android 对话框AlertDialog_Android

android 对话框AlertDialog。

API：

java.lang.Object
????	android.app.AlertDialog.Builder

使用AlertDialog.Builder创建对话框需要了解以下几个方法：

setTitle ：为对话框设置标题
setIcon ：为对话框设置图标
setMessage：为对话框设置内容
setView ：给对话框设置自定义样式
setItems ：设置对话框要显示的一个list，一般用于显示几个命令时。
setMultiChoiceItems ：用来设置对话框显示一系列的复选框。
setNeutralButton ? ?：
setPositiveButton ? ：给对话框添加"Yes"按钮
setNegativeButton ：对话框添加"No"按钮
create ：创建对话框
show ：显示对话框

下面我们来看一下最简单对话框。

这个对话框只是简单的显示内容，使用默认图标，没有按钮，不多说，贴代码：

[java]?view plaincopyprint?

new?AlertDialog.Builder(Lesson_01_Pic.this).setTitle("提示标题").setMessage("这是提示内容").show();???

(Lesson_02_Dia是类名，请换成自己的！！)

下面我们为这个对话框加个按钮，效果：

代码:

[java]?view plaincopyprint?

new?AlertDialog.Builder(Lesson_01_Pic.this)??
?????????.setTitle("这是标题")??
????????.setMessage("这是提示内容")???
????????.setPositiveButton("确定",???
????????new?DialogInterface.OnClickListener(){??
??????????????????public?void?onClick(DialogInterface?dialoginterface,?int?i){???
?????????????????????????????????//按钮事件???
????????????????????????????Toast.makeText(Lesson_01_Pic.this,?"确定",Toast.LENGTH_LONG).show();??
??????????????????????????????}???
??????????????????????}).show();???

添加按钮时，需要同时为该按钮指定监听器。

下面，我们修改一个图标，添加两个按钮，同时显示多个选项，先看下效果：

代码：

[c-sharp]?view plaincopyprint?

package?com.yfz;??
import?android.app.Activity;??
import?android.app.AlertDialog;??
import?android.app.Dialog;??
import?android.content.DialogInterface;??
import?android.content.DialogInterface.OnClickListener;??
import?android.content.DialogInterface.OnMultiChoiceClickListener;??
import?android.os.Bundle;??
import?android.view.View;??
import?android.widget.Button;??
import?android.widget.Toast;??
public?class?Lesson_02_Dia?extends?Activity?{??
????/**?Called?when?the?activity?is?first?created.?*/??
[email protected]
????public?void?onCreate(Bundle?savedInstanceState)?{??
????????super.onCreate(savedInstanceState);??
????????setContentView(R.layout.main);??
??????????
????????Button?button?=?(Button)findViewById(R.id.b01);??
????????button.setText("对话框");??
????????button.setOnClickListener(new?Button.OnClickListener(){??
[email protected]
????????????public?void?onClick(View?v)?{??
????????????????//选项数组??
????????????????String[]?choices={"Facebook","Twitter"};??
????????????????//Check判断数组，与选项对应??
????????????????boolean[]?chsBool?=?{true,false};??
?????????????????//包含多个选项及复选框的对话框??
????????????????AlertDialog?dialog?=?new?AlertDialog.Builder(Lesson_02_Dia.this)??
?????????????????????????.setIcon(android.R.drawable.btn_star_big_on)??
?????????????????????????.setTitle("调查")??
?????????????????????????.setMultiChoiceItems(choices,?chsBool,?multiClick)??
?????????????????????????.setPositiveButton("Yes",?onclick)??
?????????????????????????.setNegativeButton("No",??onclick).create();??
????????????????dialog.show();??
????????????}??
??????????????
????????});??
????}??
??????
????/**?
?????*?对话框复选框事件监听器?
?????*/??
????OnMultiChoiceClickListener?multiClick?=?new?OnMultiChoiceClickListener(){??
[email protected]
????????public?void?onClick(DialogInterface?dialog,?int?which,?boolean?isChecked)?{??
????????????Toast.makeText(Lesson_02_Dia.this,?"第"+(which+1)+"项,选中结果:"+isChecked,Toast.LENGTH_SHORT).show();??
????????}??
??????????
????};??
??????
????/**?
?????*?对话框按钮点击事件监听器?
?????*/??
????OnClickListener?onclick?=?new?OnClickListener()?{??
[email protected]
????????public?void?onClick(DialogInterface?dialog,?int?which)?{??
????????????switch?(which)?{??
????????????????case?Dialog.BUTTON_NEGATIVE:??
????????????????????Toast.makeText(Lesson_02_Dia.this,?"No..",??
????????????????????????????Toast.LENGTH_LONG).show();??
????????????????????break;??
????????????????case?Dialog.BUTTON_NEUTRAL:??
????????????????????Toast.makeText(Lesson_02_Dia.this,?"I?don't?know.",??
????????????????????????????Toast.LENGTH_LONG).show();??
????????????????????break;??
????????????????case?Dialog.BUTTON_POSITIVE:??
????????????????????Toast.makeText(Lesson_02_Dia.this,?"Yes!!",??
????????????????????????????Toast.LENGTH_LONG).show();??
????????????????????break;??
????????????}??
????????}??
????};??
}??

