学步园

 1 package com.luther.test;

 3 import com.luther.test.R;

 5 import android.content.SharedPreferences;

 6 import android.os.Bundle;

 7 import android.preference.CheckBoxPreference;

 8 import android.preference.EditTextPreference;

 9 import android.preference.ListPreference;

10 import android.preference.Preference;

11 import android.preference.Preference.OnPreferenceChangeListener;

12 import android.preference.Preference.OnPreferenceClickListener;

13 import android.preference.PreferenceActivity;

14 import android.preference.PreferenceManager;

15 import android.preference.PreferenceScreen;

16 import android.widget.Toast;

18 public class PreferenceDemoActivity extends PreferenceActivity 

19         implements OnPreferenceChangeListener, OnPreferenceClickListener{

21     private ListPreference mList1Prefs;

22     private ListPreference mList2Prefs;

23     private CheckBoxPreference mCheckPrefs;

24     private EditTextPreference mEditPrefs;

25     private SharedPreferences mSharedPrefs;

27     /** Called when the activity is first created. */

29     public void onCreate(Bundle savedInstanceState) {

30         super.onCreate(savedInstanceState);

31         addPreferencesFromResource(R.xml.preference);

32         initViews();

33     }

35     private void initViews(){

36         //得到以包命名的SharedPreferences

37         mSharedPrefs = PreferenceManager.getDefaultSharedPreferences(this);

39         mList1Prefs = (ListPreference) findPreference("key_call_config");

40         mList2Prefs = (ListPreference) findPreference("key_msg_config");

41         mCheckPrefs = (CheckBoxPreference) findPreference("switch");

42         mEditPrefs = (EditTextPreference) findPreference("autoreply_text_cpntent");

44         mList1Prefs.setOnPreferenceClickListener(this);

45         mList1Prefs.setOnPreferenceChangeListener(this);

46         mList2Prefs.setOnPreferenceChangeListener(this);

47         mList2Prefs.setOnPreferenceClickListener(this);

48     }

49 	public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, (此为回调函数)

52             Preference preference) {

53         if(preference == mEditPrefs){

54             String toastStr = mEditPrefs.getTitle() + "\n"

55                             + "Content: " + mEditPrefs.getText();

56             showToast(toastStr);

57         }

58         return super.onPreferenceTreeClick(preferenceScreen, preference);

59     }

61     public boolean onPreferenceClick(Preference preference) {

62         String prefsValue = mSharedPrefs.getString(preference.getKey(), "-1");

63         showToast(prefsValue);

64         return false;

65     }

67     public boolean onPreferenceChange(Preference preference, Object newValue) {  （此为回调函数）

69         if(mList1Prefs == preference){

70             String prefsValue = mSharedPrefs.getString(preference.getKey(), "-1");

71             showToast(prefsValue);

72         }

73         if(mList2Prefs == preference){

74             String prefsValue = newValue.toString();

75             showToast(prefsValue);

76             mList2Prefs.setValue(prefsValue);

77         }

78         return false;

79     }

81     private void showToast(String arg){

82         Toast.makeText(this, arg, Toast.LENGTH_SHORT).show();

83     } 

84     
85 }

程序原理：用一个ListPreference分别注册这两个监听器，然后用Tosat看他们在什么时候响应。

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" 
 3     android:title="@string/settings">
 4     <PreferenceCategory 
 5 　　　　android:title="@string/general_settings">
 6         <ListPreference
 7 　　　　　　　android:key="key_call_config"
 8             android:title="@string/incoming_call_come"
 9             android:dialogTitle="@string/incoming_call_come" 
10             android:entries="@array/response_entries"
11             android:entryValues="@array/response_entry_values"/>
12         <ListPreference 
13 　　　　　　　android:key="key_msg_config"
14             android:title="@string/message_come"
15             android:dialogTitle="@string/message_come" 
16             android:entries="@array/response_entries"
17             android:entryValues="@array/response_entry_values"/>
18     </PreferenceCategory>
19     
20     <PreferenceCategory 
21 　　　　　android:title="@string/user_defined_autoreply_settings">
22         <CheckBoxPreference 
23 　　　　　　　android:title="@string/autoreply_switch"
24             android:key="switch"/>
25         <EditTextPreference
26 　　　　　　　android:title="@string/user_defined_autoreply_text"
27             android:key="autoreply_text_cpntent"
28             android:dependency="switch"
29             android:dialogTitle="@string/user_defined_autoreply_text"
30             android:positiveButtonText="@android:string/ok"
31             android:negativeButtonText="@android:string/cancel"/>
33     </PreferenceCategory>
34 
35 </PreferenceScreen>

以下是ListPreference的Entries和EntryValues：

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <resources>
 3     <string-array name="response_entries">
 4         <item>静音</item>
 5         <item>振动</item>
 6         <item>正常响铃</item>
 7         <item>LED灯亮</item>
 8     </string-array>
 9     <string-array name="response_entry_values">
10         <item>0</item>
11         <item>1</item>
12         <item>2</item>
13         <item>3</item>
14     </string-array>
15     
16 </resources>

string.xml文件： 

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <resources>
 3     <string name="hello">Hello World, PreferenceDemoActivity!</string>
 4     <string name="app_name">PreferenceDemo</string>
 5     <string name="settings">设置</string>
 6     
 7     <string name="general_settings">常规设置</string>
 8     <string name="incoming_call_come">来电时</string>
 9     <string name="message_come">来短信时</string>
10 
11     
12     <string name="user_defined_autoreply_settings">自定义回复设置</string>
13     <string name="autoreply_switch">自动回复</string>
14     <string name="user_defined_autoreply_text">自动回复短信</string>
15 </resources>