android UI事件

 

Android开发之《Android应用开发揭秘》UI事件汇总

/*

 *  Android开发之《Android应用开发揭秘》UI事件汇总

 *  北京Android俱乐部群：167839253

 *  Created on: 2011-12-01

 *  Author: blueeagle

 *  Email: [e-mail]

 */

思想跑毛是很可怕的，最近去尝试了下创业，结果碰了一鼻子灰，公司乱七八糟的项目搞的焦头烂额。各种没有心情。还好，现在沉淀下来，继续android开发的征程。

以下是Android应用开发揭秘这本书第四章的关于UI的事件处理的总结。基本上都是可以复用的代码。存着日后方便。

1.EditView控件的setOnKeyListener方法。点击上下左右键或者中间键的时候可以出发该方法。代码如下。

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1.      myEditView.setOnKeyListener(new EditText.OnKeyListener(){  
2.   
3. @Override  
4. public boolean onKey(View v, int keyCode, KeyEvent event) {  
5.         myTextView.setText("文本框中内容是："+myEditView.getText().toString());  
6.         return false;// TODO Auto-generated method stub  
7. }  
8.      });  

myEditView.setOnKeyListener(new EditText.OnKeyListener(){@Overridepublic boolean onKey(View v, int keyCode, KeyEvent event) { myTextView.setText("文本框中内容是："+myEditView.getText().toString()); return false;// TODO Auto-generated method stub} });

2.RadioButton控件和RadioGroup控件的组合使用，代码如下：

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1.      myRadioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {  
2.   
3. @Override  
4. public void onCheckedChanged(RadioGroup group, int checkedId) {  
5.     // TODO Auto-generated method stub  
6.     if(checkedId == myRadioButton3.getId())  
7.     {  
8.         DisplayToast("正确答案："+myRadioButton3.getText()+"恭喜你回答正确");  
9.     }  
10.     else  
11.     {  
12.         DisplayToast("回答错误");  
13.     }  
14. }  
15. );  

myRadioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {@Overridepublic void onCheckedChanged(RadioGroup group, int checkedId) {// TODO Auto-generated method stubif(checkedId == myRadioButton3.getId()){DisplayToast("正确答案："+myRadioButton3.getText()+"恭喜你回答正确");}else{DisplayToast("回答错误");}}});

3.CheckBox控件的使用，代码如下：

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1. myCheckBox1.setOnCheckedChangeListener(new CheckBox.OnCheckedChangeListener(){  
2.     @Override  
3.     public void onCheckedChanged(CompoundButton buttonView,  
4.             boolean isChecked) {  
5.         // TODO Auto-generated method stub  
6.         if(myCheckBox1.isChecked()){  
7.             DisplayToast("你选择了："+myCheckBox1.getText());  
8.         }             
9.     }             
10.       });  

myCheckBox1.setOnCheckedChangeListener(new CheckBox.OnCheckedChangeListener(){@Overridepublic void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {// TODO Auto-generated method stubif(myCheckBox1.isChecked()){DisplayToast("你选择了："+myCheckBox1.getText());}} });

4.Button控件的使用，代码如下：

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1.      myButton1.setOnClickListener(new Button.OnClickListener(){  
2. @Override  
3. public void onClick(View v) {  
4. }             
5.      });  

myButton1.setOnClickListener(new Button.OnClickListener(){@Overridepublic void onClick(View v) {} });

4.Spinner控件的使用，代码如下：

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1. //Spinner控件需要跟ArrayAdapter绑定使用。   
2.     private static final String[] m_Countries = {"A型","B型","O型","AB型","未知类型"};  
3.     private Spinner mySpinner;  
4.     private ArrayAdapter<String> myAdapter;  
5.         mySpinner = (Spinner)findViewById(R.id.mySpinner1);          
6.         myAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,m_Countries);  
7.         //设置下拉列表风格   
8.         myAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);  
9.         //将adapter添加到mySpinner中  
10.         mySpinner.setAdapter(myAdapter);  
11.         //添加事件监听   
12.         mySpinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener(){  
13.             @Override  
14.             public void onItemSelected(AdapterView<?> arg0, View arg1,  
15.                     int arg2, long arg3) {  
16.                 // TODO Auto-generated method stub  
17.                 myTextView.setText("你的血型是"+ m_Countries[arg2]);  
18.                 arg0.setVisibility(View.VISIBLE);  
19.             }  
20.             @Override  
21.             public void onNothingSelected(AdapterView<?> arg0) {  
22.                 // TODO Auto-generated method stub  
23.                 DisplayToast("你什么也没选！");  
24.             }             
25.         });  

//Spinner控件需要跟ArrayAdapter绑定使用。private static final String[] m_Countries = {"A型","B型","O型","AB型","未知类型"};private Spinner mySpinner;private ArrayAdapter<String> myAdapter; mySpinner = (Spinner)findViewById(R.id.mySpinner1); myAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,m_Countries); //设置下拉列表风格 myAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); //将adapter添加到mySpinner中 mySpinner.setAdapter(myAdapter); //添加事件监听 mySpinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener(){@Overridepublic void onItemSelected(AdapterView<?> arg0, View arg1,int arg2, long arg3) {// TODO Auto-generated method stubmyTextView.setText("你的血型是"+ m_Countries[arg2]);arg0.setVisibility(View.VISIBLE);}@Overridepublic void onNothingSelected(AdapterView<?> arg0) {// TODO Auto-generated method stubDisplayToast("你什么也没选！");} });

