
        ", title='" + title + '\'' + 
        ", desc='" + desc + '\'' + 
        ", isread=" + isread + 
        '}'; 
  } 
} 

注： 通过isread字段，我们区分菜单显示“设为已读”“设为未读”；

3. 创建列表显示的adapter，重写其中的getitemviewtype方法：

import android.app.activity; 
import android.view.layoutinflater; 
import android.view.view; 
import android.view.viewgroup; 
import android.widget.baseadapter; 
import android.widget.imageview; 
import android.widget.textview; 
 
import java.util.list; 
 
/** 
 * my msgs list adapter 
 */ 
public class mymsgadapter extends baseadapter { 
 
  private activity mcontext; 
 
  private layoutinflater minflater; 
 
  private list<msg> mdatas; 
 
  public mymsgadapter(activity context, list<msg> datas) { 
    mcontext = context; 
    minflater = layoutinflater.from(mcontext); 
    mdatas = datas; 
  } 
 
  @override 
  public int getcount() { 
    return (mdatas != null ? mdatas.size() : 0); 
  } 
 
  @override 
  public object getitem(int position) { 
    return (mdatas != null ? mdatas.get(position) : null); 
  } 
 
  @override 
  public long getitemid(int position) { 
    return position; 
  } 
 
  @override 
  public int getviewtypecount() { 
    return 2; 
  } 
 
  @override 
  public int getitemviewtype(int position) { 
    msg mymsg = mdatas.get(position); 
    boolean isread = mymsg.isread; 
    if (isread) { 
      return 0; 
    } else { 
      return 1; 
    } 
  } 
 
  @override 
  public view getview(final int position, view convertview, viewgroup parent) { 
    viewholder holder = null; 
    if (convertview == null) { 
      // 下拉项布局 
      convertview = minflater.inflate(r.layout.list_item_my_msg, null); 
 
      holder = new viewholder(); 
 
      holder.img_msg = (imageview) convertview.findviewbyid(r.id.img_msg); 
      holder.text_msg_user_name = (textview) convertview.findviewbyid(r.id.text_msg_user_name); 
      holder.text_msg_infos = (textview) convertview.findviewbyid(r.id.text_msg_infos); 
 
      convertview.settag(holder); 
 
    } else { 
      holder = (viewholder) convertview.gettag(); 
    } 
    final msg mymsg = mdatas.get(position); 
 
    if (mymsg != null) { 
 
      if (mymsg.isread) {//未读 
        holder.img_msg.setimageresource(r.mipmap.readed_msg_img); 
      } else { 
        holder.img_msg.setimageresource(r.mipmap.unread_msg_img); 
      } 
 
      holder.text_msg_user_name.settext(mymsg.title); 
      holder.text_msg_infos.settext(mymsg.desc); 
    } 
 
    return convertview; 
  } 
 
  class viewholder { 
 
    imageview img_msg; 
 
    textview text_msg_user_name; 
 
    textview text_msg_infos; 
  } 
} 

注： 此处重写了父类中的getitemviewtype方法，该方法中，我们根据msg的isread字段来判断返回值的是0还是1； 之后，我们将根据该返回值，来判断list item的菜单是何种类型！

4. 根据itemviewtype，创建滑动菜单：

import android.graphics.color; 
import android.graphics.drawable.colordrawable; 
import android.os.bundle; 
import android.support.v7.app.appcompatactivity; 
import android.util.typedvalue; 
import android.view.view; 
import android.widget.adapterview; 
import android.widget.toast; 
 
import com.apkfuns.logutils.logutils; 
import com.baoyz.swipemenulistview.swipemenu; 
import com.baoyz.swipemenulistview.swipemenucreator; 
import com.baoyz.swipemenulistview.swipemenuitem; 
import com.baoyz.swipemenulistview.swipemenulistview; 
 
import java.util.arraylist; 
import java.util.list; 
 
import butterknife.bind; 
import butterknife.butterknife; 
import butterknife.onitemclick; 
 
public class mainactivity extends appcompatactivity { 
 
  // 方案列表 
  @bind(r.id.listviewmymsgs) 
  public swipemenulistview listviewmymsgs; 
 
  private mymsgadapter msgadapter; 
 
  // 消息集合 
  private list<msg> msgs; 
 
  // 要删除的数据 
  private msg dmsg; 
 
  // 要修改的数据 
  private int opos; 
 
  private msg omymsg; 
 
  @override 
  protected void oncreate(bundle savedinstancestate) { 
    super.oncreate(savedinstancestate); 
    setcontentview(r.layout.activity_main); 
 
    butterknife.bind(this); 
 
    msgs = new arraylist<msg>(); 
 
    msg msg1 = new msg(); 
    msg1.id = 1; 
    msg1.title = "上邪"; 
    msg1.desc = "我欲与君相知，长命无绝衰"; 
    msg1.isread = false; 
 
    msg msg2 = new msg(); 
    msg2.id = 2; 
    msg2.title = "爱在记忆中找你"; 
    msg2.desc = "如果可以恨你，全力痛恨你，连遇上亦要躲避"; 
    msg2.isread = true; 
 
    msgs.add(msg1); 
    msgs.add(msg2); 
 
    msgadapter = new mymsgadapter(this, msgs); 
    listviewmymsgs.setadapter(msgadapter); 
 
