相信的这个最简单的存储方式大家都很熟悉了，但是有一个小小技巧，也许你没有用过，今天就跟大家分享一下，我们可以把SharedPreferences封装在一个工具类中，当我们需要写数据和读数据的时候，就可以直接通过工具类的set和get方法来完成，类似JavaBean，这样使用起来就比较方便，快捷（建议项目中使用次数比较多使用）。好了，直接看看这段简单的代码吧：

public class SharePreferenceUtil {    private SharedPreferences sp;    private SharedPreferences.Editor editor;    public SharePreferenceUtil(Context context, String file) {        sp = context.getSharedPreferences(file, context.MODE_PRIVATE);        editor = sp.edit();    }    // 用户的密码    public void setPasswd(String passwd) {        editor.putString("passwd", passwd);        editor.commit();    }    public String getPasswd() {        return sp.getString("passwd", "");    }    // 用户的id，即QQ号    public void setId(String id) {        editor.putString("id", id);        editor.commit();    }    public String getId() {        return sp.getString("id", "");    }    // 用户的昵称    public String getName() {        return sp.getString("name", "");    }    public void setName(String name) {        editor.putString("name", name);        editor.commit();    }    // 用户的邮箱    public String getEmail() {        return sp.getString("email", "");    }    public void setEmail(String email) {        editor.putString("email", email);        editor.commit();    }    // 用户自己的头像    public Integer getImg() {        return sp.getInt("img", 0);    }    public void setImg(int i) {        editor.putInt("img", i);        editor.commit();    }    // ip    public void setIp(String ip) {        editor.putString("ip", ip);        editor.commit();    }    public String getIp() {        return sp.getString("ip", Constants.SERVER_IP);    }    // 端口    public void setPort(int port) {        editor.putInt("port", port);        editor.commit();    }    public int getPort() {        return sp.getInt("port", Constants.SERVER_PORT);    }    // 是否在后台运行标记    public void setIsStart(boolean isStart) {        editor.putBoolean("isStart", isStart);        editor.commit();    }    public boolean getIsStart() {        return sp.getBoolean("isStart", false);    }    // 是否第一次运行本应用    public void setIsFirst(boolean isFirst) {        editor.putBoolean("isFirst", isFirst);        editor.commit();    }    public boolean getisFirst() {        return sp.getBoolean("isFirst", true);    }}

第二种方法是更加简单方便：取值时只用传入context和对应的key，就能获取到对应的value；设值时，也是传入context和对应key和value即可，非常方便实用。

public class PreferenceUtils {    public static String getPrefString(Context context, String key,            final String defaultValue) {        final SharedPreferences settings = PreferenceManager                .getDefaultSharedPreferences(context);        return settings.getString(key, defaultValue);    }    public static void setPrefString(Context context, final String key,            final String value) {        final SharedPreferences settings = PreferenceManager                .getDefaultSharedPreferences(context);        settings.edit().putString(key, value).commit();    }    public static boolean getPrefBoolean(Context context, final String key,            final boolean defaultValue) {        final SharedPreferences settings = PreferenceManager                .getDefaultSharedPreferences(context);        return settings.getBoolean(key, defaultValue);    }    public static boolean hasKey(Context context, final String key) {        return PreferenceManager.getDefaultSharedPreferences(context).contains(                key);    }    public static void setPrefBoolean(Context context, final String key,            final boolean value) {        final SharedPreferences settings = PreferenceManager                .getDefaultSharedPreferences(context);        settings.edit().putBoolean(key, value).commit();    }    public static void setPrefInt(Context context, final String key,            final int value) {        final SharedPreferences settings = PreferenceManager                .getDefaultSharedPreferences(context);        settings.edit().putInt(key, value).commit();    }    public static int getPrefInt(Context context, final String key,            final int defaultValue) {        final SharedPreferences settings = PreferenceManager                .getDefaultSharedPreferences(context);        return settings.getInt(key, defaultValue);    }    public static void setPrefFloat(Context context, final String key,            final float value) {        final SharedPreferences settings = PreferenceManager                .getDefaultSharedPreferences(context);        settings.edit().putFloat(key, value).commit();    }    public static float getPrefFloat(Context context, final String key,            final float defaultValue) {        final SharedPreferences settings = PreferenceManager                .getDefaultSharedPreferences(context);        return settings.getFloat(key, defaultValue);    }    public static void setSettingLong(Context context, final String key,            final long value) {        final SharedPreferences settings = PreferenceManager                .getDefaultSharedPreferences(context);        settings.edit().putLong(key, value).commit();    }    public static long getPrefLong(Context context, final String key,            final long defaultValue) {        final SharedPreferences settings = PreferenceManager                .getDefaultSharedPreferences(context);        return settings.getLong(key, defaultValue);    }    public static void clearPreference(Context context,            final SharedPreferences p) {        final Editor editor = p.edit();        editor.clear();        editor.commit();    }}