Android仿Iphone屏幕底部弹出半透明PopupWindow效果

 <?xml version="1.0" encoding="utf-8"?>
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  >
  <button 
    android:id="@+id/button"
    android:text="popupwindow"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
  />
</relativelayout> 

 <?xml version="1.0" encoding="utf-8"?>
<resources>
  <style name="popupanimation" parent="android:animation">
 <item name="android:windowenteranimation">@anim/in</item>
 <item name="android:windowexitanimation">@anim/out</item>
 </style>
</resources> 

popupwindow.xml如下:
 <?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="match_parent"
  android:background="#b5555555" >

  <linearlayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignparentbottom="true"
    android:layout_marginbottom="12dip"
    android:paddingleft="10dip"
    android:paddingright="10dip"
    android:orientation="vertical" >
    <button
      android:id="@+id/confirmbutton"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:layout_gravity="center"
      android:text="确定"/>

    <button
      android:id="@+id/canclebutton"
      android:layout_margintop="12dip"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:layout_gravity="center"
      android:text="取消" />
  </linearlayout>

</relativelayout> 

 <?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
  <translate
    android:fromydelta="5000"
    android:toydelta="0"
    android:duration="1500"
  />
</set> 

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
  <translate
    android:fromydelta="0"
    android:toydelta="5000"
    android:duration="1500"
  />
</set> 

 import android.app.activity;
import android.graphics.drawable.bitmapdrawable;
import android.os.bundle;
import android.view.gravity;
import android.view.layoutinflater;
import android.view.view;
import android.view.view.onclicklistener;
import android.view.viewgroup.layoutparams;
import android.widget.button;
import android.widget.popupwindow;
/**
 * demo描述:
 * 仿iphone从屏幕底部弹出半透明的popupwindow
 */
public class popupwindowtestactivity extends activity {
 private button button;
  private button confirmbutton;
  private button canclebutton;
  private popupwindow popupwindow;
  private view popupwindowview;
  @override
  public void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.main);
    init();
  }
  private void init(){
    button=(button) findviewbyid(r.id.button);
    button.setonclicklistener(new buttononclicklistener());
  }

 private class buttononclicklistener implements onclicklistener {
 @override
 public void onclick(view v) {
  switch (v.getid()) {
  case r.id.button:
  layoutinflater inflater = (layoutinflater) getsystemservice(layout_inflater_service);
  popupwindowview = inflater.inflate(r.layout.popupwindow, null);
  popupwindow = new popupwindow(popupwindowview,layoutparams.fill_parent, layoutparams.fill_parent,true);
  popupwindow.setbackgrounddrawable(new bitmapdrawable());
  //设置popupwindow的弹出和消失效果
  popupwindow.setanimationstyle(r.style.popupanimation);
  confirmbutton = (button) popupwindowview.findviewbyid(r.id.confirmbutton);
  confirmbutton.setonclicklistener(new buttononclicklistener());
  canclebutton = (button) popupwindowview.findviewbyid(r.id.canclebutton);
  canclebutton.setonclicklistener(new buttononclicklistener());
  popupwindow.showatlocation(confirmbutton, gravity.center, 0, 0);
  break;
  case r.id.confirmbutton:
  system.out.println("点击了确定按钮");
  break;
  case r.id.canclebutton:
  popupwindow.dismiss();
  break;
  default:
  break;
  }

 }}
}