android 工具类之SharePreference

/** 
 * SharedPreferences的一个工具类，调用setParam就能保存String, Integer, Boolean, Float, Long类型的参数 
 * 同样调用getParam就能获取到保存在手机里面的数据 
 * @author xiaanming 
 * 
 */  
public class SharedPreferencesUtils {  
    /** 
     * 保存在手机里面的文件名 
     */  
    private static final String FILE_NAME = "share_date";  
      
      
    /** 
     * 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 
     * @param context 
     * @param key 
     * @param object  
     */  
    public static void setParam(Context context , String key, Object object){  
          
        String type = object.getClass().getSimpleName();  
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);  
        SharedPreferences.Editor editor = sp.edit();  
          
        if("String".equals(type)){  
            editor.putString(key, (String)object);  
        }  
        else if("Integer".equals(type)){  
            editor.putInt(key, (Integer)object);  
        }  
        else if("Boolean".equals(type)){  
            editor.putBoolean(key, (Boolean)object);  
        }  
        else if("Float".equals(type)){  
            editor.putFloat(key, (Float)object);  
        }  
        else if("Long".equals(type)){  
            editor.putLong(key, (Long)object);  
        }  
          
        editor.commit();  
    }  
      
      
    /** 
     * 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 
     * @param context 
     * @param key 
     * @param defaultObject 
     * @return 
     */  
    public static Object getParam(Context context , String key, Object defaultObject){  
        String type = defaultObject.getClass().getSimpleName();  
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);  
          
        if("String".equals(type)){  
            return sp.getString(key, (String)defaultObject);  
        }  
        else if("Integer".equals(type)){  
            return sp.getInt(key, (Integer)defaultObject);  
        }  
        else if("Boolean".equals(type)){  
            return sp.getBoolean(key, (Boolean)defaultObject);  
        }  
        else if("Float".equals(type)){  
            return sp.getFloat(key, (Float)defaultObject);  
        }  
        else if("Long".equals(type)){  
            return sp.getLong(key, (Long)defaultObject);  
        }  
          
        return null;  
    }  
}  

保存数据：

    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);  

获取数据：

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