说明已经写在注释中了。

下面再介绍一种比较常用的式样，如图：

代码：

[java]?view plaincopyprint?

???@Override??
???public?void?onCreate(Bundle?savedInstanceState)?{??
???????super.onCreate(savedInstanceState);??
???????setContentView(R.layout.main);??
?????????
???????Button?button?=?(Button)findViewById(R.id.b01);??
???????button.setText("对话框");??
???????button.setOnClickListener(new?Button.OnClickListener(){??
????????@Override??
????????public?void?onClick(View?v)?{??
????????????//选项数组??
????????????String[]?choices={"新浪微博","校内","街旁"};??
?????????????????//包含多个选项的对话框??
????????????AlertDialog?dialog?=?new?AlertDialog.Builder(Lesson_02_Dia.this)??
?????????????????????.setIcon(android.R.drawable.btn_star)??
?????????????????????.setTitle("分享")??
?????????????????????.setItems(choices,?onselect).create();??
????????????dialog.show();??
????????}??
???????});??
???}??
?????
?????
/**?
?*?选项的事件监听器?
?*/??
???OnClickListener?onselect?=?new?OnClickListener()?{??
????@Override??
????public?void?onClick(DialogInterface?dialog,?int?which)?{??
????????//?TODO?Auto-generated?method?stub??
????????switch?(which)?{??
????????case?0:??
????????????Toast.makeText(Lesson_02_Dia.this,?"您选择了新浪微博.",Toast.LENGTH_SHORT).show();??
????????????break;??
????????case?1:??
????????????Toast.makeText(Lesson_02_Dia.this,?"您选择了校内",Toast.LENGTH_SHORT).show();??
????????????break;??
????????case?2:??
????????????Toast.makeText(Lesson_02_Dia.this,?"您选择了街旁",Toast.LENGTH_SHORT).show();??
????????????break;??
????}??
????}??
??????
???};??

好了，今天就写到这，改天写一下，如果在弹出框中做一个登陆界面。

继续补充...先上图...

页面login.xml：示例写的比较简单，布局大家可以自己完善、修改。

[xhtml]?view plaincopyprint?

