Android组件popupwindow使用方法详解

先看效果： 

现在很多的应用效果都需要做的炫些，像uc，以及天天静听，效果很炫的，源码已经对外开放了，有兴趣的可以去研究下的 

上源码

main.xml

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="fill_parent"
 android:layout_height="500dp"
 android:orientation="vertical" 
 android:background="@android :color/white"
 >

 <include android:id="@+id/top_title"
 
 layout="@layout/title_two_button"/>
 <button 
 android:id="@+id/bb"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:text="button"
 />
</linearlayout>

title_two_button.xml

<?xml version="1.0" encoding="utf-8"?>
<framelayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content" >

 <textview
 android:id="@+id/tvtitle"
 android:layout_width="fill_parent"
 android:layout_height="45dip"
 android:background="@drawable/search_bg"
 android:gravity="center"
 android:text="天下第一"
 android:textcolor="@color/black"
 android:textsize="25dip" />

 <button
 android:id="@+id/btn_title_left"
 android:layout_width="49dip"
 android:layout_height="36dip"
 android:layout_gravity="center_vertical"
 android:background="@drawable/title_button"
 android:textcolor="@color/white" />

 <button
 android:id="@+id/btn_title_right"
 android:layout_width="49dip"
 android:layout_height="36dip"
 android:layout_gravity="right"
 android:layout_marginright="2dip"
 android:layout_margintop="4dip"
 android:background="@drawable/title_button2"
 android:textcolor="@color/white" />

</framelayout>

group_list.xml

<?xml version="1.0" encoding="utf-8"?>
<linearlayout android:orientation="vertical" android:paddingleft="0.0sp" android:paddingright="0.0sp" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_margin="0.0px"
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:background="@drawable/group_bg">

 <imageview 
 android:id="@+id/iv_group_list_bg_divider" 
 android:background="@drawable/group_divider" 
 android:padding="0.0px" 
 android:layout_width="fill_parent" 
 android:layout_height="wrap_content" 
 android:layout_margin="0.0px" />
 <listview 
 android:id="@+id/lvgroup" 
 android:fadingedgelength="0.0sp" 
 android:layout_width="fill_parent" 
 android:layout_height="fill_parent" 
 android:listselector="@drawable/grouplist_item_bg" 
 android:drawselectorontop="true" 
 android:cachecolorhint="#00000000" 
 android:divider="@drawable/group_divider" 
 android:dividerheight="2.0px" 
 android:layout_weight="0.0" />
</linearlayout>

group_item.xml

<?xml version="1.0" encoding="utf-8"?>
<linearlayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="@dimen/group_item_height"
 xmlns:android="http://schemas.android.com/apk/res/android">
 <textview 
 android:gravity="center" 
 android:id="@+id/groupitem" 
 android:layout_width="fill_parent" 
 android:layout_height="fill_parent" 
 style="@style/grouplist_item_textview" />
</linearlayout>

好了，这些都是其中用到的布局文件,开始重头戏

package jk.activity;

import java.util.arraylist;
import java.util.list;

import android.app.activity;
import android.content.context;
import android.graphics.drawable.bitmapdrawable;
import android.os.bundle;
import android.util.log;
import android.view.layoutinflater;
import android.view.view;
import android.view.windowmanager;
import android.widget.adapterview;
import android.widget.adapterview.onitemclicklistener;
import android.widget.arrayadapter;
import android.widget.button;
import android.widget.listview;
import android.widget.popupwindow;
import android.widget.textview;
import android.widget.toast;

public class poupwindowdemoactivity extends activity {

 private popupwindow popupwindow;

 private listview lv_group;

 private view view;

 private view top_title;

 private textview tvtitle;

 private list<string> groups;
 
 private button button;
 public void oncreate(bundle savedinstancestate) {
 super.oncreate(savedinstancestate);
 setcontentview(r.layout.main);
 button = (button)findviewbyid(r.id.bb);
 top_title = this.findviewbyid(r.id.top_title);

 tvtitle = (textview) top_title.findviewbyid(r.id.tvtitle);

 tvtitle.settext("天下第一");

 tvtitle.setonclicklistener(new view.onclicklistener() {

 @override
 public void onclick(view v) {
 showwindow(v);
 }
 });

