/** * SharedPreferences工具类 * * @author bobby * */public class SharedPreferencesUtils {    Context context;    String name;    public SharedPreferencesUtils(Context context, String name) {        this.context = context;        this.name = name;    }    /**     * 根据key和预期的value类型获取value的值     *     * @param key     * @param clazz     * @return     */    public 
    
      T getValue(String key, Class
     
       clazz) {        if (context == null) {            throw new RuntimeException("请先调用带有context，name参数的构造！");        }        SharedPreferences sp = this.context.getSharedPreferences(this.name, Context.MODE_PRIVATE);        return getValue(key, clazz, sp);    }    /**     * 针对复杂类型存储
      <对象>
            *     * @param key     * @param val     */    public void setObject(String key, Object object) {        SharedPreferences sp = this.context.getSharedPreferences(this.name, Context.MODE_PRIVATE);        ByteArrayOutputStream baos = new ByteArrayOutputStream();        ObjectOutputStream out = null;        try {            out = new ObjectOutputStream(baos);            out.writeObject(object);            String objectVal = new String(Base64.encode(baos.toByteArray(), Base64.DEFAULT));            Editor editor = sp.edit();            editor.putString(key, objectVal);            editor.commit();        } catch (IOException e) {            e.printStackTrace();        } finally {            try {                if (baos != null) {                    baos.close();                }                if (out != null) {                    out.close();                }            } catch (IOException e) {                e.printStackTrace();            }        }    }    @SuppressWarnings("unchecked")    public 
       
         T getObject(String key, Class
        
          clazz) {        SharedPreferences sp = this.context.getSharedPreferences(this.name, Context.MODE_PRIVATE);        if (sp.contains(key)) {            String objectVal = sp.getString(key, null);            byte[] buffer = Base64.decode(objectVal, Base64.DEFAULT);            ByteArrayInputStream bais = new ByteArrayInputStream(buffer);            ObjectInputStream ois = null;            try {                ois = new ObjectInputStream(bais);                T t = (T) ois.readObject();                return t;            } catch (StreamCorruptedException e) {                e.printStackTrace();            } catch (IOException e) {                e.printStackTrace();            } catch (ClassNotFoundException e) {                e.printStackTrace();            } finally {                try {                    if (bais != null) {                        bais.close();                    }                    if (ois != null) {                        ois.close();                    }                } catch (IOException e) {                    e.printStackTrace();                }            }        }        return null;    }    /**     * 对于外部不可见的过渡方法     *     * @param key     * @param clazz     * @param sp     * @return     */    @SuppressWarnings("unchecked")    private 
         
           T getValue(String key, Class
          
            clazz, SharedPreferences sp) { T t; try { t = clazz.newInstance(); if (t instanceof Integer) { return (T) Integer.valueOf(sp.getInt(key, 0)); } else if (t instanceof String) { return (T) sp.getString(key, ""); } else if (t instanceof Boolean) { return (T) Boolean.valueOf(sp.getBoolean(key, false)); } else if (t instanceof Long) { return (T) Long.valueOf(sp.getLong(key, 0L)); } else if (t instanceof Float) { return (T) Float.valueOf(sp.getFloat(key, 0L)); } } catch (InstantiationException e) { e.printStackTrace(); Log.e("system", "类型输入错误或者复杂类型无法解析[" + e.getMessage() + "]"); } catch (IllegalAccessException e) { e.printStackTrace(); Log.e("system", "类型输入错误或者复杂类型无法解析[" + e.getMessage() + "]"); } Log.e("system", "无法找到" + key + "对应的值"); return null; }}