<?xml?version="1.0"?encoding="utf-8"?>??
<TableLayout??
android:id="@+id/widget36"??
android:layout_width="fill_parent"??
android:layout_height="fill_parent"??
android:orientation="vertical"??
xmlns:android="http://schemas.android.com/apk/res/android"??
>??
<TextView??
android:id="@+id/widget37"??
android:layout_width="wrap_content"??
android:layout_height="wrap_content"??
android:text="用户名:"??
>??
</TextView>??
<EditText??
android:id="@+id/widget38"??
android:layout_width="wrap_content"??
android:layout_height="wrap_content"??
android:text=""??
android:textSize="18sp"??
>??
</EditText>??
<TextView??
android:id="@+id/widget39"??
android:layout_width="wrap_content"??
android:layout_height="wrap_content"??
android:text="密码:"??
>??
</TextView>??
<EditText??
android:id="@+id/widget40"??
android:layout_width="wrap_content"??
android:layout_height="wrap_content"??
android:text=""??
android:textSize="18sp"??
>??
</EditText>??
</TableLayout>??

代码 : (也比较简单)

[c-sharp]?view plaincopyprint?

LayoutInflater?factory?=?LayoutInflater.from(Lesson_02_Dia.this);??
//获得自定义对话框??
View?view?=?factory.inflate(R.layout.login,?null);??
??
AlertDialog?dialog02?=?new?AlertDialog.Builder(Lesson_02_Dia.this)??
?????.setIcon(android.R.drawable.btn_star)??
?????.setTitle("登录")??
???????.setView(view)??
???????.setPositiveButton("Yes",?onclick)??
???????.setNegativeButton("No",??onclick).create();??
dialog02.show(); ?本讲介绍一下Android基本组件：对话框AlertDialog。
?
API：
java.lang.Object
???? android.app.AlertDialog.Builder
?
?
使用AlertDialog.Builder创建对话框需要了解以下几个方法：
- setTitle ：为对话框设置标题
- setIcon ：为对话框设置图标
- setMessage：为对话框设置内容
- setView ：给对话框设置自定义样式
- setItems ：设置对话框要显示的一个list，一般用于显示几个命令时。
- setMultiChoiceItems ：用来设置对话框显示一系列的复选框。
- setNeutralButton ? ?：
- setPositiveButton ? ：给对话框添加"Yes"按钮
- setNegativeButton ：对话框添加"No"按钮
- create ：创建对话框
- show ：显示对话框
?
下面我们来看一下最简单对话框。
?

