PopupWindow简单使用

如图是效果图

当点击 “点我”的按钮是   会弹出 如图的 弹窗

补充为PopupWindow设置一个显示动画和消失的动画

先在anim的文件下分别设置显示和消失的动画

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

    <translate
        android:duration="500"
        android:fromXDelta="0%"
        android:toXDelta="0%"
        android:fromYDelta="100%"
        android:toYDelta="0%" />
       <!--  <alpha
            android:fromAlpha="0.0"
            android:toAlpha="1.0"
            android:duration="500"
            android:startOffset="500"/> -->

</set>

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:fromXDelta="0"
        android:toXDelta="0"
        android:fromYDelta="0"
        android:toYDelta="100%"
        android:duration="500" />
</set> 

再在style内写其他的

    <style name="popwin_anim_style">
        <item name="android:windowEnterAnimation">@anim/popshow</item>
        <item name="android:windowExitAnimation">@anim/pophide</item>
    </style>

            //创建PopupWindow实例，同时传入弹出窗口的显示高度和宽度以及是否设置焦点
            popupWindow = new PopupWindow(infView,LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT,true);
            //如果不设置PopupWindow背景，无论是点击外部区域还是Back键都没法dismiss弹窗
            popupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
            //设置显示的动画
            popupWindow.setAnimationStyle(R.style.popwin_anim_style);

主代码如下    布局xml  就是只有一个 Button

 package org.xml.popdemo;

 import ogg.huanxin.huadong.R;
 import android.app.Activity;
 import android.os.Bundle;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;

 public class MainPopWindow extends Activity implements OnClickListener {
     private Button popButton;
     private PopWindowForAttr popWindowForAttr;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         // TODO Auto-generated method stub
         super.onCreate(savedInstanceState);
         super.setContentView(R.layout.main_popwindow);
         popButton=(Button)super.findViewById(R.id.popbutton);
         popButton.setOnClickListener(this);
         popWindowForAttr = new PopWindowForAttr(this);
     }

     @Override
     public void onClick(View v) {
         // TODO Auto-generated method stub
         switch (v.getId()) {
         case R.id.popbutton:
             popWindowForAttr.showAsDropDown(v);
             break;
         default:
             break;

         }
     }
 }

 package org.xml.popdemo;

 import ogg.huanxin.huadong.R;
 import android.app.ActionBar.LayoutParams;
 import android.content.Context;
 import android.graphics.Color;
 import android.graphics.drawable.ColorDrawable;
 import android.view.Gravity;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;
 import android.widget.ImageButton;
 import android.widget.PopupWindow;
 import android.widget.TextView;
 import android.widget.Toast;
 import android.widget.PopupWindow.OnDismissListener;

 public class PopWindowForAttr implements OnClickListener, OnDismissListener {
     private Context context;
     private PopupWindow popupWindow;
     private Button addCart, doCart;
     private final int AddReduce = 1;
     private TextView Popreduce, Popnum, Popadd;
     private ImageButton deleteButton;

     public PopWindowForAttr(Context context) {
         this.context = context;
         // 自定义的一个控件作为显示内容
         View contentView = LayoutInflater.from(context).inflate(
                 R.layout.popupwindowdemo, null);
         //
         addCart = (Button) contentView.findViewById(R.id.addCart);
         doCart = (Button) contentView.findViewById(R.id.doCart);
         Popreduce = (TextView) contentView.findViewById(R.id.pop_reduce);
         Popnum = (TextView) contentView.findViewById(R.id.pop_num);
         Popadd = (TextView) contentView.findViewById(R.id.pop_add);
         deleteButton = (ImageButton) contentView.findViewById(R.id.delete);
         // 各组件绑定事件
         addCart.setOnClickListener(this);
         doCart.setOnClickListener(this);
         Popreduce.setOnClickListener(this);
         Popadd.setOnClickListener(this);
         deleteButton.setOnClickListener(this);
         // 将加载的视图view载入PopubWindow,并且设置popupwindow这个组件的动画效果
         popupWindow = new PopupWindow(contentView, LayoutParams.MATCH_PARENT,
                 LayoutParams.WRAP_CONTENT, true);
         // 如果不设置PopupWindow的背景，无论是点击外部区域还是Back键都无法dismiss弹框
         popupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
         // 当popWindow消失时的监听
         popupWindow.setOnDismissListener(this);
     }

     public void showAsDropDown(View v) {
         // showAsDropDown(View anchor)：相对某个控件的位置（正左下方），无偏移
         // showAsDropDown(View anchor, int xoff, int yoff)：相对某个控件的位置，有偏移
         // showAtLocation(View parent, int gravity, int x, int
         // y)：相对于父控件的位置（例如正中央Gravity.CENTER，下方Gravity.BOTTOM等），可以设置偏移或无偏移
         popupWindow.showAtLocation(v, Gravity.BOTTOM, 100, 100);
         // 设置setFocusable(true)，要不然点击弹窗其他地方以及返回键，弹窗都不会退出
         // 也才能让popupWindow里面的布局控件获得点击的事件，否则就被它的父亲view给拦截了
         popupWindow.setFocusable(true);
         //这个方法时设置popupWindow以外的区域可以相应触摸事件，比如我们重写了触摸事件去做一些别的操作，但首先Focusable是true。
         popupWindow.setOutsideTouchable(true);
         popupWindow.update();

