Android7.0文件共享

Android系统是基于Linux,可使并发读写同一文件来交换数据。

序列化和反序列化代码如下

序列化 组件中写入如下方法

    private void persisToFile(){        new Thread(new Runnable() {            @Override            public void run() {                User user = new User();                File dir = new File("./saved.cache");                if (!dir.exists())                    dir.mkdir();                File cachedFile = new File("./saved.cache");                ObjectOutputStream objectOutput = null;                try{                    objectOutput = new ObjectOutputStream(new FileOutputStream(cachedFile));                    objectOutput.writeObject(user);                } catch (FileNotFoundException e) {                    e.printStackTrace();                } catch (IOException e) {                    e.printStackTrace();                }            }        }).start();    } 

反序列化组件中写入

    private void recoverFromFile(){        new Thread(new Runnable() {            @Override            public void run() {                MainActivity.User user = null;                File cachedFile = new File("./saved.cache");                if (cachedFile.exists()){                    ObjectInputStream objectInputStream = null;                    try {                        objectInputStream = new ObjectInputStream(new FileInputStream(cachedFile));                        user = (MainActivity.User)objectInputStream.readObject();                    } catch (IOException e) {                        e.printStackTrace();                    } catch (ClassNotFoundException e) {                        e.printStackTrace();                    }                }            }        }).start();    }