Android PopupWindow弹出对话框的实现

package com.easyway.ui.popupWindow;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.PopupWindow;

/**
 * PopupWindow弹出对话框的实现
 * 
 *      		//获取布局管理对象
 *        		LayoutInflater inflater = (LayoutInflater)   
 *         	       context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);   
 *         	    //获取相关的自定义布局视图
 *         		final View vPopupWindow=inflater.inflate(R.layout.popupwindow, null, false);
 *         		//PopupWindow的对话框的弹出
 *        	    final PopupWindow pw= new PopupWindow(vPopupWindow,300,300,true);
 *        
 *        
 *        
 *                //显示popupWindow对话框
        	    pw.showAtLocation(parent, Gravity.CENTER, 0, 0);
 * @author longgangbai
 *
 */
public class AndroidPopupWindowActivity extends Activity {
	
        	Button btnPopupWindow;
            /** Called when the activity is first created. */
            @Override
            public void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.main);
                //定义按钮
                btnPopupWindow=(Button)this.findViewById(R.id.Button01);
                btnPopupWindow.setOnClickListener(new ClickEvent());
            }
            
            
            //统一处理按键事件
            class ClickEvent implements OnClickListener{

            	@Override
            	public void onClick(View v) {
            		// TODO Auto-generated method stub
            		if(v==btnPopupWindow)
            		{
            			showPopupWindow(AndroidPopupWindowActivity.this,
            					AndroidPopupWindowActivity.this.findViewById(R.id.Button01));
            		}
            	}
            }

            /**
             * 显示相关的PopupWindow对话框
             * @param context
             * @param parent
             */
        	public void showPopupWindow(Context context,View parent){
        		//获取布局管理对象
        		LayoutInflater inflater = (LayoutInflater)   
        	       context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);   
        	    //获取相关的自定义布局视图
        		final View vPopupWindow=inflater.inflate(R.layout.popupwindow, null, false);
        		//PopupWindow的对话框的弹出
        	    final PopupWindow pw= new PopupWindow(vPopupWindow,300,300,true);

        	    //OK按钮及其处理事件
                Button btnOK=(Button)vPopupWindow.findViewById(R.id.BtnOK);
                btnOK.setOnClickListener(new OnClickListener(){
        			@Override
        			public void onClick(View v) {
        				//设置文本框内容
        			    EditText edtUsername=(EditText)vPopupWindow.findViewById(R.id.username_edit);
        			    edtUsername.setText("username");
        			    EditText edtPassword=(EditText)vPopupWindow.findViewById(R.id.password_edit);
        			    edtPassword.setText("password");
        			}
                });
                
              //Cancel按钮及其处理事件
                Button btnCancel=(Button)vPopupWindow.findViewById(R.id.BtnCancel);
                btnCancel.setOnClickListener(new OnClickListener(){
        			@Override
        			public void onClick(View v) {
        				pw.dismiss();//关闭
        			}
                });
                //显示popupWindow对话框
        	    pw.showAtLocation(parent, Gravity.CENTER, 0, 0);
        	}
        	
        }