Android平台PreferenceActivity组件分析

 1 import android.content.Context;  
 2 import android.os.Bundle;  
 3 import android.preference.CheckBoxPreference;  
 4 import android.preference.Preference;  
 5 import android.preference.PreferenceActivity;  
 6 import android.preference.Preference.OnPreferenceChangeListener;  
 7 import android.preference.Preference.OnPreferenceClickListener;  
 8 import android.widget.Toast;  
 9  
10 public class CheckBoxActivity extends PreferenceActivity {  
11  
12     Context mContext = null;  
13     @Override  
14     protected void onCreate(Bundle savedInstanceState) {  
15     super.onCreate(savedInstanceState);  
16     // 从资源文件中添Preferences ，选择的值将会自动保存到SharePreferences  
17     addPreferencesFromResource(R.xml.checkbox);  
18       
19     mContext = this;  
20       
21     //CheckBoxPreference组件  
22     CheckBoxPreference mCheckbox0 = (CheckBoxPreference) findPreference("checkbox_0");  
23     mCheckbox0.setOnPreferenceClickListener(new OnPreferenceClickListener() {  
24           
25         @Override  
26         public boolean onPreferenceClick(Preference preference) {  
27         //这里可以监听到这个CheckBox 的点击事件  
28         return true;  
29         }  
30     });  
31       
32     mCheckbox0.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {  
33           
34         @Override  
35         public boolean onPreferenceChange(Preference arg0, Object newValue) {  
36         //这里可以监听到checkBox中值是否改变了  
37         //并且可以拿到新改变的值  
38           Toast.makeText(mContext, "checkBox_0改变的值为" +  (Boolean)newValue, Toast.LENGTH_LONG).show();    
39         return true;  
40         }  
41     });  
42  
43     CheckBoxPreference mCheckbox1 = (CheckBoxPreference) findPreference("checkbox_1");  
44     mCheckbox1.setOnPreferenceClickListener(new OnPreferenceClickListener() {  
45           
46         @Override  
47         public boolean onPreferenceClick(Preference preference) {  
48         //这里可以监听到这个CheckBox 的点击事件  
49         return true;  
50         }  
51     });  
52       
53     mCheckbox1.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {  
54           
55         @Override  
56         public boolean onPreferenceChange(Preference arg0, Object newValue) {  
57         //这里可以监听到checkBox中值是否改变了  
58         //并且可以拿到新改变的值  
59           Toast.makeText(mContext, "checkBox_1改变的值为" +  (Boolean)newValue, Toast.LENGTH_LONG).show();    
60         return true;  
61         }  
62     });  
63       
64     }  
65  
66 }  

 1 <?xml version="1.0" encoding="utf-8"?> 
 2 <PreferenceScreen 
 3   xmlns:android="http://schemas.android.com/apk/res/android"> 
 4     <PreferenceCategory android:title="EditTextPreference">   
 5     <EditTextPreference android:key="edit_0" 
 6         android:title="输入信息_A" 
 7         android:summary="请输入您的信息" 
 8         android:defaultValue="请输入信息" 
 9         android:dialogTitle="输入框"> 
10     </EditTextPreference> 
11           
12      <EditTextPreference android:key="edit_1" 
13         android:title="输入信息_B" 
14         android:summary="请输入您的信息" 
15         android:defaultValue="请输入信息" 
16         android:dialogTitle="输入框"> 
17     </EditTextPreference> 
18     </PreferenceCategory> 
19 </PreferenceScreen> 

 1 import android.content.Context;  
 2 import android.os.Bundle;  
 3 import android.preference.EditTextPreference;  
 4 import android.preference.PreferenceActivity;  
 5  
 6 public class EditTextActivity extends PreferenceActivity {  
 7  
 8     Context mContext = null;  
 9  
10     @Override  
11     protected void onCreate(Bundle savedInstanceState) {  
12     super.onCreate(savedInstanceState);  
13     // 从资源文件中添Preferences ，选择的值将会自动保存到SharePreferences  
14     addPreferencesFromResource(R.xml.edittext);  
15  
16     mContext = this;  
17  
18     // EditTextPreference组件  
19     EditTextPreference mEditText = (EditTextPreference) findPreference("edit_0");  
20       
21     //设置dialog按钮信息  
22     mEditText.setPositiveButtonText("确定");  
23     mEditText.setNegativeButtonText("取消");  
24       
25     //设置按钮图标  
26     mEditText.setDialogIcon(R.drawable.jay);  
27     }  
28  
29     
30 } 

 1 <?xml version="1.0" encoding="utf-8"?> 
 2 <resources> 
 3  
 4 <string-array name="auto_logout_time_key"> 
 5         <item>10 mins.</item> 
 6         <item>20 mins.</item> 
 7         <item>30 mins.</item> 
 8         <item>60 mins.</item> 
 9 </string-array> 
10  
11 <string-array name="auto_logout_time_value"> 
12         <item>600000</item> 
13         <item>1200000</item> 
14         <item>1800000</item> 
15         <item>3600000</item> 
16 </string-array> 
17 </resources>