5.AutoCompleteTextView的使用，代码如下：

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1. private static final String[] autoString = {"abcd1","abcd212","32123","32open","32add","android","windows","iphone","linux","mydirve","msnbmw","wocaonimalegebi"};  
2.     private ArrayAdapter<String> myAdapter1;  
3.     private AutoCompleteTextView myAutoCompleteTextView;  
4.         myAdapter1 = new ArrayAdapter<String>(this,android.R.layout.simple_dropdown_item_1line,autoString);  
5.         myAutoCompleteTextView = (AutoCompleteTextView)findViewById(R.id.myAutoCompleteTextView);  
6.         myAutoCompleteTextView.setAdapter(myAdapter1);  
7. 6.DatePicker、TimePicker以及Button的使用，代码如下：  
8.         myCalendar1 = Calendar.getInstance();  
9.         myTextView = (TextView)findViewById(R.id.myTextView);  
10.         myDatePicker = (DatePicker)findViewById(R.id.datePicker1);  
11.         myTimePicker = (TimePicker)findViewById(R.id.timePicker1);  
12.         myButton1 = (Button)findViewById(R.id.button1);  
13.         myButton2 = (Button)findViewById(R.id.button2);  
14.           
15.         //将日历初始化为当前系统时间，并设置其事件监听  
16.         myDatePicker.init(myCalendar1.get(Calendar.YEAR), myCalendar1.get(Calendar.MONTH), myCalendar1.get(Calendar.DAY_OF_MONTH), new DatePicker.OnDateChangedListener() {  
17.               
18.             @Override  
19.             public void onDateChanged(DatePicker view, int year, int monthOfYear,  
20.                     int dayOfMonth) {  
21.                 // 当日期更改时，在这里处理。  
22.                 // myCalendar1.set(year, month, day);  
23.             }  
24.         });  
25.         //获取TimePicker对象设置为24小时显示。  
26.         myTimePicker.setIs24HourView(true);  
27.         //监听时间改变   
28.         myTimePicker.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() {  
29.               
30.             @Override  
31.             public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {  
32.                 // TODO Auto-generated method stub  
33.                 // 当时间改变时，在这里处理。  
34.                 //myCalendar1.set(year, month, day, hourOfDay, minute);  
35.             }  
36.         });  
37.         //-----------按钮事件---------//  
38.         myButton1.setOnClickListener(new Button.OnClickListener(){  
39.             @Override  
40.             public void onClick(View v) {  
41.                 // 下面的NEW 是新建了一个调整日历的对话框  
42.                 new DatePickerDialog(AndroidUnleashed001Activity.this,new DatePickerDialog.OnDateSetListener(){  
43.                     @Override  
44.                     public void onDateSet(DatePicker view, int year,  
45.                             int monthOfYear, int dayOfMonth) {  
46.                         // TODO Auto-generated method stub  
47.                         //设置日历  
48.                     }             
49.                 },myCalendar1.get(Calendar.YEAR),myCalendar1.get(Calendar.MONTH), myCalendar1.get(Calendar.DAY_OF_MONTH)).show();  
50.             }  
51.         });          
52.         myButton2.setOnClickListener(new Button.OnClickListener(){  
53.             @Override  
54.             public void onClick(View v) {  
55.                 //下面的NEW 是新建了一个调整时间的对话框       
56.                 new TimePickerDialog(AndroidUnleashed001Activity.this, new TimePickerDialog.OnTimeSetListener() {  
57.                       
58.                     @Override  
59.                     public void onTimeSet(TimePicker view, int hourOfDay, int minute) {  
60.                         // TODO Auto-generated method stub                        
61.                     }  
62.                 }, myCalendar1.get(Calendar.HOUR_OF_DAY), myCalendar1.get(Calendar.MINUTE),true).show();  
63.             }             
64.         });  
65. }  

private static final String[] autoString = {"abcd1","abcd212","32123","32open","32add","android","windows","iphone","linux","mydirve","msnbmw","wocaonimalegebi"};private ArrayAdapter<String> myAdapter1;private AutoCompleteTextView myAutoCompleteTextView; myAdapter1 = new ArrayAdapter<String>(this,android.R.layout.simple_dropdown_item_1line,autoString); myAutoCompleteTextView = (AutoCompleteTextView)findViewById(R.id.myAutoCompleteTextView); myAutoCompleteTextView.setAdapter(myAdapter1);6.DatePicker、TimePicker以及Button的使用，代码如下： myCalendar1 = Calendar.getInstance(); myTextView = (TextView)findViewById(R.id.myTextView); myDatePicker = (DatePicker)findViewById(R.id.datePicker1); myTimePicker = (TimePicker)findViewById(R.id.timePicker1); myButton1 = (Button)findViewById(R.id.button1); myButton2 = (Button)findViewById(R.id.button2); //将日历初始化为当前系统时间，并设置其事件监听 myDatePicker.init(myCalendar1.get(Calendar.YEAR), myCalendar1.get(Calendar.MONTH), myCalendar1.get(Calendar.DAY_OF_MONTH), new DatePicker.OnDateChangedListener() {@Overridepublic void onDateChanged(DatePicker view, int year, int monthOfYear,int dayOfMonth) {// 当日期更改时，在这里处理。// myCalendar1.set(year, month, day);}}); //获取TimePicker对象设置为24小时显示。 myTimePicker.setIs24HourView(true); //监听时间改变 myTimePicker.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() {@Overridepublic void onTimeChanged(TimePicker view, int hourOfDay, int minute) {// TODO Auto-generated method stub// 当时间改变时，在这里处理。//myCalendar1.set(year, month, day, hourOfDay, minute);}}); //-----------按钮事件---------// myButton1.setOnClickListener(new Button.OnClickListener(){@Overridepublic void onClick(View v) {// 下面的NEW 是新建了一个调整日历的对话框new DatePickerDialog(AndroidUnleashed001Activity.this,new DatePickerDialog.OnDateSetListener(){@Overridepublic void onDateSet(DatePicker view, int year,int monthOfYear, int dayOfMonth) {// TODO Auto-generated method stub//设置日历}},myCalendar1.get(Calendar.YEAR),myCalendar1.get(Calendar.MONTH), myCalendar1.get(Calendar.DAY_OF_MONTH)).show();} }); myButton2.setOnClickListener(new Button.OnClickListener(){@Overridepublic void onClick(View v) {//下面的NEW 是新建了一个调整时间的对话框new TimePickerDialog(AndroidUnleashed001Activity.this, new TimePickerDialog.OnTimeSetListener() {@Overridepublic void onTimeSet(TimePicker view, int hourOfDay, int minute) {// TODO Auto-generated method stub}}, myCalendar1.get(Calendar.HOUR_OF_DAY), myCalendar1.get(Calendar.MINUTE),true).show();} });}

 

7.Menu的使用，代码如下：

1.XML方式实现

XML代码可以写成：

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1. <menu xmlns:android="http://schemas.android.com/apk/res/android">  
2. <item android:id="@+id/style_submenu" android:title="笔迹样式">  
3.  <menu>  
4.  <group android:id="@+id/style_group" android:checkableBehavior="single">  
5.   <item android:id="@+id/style" android:orderInCategory="1" android:title="铅笔" />   
6.   <item android:id="@+id/style" android:orderInCategory="2" android:title="钢笔" />   
7.   <item android:id="@+id/style" android:orderInCategory="3" android:title="毛笔" />   
8.   </group>  
9.   </menu>  
10.   </item>  
11.  <item android:id="@+id/color_submenu" android:title="笔迹颜色">  
12.  <menu>  
13.  <group android:id="@+id/color_group" android:checkableBehavior="single">  
14.   <item android:id="@+id/color" android:orderInCategory="0" android:title="蓝色" />   
15.   <item android:id="@+id/color" android:orderInCategory="1" android:title="绿色" />   
16.   <item android:id="@+id/color" android:orderInCategory="2" android:title="青色" />   
17.   <item android:id="@+id/color" android:orderInCategory="3" android:title="红色" />   
18.   </group>  
19.   </menu>  
20.   </item>  
21.  <item android:id="@+id/width_submenu" android:title="笔迹粗细">  
22.  <menu>  
23.  <group android:id="@+id/width_group" android:checkableBehavior="single">  
24.   <item android:id="@+id/width" android:orderInCategory="1" android:title="较细" />   
25.   <item android:id="@+id/width" android:orderInCategory="2" android:title="细" />   
26.   <item android:id="@+id/width" android:orderInCategory="3" android:title="中等" />   
27.   <item android:id="@+id/width" android:orderInCategory="4" android:title="粗" />   
28.   <item android:id="@+id/width" android:orderInCategory="5" android:title="较粗" />   
29.   </group>  
30.   </menu>  
31.   </item>  
32.   <item android:id="@+id/write" android:title="书写" />   
33.   <item android:id="@+id/erase" android:title="清除" />   
34.   <item android:id="@+id/clear" android:title="清屏" />  
35.   </menu>  

