1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="fill_parent"
 4     android:layout_height="fill_parent"
 5     android:orientation="vertical" >
 6 
 7     <Button
 8         android:layout_width="fill_parent"
 9         android:layout_height="wrap_content"
10         android:onClick="click0"
11         android:text="開啟對(duì)話框activities" />
12 
13     <Button
14         android:layout_width="fill_parent"
15         android:layout_height="wrap_content"
16         android:onClick="click1"
17         android:text="顯示通知對(duì)話框" />
18 
19     <Button
20         android:layout_width="fill_parent"
21         android:layout_height="wrap_content"
22         android:onClick="click2"
23         android:text="顯示單選對(duì)話框" />
24 
25     <Button
26         android:layout_width="fill_parent"
27         android:layout_height="wrap_content"
28         android:onClick="click3"
29         android:text="顯示帶按鈕的單選對(duì)話框" />
30 
31     <Button
32         android:layout_width="fill_parent"
33         android:layout_height="wrap_content"
34         android:onClick="click4"
35         android:text="顯示帶按鈕的多選對(duì)話框" />
36     <Button
37         android:layout_width="fill_parent"
38         android:layout_height="wrap_content"
39         android:onClick="click5"
40         android:text="進(jìn)度條對(duì)話框" />
41       <Button
42         android:layout_width="fill_parent"
43         android:layout_height="wrap_content"
44         android:onClick="click6"
45         android:text="進(jìn)度條對(duì)話框顯示具體進(jìn)度" />
46 </LinearLayout>

  1 package cn.itcast.dialog;
  2 
  3 import android.app.Activity;
  4 import android.app.AlertDialog;
  5 import android.app.AlertDialog.Builder;
  6 import android.app.ProgressDialog;
  7 import android.content.DialogInterface;
  8 import android.content.DialogInterface.OnClickListener;
  9 import android.content.DialogInterface.OnMultiChoiceClickListener;
 10 import android.content.Intent;
 11 import android.net.Uri;
 12 import android.os.Bundle;
 13 import android.view.View;
 14 import android.widget.Toast;
 15 
 16 public class DemoActivity extends Activity {
 17     @Override
 18     public void onCreate(Bundle savedInstanceState) {
 19         super.onCreate(savedInstanceState);
 20         setContentView(R.layout.main);
 21     }
 22 
 23     // 當(dāng)當(dāng)前的activity失去焦點(diǎn)的時(shí)候調(diào)用的方法.
 24     @Override
 25     protected void onPause() {
 26         // 對(duì)話框 是activity的一部分,彈出對(duì)話框 不會(huì)讓activity失去焦點(diǎn).
 27         System.out.println("失去焦點(diǎn)");
 28         super.onPause();
 29     }
 30 
 31     public void click0(View view) {
 32         Intent intent = new Intent(this, DialogActivity.class);
 33         startActivity(intent);
 34     }
 35 
 36     public void click1(View view) {// 顯示一個(gè)通知對(duì)話框
 37         // 創(chuàng)建一個(gè)對(duì)話框的構(gòu)建者
 38         AlertDialog.Builder builder = new Builder(this);
 39         builder.setIcon(R.drawable.ic_launcher);
 40         builder.setTitle("我是對(duì)話框標(biāo)題");
 41         builder.setMessage("打開黑馬網(wǎng)站");
 42         builder.setPositiveButton("確定", new OnClickListener() {
 43 
 44             public void onClick(DialogInterface dialog, int which) {
 45                 Intent intent = new Intent();
 46                 intent.setAction(Intent.ACTION_VIEW);
 47                 intent.addCategory(Intent.CATEGORY_BROWSABLE);
 48                 intent.setData(Uri.parse("http://edu.csdn.net"));
 49                 startActivity(intent);
 50 
 51             }
 52         });
 53         builder.setNegativeButton("取消", new OnClickListener() {
 54 
 55             public void onClick(DialogInterface dialog, int which) {
 56                 // 用戶點(diǎn)擊取消 會(huì)關(guān)閉掉對(duì)話框
 57             }
 58         });
 59         AlertDialog dialog = builder.create();
 60         dialog.show();
 61     }
 62 
 63     public void click2(View view) {// 顯示單選對(duì)話框