    createmenu(); 
  } 
 
  /** 
   * 删除某个消息 
   * 
   * @param position 
   */ 
  private void deletemsg(int position) { 
    // dodeletemsgrequest(string id,handler mhandler, int reqcode) 
    dmsg = msgs.get(position); 
    if (dmsg != null) { 
      toast.maketext(mainactivity.this, "删除 ： " + dmsg, toast.length_short).show(); 
 
      msgs.remove(dmsg); 
      msgadapter.notifydatasetchanged(); 
    } 
  } 
 
  /** 
   * 标记已读和未读 
   * 
   * @param position 
   */ 
  private void readmsg(int position) { 
    //doreadmsgrequest(string id, string isread, handler mhandler, int reqcode) 
    opos = position; 
    omymsg = msgs.get(position); 
    if (omymsg != null) { 
      msgs.get(position).isread = !msgs.get(position).isread; 
 
      msgadapter.notifydatasetchanged(); 
    } 
  } 
 
  private void createmenu() { 
    // step 1. create a menucreator 
    swipemenucreator creator = new swipemenucreator() { 
      @override 
      public void create(swipemenu menu) { 
        switch (menu.getviewtype()) { 
          case 0:// 未读 
            createmenu1(menu); 
            break; 
          case 1:// 已读 
            createmenu2(menu); 
            break; 
        } 
      } 
 
      private void createmenu1(swipemenu menu) { 
        swipemenuitem unreaditem = new swipemenuitem( 
            getapplicationcontext()); 
        unreaditem.setid(1); 
        unreaditem.setbackground(new colordrawable(color.parsecolor("#555555"))); 
        unreaditem.setwidth(dp2px(90)); 
        unreaditem.settitle("标为已读"); 
        unreaditem.settitlesize(16); 
        unreaditem.settitlecolor(color.parsecolor("#ffffff")); 
        menu.addmenuitem(unreaditem); 
 
        swipemenuitem deleteitem = new swipemenuitem( 
            getapplicationcontext()); 
        deleteitem.setid(0); 
        deleteitem.setbackground(new colordrawable(color.parsecolor("#ef4b3a"))); 
        deleteitem.setwidth(dp2px(90)); 
        deleteitem.settitle("删除"); 
        deleteitem.settitlesize(16); 
        deleteitem.settitlecolor(color.parsecolor("#ffffff")); 
        menu.addmenuitem(deleteitem); 
      } 
 
      private void createmenu2(swipemenu menu) { 
        swipemenuitem readeditem = new swipemenuitem( 
            getapplicationcontext()); 
        readeditem.setid(2); 
        readeditem.setbackground(new colordrawable(color.parsecolor("#555555"))); 
        readeditem.setwidth(dp2px(90)); 
        readeditem.settitle("标记未读"); 
        readeditem.settitlesize(16); 
        readeditem.settitlecolor(color.parsecolor("#ffffff")); 
        menu.addmenuitem(readeditem); 
 
        swipemenuitem deleteitem = new swipemenuitem( 
            getapplicationcontext()); 
        deleteitem.setid(0); 
        deleteitem.setbackground(new colordrawable(color.parsecolor("#ef4b3a"))); 
        deleteitem.setwidth(dp2px(90)); 
        deleteitem.settitle("删除"); 
        deleteitem.settitlesize(16); 
        deleteitem.settitlecolor(color.parsecolor("#ffffff")); 
        menu.addmenuitem(deleteitem); 
      } 
    }; 
    // set creator 
    listviewmymsgs.setmenucreator(creator); 
 
    // step 2. listener item click event 
    listviewmymsgs.setonmenuitemclicklistener(new swipemenulistview.onmenuitemclicklistener() { 
      @override 
      public boolean onmenuitemclick(int position, swipemenu menu, int index) { 
 
        swipemenuitem menuitem = menu.getmenuitem(index); 
        int id = menuitem.getid(); 
        switch (id) { 
          case 0: 
            logutils.e("删除 :" + position); 
            deletemsg(position); 
            break; 
          case 1: 
            logutils.e("标记未读 :" + position); 
            readmsg(position); 
            break; 
          case 2: 
            logutils.e("标为已读 :" + position); 
            readmsg(position); 
            break; 
        } 
        return false; 
      } 
    }); 
  } 
 
  @onitemclick(r.id.listviewmymsgs) 
  public void onitemclick(adapterview<?> parent, view view, int position, 
              long id) { 
    msg mymsg = (msg) parent.getadapter().getitem( 
        position); 
    if (mymsg != null) { 
 
      if (mymsg.isread) { // 如果是未读，需要标记为已读 
        readmsg(position); 
      } 
    } 
  } 
 
  private int dp2px(int dp) { 
    return (int) typedvalue.applydimension(typedvalue.complex_unit_dip, dp, 
        getresources().getdisplaymetrics()); 
  } 
} 

注：着重看下swipemenucreator接口中的public void create(swipemenu menu)方法，通过menu.getviewtype()方法，我们可以得到该list item的viewtype，而这个viewtype，使我们刚刚在adapter自己定义的，所以此时，只需要判断自己所定义的viewtype值，并根据viewtype来创建菜单即可！

如此这般，便可实现类似qq滑动弹出菜单标记已读、未读消息功能啦，希望大家喜欢。