<menu xmlns:android="http://schemas.android.com/apk/res/android"><item android:id="@+id/style_submenu" android:title="笔迹样式"> <menu> <group android:id="@+id/style_group" android:checkableBehavior="single"> <item android:id="@+id/style" android:orderInCategory="1" android:title="铅笔" /> <item android:id="@+id/style" android:orderInCategory="2" android:title="钢笔" /> <item android:id="@+id/style" android:orderInCategory="3" android:title="毛笔" /> </group> </menu> </item> <item android:id="@+id/color_submenu" android:title="笔迹颜色"> <menu> <group android:id="@+id/color_group" android:checkableBehavior="single"> <item android:id="@+id/color" android:orderInCategory="0" android:title="蓝色" /> <item android:id="@+id/color" android:orderInCategory="1" android:title="绿色" /> <item android:id="@+id/color" android:orderInCategory="2" android:title="青色" /> <item android:id="@+id/color" android:orderInCategory="3" android:title="红色" /> </group> </menu> </item> <item android:id="@+id/width_submenu" android:title="笔迹粗细"> <menu> <group android:id="@+id/width_group" android:checkableBehavior="single"> <item android:id="@+id/width" android:orderInCategory="1" android:title="较细" /> <item android:id="@+id/width" android:orderInCategory="2" android:title="细" /> <item android:id="@+id/width" android:orderInCategory="3" android:title="中等" /> <item android:id="@+id/width" android:orderInCategory="4" android:title="粗" /> <item android:id="@+id/width" android:orderInCategory="5" android:title="较粗" /> </group> </menu> </item> <item android:id="@+id/write" android:title="书写" /> <item android:id="@+id/erase" android:title="清除" /> <item android:id="@+id/clear" android:title="清屏" /> </menu>

JAVA代码：

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1.    @Override  
2. public boolean onCreateOptionsMenu(Menu menu){  
3.     MenuInflater inflater = getMenuInflater();  
4.     inflater.inflate(R.menu.menu, menu);  
5.     return true;  
6. }  
7.    @Override  
8. public boolean onOptionsItemSelected(MenuItem item){  
9.     int item_id = item.getItemId();  
10.     switch (item_id)  
11.     {  
12.     case R.id.about1:  
13.         Intent intent = new Intent();  
14.           
15.         intent.setClass(AndroidUnleashed001Activity.this, Activity02.class);  
16.         startActivity(intent);  
17.         AndroidUnleashed001Activity.this.finish();  
18.         break;  
19.     case R.id.about2:  
20.         AndroidUnleashed001Activity.this.finish();  
21.         break;  
22.     }  
23.     return true;  
24. }  
25. .Menu.add方法实现  
26. public boolean onCreateOptionsMenu(Menu menu){  
27.     //MenuInflater inflater = getMenuInflater();  
28.     //inflater.inflate(R.menu.menu, menu);  
29.     menu.add(0,0,0,R.string.app_name);  
30.     menu.add(0,1,1,R.string.hello);  
31.     return true;  
32. }  

@Overridepublic boolean onCreateOptionsMenu(Menu menu){MenuInflater inflater = getMenuInflater();inflater.inflate(R.menu.menu, menu);return true;} @Overridepublic boolean onOptionsItemSelected(MenuItem item){int item_id = item.getItemId();switch (item_id){case R.id.about1:Intent intent = new Intent();intent.setClass(AndroidUnleashed001Activity.this, Activity02.class);startActivity(intent);AndroidUnleashed001Activity.this.finish();break;case R.id.about2:AndroidUnleashed001Activity.this.finish();break;}return true;}1.Menu.add方法实现public boolean onCreateOptionsMenu(Menu menu){//MenuInflater inflater = getMenuInflater();//inflater.inflate(R.menu.menu, menu); menu.add(0,0,0,R.string.app_name); menu.add(0,1,1,R.string.hello);return true;}

8.弹出对话框的使用，代码如下：

这个功能为弹出对话框，点击确定后弹出登录对话框，然后点击登录后弹出多线程对话框。

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1. Dialog dialog = new AlertDialog.Builder(AndroidUnleashed001Activity.this).setTitle("登录提示").setMessage("这里需要登录").setPositiveButton("确定", new DialogInterface.OnClickListener() {       
2.             @Override  
3.             public void onClick(DialogInterface dialog, int which) {  
4.                 // 点击确定转向登陆框   
5.                 LayoutInflater factory = LayoutInflater.from(AndroidUnleashed001Activity.this);  
6.                 //得到自定义对话框   
7.                 final View DialogView = factory.inflate(R.layout.pop, null);  
8.                 //创建对话框   
9.                 AlertDialog dlg = new AlertDialog.Builder(AndroidUnleashed001Activity.this).setTitle("登录框").setView(DialogView).setPositiveButton("确定", new DialogInterface.OnClickListener() {                   
10.                     private ProgressDialog myProgressDialog;  
11.                     @Override  
12.                     public void onClick(DialogInterface dialog, int which) {  
13.                         // 当输入完成后，点击确定开始登录。  
14.                         myProgressDialog = ProgressDialog.show(AndroidUnleashed001Activity.this, "请等待", "正在为您登陆",true);  
15.                         new Thread(){  
16.                             public void run(){  
17.                                 try{  
18.                                     sleep(3000);  
19.                                 }  
20.                                 catch(Exception e){  
21.                                     e.printStackTrace();  
22.                                 }  
23.                                 finally{  
24.                                     myProgressDialog.dismiss();  
25.                                 }  
26.                             }  
27.                         }.start();                        
28.                     }  
29.                 }).setNegativeButton("取消", new DialogInterface.OnClickListener() {  
30.                       
31.                     @Override  
32.                     public void onClick(DialogInterface dialog, int which) {  
33.                         // TODO Auto-generated method stub  
34.                         AndroidUnleashed001Activity.this.finish();  
35.                     }  
36.                 }).create();  
37.                 dlg.show();               
38.             }  
39.         }).setNegativeButton("退出", new DialogInterface.OnClickListener() {  
40.               
41.             @Override  
42.             public void onClick(DialogInterface dialog, int which) {  
43.                 // TODO Auto-generated method stub  
44.                 AndroidUnleashed001Activity.this.finish();  
45.             }  
46.         }).create();  
47.         dialog.show();  

