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);