Android中使用PopupWindow 仿微信点赞和评论弹出

微信朋友圈的点赞和评论功能，有2个组成部分：左下角的“更多”按钮；点击该按钮后弹出的对话框；

popupwindow，弹出框使用popupwindow实现，这是点赞和评论的载体，具体要涉及 popupwindow 点击非窗口位置和再次点击消失以及显示位置的问题（根据相应更多按钮的位置确定 popupwindow 的显示位置

package com.example.cmm.helloworld;
import android.app.alertdialog;
import android.content.context;
import android.graphics.drawable.bitmapdrawable;
import android.support.v7.app.appcompatactivity;
import android.os.bundle;
import android.view.layoutinflater;
import android.view.view;
import android.view.viewgroup;
import android.widget.baseadapter;
import android.widget.imageview;
import android.widget.listview;
import android.widget.popupwindow;
import android.widget.textview;
import java.util.arraylist;
import java.util.list;
public class mainactivity extends appcompatactivity {
 private popupwindow mmorepopupwindow;
 private int mshowmorepopupwindowwidth;
 private int mshowmorepopupwindowheight;
 @override
 protected void oncreate(bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.activity_main);
  listview lv = (listview) findviewbyid(r.id.listview);
  lv.setadapter(new myadapter(mainactivity.this, getdata()));
 }
 private list<data> getdata() {
  list<data> data = new arraylist<>();
  data.add(new data(r.drawable.xiaona, "薄荷栗", "我学过跆拳道，都给我跪下唱征服", "昨天"));
  data.add(new data(r.drawable.xueyan, "欣然", "走遍天涯海角，唯有我家风景最好，啊哈哈", "昨天"));
  data.add(new data(r.drawable.leishao, "陈磊_cl", "老子以后要当行长的，都来找我借钱吧，now", "昨天"));
  data.add(new data(r.drawable.yuhong, "永恒依然", "房子车子都到碗里来", "昨天"));
  data.add(new data(r.drawable.lanshan, "蓝珊", "你们这群傻×，我笑而不语", "昨天"));
  return data;
 }
 class myadapter extends baseadapter {
  private list<data> listdata;
  private context context;
  public myadapter(context context, list<data> listdata) {
   this.context = context;
   this.listdata = listdata;
  }
  @override
  public int getcount() {
   return listdata.size();
  }
  @override
  public object getitem(int arg0) {
   return listdata.get(arg0);
  }
  @override
  public long getitemid(int arg0) {
   return arg0;
  }
  @override
  public view getview(int position, view convertview, viewgroup parent) {
   layoutinflater inflater = (layoutinflater) context.getsystemservice(context.layout_inflater_service);
   convertview = inflater.inflate(r.layout.listview_item, null, false);
   // 带赋值区域
   imageview ivportrait = (imageview) convertview.findviewbyid(r.id.portrait);
   textview tvnickname = (textview) convertview.findviewbyid(r.id.nick_name);
   textview tvcontent = (textview) convertview.findviewbyid(r.id.content);
   textview tvcreatedat = (textview) convertview.findviewbyid(r.id.created_at);
   imageview morebtn = (imageview) convertview.findviewbyid(r.id.more_btn);
   // 赋值
   data data = listdata.get(position);
   ivportrait.setimageresource(data.getportraitid());
   tvnickname.settext(data.getnickname());
   tvcontent.settext(data.getcontent());
   tvcreatedat.settext(data.getcreatedat());
   // 更多按钮的点击事件
   morebtn.setonclicklistener(new view.onclicklistener() {
    @override
    public void onclick(view v) {
     showmore(v);
    }
   });
   return convertview;
  }
  /**
   * 弹出点赞和评论框
   *
   * @param morebtnview
   */
  private void showmore(view morebtnview) {
   if (mmorepopupwindow == null) {
    layoutinflater li = (layoutinflater) mainactivity.this.getsystemservice(context.layout_inflater_service);
    view content = li.inflate(r.layout.layout_more, null, false);
    mmorepopupwindow = new popupwindow(content, viewgroup.layoutparams.wrap_content,
      viewgroup.layoutparams.wrap_content);
    mmorepopupwindow.setbackgrounddrawable(new bitmapdrawable());
    mmorepopupwindow.setoutsidetouchable(true);
    mmorepopupwindow.settouchable(true);
    content.measure(view.measurespec.unspecified, view.measurespec.unspecified);
    mshowmorepopupwindowwidth = content.getmeasuredwidth();
    mshowmorepopupwindowheight = content.getmeasuredheight();
    view parent = mmorepopupwindow.getcontentview();
    textview like = (textview) parent.findviewbyid(r.id.like);
    textview comment = (textview) parent.findviewbyid(r.id.comment);
    // 点赞的监听器
    like.setonclicklistener(new view.onclicklistener() {
     @override
     public void onclick(view v) {
      final alertdialog.builder alert = new alertdialog.builder(mainactivity.this);
      alert.settitle("点赞");
      alert.setnegativebutton("取消", null);
      alert.show();
     }
    });
    // 评论的监听器
    comment.setonclicklistener(new view.onclicklistener() {
     @override
     public void onclick(view v) {
      final alertdialog.builder alert = new alertdialog.builder(mainactivity.this);
      alert.settitle("评论");
      alert.setnegativebutton("取消", null);
      alert.show();
     }
    });
   }
   if (mmorepopupwindow.isshowing()) {
    mmorepopupwindow.dismiss();
   } else {
    int heightmorebtnview = morebtnview.getheight();
    mmorepopupwindow.showasdropdown(morebtnview, -mshowmorepopupwindowwidth,
      -(mshowmorepopupwindowheight + heightmorebtnview) / 2);
   }
  }
 }
 class data {
  private int portraitid; // 头像
  private string nickname; // 昵称
  private string content; // 说说
  private string createdat; // 发布时间
  public data(int portraitid, string nickname, string content, string createdat) {
   this.portraitid = portraitid;
   this.nickname = nickname;
   this.content = content;
   this.createdat = createdat;
  }
  public int getportraitid() {
   return portraitid;
  }
  public string getnickname() {
   return nickname;
  }
  public string getcontent() {
   return content;
  }
  public string getcreatedat() {
   return createdat;
  }
 }
}

以上所述是小编给大家介绍的android中使用popupwindow 仿微信点赞和评论弹出，希望对大家有所帮助