Dialog dialog = new AlertDialog.Builder(AndroidUnleashed001Activity.this).setTitle("登录提示").setMessage("这里需要登录").setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// 点击确定转向登陆框LayoutInflater factory = LayoutInflater.from(AndroidUnleashed001Activity.this);//得到自定义对话框final View DialogView = factory.inflate(R.layout.pop, null);//创建对话框AlertDialog dlg = new AlertDialog.Builder(AndroidUnleashed001Activity.this).setTitle("登录框").setView(DialogView).setPositiveButton("确定", new DialogInterface.OnClickListener() {private ProgressDialog myProgressDialog;@Overridepublic void onClick(DialogInterface dialog, int which) {// 当输入完成后，点击确定开始登录。myProgressDialog = ProgressDialog.show(AndroidUnleashed001Activity.this, "请等待", "正在为您登陆",true);new Thread(){public void run(){try{sleep(3000);}catch(Exception e){e.printStackTrace();}finally{myProgressDialog.dismiss();}}}.start();}}).setNegativeButton("取消", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stubAndroidUnleashed001Activity.this.finish();}}).create();dlg.show();}}).setNegativeButton("退出", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stubAndroidUnleashed001Activity.this.finish();}}).create(); dialog.show();

9.ImageView的使用，代码如下：

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1. myImageButton1.setImageDrawable(getResources().getDrawable(R.drawable.logo2));  
2.           
3.         myImageButton1.setOnClickListener(new Button.OnClickListener(){  
4.   
5.             @Override  
6.             public void onClick(View v) {  
7.                 // TODO Auto-generated method stub  
8.                 Dialog mydialog = new AlertDialog.Builder(AndroidUnleashed003Activity.this).setTitle("提示")  
9.                 .setMessage("我是ImageButton1").setPositiveButton("确定",new DialogInterface.OnClickListener() {  
10.                       
11.                     @Override  
12.                     public void onClick(DialogInterface dialog, int which) {  
13.                         // TODO Auto-generated method stub  
14.                           
15.                     }  
16.                 }).create();  
17.                 mydialog.show();  
18.             }     
19.         });  

myImageButton1.setImageDrawable(getResources().getDrawable(R.drawable.logo2)); myImageButton1.setOnClickListener(new Button.OnClickListener(){@Overridepublic void onClick(View v) {// TODO Auto-generated method stubDialog mydialog = new AlertDialog.Builder(AndroidUnleashed003Activity.this).setTitle("提示").setMessage("我是ImageButton1").setPositiveButton("确定",new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stub}}).create();mydialog.show();} });

注意：如果要去掉ImageButton后面的背景色，使得ImageButton看起来更漂亮一些而不是有个边，则需要做：在XML文件中的属性里添加：“android:background="#00000000"”

10.Gallery的使用，拖动效果很炫，代码如下：

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1.  Gallery myGallery = (Gallery)findViewById(R.id.myGallery);          
2.         //添加ImageAdapter给Gallery对象          
3.         myGallery.setAdapter(new ImageAdapter(this));  
4.         myGallery.setBackgroundResource(R.drawable.background);  
5.         myGallery.setOnItemClickListener(new OnItemClickListener(){  
6.             @Override  
7.             public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,  
8.                     long arg3) {  
9.                 // TODO Auto-generated method stub  
10.                 Toast.makeText(AndroidUnleashed003Activity.this, "你选择了"+(arg2+1)+" 号图片 ", Toast.LENGTH_SHORT).show();  
11.             }             
12.         });                  
13.     }  
14. //另外，需要存放图片，存放图片的容器，需要使用一个类实现，这个类是ImageAdapter，继承于BaseAdapter。  
15. public class ImageAdapter extends BaseAdapter{  
16.     private Context myContext;  
17.     private Integer[] mImageIds = {  
18.             R.drawable.ic_launcher,  
19.             R.drawable.icon,  
20.             R.drawable.logo,  
21.             R.drawable.logo2,  
22.             R.drawable.logo,  
23.             R.drawable.ic_launcher,  
24.             R.drawable.icon,  
25.             R.drawable.logo,  
26.     };  
27.     public ImageAdapter(Context c){  
28.         myContext = c;  
29.     }  
30.     @Override  
31.     //获取图片的个数   
32.     public int getCount() {  
33.         // TODO Auto-generated method stub  
34.         return mImageIds.length;  
35.     }  
36.     @Override  
37.     //获取图片在库中的位置   
38.     public Object getItem(int arg0) {  
39.         // TODO Auto-generated method stub  
40.         return arg0;  
41.     }  
42.   
43.     @Override  
44.     //获取图片在库中的位置   
45.     public long getItemId(int arg0) {  
46.         // TODO Auto-generated method stub  
47.         return arg0;  
48.     }  
49.     @Override  
50.     public View getView(int position, View arg1, ViewGroup arg2) {  
51.         // TODO Auto-generated method stub  
52.         //return null;   
53.         ImageView myImageView = new ImageView(myContext);  
54.         //给ImageView设置资源   
55.         myImageView.setImageResource(mImageIds[position]);  
56.         //设置布局图片以120*120显示   
57.         //myImageView.setLayoutParams(new Gallery.LayoutParams(120,120));  
58.         //设置显示比例类型   
59.         //myImageView.setScaleType(ImageView.ScaleType.FIT_CENTER);  
60.         return myImageView;  
61.     }  
62. }  

Gallery myGallery = (Gallery)findViewById(R.id.myGallery); //添加ImageAdapter给Gallery对象 myGallery.setAdapter(new ImageAdapter(this)); myGallery.setBackgroundResource(R.drawable.background); myGallery.setOnItemClickListener(new OnItemClickListener(){@Overridepublic void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) {// TODO Auto-generated method stubToast.makeText(AndroidUnleashed003Activity.this, "你选择了"+(arg2+1)+" 号图片 ", Toast.LENGTH_SHORT).show();} }); }//另外，需要存放图片，存放图片的容器，需要使用一个类实现，这个类是ImageAdapter，继承于BaseAdapter。public class ImageAdapter extends BaseAdapter{private Context myContext;private Integer[] mImageIds = {R.drawable.ic_launcher,R.drawable.icon,R.drawable.logo,R.drawable.logo2,R.drawable.logo,R.drawable.ic_launcher,R.drawable.icon,R.drawable.logo,};public ImageAdapter(Context c){myContext = c;}@Override//获取图片的个数public int getCount() {// TODO Auto-generated method stubreturn mImageIds.length;}@Override//获取图片在库中的位置public Object getItem(int arg0) {// TODO Auto-generated method stubreturn arg0;}@Override//获取图片在库中的位置public long getItemId(int arg0) {// TODO Auto-generated method stubreturn arg0;}@Overridepublic View getView(int position, View arg1, ViewGroup arg2) {// TODO Auto-generated method stub//return null;ImageView myImageView = new ImageView(myContext);//给ImageView设置资源myImageView.setImageResource(mImageIds[position]);//设置布局图片以120*120显示//myImageView.setLayoutParams(new Gallery.LayoutParams(120,120));//设置显示比例类型//myImageView.setScaleType(ImageView.ScaleType.FIT_CENTER);return myImageView;}}