 64         // 創(chuàng)建一個(gè)對(duì)話框的構(gòu)建者
 65         AlertDialog.Builder builder = new Builder(this);
 66         builder.setIcon(R.drawable.ic_launcher);
 67         builder.setTitle("單選對(duì)話框");
 68         final String[] items = { "java", ".net", "php" };
 69         builder.setItems(items, new OnClickListener() {
 70 
 71             public void onClick(DialogInterface dialog, int which) {
 72                 Toast.makeText(getApplicationContext(), "選擇了" + items[which], 0)
 73                         .show();
 74             }
 75         });
 76 
 77         AlertDialog dialog = builder.create();
 78         dialog.show();
 79     }
 80 
 81     public void click3(View view) {// 顯示帶按鈕單選對(duì)話框
 82         // 創(chuàng)建一個(gè)對(duì)話框的構(gòu)建者
 83         AlertDialog.Builder builder = new Builder(this);
 84         builder.setIcon(R.drawable.ic_launcher);
 85         builder.setTitle("單選對(duì)話框");
 86         final String[] items = { "java", ".net", "php" };
 87         builder.setSingleChoiceItems(items, 2, new OnClickListener() {
 88 
 89             public void onClick(DialogInterface dialog, int which) {
 90                 Toast.makeText(getApplicationContext(), "選擇了" + items[which], 0)
 91                         .show();
 92                 dialog.dismiss();
 93             }
 94         });
 95 
 96         AlertDialog dialog = builder.create();
 97         dialog.show();
 98     }
 99 
100     public void click4(View view) {// 顯示帶按鈕多選對(duì)話框
101         // 創(chuàng)建一個(gè)對(duì)話框的構(gòu)建者
102         AlertDialog.Builder builder = new Builder(this);
103         builder.setIcon(R.drawable.ic_launcher);
104         builder.setTitle("多選對(duì)話框");
105         final String[] items = { "java", ".net", "php" };
106 
107         builder.setMultiChoiceItems(items,
108                 new boolean[] { false, true, false },
109                 new OnMultiChoiceClickListener() {
110 
111                     public void onClick(DialogInterface dialog, int which,
112                             boolean isChecked) {
113                         if (isChecked) {
114                             Toast.makeText(getApplicationContext(),
115                                     "選擇了" + items[which], 0).show();
116                         } else {
117                             Toast.makeText(getApplicationContext(),
118                                     "取消選擇了" + items[which], 0).show();
119                         }
120 
121                     }
122                 });
123         builder.setNegativeButton("取消", new OnClickListener() {
124 
125             public void onClick(DialogInterface dialog, int which) {
126 
127             }
128         });
129         AlertDialog dialog = builder.create();
130         dialog.show();
131     }
132 
133     public void click5(View view) {// 進(jìn)度條對(duì)話框
134         ProgressDialog pd = new ProgressDialog(this);
135         // 默認(rèn)是一個(gè)不顯示具體進(jìn)度的對(duì)話框
136         pd.setMessage("正在下載數(shù)據(jù)....");
137         pd.show();
138     }
139 
140     public void click6(View view) {// 進(jìn)度條對(duì)話框
141         final ProgressDialog pd = new ProgressDialog(this);
142         // 顯示具體進(jìn)度的對(duì)話框
143         pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
144         pd.setMax(100);
145         pd.setProgress(20);
146         pd.show();
147         new Thread() {
148             public void run() {
149                 for (int i = 0; i < 100; i++) {
150                     pd.setProgress(i);
151                     try {
152                         Thread.sleep(100);
153                     } catch (InterruptedException e) {
154                         // TODO Auto-generated catch block
155                         e.printStackTrace();
156                     }
157                 }
158             };
159         }.start();
160     }
161 }