对话框AlertDialog的基本类型与创建

测试代码：

布局：

activity_main.xml：

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     xmlns:tools="http://schemas.android.com/tools"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:orientation="vertical"
 6     tools:context="com.zzw.testalerdialog.MainActivity" >
 7 
 8     <Button
 9         android:id="@+id/horizontally"
10         android:layout_width="match_parent"
11         android:layout_height="wrap_content"
12         android:layout_gravity="center_horizontal"
13         android:text="横向显示" />
14 
15     <Button
16         android:id="@+id/vertical"
17         android:layout_width="match_parent"
18         android:layout_height="wrap_content"
19         android:layout_gravity="center_horizontal"
20         android:paddingTop="20dp"
21         android:text="竖向显示" />
22 
23     <Button
24         android:id="@+id/singleChoice"
25         android:layout_width="match_parent"
26         android:layout_height="wrap_content"
27         android:layout_gravity="center_horizontal"
28         android:paddingTop="20dp"
29         android:text="单选框显示" />
30 
31     <Button
32         android:id="@+id/multiChoice"
33         android:layout_width="match_parent"
34         android:layout_height="wrap_content"
35         android:layout_gravity="center_horizontal"
36         android:paddingTop="20dp"
37         android:text="多选框显示" />
38 
39     <Button
40         android:id="@+id/myDialog"
41         android:layout_width="match_parent"
42         android:layout_height="wrap_content"
43         android:layout_gravity="center_horizontal"
44         android:paddingTop="20dp"
45         android:text="自定义显示" />
46 
47     <ImageView
48         android:layout_width="match_parent"
49         android:layout_height="wrap_content"
50         android:layout_gravity="center_horizontal"
51         android:layout_weight="1"
52         android:src="@drawable/ic_launcher" />
53 
54 </LinearLayout>