11.ImageSwitcher的使用，代码如下：

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1. //首先需要实现接口：   
2. extends Activity implements OnClickListener,ViewFactory  
3. //具体操作：   
4.         LinearLayout myMainView = new LinearLayout(this);  
5.         //创建ImageSwitcher对象   
6.         mySwitcher = new ImageSwitcher(this);  
7.         myMainView.addView(mySwitcher);  
8.         mySwitcher.setId(BUTTON_SWITCHER_ID);  
9.         mySwitcher.setFactory(this);  
10.         mySwitcher.setImageResource(mImageIds[index]);  
11.           
12.         setContentView(myMainView);  
13.           
14.         Button next = new Button(this);  
15.         next.setId(BUTTON_DOWN_ID);  
16.         next.setText("下一张");  
17.         next.setOnClickListener(this);  
18.         //LinearLayout.LayoutParams param = new LinearLayout.LayoutParams(200,200);  
19.         myMainView.addView(next);  
20.           
21.         Button pre = new Button(this);  
22.         pre.setId(BUTTON_UP_ID);  
23.         pre.setText("上一张");  
24.         pre.setOnClickListener(this);  
25.         myMainView.addView(pre);  
26.           
27.     }  
28.   
29.     private ImageSwitcher mySwitcher;  
30.     private static int index = 0;  
31.     //上一页，下一页的按钮索引和Switcher的对象ID  
32.     private static final int BUTTON_DOWN_ID = 0x123456;  
33.     private static final int BUTTON_UP_ID = 0x123457;  
34.     private static final int BUTTON_SWITCHER_ID = 0x123458;  
35.   
36. //实现OnClickListener接口的函数   
37.     @Override  
38.     public void onClick(View v) {  
39.         // TODO Auto-generated method stub  
40.         switch(v.getId()){  
41.         case BUTTON_DOWN_ID:  
42.             index++;  
43.             if(index>= mImageIds.length){  
44.                 index = 0;  
45.             }  
46.             mySwitcher.setImageResource(mImageIds[index]);  
47.             break;  
48.         case BUTTON_UP_ID:  
49.             index--;  
50.             if(index<0){  
51.                 index = mImageIds.length-1;  
52.             }  
53.             mySwitcher.setImageResource(mImageIds[index]);  
54.             break;  
55.             default:  
56.                 break;  
57.         }  
58.     }  
59.   
60.     //实现View.Factory接口的函数   
61.     @Override  
62.     public View makeView() {  
63.         // TODO Auto-generated method stub  
64.         return new ImageView(this);  
65.     }  

//首先需要实现接口：extends Activity implements OnClickListener,ViewFactory//具体操作： LinearLayout myMainView = new LinearLayout(this); //创建ImageSwitcher对象 mySwitcher = new ImageSwitcher(this); myMainView.addView(mySwitcher); mySwitcher.setId(BUTTON_SWITCHER_ID); mySwitcher.setFactory(this); mySwitcher.setImageResource(mImageIds[index]); setContentView(myMainView); Button next = new Button(this); next.setId(BUTTON_DOWN_ID); next.setText("下一张"); next.setOnClickListener(this); //LinearLayout.LayoutParams param = new LinearLayout.LayoutParams(200,200); myMainView.addView(next); Button pre = new Button(this); pre.setId(BUTTON_UP_ID); pre.setText("上一张"); pre.setOnClickListener(this); myMainView.addView(pre); } private ImageSwitcher mySwitcher; private static int index = 0; //上一页，下一页的按钮索引和Switcher的对象ID private static final int BUTTON_DOWN_ID = 0x123456; private static final int BUTTON_UP_ID = 0x123457; private static final int BUTTON_SWITCHER_ID = 0x123458;//实现OnClickListener接口的函数@Overridepublic void onClick(View v) {// TODO Auto-generated method stubswitch(v.getId()){case BUTTON_DOWN_ID:index++;if(index>= mImageIds.length){index = 0;}mySwitcher.setImageResource(mImageIds[index]);break;case BUTTON_UP_ID:index--;if(index<0){index = mImageIds.length-1;}mySwitcher.setImageResource(mImageIds[index]);break;default:break;}}//实现View.Factory接口的函数@Overridepublic View makeView() {// TODO Auto-generated method stubreturn new ImageView(this);}

12.GridView的使用，代码如下：

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1. //这个和Gallery的使用相似，也需要存图片在BaseAdapter中。  
2.         GridView myGridView = (GridView)findViewById(R.id.gridView1);  
3.         myGridView.setAdapter(new ImageAdapter(this));  
4.           
5.         myGridView.setBackgroundResource(R.drawable.background);  
6.         myGridView.setOnItemClickListener(new OnItemClickListener(){  
7.   
8.             @Override  
9.             public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,  
10.                     long arg3) {  
11.                 // TODO Auto-generated method stub  
12.                 Toast.makeText(AndroidUnleashed003Activity.this, "你选择了"+(arg2+1)+" 号图片 ", Toast.LENGTH_SHORT).show();  
13.             }  
14.               
15.         });  
16.     }  

//这个和Gallery的使用相似，也需要存图片在BaseAdapter中。 GridView myGridView = (GridView)findViewById(R.id.gridView1); myGridView.setAdapter(new ImageAdapter(this)); myGridView.setBackgroundResource(R.drawable.background); myGridView.setOnItemClickListener(new OnItemClickListener(){@Overridepublic void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) {// TODO Auto-generated method stubToast.makeText(AndroidUnleashed003Activity.this, "你选择了"+(arg2+1)+" 号图片 ", Toast.LENGTH_SHORT).show();} }); }

