Android中SharedPreferences 工具类的使用

来源：互联网发布：高级算法编辑：程序博客网时间：2024/05/20 07:34
该工具类属于SharedPreferences 轻量级存储的使用，主要用于存储简单的信息，直接可以调用，
使用方法是：
//存储数据
SPUtils .pet(上下文，key，values);
//拿到数据
SPUtils .get(上下文，key，values);这里的values在使用时可以为空“”
。还有很多方法，包括删除，更新之类的
package com.example.utils;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 static final String FILE_NAME = "share_data";      /**      *       * @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);      }      /**      *       * @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;      }      /**      * �Ƴ�ĳ��keyֵ�Ѿ���Ӧ��ֵ      * @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);      }      /**      * @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);      }      /**      * @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);      }      /**      *       * @param context      * @return      */      public static Map<String, ?> getAll(Context context)      {          SharedPreferences sp = context.getSharedPreferences(FILE_NAME,                  Context.MODE_PRIVATE);          return sp.getAll();      }      /**      *       * @author zhy      *       */      private static class SharedPreferencesCompat      {          private static final Method sApplyMethod = findApplyMethod();          /**          *           * @return          */          @SuppressWarnings({ "unchecked", "rawtypes" })          private static Method findApplyMethod()          {              try              {                  Class clz = SharedPreferences.Editor.class;                  return clz.getMethod("apply");              } catch (NoSuchMethodException e)              {              }              return null;          }          /**          *           * @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();          }      }  }
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