     }

     // 销毁
     @Override
     public void onDismiss() {
         // TODO Auto-generated method stub
         popupWindow.dismiss();
     }

     @Override
     public void onClick(View arg0) {
         // TODO Auto-generated method stub
         switch (arg0.getId()) {
         case R.id.addCart:
             Toast.makeText(context, "添加到购物车", Toast.LENGTH_SHORT).show();
             break;
         case R.id.doCart:
             Toast.makeText(context, "立即购买", Toast.LENGTH_SHORT).show();
             break;
         case R.id.delete:
             onDismiss();
             break;
         case R.id.pop_reduce:
             if (!Popnum.getText().toString().equals("1")) {
                 String num_ReduceString = Integer.valueOf(Popnum.getText()
                         .toString()) - AddReduce + "";
                 Popnum.setText(num_ReduceString);
             } else {
                 Toast.makeText(context, "您买入的数量不能低于1", Toast.LENGTH_SHORT)
                         .show();
             }
             break;
         case R.id.pop_add:
             if (!Popnum.getText().toString().equals("1000")) {
                 String numString = Integer.valueOf(Popnum.getText().toString())
                         + AddReduce + "";
                 Popnum.setText(numString);
             }
             break;
         default:
             break;
         }
     }
 }

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="#FFFFFF"
     android:orientation="vertical"
     android:paddingLeft="15dp"
     android:paddingRight="15dp" >

     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_gravity="center_vertical"
         android:layout_marginTop="10dp" >

         <ImageView
             android:layout_width="50dp"
             android:layout_height="50dp"
             android:scaleType="fitCenter"
             android:src="@drawable/d" />

         <LinearLayout
             android:layout_width="wrap_content"
             android:layout_height="match_parent"
             android:layout_marginLeft="10dp"
             android:layout_weight="1"
             android:orientation="vertical" >

             <TextView
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:gravity="center_vertical"
                 android:text="现售价：￥49.00"
                 android:textSize="15sp" />

             <TextView
                 android:id="@+id/kucun"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:gravity="center_vertical"
                 android:paddingTop="4dp"
                 android:text="库存为：987"
                 android:textSize="12sp" />
         </LinearLayout>

         <ImageButton
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:id="@+id/delete"
             android:layout_weight="1"
             android:background="@null"
             android:padding="4dp"
             android:src="@drawable/delete" />
     </LinearLayout>

     <LinearLayout
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="#eee"
         android:orientation="horizontal" >

         <TextView
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
             android:padding="1dp"
             android:text="购买数量" />

         <TextView
             android:id="@+id/pop_reduce"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:paddingBottom="10dp"
             android:paddingLeft="12dp"
             android:paddingRight="12dp"
             android:paddingTop="10dp"
             android:text="-"
             android:color="#000000" />

         <TextView
             android:id="@+id/pop_num"
             android:layout_width="60dp"
             android:layout_height="wrap_content"
             android:gravity="center"
             android:padding="10dp"
             android:text="1"
             android:textColor="#000000" />

         <TextView
             android:id="@+id/pop_add"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:paddingBottom="10dp"
             android:paddingLeft="12dp"
             android:paddingRight="12dp"
             android:paddingTop="10dp"
             android:text="+"
             android:textColor="#000000" />
     </LinearLayout>

     <LinearLayout
         android:layout_width="wrap_content"
         android:layout_height="wrap_content" >

         <Button
             android:id="@+id/addCart"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_weight="1"
             android:background="@drawable/png_3"
             android:paddingBottom="10dp"
             android:paddingLeft="20dp"
             android:paddingRight="20dp"
             android:paddingTop="10dp"
             android:text="加入购物车"
             android:textColor="@android:color/white" />

         <Button
             android:id="@+id/doCart"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_weight="1"
             android:background="@drawable/png_3"
             android:paddingBottom="10dp"
             android:paddingLeft="20dp"
             android:paddingRight="20dp"
             android:paddingTop="10dp"
             android:text="立即购买"
             android:textColor="@android:color/white" />
     </LinearLayout>

 </LinearLayout>

另外一种常见的方式  当点击一个下拉箭头  会出现的一个popowind 如下拉选择

下拉选择

1 假如listview的item中有Button，ImageButton，CheckBox等会强制获取焦点的view，这时listview的item无法获取焦点，从而无法被点击

解决方法    在item的根布局增加以下的属性android:descendantFocusability="blocksDescendants"设置后，Button获取焦点，item中的其他控件页可以获取焦点了