12.ScrollView的使用，代码如下：

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1. //要垂直滚动，使用ScrollView要水平滚动使用HorizontalScrollView。  
2.         myLayout = (LinearLayout)findViewById(R.id.myLayout);  
3.         myScllorView = (ScrollView)findViewById(R.id.myScrollView);  
4.         Button myButton = (Button)findViewById(R.id.myButton);  
5.           
6.         myButton.setOnClickListener(new Button.OnClickListener(){  
7.             private int mIndex = -1;  
8.             @Override  
9.             public void onClick(View v) {  
10.                 // TODO Auto-generated method stub  
11.                 TextView myTextView = new TextView(ScrollerViewActivity.this);  
12.                 myTextView.setText("Text View"+mIndex);  
13.                 LinearLayout.LayoutParams p = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);  
14.                 //增加一个TextView到现行布局中   
15.                 myLayout.addView(myTextView,p);  
16.                   
17.                 Button myButtonView = new Button(ScrollerViewActivity.this);  
18.                 myButtonView.setText("Button "+mIndex++);  
19.                 //增加一个Button到线性布局中  
20.                 myLayout.addView(myButtonView,p);  
21.                 //改变默认焦点切换   
22.                 //myButtonView.setOnKeyListener(newButtonKeyListener);  
23.                 //投递一个消息进行滚动   
24.                 //myHandler.post(myScolltoBottom);  
25.             }  
26.               
27.         });  
28.     }  

//要垂直滚动，使用ScrollView要水平滚动使用HorizontalScrollView。 myLayout = (LinearLayout)findViewById(R.id.myLayout); myScllorView = (ScrollView)findViewById(R.id.myScrollView); Button myButton = (Button)findViewById(R.id.myButton); myButton.setOnClickListener(new Button.OnClickListener(){ private int mIndex = -1;@Overridepublic void onClick(View v) {// TODO Auto-generated method stubTextView myTextView = new TextView(ScrollerViewActivity.this);myTextView.setText("Text View"+mIndex);LinearLayout.LayoutParams p = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);//增加一个TextView到现行布局中myLayout.addView(myTextView,p);Button myButtonView = new Button(ScrollerViewActivity.this);myButtonView.setText("Button "+mIndex++);//增加一个Button到线性布局中myLayout.addView(myButtonView,p);//改变默认焦点切换//myButtonView.setOnKeyListener(newButtonKeyListener);//投递一个消息进行滚动//myHandler.post(myScolltoBottom);} }); }

13.ProgressBar的使用，代码如下：

ProgressBarStyleHorizontal（长形进度条）

ProgressBarStyleLarge（圆形进度条）

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1. public class ProgressBarA extends Activity {  
2.     protected static final int GUI_STOP_NOTIFIER = 0x108;  
3.     protected static final int GUI_THREADING_NOTIFIER = 0x109;  
4.     private ProgressBar myProgress1;  
5.     private ProgressBar myProgress2;  
6.     private Button myButton;  
7.     private int intCounter;  
8.     /** Called when the activity is first created. */  
9.     @Override  
10.     public void onCreate(Bundle savedInstanceState) {  
11.         super.onCreate(savedInstanceState);  
12.         //设置窗口模式，因为需要显示进度条在标题栏   
13.         requestWindowFeature(Window.FEATURE_PROGRESS);  
14.         setProgressBarVisibility(true);  
15.         setContentView(R.layout.main);  
16.         //取得ProgressBar   
17.         myProgress1 = (ProgressBar)findViewById(R.id.myProgressBar01);  
18.         myProgress2 = (ProgressBar)findViewById(R.id.myProgressBar02);  
19.         myButton = (Button)findViewById(R.id.myButton);  
20.           
21.         myProgress1.setIndeterminate(false);  
22.         myProgress2.setIndeterminate(false);  
23.           
24.         myButton.setOnClickListener(new Button.OnClickListener(){  
25.   
26.             @Override  
27.             public void onClick(View v) {  
28.                 // TODO Auto-generated method stub  
29.                 myProgress1.setVisibility(View.VISIBLE);  
30.                 myProgress2.setVisibility(View.VISIBLE);  
31.                   
32.                 myProgress1.setMax(100);  
33.                 myProgress1.setProgress(0);  
34.                 myProgress2.setProgress(0);  
35.                   
36.                 //通过线程来改变Progress的值   
37.                   
38.                 new Thread(new Runnable(){  
39.   
40.                     @Override  
41.                     public void run() {  
42.                         // TODO Auto-generated method stub  
43.                         for(int i=0;i<10;i++){  
44.                             try{  
45.                                 intCounter=(i+1)*20;  
46.                                 Thread.sleep(1000);  
47.                                 if(i==4){  
48.                                     Message m = new Message();  
49.                                     m.what = ProgressBarA.GUI_STOP_NOTIFIER;  
50.                                     ProgressBarA.this.myMessageHandler.sendMessage(m);  
51.                                     break;  
52.                                 }  
53.                                 else{  
54.                                     Message m = new Message();  
55.                                     m.what = ProgressBarA.GUI_THREADING_NOTIFIER;  
56.                                     ProgressBarA.this.myMessageHandler.sendMessage(m);  
57.                                 }  
58.                             }  
59.                             catch(Exception e){  
60.                                 e.printStackTrace();  
61.                             }  
62.                         }  
63.                     }  
64.                       
65.                 }).start();  
66.             }  
67.               
68.         });  
69.     }  
70.     Handler myMessageHandler = new Handler(){  
71.         public void handleMessage(Message msg){  
72.             switch(msg.what){  
73.             case ProgressBarA.GUI_STOP_NOTIFIER:  
74.                 //myProgress1.setVisibility(View.GONE);  
75.                 //myProgress2.setVisibility(View.GONE);  
76.                 //Thread.currentThread().interrupt();  
77.                 break;  
78.             case ProgressBarA.GUI_THREADING_NOTIFIER:  
79.                 if(!Thread.currentThread().isInterrupted()){  
80.                 myProgress1.setProgress(intCounter);  
81.                 myProgress1.setProgress(intCounter);  
82.                 setProgress(intCounter*100);//设置标题栏中前景的一个进度条进度值  
83.                 //setSecondaryProgress(intCounter*100);//设置标题栏中后面的一个进度条进度值  
84.                 //Thread.currentThread().interrupt();  
85.                 }  
86.                 break;  
87.         }  
88.             super.handleMessage(msg);  
89.     }  
90.     };  
91. }  