这个对话框只是简单的显示内容，使用默认图标，没有按钮，不多说，贴代码：

?
[java]?view plaincopyprint?
1. new?AlertDialog.Builder(Lesson_01_Pic.this).setTitle("提示标题").setMessage("这是提示内容").show();???
?
?
(Lesson_02_Dia是类名，请换成自己的！！)
?
?
下面我们为这个对话框加个按钮，效果：
?
?
代码:
?
[java]?view plaincopyprint?
1. new?AlertDialog.Builder(Lesson_01_Pic.this)??
2. ?????????.setTitle("这是标题")??
3. ????????.setMessage("这是提示内容")???
4. ????????.setPositiveButton("确定",???
5. ????????new?DialogInterface.OnClickListener(){??
6. ??????????????????public?void?onClick(DialogInterface?dialoginterface,?int?i){???
7. ?????????????????????????????????//按钮事件???
8. ????????????????????????????Toast.makeText(Lesson_01_Pic.this,?"确定",Toast.LENGTH_LONG).show();??
9. ??????????????????????????????}???
10. ??????????????????????}).show();???
?
?
?
添加按钮时，需要同时为该按钮指定监听器。
?
?
下面，我们修改一个图标，添加两个按钮，同时显示多个选项，先看下效果：
?
代码：
?
[c-sharp]?view plaincopyprint?
1. package?com.yfz;??
2. import?android.app.Activity;??
3. import?android.app.AlertDialog;??
4. import?android.app.Dialog;??
5. import?android.content.DialogInterface;??
6. import?android.content.DialogInterface.OnClickListener;??
7. import?android.content.DialogInterface.OnMultiChoiceClickListener;??
8. import?android.os.Bundle;??
9. import?android.view.View;??
10. import?android.widget.Button;??
11. import?android.widget.Toast;??
12. public?class?Lesson_02_Dia?extends?Activity?{??
13. ????/**?Called?when?the?activity?is?first?created.?*/??
14. [email protected]
15. ????public?void?onCreate(Bundle?savedInstanceState)?{??
16. ????????super.onCreate(savedInstanceState);??
17. ????????setContentView(R.layout.main);??
18. ??????????
19. ????????Button?button?=?(Button)findViewById(R.id.b01);??
20. ????????button.setText("对话框");??
21. ????????button.setOnClickListener(new?Button.OnClickListener(){??
22. [email protected]
23. ????????????public?void?onClick(View?v)?{??
24. ????????????????//选项数组??
25. ????????????????String[]?choices={"Facebook","Twitter"};??
26. ????????????????//Check判断数组，与选项对应??
27. ????????????????boolean[]?chsBool?=?{true,false};??
28. ?????????????????//包含多个选项及复选框的对话框??
29. ????????????????AlertDialog?dialog?=?new?AlertDialog.Builder(Lesson_02_Dia.this)??
30. ?????????????????????????.setIcon(android.R.drawable.btn_star_big_on)??
31. ?????????????????????????.setTitle("调查")??
32. ?????????????????????????.setMultiChoiceItems(choices,?chsBool,?multiClick)??
33. ?????????????????????????.setPositiveButton("Yes",?onclick)??
34. ?????????????????????????.setNegativeButton("No",??onclick).create();??
35. ????????????????dialog.show();??
36. ????????????}??
37. ??????????????
38. ????????});??
39. ????}??
40. ??????
41. ????/**?
42. ?????*?对话框复选框事件监听器?
43. ?????*/??
44. ????OnMultiChoiceClickListener?multiClick?=?new?OnMultiChoiceClickListener(){??
45. [email protected]
46. ????????public?void?onClick(DialogInterface?dialog,?int?which,?boolean?isChecked)?{??
47. ????????????Toast.makeText(Lesson_02_Dia.this,?"第"+(which+1)+"项,选中结果:"+isChecked,Toast.LENGTH_SHORT).show();??
48. ????????}??
49. ??????????
50. ????};??
51. ??????
52. ????/**?
53. ?????*?对话框按钮点击事件监听器?
54. ?????*/??
55. ????OnClickListener?onclick?=?new?OnClickListener()?{??
56. [email protected]
57. ????????public?void?onClick(DialogInterface?dialog,?int?which)?{??
58. ????????????switch?(which)?{??
59. ????????????????case?Dialog.BUTTON_NEGATIVE:??
60. ????????????????????Toast.makeText(Lesson_02_Dia.this,?"No..",??
61. ????????????????????????????Toast.LENGTH_LONG).show();??
62. ????????????????????break;??
63. ????????????????case?Dialog.BUTTON_NEUTRAL:??
64. ????????????????????Toast.makeText(Lesson_02_Dia.this,?"I?don't?know.",??
65. ????????????????????????????Toast.LENGTH_LONG).show();??
