今天我们学习的内容是实现两种对话框(Dialog)，第一种是询问是否退出对话框，另外一种是带图标的列表对话框，程序的执行效果是，我们点击button1的时候，弹出第一种对话框，我们点击button2的时候，弹出另外一种对话框。

(1)  首先是布局方面，有三个xml文件，一个是Activity的布局文件，一个是Dialog的布局文件，一个是ListView的布局文件，内容分别例如以下：

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="fill_parent"android:layout_height="fill_parent" android:orientation="vertical"><Button android:id="@+id/exit_button"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center"android:text="对话框1"/><Button android:id="@+id/list_button"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center"android:text="对话框2"/></LinearLayout>

dialog_list.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical" ><ListViewandroid:id="@+id/listview"android:layout_width="fill_parent"android:layout_height="fill_parent"android:cacheColorHint="#00000000" ></ListView></LinearLayout>

items.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="horizontal" ><ImageViewandroid:id="@+id/image"android:layout_width="wrap_content"android:layout_height="wrap_content"android:adjustViewBounds="true"android:maxHeight="72px"android:maxWidth="72px"android:paddingBottom="20px"android:paddingLeft="10px"android:paddingTop="20px" /><TextViewandroid:id="@+id/title"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center"android:padding="10px" /></LinearLayout>

(2)然后就Java代码部分，代码部分关于dialog我已经具体凝视，具体请看：

package com.example.dialogdemo;import java.util.ArrayList;
import java.util.HashMap;import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;public class MainActivity extends Activity {//定义两个静态字符串private static final String DIALOG_ICON = "icon";private static final String DIALOG_TITLE = "title";//声明Button类型的变量button1private Button button1;//声明Button类型的变量button2private Button button2;//声明View类型的变量viewprivate View view;//声明ListView类型的变量listViewprivate ListView listView;//声明一个ArrayList变量mList，它里面的item都是HashMap类型private ArrayList<HashMap<String, Object>> mList;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initData();setupViews();}/*** 初始化数据*/private void initData(){//初始化mListif(mList == null){mList = new ArrayList<HashMap<String,Object>>();}else{mList.clear();}//向mList里面加入数据HashMap<String, Object> map  = new HashMap<String, Object>();map.put(DIALOG_ICON, R.drawable.img01);map.put(DIALOG_TITLE, "程序管理");mList.add(map);map = new HashMap<String, Object>();map.put(DIALOG_ICON, R.drawable.img02);map.put(DIALOG_TITLE, "保密设置");mList.add(map);map = new HashMap<String, Object>();map.put(DIALOG_ICON, R.drawable.img03);map.put(DIALOG_TITLE, "安全设置");mList.add(map);map = new HashMap<String, Object>();map.put(DIALOG_ICON, R.drawable.img04);map.put(DIALOG_TITLE, "邮件设置");mList.add(map);map = new HashMap<String, Object>();map.put(DIALOG_ICON, R.drawable.img05);map.put(DIALOG_TITLE, "铃声设置");mList.add(map);}/*** 初始化视图*/private void setupViews(){LayoutInflater inflater = LayoutInflater.from(MainActivity.this);view = inflater.inflate(R.layout.dialog_list, null);listView = (ListView) view.findViewById(R.id.listview);DialogListViewAdapter adapter = new DialogListViewAdapter();listView.setAdapter(adapter);//通过findviewbyid()获取Button对象button1 = (Button) findViewById(R.id.exit_button);button2 = (Button) findViewById(R.id.list_button);//为button1设置点击监听器button1.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {//初始化一个AlertDialog对象AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this).create();//为dialog设置图标alertDialog.setIcon(getResources().getDrawable(R.drawable.advise));//为dialog设置标题alertDialog.setTitle("退出？");//为dialog设置主体内容alertDialog.setMessage("是否真的要退出当前应用？");//为dialog设置一个按钮alertDialog.setButton(DialogInterface.BUTTON_NEGATIVE, "不退出", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stub}});//为dialog设置还有一个按钮alertDialog.setButton(DialogInterface.BUTTON_POSITIVE, "是的", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stubMainActivity.this.finish();}});//显示dialogalertDialog.show();}});//为button2设置点击监听器button2.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {//初始化一个AlertDialogAlertDialog alertDialog = new  AlertDialog.Builder(MainActivity.this).create();//为alertDialog设置视图alertDialog.setView(view);//显示alertDialogalertDialog.show();}});}/***  定义ListView的Adapter，其作用是为ListView视图提供数据*/class DialogListViewAdapter extends BaseAdapter{@Overridepublic int getCount() {return mList.size();}@Overridepublic Object getItem(int position) {return mList.get(position);}@Overridepublic long getItemId(int position) {return position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {ListViewItemHolder holder;if(convertView == null){convertView = LayoutInflater.from(MainActivity.this).inflate(R.layout.items, null);holder = new ListViewItemHolder();holder.imageView = (ImageView) convertView.findViewById(R.id.image);holder.textView = (TextView) convertView.findViewById(R.id.title);convertView.setTag(holder);}else{holder = (ListViewItemHolder) convertView.getTag();}HashMap<String, Object> map = mList.get(position);int iconId = (Integer) map.get(DIALOG_ICON);String title = (String) map.get(DIALOG_TITLE);holder.imageView.setImageResource(iconId);holder.textView.setText(title);return convertView;}}//两个视图控件的一个封装类class ListViewItemHolder{ImageView imageView;TextView textView;}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {getMenuInflater().inflate(R.menu.activity_main, menu);return true;}
}

(3)执行一下android project，效果图例如以下：

最后附上源代码下载地址：

Android对话框(dialog)实例