public class ProgressBarA extends Activity { protected static final int GUI_STOP_NOTIFIER = 0x108;protected static final int GUI_THREADING_NOTIFIER = 0x109;private ProgressBar myProgress1;private ProgressBar myProgress2;private Button myButton;private int intCounter;/** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //设置窗口模式，因为需要显示进度条在标题栏 requestWindowFeature(Window.FEATURE_PROGRESS); setProgressBarVisibility(true); setContentView(R.layout.main); //取得ProgressBar myProgress1 = (ProgressBar)findViewById(R.id.myProgressBar01); myProgress2 = (ProgressBar)findViewById(R.id.myProgressBar02); myButton = (Button)findViewById(R.id.myButton); myProgress1.setIndeterminate(false); myProgress2.setIndeterminate(false); myButton.setOnClickListener(new Button.OnClickListener(){@Overridepublic void onClick(View v) {// TODO Auto-generated method stubmyProgress1.setVisibility(View.VISIBLE);myProgress2.setVisibility(View.VISIBLE);myProgress1.setMax(100);myProgress1.setProgress(0);myProgress2.setProgress(0);//通过线程来改变Progress的值new Thread(new Runnable(){@Overridepublic void run() {// TODO Auto-generated method stubfor(int i=0;i<10;i++){try{intCounter=(i+1)*20;Thread.sleep(1000);if(i==4){Message m = new Message();m.what = ProgressBarA.GUI_STOP_NOTIFIER;ProgressBarA.this.myMessageHandler.sendMessage(m);break;}else{Message m = new Message();m.what = ProgressBarA.GUI_THREADING_NOTIFIER;ProgressBarA.this.myMessageHandler.sendMessage(m);}}catch(Exception e){e.printStackTrace();}}}}).start();} }); } Handler myMessageHandler = new Handler(){ public void handleMessage(Message msg){ switch(msg.what){ case ProgressBarA.GUI_STOP_NOTIFIER://myProgress1.setVisibility(View.GONE);//myProgress2.setVisibility(View.GONE);//Thread.currentThread().interrupt();break;case ProgressBarA.GUI_THREADING_NOTIFIER:if(!Thread.currentThread().isInterrupted()){myProgress1.setProgress(intCounter);myProgress1.setProgress(intCounter);setProgress(intCounter*100);//设置标题栏中前景的一个进度条进度值//setSecondaryProgress(intCounter*100);//设置标题栏中后面的一个进度条进度值//Thread.currentThread().interrupt();}break; } super.handleMessage(msg); } };}

14.SeekBar的使用，代码如下：

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1. implements SeekBar.OnSeekBarChangeListener  
2. //实现OnSeekBarChangeListener接口   
3.     public void onProgressChanged(SeekBar seekBar, int progress,  
4.             boolean fromUser) {  
5.         // TODO Auto-generated method stub  
6.         myProgressText.setText("当前值："+ progress);  
7.     }  
8.     @Override  
9.     public void onStartTrackingTouch(SeekBar seekBar) {  
10.         // TODO Auto-generated method stub  
11.         myTrackingText.setText("正在调节");  
12.     }  
13.     @Override  
14.     public void onStopTrackingTouch(SeekBar seekBar) {  
15.         // TODO Auto-generated method stub  
16.         myTrackingText.setText("停止调节");  
17.     }  
18. }  

implements SeekBar.OnSeekBarChangeListener//实现OnSeekBarChangeListener接口public void onProgressChanged(SeekBar seekBar, int progress,boolean fromUser) {// TODO Auto-generated method stubmyProgressText.setText("当前值："+ progress);}@Overridepublic void onStartTrackingTouch(SeekBar seekBar) {// TODO Auto-generated method stubmyTrackingText.setText("正在调节");}@Overridepublic void onStopTrackingTouch(SeekBar seekBar) {// TODO Auto-generated method stubmyTrackingText.setText("停止调节");}}

15.Notification、NotificationManager的使用，代码如下：

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1.      myIntent = new Intent(Notification01.this,Notification02.class);  
2.      //主要是设置点击通知时显示内容的类   
3.      myPendingIntent = PendingIntent.getActivity(Notification01.this, 0, myIntent, 0);  
4.      //构造Notification对象   
5.      myNotification = new Notification();  
6.      myButton1.setOnClickListener(new  Button.OnClickListener(){  
7. @Override  
8. public void onClick(View v) {  
9.     // TODO Auto-generated method stub  
10.     //设置通知在状态栏显示的图标   
11.     myNotification.icon = R.drawable.ic_launcher;  
12.     myNotification.tickerText = "Button1的通知内容...";  
13.     //通知时发出默认的声音   
14.     myNotification.defaults = Notification.DEFAULT_SOUND;  
15.     //设置通知显示的参数   
16.     myNotification.setLatestEventInfo(Notification01.this,"Button1","Button1通知",myPendingIntent);  
17.     //可以理解为执行这个通知   
18.     myNotificationManager.notify(0,myNotification);  
19. }     
20.      });  

myIntent = new Intent(Notification01.this,Notification02.class); //主要是设置点击通知时显示内容的类 myPendingIntent = PendingIntent.getActivity(Notification01.this, 0, myIntent, 0); //构造Notification对象 myNotification = new Notification(); myButton1.setOnClickListener(new Button.OnClickListener(){@Overridepublic void onClick(View v) {// TODO Auto-generated method stub//设置通知在状态栏显示的图标myNotification.icon = R.drawable.ic_launcher;myNotification.tickerText = "Button1的通知内容...";//通知时发出默认的声音myNotification.defaults = Notification.DEFAULT_SOUND;//设置通知显示的参数myNotification.setLatestEventInfo(Notification01.this,"Button1","Button1通知",myPendingIntent);//可以理解为执行这个通知myNotificationManager.notify(0,myNotification);} });

