SPUtils SharedPreferences工具类，,SharedPrefer

SPUtils SharedPreferences工具类，,SharedPrefer

SharedPreferences工具类，作为存储和获取data下相关文件工具类，对SharedPreferences进行封装，使其使用更简单。```java import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Map;

import android.content.Context;  import android.content.SharedPreferences;public class SPUtils  {      public SPUtils()      {          /* cannot be instantiated */          throw new UnsupportedOperationException("cannot be instantiated");      }    /**      * 保存在手机里面的文件名      */      public static final String FILE_NAME = "share_data";    /**      * 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 put(Context context, String key, Object object)      {        SharedPreferences sp = context.getSharedPreferences(FILE_NAME,                  Context.MODE_PRIVATE);          SharedPreferences.Editor editor = sp.edit();        if (object instanceof String)          {              editor.putString(key, (String) object);          } else if (object instanceof Integer)          {              editor.putInt(key, (Integer) object);          } else if (object instanceof Boolean)          {              editor.putBoolean(key, (Boolean) object);          } else if (object instanceof Float)          {              editor.putFloat(key, (Float) object);          } else if (object instanceof Long)          {              editor.putLong(key, (Long) object);          } else          {              editor.putString(key, object.toString());          }        SharedPreferencesCompat.apply(editor);      }    /**      * 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 get(Context context, String key, Object defaultObject)      {          SharedPreferences sp = context.getSharedPreferences(FILE_NAME,                  Context.MODE_PRIVATE);        if (defaultObject instanceof String)          {              return sp.getString(key, (String) defaultObject);          } else if (defaultObject instanceof Integer)          {              return sp.getInt(key, (Integer) defaultObject);          } else if (defaultObject instanceof Boolean)          {              return sp.getBoolean(key, (Boolean) defaultObject);          } else if (defaultObject instanceof Float)          {              return sp.getFloat(key, (Float) defaultObject);          } else if (defaultObject instanceof Long)          {              return sp.getLong(key, (Long) defaultObject);          }        return null;      }    /**      * 移除某个key值已经对应的值      *       * @param context      * @param key      */      public static void remove(Context context, String key)      {          SharedPreferences sp = context.getSharedPreferences(FILE_NAME,                  Context.MODE_PRIVATE);          SharedPreferences.Editor editor = sp.edit();          editor.remove(key);          SharedPreferencesCompat.apply(editor);      }    /**      * 清除所有数据      *       * @param context      */      public static void clear(Context context)      {          SharedPreferences sp = context.getSharedPreferences(FILE_NAME,                  Context.MODE_PRIVATE);          SharedPreferences.Editor editor = sp.edit();          editor.clear();          SharedPreferencesCompat.apply(editor);      }    /**      * 查询某个key是否已经存在      *       * @param context      * @param key      * @return      */      public static boolean contains(Context context, String key)      {          SharedPreferences sp = context.getSharedPreferences(FILE_NAME,                  Context.MODE_PRIVATE);          return sp.contains(key);      }    /**      * 返回所有的键值对      *       * @param context      * @return      */      public static Map<String, ?> getAll(Context context)      {          SharedPreferences sp = context.getSharedPreferences(FILE_NAME,                  Context.MODE_PRIVATE);          return sp.getAll();      }    /**      * 创建一个解决SharedPreferencesCompat.apply方法的一个兼容类      *       * @author zhy      *       */      private static class SharedPreferencesCompat      {          private static final Method sApplyMethod = findApplyMethod();        /**          * 反射查找apply的方法          *           * @return          */          @SuppressWarnings({ "unchecked", "rawtypes" })          private static Method findApplyMethod()          {              try              {                  Class clz = SharedPreferences.Editor.class;                  return clz.getMethod("apply");              } catch (NoSuchMethodException e)              {              }            return null;          }        /**          * 如果找到则使用apply执行，否则使用commit          *           * @param editor          */          public static void apply(SharedPreferences.Editor editor)          {              try              {                  if (sApplyMethod != null)                  {                      sApplyMethod.invoke(editor);                      return;                  }              } catch (IllegalArgumentException e)              {              } catch (IllegalAccessException e)              {              } catch (InvocationTargetException e)              {              }              editor.commit();          }      }}

```