Android实现底部半透明弹出框PopUpWindow效果

<?xml version="1.0" encoding="utf-8"?>
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:background="#66fafafa"
 android:orientation="vertical">
 <linearlayout
  android:layout_width="match_parent"
  android:layout_height="122dp"
  android:id="@+id/ll_popupwindow"
  android:background="#ffffff"
  android:layout_alignparentbottom="true"
  android:orientation="vertical"
  >
 <linearlayout
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:layout_margintop="26dp"
  android:orientation="horizontal">

  <textview
   android:layout_width="0dp"
   android:layout_height="wrap_content"
   android:layout_weight="1"
   android:id="@+id/popwindow_facebook"
   android:drawabletop="@mipmap/gif_more_facebook"
   android:drawablepadding="12dp"
   android:gravity="center"
   android:text="facebook"
   android:textcolor="#4d4d4d"
   android:textsize="12sp" />

  <textview
   android:layout_width="0dp"
   android:layout_height="wrap_content"
   android:layout_weight="1"
   android:id="@+id/popwindow_whatsapp"
   android:drawabletop="@mipmap/gif_more_whatsapp"
   android:drawablepadding="12dp"
   android:gravity="center"
   android:text="whatsapp"
   android:visibility="gone"
   android:textcolor="#4d4d4d"
   android:textsize="12sp" />

  <textview
   android:layout_width="0dp"
   android:layout_height="wrap_content"
   android:layout_weight="1"
   android:id="@+id/popwindow_report"
   android:drawabletop="@mipmap/gif_more_report"
   android:drawablepadding="12dp"
   android:gravity="center"
   android:text="report"
   android:textcolor="#4d4d4d"
   android:textsize="12sp" />

 </linearlayout>

 </linearlayout>

 </relativelayout>

/*
 * 在当前页面调用initpopupwindow方法，底部弹出popupwindow
 * 重点在popupwindow的layout最外层布局设置android:background="#66fafafa" 半透明
 * */
 private void initpopupwindow(view root, final string uuid, final string title){
  log.d("click","init popopop");
  //inflate得到布局 ，底部弹出框的view
  final view popview = layoutinflater.from(mcontext).inflate(
    r.layout.layout_bottom_popwindow, null);
  view rootview = root; // 当前页面的根布局
  //创建popupwindow对象 宽高占满页面
  final popupwindow popupwindow = new popupwindow(popview,
    windowmanager.layoutparams.match_parent, windowmanager.layoutparams.match_parent);
  popupwindow.settouchable(true);
  // 设置弹出动画
  popupwindow.setanimationstyle(r.style.anim_edit_text_popup);
  // 显示在根布局的底部
  popupwindow.showatlocation(rootview, gravity.bottom | gravity.left, 0,
    0);
  //点击底部弹出框之外的部分让popupwindow 消失
  popview.setontouchlistener(new view.ontouchlistener() {
   @override
   public boolean ontouch(view v, motionevent event) {
    int height = popview.findviewbyid(r.id.ll_popupwindow).gettop();
    int y=(int) event.gety();
    if(event.getaction()==motionevent.action_up){
     if(y<height){
      popupwindow.dismiss();
     }
    }
    return true;
   }
  });
  //弹出框中控件的点击事件
  textview share_facebook= (textview) popview.findviewbyid(r.id.popwindow_facebook);
  share_facebook.setonclicklistener(new view.onclicklistener() {
   @override
   public void onclick(view v) {
    share_facebook(uuid,title);
    popupwindow.dismiss();
   }
  });

  final textview share_whatsapp= (textview) popview.findviewbyid(r.id.popwindow_whatsapp);
  boolean whatsappfound = checkutils.isappinstalled(mcontext, "com.whatsapp");
  if (whatsappfound) {
   share_whatsapp.setvisibility(view.visible);
   share_whatsapp.setonclicklistener(new view.onclicklistener() {
    @override
    public void onclick(view v) {
     share_whatsapp(uuid,title);
    }
   });
  }

  textview report= (textview) popview.findviewbyid(r.id.popwindow_report);
  report.setonclicklistener(new view.onclicklistener() {
   @override
   public void onclick(view v) {
    intent intent = new intent(mcontext, reportactivity.class);

    intent.putextra("fromch", true);

    intent.putextra("tid", uuid);
    mcontext.startactivity(intent);
    popupwindow.dismiss();<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >

 <translate
  android:duration="100"
  android:fromydelta="0.0"
  android:toydelta="100%" />

</set>
   }  }); }

<style name="anim_edit_text_popup">
  <item name="android:windowenteranimation">@anim/popup_in</item>
  <item name="android:windowexitanimation">@anim/popup_out</item>
</style>

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android" >

 <translate
  android:duration="100"
  android:fromydelta="100.0%"
  android:toydelta="0.0" />

</set>

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >

 <translate
  android:duration="100"
  android:fromydelta="0.0"
  android:toydelta="100%" />

</set>