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Android仿QQ滑动弹出菜单标记已读、未读消息

时间:2021-05-07 16:09     来源/作者:无缘公子

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:

Android仿QQ滑动弹出菜单标记已读、未读消息

1. 创建项目,并导入swipemenulistview类库

Android仿QQ滑动弹出菜单标记已读、未读消息

2. 创建消息实体bean:

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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 +
        ", java" id="highlighter_935481">
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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:

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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。

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