66. ????????????????????break;??
67. ????????????????case?Dialog.BUTTON_POSITIVE:??
68. ????????????????????Toast.makeText(Lesson_02_Dia.this,?"Yes!!",??
69. ????????????????????????????Toast.LENGTH_LONG).show();??
70. ????????????????????break;??
71. ????????????}??
72. ????????}??
73. ????};??
74. }??
?
?
?
说明已经写在注释中了。
?
下面再介绍一种比较常用的式样，如图：
?
代码：
?
[java]?view plaincopyprint?
1. ???@Override??
2. ???public?void?onCreate(Bundle?savedInstanceState)?{??
3. ???????super.onCreate(savedInstanceState);??
4. ???????setContentView(R.layout.main);??
5. ?????????
6. ???????Button?button?=?(Button)findViewById(R.id.b01);??
7. ???????button.setText("对话框");??
8. ???????button.setOnClickListener(new?Button.OnClickListener(){??
9. ????????@Override??
10. ????????public?void?onClick(View?v)?{??
11. ????????????//选项数组??
12. ????????????String[]?choices={"新浪微博","校内","街旁"};??
13. ?????????????????//包含多个选项的对话框??
14. ????????????AlertDialog?dialog?=?new?AlertDialog.Builder(Lesson_02_Dia.this)??
15. ?????????????????????.setIcon(android.R.drawable.btn_star)??
16. ?????????????????????.setTitle("分享")??
17. ?????????????????????.setItems(choices,?onselect).create();??
18. ????????????dialog.show();??
19. ????????}??
20. ???????});??
21. ???}??
22. ?????
23. ?????
24. /**?
25. ?*?选项的事件监听器?
26. ?*/??
27. ???OnClickListener?onselect?=?new?OnClickListener()?{??
28. ????@Override??
29. ????public?void?onClick(DialogInterface?dialog,?int?which)?{??
30. ????????//?TODO?Auto-generated?method?stub??
31. ????????switch?(which)?{??
32. ????????case?0:??
33. ????????????Toast.makeText(Lesson_02_Dia.this,?"您选择了新浪微博.",Toast.LENGTH_SHORT).show();??
34. ????????????break;??
35. ????????case?1:??
36. ????????????Toast.makeText(Lesson_02_Dia.this,?"您选择了校内",Toast.LENGTH_SHORT).show();??
37. ????????????break;??
38. ????????case?2:??
39. ????????????Toast.makeText(Lesson_02_Dia.this,?"您选择了街旁",Toast.LENGTH_SHORT).show();??
40. ????????????break;??
41. ????}??
42. ????}??
43. ??????
44. ???};??
?
?
?
好了，今天就写到这，改天写一下，如果在弹出框中做一个登陆界面。
?
?
继续补充...先上图...
?
页面login.xml：示例写的比较简单，布局大家可以自己完善、修改。
?
[xhtml]?view plaincopyprint?
1. <?xml?version="1.0"?encoding="utf-8"?>??
2. <TableLayout??
3. android:id="@+id/widget36"??
4. android:layout_width="fill_parent"??
5. android:layout_height="fill_parent"??
6. android:orientation="vertical"??
7. xmlns:android="http://schemas.android.com/apk/res/android"??
8. >??
9. <TextView??
10. android:id="@+id/widget37"??
11. android:layout_width="wrap_content"??
12. android:layout_height="wrap_content"??
13. android:text="用户名:"??
14. >??
15. </TextView>??
16. <EditText??
17. android:id="@+id/widget38"??
18. android:layout_width="wrap_content"??
19. android:layout_height="wrap_content"??
20. android:text=""??
21. android:textSize="18sp"??
22. >??
23. </EditText>??
24. <TextView??
25. android:id="@+id/widget39"??
26. android:layout_width="wrap_content"??
27. android:layout_height="wrap_content"??
28. android:text="密码:"??
29. >??
30. </TextView>??
31. <EditText??
32. android:id="@+id/widget40"??
33. android:layout_width="wrap_content"??
34. android:layout_height="wrap_content"??
35. android:text=""??
36. android:textSize="18sp"??
37. >??
38. </EditText>??
39. </TableLayout>??
?
?
?
代码 : (也比较简单)
?
[c-sharp]?view plaincopyprint?
1. LayoutInflater?factory?=?LayoutInflater.from(Lesson_02_Dia.this);??
2. //获得自定义对话框??
3. View?view?=?factory.inflate(R.layout.login,?null);??
4. ??
5. AlertDialog?dialog02?=?new?AlertDialog.Builder(Lesson_02_Dia.this)??
6. ?????.setIcon(android.R.drawable.btn_star)??
7. ?????.setTitle("登录")??
8. ???????.setView(view)??
9. ???????.setPositiveButton("Yes",?onclick)??
10. ???????.setNegativeButton("No",??onclick).create();??
11. dialog02.show(); ?
?