学步园

在main.xml中

<?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="fill_parent"

    android:orientation="vertical" >

      <Button

        android:id="@+id/mybut"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="查找网络"/>

</LinearLayout>

在MyDialogDemo.java程序中

package com.tarena.dialog;

import android.app.Activity;

import android.app.AlertDialog;

import android.app.DatePickerDialog;

import android.app.Dialog;

import android.app.ProgressDialog;

import android.app.TimePickerDialog;

import android.content.DialogInterface;

import android.os.Bundle;

import android.view.KeyEvent;

import android.view.LayoutInflater;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.DatePicker;

import android.widget.ImageButton;

import android.widget.TextView;

import android.widget.TimePicker;

public class MyDialogDemo extends Activity {

  private Button mybut = null ; // 定义按钮

  @Override

  public void onCreate(Bundle savedInstanceState) {

     super.onCreate(savedInstanceState);

     super.setContentView(R.layout.main); // 调用布局管理器

     this.mybut = (Button) super.findViewById(R.id.mybut) ;  // 取得按钮

    this.mybut.setOnClickListener(new OnClickListenerImpl()) ;  // 设置事件类

  }

  private class OnClickListenerImpl implements OnClickListener {

     public void onClick(View view) {

       final ProgressDialog proDia = new ProgressDialog

            (MyDialogDemo.this);

       proDia.setTitle("搜索网络");

       proDia.setMessage("请耐心等待……");

       proDia.onStart();  //启动进度

       new Thread(){

         public void run(){ //线程的主体类

            try {

              Thread.sleep(10000); //运行3秒

            } catch (Exception e) {

              e.printStackTrace();

            }finally {

              proDia.dismiss();  //关闭对话框

            }

         }

       }.start();  //启动线程

       proDia.show();

     }

  }

}