如下是主要代码

 package com.ithello.xiala;

 import java.util.ArrayList;
 import java.util.List;

 import android.app.Activity;
 import android.graphics.drawable.BitmapDrawable;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.ViewGroup;
 import android.widget.AdapterView;
 import android.widget.AdapterView.OnItemClickListener;
 import android.widget.BaseAdapter;
 import android.widget.EditText;
 import android.widget.ImageView;
 import android.widget.ListView;
 import android.widget.PopupWindow;
 import android.widget.TextView;

 /**
  * 实现下拉选择的控件
  *
  * @author Administrator
  *
  */
 public class MainActivity extends Activity implements OnClickListener {
     /**文本编辑框*/
     private EditText editText;
     /**下拉的图标点击可以出现弹窗*/
     private ImageView imageView;
     /**弹窗中的list数据*/
     private List<String> list = new ArrayList<String>();
     /***/
     private ListView listView;
     /**弹窗PopupWindow*/
     private PopupWindow popupWindow;
     /**弹窗PopupWindow的默认高度*/
     private int popupWindowHight = 300;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         // TODO Auto-generated method stub
         super.onCreate(savedInstanceState);
         setContentView(R.layout.mainactivity);
         setView();
         setData();
     }

     private void setView() {
         // TODO Auto-generated method stub
         editText = (EditText) findViewById(R.id.edt_main);
         imageView = (ImageView) findViewById(R.id.iv);

         imageView.setOnClickListener(this);
     }

     private void setData() {
         // TODO Auto-generated method stub
         // 初始化数据
         for (int i = 0; i < 15; i++) {
             list.add(900000 + i + "");
         }

         listView = new ListView(this);
         listView.setVerticalScrollBarEnabled(false);// 隐藏listview的滚动条
            listView.setBackgroundColor(Color.parseColor("#E6E6E6"));
            listView.setDivider(new ColorDrawable(Color.WHITE));
            listView.setDividerHeight(1);
         MyAdapter adapter = new MyAdapter();
         listView.setAdapter(adapter);

         listView.setOnItemClickListener(new OnItemClickListener() {

             @Override
             public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                     long arg3) {
                 // TODO Auto-generated method stub
                 Log.d("jiejie", arg2 + "");
                 editText.setText(list.get(arg2));
                 popupWindow.dismiss();
             }
         });
     }

     /**
      * 显示一个PopupWindow
      */
     private void showNumPopu() {
         if (popupWindow == null) {
             popupWindow = new PopupWindow(listView, editText.getWidth(),
                     popupWindowHight);
         }
         // 要让其中的view获取焦点，必须设置为true
         popupWindow.setFocusable(true);
         // 还必须设置一个背景图片
         popupWindow.setBackgroundDrawable(new BitmapDrawable());
         // 设置点击外部点击消失
         popupWindow.setOutsideTouchable(true);
         popupWindow.showAsDropDown(editText, 0, 0);
     }

     @Override
     public void onClick(View arg0) {
         // TODO Auto-generated method stub
         switch (arg0.getId()) {
         case R.id.iv:
             showNumPopu();
             break;

         default:
             break;
         }
     }

     // list的适配器
     private class MyAdapter extends BaseAdapter {

         @Override
         public int getCount() {
             // TODO Auto-generated method stub
             return list.size();
         }

         @Override
         public Object getItem(int arg0) {
             // TODO Auto-generated method stub
             return arg0;
         }

         @Override
         public long getItemId(int arg0) {
             // TODO Auto-generated method stub
             return arg0;
         }

         @Override
         public View getView(final int position, View arg1, ViewGroup arg2) {
             // TODO Auto-generated method stub
             final View view = View.inflate(MainActivity.this,
                     R.layout.item_list, null);
             TextView tv_number = (TextView) view.findViewById(R.id.item_text);
             ImageView iv_delete = (ImageView) view
                     .findViewById(R.id.item_image);
             tv_number.setText(list.get(position));
             iv_delete.setOnClickListener(new OnClickListener() {

                 @Override
                 public void onClick(View arg0) {
                     // TODO Auto-generated method stub
                     Log.d("jiejie", "position " + position);
                     list.remove(position);
                     notifyDataSetChanged();
                     int listviewHeight = view.getHeight() * list.size();
                     popupWindow.update(
                             editText.getWidth(),
                             listviewHeight > popupWindowHight ? popupWindowHight
                                     : listviewHeight);

                     if (list.size() == 0) {
                         imageView.setVisibility(View.INVISIBLE);
                         popupWindow.dismiss();
                     }

                 }
             });
             return view;
         }

     }
 }

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#000"
    android:orientation="vertical" >

    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="30dp" >

        <EditText
            android:id="@+id/edt_main"
            android:layout_width="180dp"
            android:layout_height="40dp"
            android:hint=""
            android:background="#fff"
            android:paddingRight="20dp" />

        <ImageView
            android:id="@+id/iv"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignRight="@id/edt_main"
            android:layout_centerVertical="true"
            android:contentDescription="@null"
            android:padding="5dp"
            android:src="@drawable/spread" />
    </RelativeLayout>

</LinearLayout>