<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:orientation="vertical"  android:layout_width="fill_parent"  android:layout_height="fill_parent"  android:id="@+id/layout1"  android:gravity="center_horizontal"  >  <Button android:id="@+id/button1"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:text="顯示帶取消、中立和確定按鈕的對話框"/>  <Button android:id="@+id/button2"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:text="顯示列表的對話框"/>  <Button android:id="@+id/button3"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:text="顯示帶單選列表對話框"/>  <Button android:id="@+id/button4"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:text="顯示帶多選列表對話框"/> </LinearLayout> 

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;//記錄各個列表項的狀態(tài)  private String[] items;//各列表項要顯示的內容  @Override  public void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   setContentView(R.layout.main);      //顯示帶取消、中立和確定按鈕的對話框   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);//設置對話框的圖標     alert.setTitle("系統(tǒng)提示");//設置對話框的標題     alert.setMessage("顯示帶取消、中立和確定按鈕的對話框！");//設置對話框顯示的內容     //添加“取消”按鈕     alert.setButton(DialogInterface.BUTTON_NEGATIVE, "取消",       new DialogInterface.OnClickListener() {         @Override       public void onClick(DialogInterface dialog,int which) {        Toast.makeText(MainActivity.this, "您單擊了取消按鈕", Toast.LENGTH_SHORT).show();       }     });     //添加“確定”按鈕     alert.setButton(DialogInterface.BUTTON_POSITIVE, "確定",       new DialogInterface.OnClickListener() {         @Override       public void onClick(DialogInterface dialog,int which) {        Toast.makeText(MainActivity.this, "您單擊了確定按鈕", Toast.LENGTH_SHORT).show();       }     });     //添加“中立”按鈕     alert.setButton(DialogInterface.BUTTON_NEUTRAL, "中立",       new DialogInterface.OnClickListener() {         @Override       public void onClick(DialogInterface dialog,int which) {        Toast.makeText(MainActivity.this, "您單擊了中立按鈕", Toast.LENGTH_SHORT).show();       }     });     alert.show();//顯示對話框    }   });         //顯示列表的對話框   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","美術","遠足旅行","攝影"};     Builder builder=new AlertDialog.Builder(MainActivity.this);     builder.setIcon(R.drawable.in);     builder.setTitle("請選擇你的愛好：");     //添加列表項     builder.setItems(items, new DialogInterface.OnClickListener() {        @Override      public void onClick(DialogInterface dialog, int which) {       Toast.makeText(MainActivity.this, "您選擇了"+items[which],Toast.LENGTH_SHORT).show();      }     });     builder.create().show();//創(chuàng)建對話框并顯示    }   });      //顯示帶單選列表對話框   Button button3=(Button)findViewById(R.id.button3);   button3.setOnClickListener(new OnClickListener() {        @Override    public void onClick(View arg0) {     final String[] items=new String[]{"標準","無聲","會議","戶外","離線"};     Builder builder=new AlertDialog.Builder(MainActivity.this);     builder.setIcon(R.drawable.music);     builder.setTitle("請選擇要使用的情景模式:");     builder.setSingleChoiceItems(items, 0, new DialogInterface.OnClickListener(){        @Override      public void onClick(DialogInterface dialog, int which) {       Toast.makeText(MainActivity.this, "您選擇了"+items[which],Toast.LENGTH_SHORT).show();      }           });     builder.setPositiveButton("確定", null);     builder.create().show();//創(chuàng)建對話框并顯示    }   });      //顯示帶多選列表對話框   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};//記錄各列表的狀態(tài)     //各列表項要顯示的內容     items=new String[]{"植物大戰(zhàn)僵尸","憤怒的小鳥","泡泡龍","開心消消樂","地鐵跑酷"};     //顯示帶單選列表框的對話框     Builder builder=new AlertDialog.Builder(MainActivity.this);     builder.setIcon(R.drawable.setting);     builder.setTitle("請選擇您喜歡的游戲:");     builder.setMultiChoiceItems(items, checkedItems, new OnMultiChoiceClickListener() {            @Override      public void onClick(DialogInterface dialog, int which, boolean isChecked) {       checkedItems[which]=isChecked;      }     });     //為對話框添加"確定"按鈕     builder.setPositiveButton("確定", new DialogInterface.OnClickListener() {            @Override      public void onClick(DialogInterface dialog, int which) {       String result="";       for (int i = 0; i <checkedItems.length; i++) {        if(checkedItems[i]){         result+=items[i]+"、";        }       }       //當result不為空時，通過消息提示框顯示選擇的結果       if(!"".equals(result)){        result=result.substring(0,result.length()-1);//去掉最后的"、"號        Toast.makeText(MainActivity.this, "您選擇了:["+result+"]",Toast.LENGTH_SHORT).show();       }      }     });     builder.create().show();//創(chuàng)建對話框并顯示    }   });  } }