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Android入门第十篇之PopupWindow

AndroidXMLOS.netBlog 
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http://blog.csdn.net/hellogv/archive/2010/10/21/5956358.aspx

本文来自http://blog.csdn.net/hellogv/ ，引用必须注明出处！    

       介绍过AlertDialog之后，接下来就介绍一下PopupWindow这种对话框。PopupWindow是阻塞对话框，只有在外部线程 或者 PopupWindow本身做退出操作才行。PopupWindow完全依赖Layout做外观，在常见的开发中，PopupWindow应该会与 AlertDialog常混用。

       贴出本例中运行的结果图：

main.xml的源码如下：

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  1. <? xml   version = "1.0"   encoding = "utf-8" ?>   
  2. < LinearLayout   xmlns:android = "http://schemas.android.com/apk/res/android"   
  3.     android:orientation = "vertical"   
  4.     android:layout_width = "fill_parent"   
  5.     android:layout_height = "fill_parent"   
  6.     >   
  7. < Button   android:id = "@+id/Button01"   android:layout_height = "wrap_content"   android:layout_width = "fill_parent"   android:text = "PopupWindow演示" > </ Button >   
  8. </ LinearLayout >   

 

下图是PopupWindow弹出的截图，这里的PopupWindow是个登录框，点“确定”则自动填写，点“取消”则关闭PopupWindow。

 

popupwindow.xml的源码：

 

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  1. <? xml   version = "1.0"   encoding = "utf-8" ?>   
  2.   
  3. < LinearLayout   xmlns:android = "http://schemas.android.com/apk/res/android"   
  4.     android:layout_width = "fill_parent"   android:layout_height = "wrap_content"   
  5.     android:orientation = "vertical"   android:background = "#000000" >   
  6.   
  7.     < TextView   android:id = "@+id/username_view"   
  8.         android:layout_height = "wrap_content"   
  9.         android:layout_marginLeft = "20dip"   
  10.         android:layout_marginRight = "20dip"   android:text = "用户名"   
  11.         android:textAppearance = "?android:attr/textAppearanceMedium"   android:layout_width = "fill_parent" />   
  12.   
  13.     < EditText   android:id = "@+id/username_edit"   
  14.         android:layout_height = "wrap_content"   
  15.         android:layout_width = "fill_parent"   android:layout_marginLeft = "20dip"   
  16.         android:layout_marginRight = "20dip"   android:capitalize = "none"   
  17.         android:textAppearance = "?android:attr/textAppearanceMedium"   />   
  18.   
  19.     < TextView   android:id = "@+id/password_view"   
  20.         android:layout_height = "wrap_content"   
  21.         android:layout_marginLeft = "20dip"   
  22.         android:layout_marginRight = "20dip"   android:text = "密码"   
  23.         android:textAppearance = "?android:attr/textAppearanceMedium"   android:layout_width = "fill_parent" />   
  24.   
  25.     < EditText   android:id = "@+id/password_edit"   
  26.         android:layout_height = "wrap_content"   
  27.         android:layout_width = "fill_parent"   android:layout_marginLeft = "20dip"   
  28.         android:layout_marginRight = "20dip"   android:capitalize = "none"   
  29.         android:password = "true"   
  30.         android:textAppearance = "?android:attr/textAppearanceMedium"   />   
  31.   
  32. < LinearLayout   android:id = "@+id/LinearLayout01"   android:layout_height = "wrap_content"   android:layout_width = "fill_parent"   android:gravity = "center" > < Button   android:layout_width = "wrap_content"   android:layout_height = "wrap_content"   android:id = "@+id/BtnOK"   android:layout_weight = "100"   android:text = "确定" > </ Button > < Button   android:layout_width = "wrap_content"   android:layout_height = "wrap_content"   android:layout_weight = "100"   android:text = "取消"   android:id = "@+id/BtnCancel" > </ Button > </ LinearLayout >   
  33. </ LinearLayout >   

接下来是程序源码：

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  1. package  com.testAlertDialog;  
  2.   
  3. import  android.app.Activity;  
  4. import  android.app.AlertDialog;  
  5. import  android.content.Context;  
  6. import  android.content.DialogInterface;  
  7. import  android.os.Bundle;  
  8. import  android.text.Editable;  
  9. import  android.view.Gravity;  
  10. import  android.view.LayoutInflater;  
  11. import  android.view.View;  
  12. import  android.view.View.OnClickListener;  
  13. import  android.widget.Button;  
  14. import  android.widget.EditText;  
  15. import  android.widget.PopupWindow;  
  16.   
  17.   
  18. public   class  testAlertDialog  extends  Activity {  
  19.     Button btnPopupWindow;  
  20.     /** Called when the activity is first created. */   
  21.     @Override   
  22.     public   void  onCreate(Bundle savedInstanceState) {  
  23.         super .onCreate(savedInstanceState);  
  24.         setContentView(R.layout.main);  
  25.         //定义按钮   
  26.         btnPopupWindow=(Button)this .findViewById(R.id.Button01);  
  27.         btnPopupWindow.setOnClickListener(new  ClickEvent());  
  28.     }  
  29.       
  30.       
  31.     //统一处理按键事件   
  32.     class  ClickEvent  implements  OnClickListener{  
  33.   
  34.         @Override   
  35.         public   void  onClick(View v) {  
  36.             // TODO Auto-generated method stub   
  37.             if (v==btnPopupWindow)  
  38.             {  
  39.                 showPopupWindow(testAlertDialog.this ,  
  40.                         testAlertDialog.this .findViewById(R.id.Button01));  
  41.             }  
  42.         }  
  43.     }  
  44.   
  45.     public   void  showPopupWindow(Context context,View parent){  
  46.         LayoutInflater inflater = (LayoutInflater)     
  47.            context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);     
  48.         final  View vPopupWindow=inflater.inflate(R.layout.popupwindow,  null ,  false );  
  49.         final  PopupWindow pw=  new  PopupWindow(vPopupWindow, 300 , 300 , true );  
  50.   
  51.         //OK按钮及其处理事件   
  52.         Button btnOK=(Button)vPopupWindow.findViewById(R.id.BtnOK);  
  53.         btnOK.setOnClickListener(new  OnClickListener(){  
  54.             @Override   
  55.             public   void  onClick(View v) {  
  56.                 //设置文本框内容   
  57.                 EditText edtUsername=(EditText)vPopupWindow.findViewById(R.id.username_edit);  
  58.                 edtUsername.setText("username" );  
  59.                 EditText edtPassword=(EditText)vPopupWindow.findViewById(R.id.password_edit);  
  60.                 edtPassword.setText("password" );  
  61.             }  
  62.         });  
  63.           
  64.       //Cancel按钮及其处理事件   
  65.         Button btnCancel=(Button)vPopupWindow.findViewById(R.id.BtnCancel);  
  66.         btnCancel.setOnClickListener(new  OnClickListener(){  
  67.             @Override   
  68.             public   void  onClick(View v) {  
  69.                 pw.dismiss();//关闭   
  70.             }  
  71.         });  
  72.         //显示popupWindow对话框   
  73.         pw.showAtLocation(parent, Gravity.CENTER, 0 ,  0 );  
  74.     }  
  75.       
  76. } 
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