Android：我可以将Java对象写入文件并在以后检索吗？

Question

I use Spannables with EditTexts.

So I want to store a object of Spannable to a file (or whatever the storage media) and retrieve it later.

(Don't reply with alternatives ways to store Spannable, I have tried most of them such as converting to html)

Is there a way to do this?

Answer 1

Yes, you can do with the use of Serialization. Read this page:

To serialize an object means to convert its state to a byte stream so that the byte stream can be reverted back into a copy of the object. A Java object is serializable if its class or any of its superclasses implements either the java.io.Serializable interface or its subinterface, java.io.Externalizable. Deserialization is the process of converting the serialized form of an object back into a copy of the object.

For example, the java.awt.Button class implements the Serializable interface, so you can serialize a java.awt.Button object and store that serialized state in a file. Later, you can read back the serialized state and deserialize into a java.awt.Button object.

This page has an example also. How to serialize and de-serialize an object.

And if you need a full code sniplet you can follow this -

I hpw this would help you.