 }

 /**
 * 显示
 * 
 * @param parent
 */
 private void showwindow(view parent) {

 if (popupwindow == null) {
 layoutinflater layoutinflater = (layoutinflater) getsystemservice(context.layout_inflater_service);

 view = layoutinflater.inflate(r.layout.group_list, null);

 lv_group = (listview) view.findviewbyid(r.id.lvgroup);
 // 加载数据
 groups = new arraylist<string>();
 groups.add("女儿国");
 groups.add("西游");
 groups.add("大话");
 groups.add("大唐");

 groupadapter groupadapter = new groupadapter(this, groups);
 lv_group.setadapter(groupadapter);
 // 创建一个popuwidow对象
 popupwindow = new popupwindow(view, 200, 250);
 }

 // 使其聚集
 popupwindow.setfocusable(true);
 // 设置允许在外点击消失
 popupwindow.setoutsidetouchable(true);

 // 这个是为了点击“返回back”也能使其消失，并且并不会影响你的背景
 popupwindow.setbackgrounddrawable(new bitmapdrawable());
 windowmanager windowmanager = (windowmanager) getsystemservice(context.window_service);
 // 显示的位置为:屏幕的宽度的一半-popupwindow的高度的一半
 int xpos = windowmanager.getdefaultdisplay().getwidth() / 2
 - popupwindow.getwidth() / 2;

 log.i("coder", "windowmanager.getdefaultdisplay().getwidth()/2:"
 + windowmanager.getdefaultdisplay().getwidth() / 2);
 //
 log.i("coder", "popupwindow.getwidth()/2:" + popupwindow.getwidth() / 2);

 log.i("coder", "xpos:" + xpos);

 popupwindow.showasdropdown(parent, xpos, 0);

 lv_group.setonitemclicklistener(new onitemclicklistener() {

 @override
 public void onitemclick(adapterview<?> adapterview, view view,
 int position, long id) {

 toast.maketext(poupwindowdemoactivity.this,
 "groups.get(position)" + groups.get(position), 1000)
 .show();

 if (popupwindow != null) {
 popupwindow.dismiss();
 }
 }
 });
 }
}

在这里还需要用到adapter，用到较多一般有baseadapter，simpleadapter，baseadapter挺强大的，不过simpleadapter扩展性挺不错的，可以满足自定义的需求，如果你理解输入输出流很快就能理解adapter的，他就是装备数据的

package jk.activity;

import java.util.list;



import android.content.context;
import android.view.layoutinflater;
import android.view.view;
import android.view.viewgroup;
import android.widget.baseadapter;
import android.widget.textview;

public class groupadapter extends baseadapter {

 private context context;

 private list<string> list;

 public groupadapter(context context, list<string> list) {

 this.context = context;
 this.list = list;

 }

 @override
 public int getcount() {
 return list.size();
 }

 @override
 public object getitem(int position) {

 return list.get(position);
 }

 @override
 public long getitemid(int position) {
 return position;
 }

 @override
 public view getview(int position, view convertview, viewgroup viewgroup) {

 
 viewholder holder;
 if (convertview==null) {
 convertview=layoutinflater.from(context).inflate(r.layout.group_item_view, null);
 holder=new viewholder();
 
 convertview.settag(holder);
 
 holder.groupitem=(textview) convertview.findviewbyid(r.id.groupitem);
 
 }
 else{
 holder=(viewholder) convertview.gettag();
 }
 holder.groupitem.settext(list.get(position));
 
 return convertview;
 }

 static class viewholder {
 textview groupitem;
 }

}

对于adapter，最重要是getview(int position, view convertview, viewgroup viewgroup)这个方法的，菜已上完，各位慢慢享用。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。