属性储存工具类SpUtils

属性储存工具类SharedPreferencesUtils

package com.flyou.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 {  /**   * 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 flyou   *    */  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();    }  }}