OSC存储配置数据方式有两种，一种是shraredPreference 另一种是property

相比前者，使用propertys 存储数据有如下优点： 

1.占用空间小,方便加密 ，

2.单纯的文件存储,代码比较容易理解.

3.Property 应该比xml 应该读取更快,但是具体没有测试

OSC中关于cookie token 图片路径等一些琐碎的数据都是通过property存储的。

用法如下， 在实际开发中其实也可以Properties.get(String key) 返回的是 object

代码在AppConfig.java中

public String get(String key) {Properties props = get();return (props != null) ? props.getProperty(key) : null;}public Properties get() {FileInputStream fis = null;Properties props = new Properties();try {// 读取files目录下的config// fis = activity.openFileInput(APP_CONFIG);// 读取app_config目录下的configFile dirConf = mContext.getDir(APP_CONFIG, Context.MODE_PRIVATE);fis = new FileInputStream(dirConf.getPath() + File.separator+ APP_CONFIG);props.load(fis);} catch (Exception e) {} finally {try {fis.close();} catch (Exception e) {}}return props;}private void setProps(Properties p) {FileOutputStream fos = null;try {// 把config建在files目录下// fos = activity.openFileOutput(APP_CONFIG, Context.MODE_PRIVATE);// 把config建在(自定义)app_config的目录下File dirConf = mContext.getDir(APP_CONFIG, Context.MODE_PRIVATE);File conf = new File(dirConf, APP_CONFIG);fos = new FileOutputStream(conf);p.store(fos, null);fos.flush();} catch (Exception e) {e.printStackTrace();} finally {try {fos.close();} catch (Exception e) {}}}public void set(Properties ps) {Properties props = get();props.putAll(ps);setProps(props);}public void set(String key, String value) {Properties props = get();props.setProperty(key, value);setProps(props);}public void remove(String... key) {Properties props = get();for (String k : key)props.remove(k);setProps(props);}

加密处理类如下 配合上面的property 就可以对一下配置信息进行加密了。

/** * 加密解密工具包 * @author Winter Lau * @date 2011-12-26 */public class CyptoUtils {	public static final String ALGORITHM_DES = "DES/CBC/PKCS5Padding";	    /**     * DES算法，加密     *     * @param data 待加密字符串     * @param key  加密私钥，长度不能够小于8位     * @return 加密后的字节数组，一般结合Base64编码使用     * @throws InvalidAlgorithmParameterException      * @throws Exception      */    public static String encode(String key,String data) {    	if(data == null)    		return null;    	try{	    	DESKeySpec dks = new DESKeySpec(key.getBytes());	    		    	SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");	        //key的长度不能够小于8位字节	        Key secretKey = keyFactory.generateSecret(dks);	        Cipher cipher = Cipher.getInstance(ALGORITHM_DES);	        IvParameterSpec iv = new IvParameterSpec("12345678".getBytes());	        AlgorithmParameterSpec paramSpec = iv;	        cipher.init(Cipher.ENCRYPT_MODE, secretKey,paramSpec);           	        byte[] bytes = cipher.doFinal(data.getBytes());            	        return byte2hex(bytes);    	}catch(Exception e){    		e.printStackTrace();    		return data;    	}    }    /**     * DES算法，解密     *     * @param data 待解密字符串     * @param key  解密私钥，长度不能够小于8位     * @return 解密后的字节数组     * @throws Exception 异常     */    public static String decode(String key,String data) {    	if(data == null)    		return null;        try {	    	DESKeySpec dks = new DESKeySpec(key.getBytes());	    	SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");            //key的长度不能够小于8位字节            Key secretKey = keyFactory.generateSecret(dks);            Cipher cipher = Cipher.getInstance(ALGORITHM_DES);            IvParameterSpec iv = new IvParameterSpec("12345678".getBytes());            AlgorithmParameterSpec paramSpec = iv;            cipher.init(Cipher.DECRYPT_MODE, secretKey, paramSpec);            return new String(cipher.doFinal(hex2byte(data.getBytes())));        } catch (Exception e){    		e.printStackTrace();    		return data;        }    }	/**	 * 二行制转字符串	 * @param b	 * @return	 */    private static String byte2hex(byte[] b) {		StringBuilder hs = new StringBuilder();		String stmp;		for (int n = 0; b!=null && n < b.length; n++) {			stmp = Integer.toHexString(b[n] & 0XFF);			if (stmp.length() == 1)				hs.append('0');			hs.append(stmp);		}		return hs.toString().toUpperCase();	}        private static byte[] hex2byte(byte[] b) {        if((b.length%2)!=0)            throw new IllegalArgumentException();		byte[] b2 = new byte[b.length/2];		for (int n = 0; n < b.length; n+=2) {		    String item = new String(b,n,2);		    b2[n/2] = (byte)Integer.parseInt(item,16);		}        return b2;    }    }