Android使用AlertDialog创建对话框

package com.example.test; 
 
import android.app.Activity; 
import android.app.AlertDialog; 
import android.app.AlertDialog.Builder; 
import android.content.DialogInterface; 
import android.content.DialogInterface.OnMultiChoiceClickListener; 
import android.os.Bundle; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.Toast; 
 
public class MainActivity extends Activity { 
 private boolean[] checkedItems;//记录各个列表项的状态 
 private String[] items;//各列表项要显示的内容 
 @Override 
 public void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.main); 
   
  //显示带取消、中立和确定按钮的对话框 
  Button button1=(Button)findViewById(R.id.button1); 
  button1.setOnClickListener(new OnClickListener() { 
    
   @Override 
   public void onClick(View arg0) { 
    AlertDialog alert=new AlertDialog.Builder(MainActivity.this).create(); 
    alert.setIcon(R.drawable.ic_launcher);//设置对话框的图标 
    alert.setTitle("系统提示");//设置对话框的标题 
    alert.setMessage("显示带取消、中立和确定按钮的对话框！");//设置对话框显示的内容 
    //添加“取消”按钮 
    alert.setButton(DialogInterface.BUTTON_NEGATIVE, "取消", 
      new DialogInterface.OnClickListener() { 
 
 
      @Override 
      public void onClick(DialogInterface dialog,int which) { 
       Toast.makeText(MainActivity.this, "您单击了取消按钮", Toast.LENGTH_SHORT).show(); 
      } 
    }); 
    //添加“确定”按钮 
    alert.setButton(DialogInterface.BUTTON_POSITIVE, "确定", 
      new DialogInterface.OnClickListener() { 
 
 
      @Override 
      public void onClick(DialogInterface dialog,int which) { 
       Toast.makeText(MainActivity.this, "您单击了确定按钮", Toast.LENGTH_SHORT).show(); 
      } 
    }); 
    //添加“中立”按钮 
    alert.setButton(DialogInterface.BUTTON_NEUTRAL, "中立", 
      new DialogInterface.OnClickListener() { 
 
 
      @Override 
      public void onClick(DialogInterface dialog,int which) { 
       Toast.makeText(MainActivity.this, "您单击了中立按钮", Toast.LENGTH_SHORT).show(); 
      } 
    }); 
    alert.show();//显示对话框 
   } 
  }); 
   
   
  //显示列表的对话框 
  Button button2=(Button)findViewById(R.id.button2); 
  button2.setOnClickListener(new OnClickListener() { 
    
   @Override 
   public void onClick(View arg0) { 
    final String[] items=new String[]{"唱歌","跳舞","美术","远足旅行","摄影"}; 
    Builder builder=new AlertDialog.Builder(MainActivity.this); 
    builder.setIcon(R.drawable.in); 
    builder.setTitle("请选择你的爱好："); 
    //添加列表项 
    builder.setItems(items, new DialogInterface.OnClickListener() { 
 
 
     @Override 
     public void onClick(DialogInterface dialog, int which) { 
      Toast.makeText(MainActivity.this, "您选择了"+items[which],Toast.LENGTH_SHORT).show(); 
     } 
    }); 
    builder.create().show();//创建对话框并显示 
   } 
  }); 
   
  //显示带单选列表对话框 
  Button button3=(Button)findViewById(R.id.button3); 
  button3.setOnClickListener(new OnClickListener() { 
    
   @Override 
   public void onClick(View arg0) { 
    final String[] items=new String[]{"标准","无声","会议","户外","离线"}; 
    Builder builder=new AlertDialog.Builder(MainActivity.this); 
    builder.setIcon(R.drawable.music); 
    builder.setTitle("请选择要使用的情景模式:"); 
    builder.setSingleChoiceItems(items, 0, new DialogInterface.OnClickListener(){ 
 
 
     @Override 
     public void onClick(DialogInterface dialog, int which) { 
      Toast.makeText(MainActivity.this, "您选择了"+items[which],Toast.LENGTH_SHORT).show(); 
     } 
      
    }); 
    builder.setPositiveButton("确定", null); 
    builder.create().show();//创建对话框并显示 
   } 
  }); 
   
  //显示带多选列表对话框 
  Button button4=(Button)findViewById(R.id.button4); 
  button4.setOnClickListener(new OnClickListener() { 
    
   @Override 
   public void onClick(View arg0) { 
    checkedItems =new boolean[]{false,true,false,true,false};//记录各列表的状态 
    //各列表项要显示的内容 
    items=new String[]{"植物大战僵尸","愤怒的小鸟","泡泡龙","开心消消乐","地铁跑酷"}; 
    //显示带单选列表框的对话框 
    Builder builder=new AlertDialog.Builder(MainActivity.this); 
    builder.setIcon(R.drawable.setting); 
    builder.setTitle("请选择您喜欢的游戏:"); 
    builder.setMultiChoiceItems(items, checkedItems, new OnMultiChoiceClickListener() { 
      
     @Override 
     public void onClick(DialogInterface dialog, int which, boolean isChecked) { 
      checkedItems[which]=isChecked; 
     } 
    }); 
    //为对话框添加"确定"按钮 
    builder.setPositiveButton("确定", new DialogInterface.OnClickListener() { 
      
     @Override 
     public void onClick(DialogInterface dialog, int which) { 
      String result=""; 
      for (int i = 0; i