JAVA代码：

  1 package com.zzw.testalerdialog;
  2 
  3 import android.app.Activity;
  4 import android.app.AlertDialog;
  5 import android.content.Context;
  6 import android.content.DialogInterface;
  7 import android.os.Bundle;
  8 import android.view.View;
  9 import android.widget.Toast;
 10 
 11 public class MainActivity extends Activity implements View.OnClickListener {
 12 
 13     private Context context;
 14 
 15     @Override
 16     protected void onCreate(Bundle savedInstanceState) {
 17         super.onCreate(savedInstanceState);
 18         setContentView(R.layout.activity_main);
 19 
 20         init();
 21     }
 22 
 23     private void init() {
 24 
 25         context = this;
 26 
 27         findViewById(R.id.horizontally).setOnClickListener(this);
 28         findViewById(R.id.vertical).setOnClickListener(this);
 29         findViewById(R.id.singleChoice).setOnClickListener(this);
 30         findViewById(R.id.multiChoice).setOnClickListener(this);
 31         findViewById(R.id.myDialog).setOnClickListener(this);
 32         
 33     }
 34 
 35     // 横向类型显示
 36     private void horizontallyShow() {
 37 
 38         AlertDialog dialog = new AlertDialog.Builder(context).create();
 39         dialog.setIcon(R.drawable.ic_launcher);
 40         dialog.setTitle("横向显示");
 41         dialog.setMessage("提示信息");
 42         // DialogInterface.BUTTON_POSITIVE作用是显示的顺序
 43         dialog.setButton(DialogInterface.BUTTON_POSITIVE, "确定", new DialogInterface.OnClickListener() {
 44 
 45             @Override
 46             public void onClick(DialogInterface dialog, int which) {
 47                 Toast.makeText(context, "确定", 0).show();
 48             }
 49         });
 50 
 51         dialog.setButton(DialogInterface.BUTTON_NEGATIVE, "取消", new DialogInterface.OnClickListener() {
 52 
 53             @Override
 54             public void onClick(DialogInterface dialog, int which) {
 55                 Toast.makeText(context, "取消", 0).show();
 56             }
 57         });
 58 
 59         dialog.setButton(DialogInterface.BUTTON_NEUTRAL, "考虑", new DialogInterface.OnClickListener() {
 60 
 61             @Override
 62             public void onClick(DialogInterface dialog, int which) {
 63                 Toast.makeText(context, "考虑", 0).show();
 64             }
 65         });
 66 
 67         dialog.show();
 68     }
 69 
 70     // 竖向类型显示
 71     private void verticalShow() {
 72 
 73         final String[] items = new String[3];
 74         for (int i = 0; i < 3; i++) {
 75             items[i] = "选项--" + i;
 76         }
 77 
 78         AlertDialog dialog = new AlertDialog.Builder(context).setItems(items, new DialogInterface.OnClickListener() {
 79 
 80             @Override
 81             public void onClick(DialogInterface dialog, int which) {
 82 
 83                 Toast.makeText(context, items[which], Toast.LENGTH_SHORT).show();
 84             }
 85         }).create();
 86 
 87         dialog.setTitle("竖向显示");
 88         dialog.setIcon(R.drawable.ic_launcher);
 89 
 90         dialog.show();
 91 
 92     }
 93 
 94     // 单选框类型显示
 95     private void singleChoiceShow() {
 96 
 97         final String[] items = new String[3];
 98         for (int i = 0; i < 3; i++) {
 99             items[i] = "选项--" + i;
100         }
101 
102         AlertDialog.Builder mBuilder = new AlertDialog.Builder(context);
103         // mBuilder.setIcon(R.drawable.ic_launcher);
104         // mBuilder.setTitle("单选框显示");
105 
106         // checkedItem默认选择的位置参数
107         mBuilder.setSingleChoiceItems(items, 0, new DialogInterface.OnClickListener() {
108 
109             @Override
110             public void onClick(DialogInterface dialog, int which) {
111                 Toast.makeText(context, items[which], Toast.LENGTH_SHORT).show();
112                 dialog.dismiss();
113 
114             }
115         });
116 
117         AlertDialog dialog = mBuilder.create();
118         dialog.setIcon(R.drawable.ic_launcher);
119         dialog.setTitle("单选框显示");
120         dialog.show();
121 
122     }
123 
124     // 复选框类型显示
125     private void multiChoiceShow() {
126 
127         final String[] items = new String[3];
128         for (int i = 0; i < 3; i++) {
129             items[i] = "选项--" + i;
130         }
131 
132         AlertDialog.Builder mBuilder = new AlertDialog.Builder(context);
133 
134         // checkedItems为默认勾选的状态
135         final boolean[] checkedItems = { false, true, false };
136         // 这个监听的作用是用于检测item选中状态的变化
137         mBuilder.setMultiChoiceItems(items, checkedItems, new DialogInterface.OnMultiChoiceClickListener() {
138 
139             @Override
140             public void onClick(DialogInterface dialog, int which, boolean isChecked) {
141 
142             }
143         });
144 
145         AlertDialog dialog = mBuilder.create();
146         dialog.setIcon(R.drawable.ic_launcher);
147         dialog.setTitle("复选框显示");
148 
149         // 用于确定，知道用户勾选了那些选项
150         dialog.setButton(DialogInterface.BUTTON_POSITIVE, "确定", new DialogInterface.OnClickListener() {
151 
152             @Override
153             public void onClick(DialogInterface dialog, int which) {
154 
155                 String s = "";
156                 for (int i = 0; i < items.length; i++) {
157                     if (checkedItems[i])
158                         s += items[i] + "
";
159                 }
160                 Toast.makeText(context, s, Toast.LENGTH_SHORT).show();
161             }
162         });
163 
164         // 用于取消
165         dialog.setButton(DialogInterface.BUTTON_NEUTRAL, "取消", new DialogInterface.OnClickListener() {
166 
167             @Override
168             public void onClick(DialogInterface dialog, int which) {
169 
170             }
171         });
172 
173         dialog.show();
174     }
175 
176     
177     //自定义类型显示
178     private void myDialogShow(){
179         
180         AlertDialog.Builder mBuilder = new AlertDialog.Builder(context);
181         
182         mBuilder.setView(getLayoutInflater().inflate(R.layout.my_dialog, null));
183         
184         AlertDialog dialog=mBuilder.create();
185 //        dialog.setIcon(R.drawable.ic_launcher);
186 //        dialog.setTitle("自定义的对话框");
187         dialog.show();
188     }
189     
190     @Override
191     public void onClick(View v) {
192 
193         switch (v.getId()) {
194         case R.id.horizontally:
195             
196             horizontallyShow();
197             break;
198         case R.id.vertical:
199             
200             verticalShow();
201             break;
202         case R.id.singleChoice:
203 
204             singleChoiceShow();
205             break;
206         case R.id.multiChoice:
207 
208             multiChoiceShow();
209             break;
210         case R.id.myDialog:
211             myDialogShow();
212             break;
213             
214         }
215     }
216 
217 }

自定义的布局my_dialog.xml：

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:background="#80CBC4"
 4     android:layout_width="match_parent"
 5     android:layout_height="match_parent"
 6     android:orientation="vertical" >
 7 
 8     <ImageView
 9         android:layout_width="wrap_content"
10         android:layout_height="wrap_content"
11         android:layout_gravity="center_horizontal"
12         android:src="@drawable/ic_launcher" />
13 
14     <TextView
15         android:layout_width="wrap_content"
16         android:layout_height="wrap_content"
17         android:layout_gravity="center_horizontal"
18         android:text="www.cnblogs.com/zzw1994"
19         android:textColor="@android:color/holo_red_light" />
20 
21 </LinearLayout>