16.ProgressDialog的使用，代码如下：

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1.      myButton01 = (Button)findViewById(R.id.Button1);  
2.      myButton02 = (Button)findViewById(R.id.Button2);  
3.      myButton01.setOnClickListener(new Button.OnClickListener(){  
4. @Override  
5. public void onClick(View v) {  
6.     // TODO Auto-generated method stub   
7.     //创建ProgressDialog对象   
8.     myProgressDialog = new ProgressDialog(ProgressDialogActivity.this);  
9.     //设置进度条风格，风格为圆形的，旋转的   
10.     myProgressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);  
11.     //设置ProgressDialog标题   
12.     myProgressDialog.setTitle("提示");  
13.     //设置ProgressDialog提示信息   
14.     myProgressDialog.setMessage("这是一个圆形进度条对话框");  
15.     //设置myProgressDialog标题图标   
16.     myProgressDialog.setIcon(R.drawable.ic_launcher);  
17.     //设置myProgressDialog的进度条是否不明确  
18.     myProgressDialog.setIndeterminate(false);  
19.     //设置myProgressDialog是否可以按退回键取消  
20.     myProgressDialog.setCancelable(true);  
21.     //设置myProgressDialog的一个Button  
22.     myProgressDialog.setButton("确定", new DialogInterface.OnClickListener() {  
23.           
24.         @Override  
25.         public void onClick(DialogInterface dialog, int which) {  
26.             // TODO Auto-generated method stub  
27.             //点击确定取消对话框   
28.             dialog.cancel();  
29.         }  
30.     });  
31.     //让ProgressDialog显示   
32.     myProgressDialog.show();  
33. }     
34.      });  
35.        
36.      myButton02.setOnClickListener(new Button.OnClickListener(){  
37. @Override  
38. public void onClick(View v) {  
39.     // TODO Auto-generated method stub  
40.     myCount = 0;  
41.     //创建ProgressDialog对象   
42.     myProgressDialog = new ProgressDialog(ProgressDialogActivity.this);  
43.     //设置进度条风格，风格为长形的。   
44.     myProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);  
45.     //设置ProgressDialog标题   
46.     myProgressDialog.setTitle("提示");  
47.     //设置ProgressDialog提示信息   
48.     myProgressDialog.setMessage("这是一个长形进度条对话框");  
49.     //设置myProgressDialog标题图标   
50.     myProgressDialog.setIcon(R.drawable.ic_launcher);  
51.     //设置myProgressDialog进度条进度   
52.     myProgressDialog.setProgress(100);  
53.     //设置myProgressDialog的进度条是否不明确  
54.     myProgressDialog.setIndeterminate(false);  
55.     //设置myProgressDialog是否可以按退回键取消  
56.     myProgressDialog.setCancelable(true);  
57.     //设置myProgressDialog的一个Button  
58.     myProgressDialog.setButton("确定", new DialogInterface.OnClickListener() {  
59.           
60.         @Override  
61.         public void onClick(DialogInterface dialog, int which) {  
62.             // TODO Auto-generated method stub  
63.             //点击确定取消对话框   
64.             dialog.cancel();  
65.         }  
66.     });  
67.     //让ProgressDialog显示   
68.     myProgressDialog.show();  
69.        new Thread(){  
70.         public void run(){  
71.             try{  
72.                 while(myCount <= 100){  
73.                     //由线程来控制进度  
74.                     myProgressDialog.setProgress(myCount++);  
75.                     Thread.sleep(100);  
76.                 }  
77.                 myProgressDialog.cancel();  
78.             }  
79.             catch(InterruptedException e){  
80.                 myProgressDialog.cancel();  
81.             }  
82.         }  
83.        }.start();  
84. }     
85.      });  

myButton01 = (Button)findViewById(R.id.Button1); myButton02 = (Button)findViewById(R.id.Button2); myButton01.setOnClickListener(new Button.OnClickListener(){@Overridepublic void onClick(View v) {// TODO Auto-generated method stub//创建ProgressDialog对象myProgressDialog = new ProgressDialog(ProgressDialogActivity.this);//设置进度条风格，风格为圆形的，旋转的myProgressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);//设置ProgressDialog标题myProgressDialog.setTitle("提示");//设置ProgressDialog提示信息myProgressDialog.setMessage("这是一个圆形进度条对话框");//设置myProgressDialog标题图标myProgressDialog.setIcon(R.drawable.ic_launcher);//设置myProgressDialog的进度条是否不明确myProgressDialog.setIndeterminate(false);//设置myProgressDialog是否可以按退回键取消myProgressDialog.setCancelable(true);//设置myProgressDialog的一个ButtonmyProgressDialog.setButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stub//点击确定取消对话框dialog.cancel();}});//让ProgressDialog显示myProgressDialog.show();} }); myButton02.setOnClickListener(new Button.OnClickListener(){@Overridepublic void onClick(View v) {// TODO Auto-generated method stubmyCount = 0;//创建ProgressDialog对象myProgressDialog = new ProgressDialog(ProgressDialogActivity.this);//设置进度条风格，风格为长形的。myProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);//设置ProgressDialog标题myProgressDialog.setTitle("提示");//设置ProgressDialog提示信息myProgressDialog.setMessage("这是一个长形进度条对话框");//设置myProgressDialog标题图标myProgressDialog.setIcon(R.drawable.ic_launcher);//设置myProgressDialog进度条进度myProgressDialog.setProgress(100);//设置myProgressDialog的进度条是否不明确myProgressDialog.setIndeterminate(false);//设置myProgressDialog是否可以按退回键取消myProgressDialog.setCancelable(true);//设置myProgressDialog的一个ButtonmyProgressDialog.setButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stub//点击确定取消对话框dialog.cancel();}});//让ProgressDialog显示myProgressDialog.show(); new Thread(){ public void run(){ try{ while(myCount <= 100){ //由线程来控制进度 myProgressDialog.setProgress(myCount++); Thread.sleep(100); } myProgressDialog.cancel(); } catch(InterruptedException e){ myProgressDialog.cancel(); } } }.start();} });

17.TabWidget的使用，代码如下：

要使用TabWidget，首先要了解TabHost，TabHost是一个用来存放Tab标签的容器。

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1. public class TabHostActivity extends TabActivity {  
2.     TabHost myTabHost;  
3.   
4.     /** Called when the activity is first created. */  
5.     @Override  
6.     public void onCreate(Bundle savedInstanceState) {  
7.         super.onCreate(savedInstanceState);  
8.         setContentView(R.layout.main);  
9.         //获取TabHost对象   
10.         myTabHost = getTabHost();  
11.         //为TabHost添加标签，新建一个newTabSpec(newTabSpec)设置其标签和图标(setIndicator)设置内容(setContent)  
12.         myTabHost.addTab(myTabHost.newTabSpec("tabHost1").setIndicator("TAB 1", getResources().getDrawable(R.drawable.ic_launcher)).setContent(R.id.myTabContent1));  
13.         myTabHost.addTab(myTabHost.newTabSpec("tabHost2").setIndicator("TAB 2", getResources().getDrawable(R.drawable.ic_launcher)).setContent(R.id.myTabContent2));  
14.         myTabHost.addTab(myTabHost.newTabSpec("tabHost3").setIndicator("TAB 3", getResources().getDrawable(R.drawable.ic_launcher)).setContent(R.id.myTabContent3));  
15.         //设置TabHost的背景颜色   
16.         myTabHost.setBackgroundColor(Color.argb(150, 22, 70, 150));  
17.         //设置当前显示哪个标签   
18.         myTabHost.setCurrentTab(1);  
19.         //标签切换事件处理setOnTabChangedListener  
20.         myTabHost.setOnTabChangedListener(new TabHost.OnTabChangeListener() {  
21.               
22.             @Override  
23.             public void onTabChanged(String tabId) {  
24.                 // TODO Auto-generated method stub  
25.                 Dialog dialog = new AlertDialog.Builder(TabHostActivity.this).setTitle("提示").setMessage("当前选中"+tabId).setPositiveButton("确定", new DialogInterface.OnClickListener() {  
26.                       
27.                     @Override  
28.                     public void onClick(DialogInterface dialog, int which) {  
29.                         // TODO Auto-generated method stub  
30.                         dialog.cancel();  
31.                     }  
32.                 }).create();  
33.                 dialog.show();  
34.             }  
35.         });  
36.     }  
37. }