android 工具类之SharePreference

 1 /** 
 2  * SharedPreferences的一个工具类，调用setParam就能保存String, Integer, Boolean, Float, Long类型的参数 
 3  * 同样调用getParam就能获取到保存在手机里面的数据 
 4  * @author xiaanming 
 5  * 
 6  */  
 7 public class SharedPreferencesUtils {  
 8     /** 
 9      * 保存在手机里面的文件名 
10      */  
11     private static final String FILE_NAME = "share_date";  
12       
13       
14     /** 
15      * 保存数据的方法，我们需要拿到保存数据的具体类型，然后根据类型调用不同的保存方法 
16      * @param context 
17      * @param key 
18      * @param object  
19      */  
20     public static void setParam(Context context , String key, Object object){  
21           
22         String type = object.getClass().getSimpleName();  
23         SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);  
24         SharedPreferences.Editor editor = sp.edit();  
25           
26         if("String".equals(type)){  
27             editor.putString(key, (String)object);  
28         }  
29         else if("Integer".equals(type)){  
30             editor.putInt(key, (Integer)object);  
31         }  
32         else if("Boolean".equals(type)){  
33             editor.putBoolean(key, (Boolean)object);  
34         }  
35         else if("Float".equals(type)){  
36             editor.putFloat(key, (Float)object);  
37         }  
38         else if("Long".equals(type)){  
39             editor.putLong(key, (Long)object);  
40         }  
41           
42         editor.commit();  
43     }  
44       
45       
46     /** 
47      * 得到保存数据的方法，我们根据默认值得到保存的数据的具体类型，然后调用相对于的方法获取值 
48      * @param context 
49      * @param key 
50      * @param defaultObject 
51      * @return 
52      */  
53     public static Object getParam(Context context , String key, Object defaultObject){  
54         String type = defaultObject.getClass().getSimpleName();  
55         SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);  
56           
57         if("String".equals(type)){  
58             return sp.getString(key, (String)defaultObject);  
59         }  
60         else if("Integer".equals(type)){  
61             return sp.getInt(key, (Integer)defaultObject);  
62         }  
63         else if("Boolean".equals(type)){  
64             return sp.getBoolean(key, (Boolean)defaultObject);  
65         }  
66         else if("Float".equals(type)){  
67             return sp.getFloat(key, (Float)defaultObject);  
68         }  
69         else if("Long".equals(type)){  
70             return sp.getLong(key, (Long)defaultObject);  
71         }  
72           
73         return null;  
74     }  
75 }  

    SharedPreferencesUtils.setParam(this, "String", "xiaanming");  
    SharedPreferencesUtils.setParam(this, "int", 10);  
    SharedPreferencesUtils.setParam(this, "boolean", true);  
    SharedPreferencesUtils.setParam(this, "long", 100L);  
    SharedPreferencesUtils.setParam(this, "float", 1.1f);  

1     SharedPreferencesUtils.getParam(TimerActivity.this, "String", "");                                                                                        SharedPreferencesUtils.getParam(TimerActivity.this, "int", 0);  
2     SharedPreferencesUtils.getParam(TimerActivity.this, "boolean", false);  
3     SharedPreferencesUtils.getParam(TimerActivity.this, "long", 0L);  
4     SharedPreferencesUtils.getParam(TimerActivity.this, "float", 0.0f);