属性储存工具类SpUtils

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();} }}

文画音，看似耳目所为，其实是内心世界的感受。