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How to serialize / deserialize an object in Android

Posted by admin
Mar - 14 - 2012
0 Comment

Hi,
Today i want to show you how you can serialize or deserialize an Object. I will take like example a String object, but there can be any type of Object.
To serialize an object means to make it a binary, and to deserialize it, means to make it from binary to the Object.
So let’s start.
This is the method for serializing a generic Object.

public class SerializeClass {
 public static byte[] serializeObject(Object o) { 
    ByteArrayOutputStream baos = new ByteArrayOutputStream(); 
 
    try { 
      ObjectOutput out = new ObjectOutputStream(baos); 
      out.writeObject(o); 
      out.close(); 
 
      // Get the bytes of the serialized object 
      byte[] buffer = baos.toByteArray(); 
 
      return buffer; 
    } catch(IOException ioe) { 
 
      return null; 
    } 
 }
 public static Object deserializeObject(byte[] b) { 
    try { 
      ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(b)); 
      Object object = in.readObject(); 
      in.close(); 
 
      return object; 
    } catch(ClassNotFoundException cnfe) { 
      Log.e("deserializeObject", "class not found error", cnfe); 
 
      return null; 
    } catch(IOException ioe) { 
      Log.e("deserializeObject", "io error", ioe); 
 
      return null; 
    } 
  } 
}

To call this methods you will do like this:
Your class must implement Serializable for this to work

public class MyClass implements Serializable {
 String text;
 
MyClass myClass = new MyClass();
byte[] binaryObject = SerializeClass.serializeObject(myClass);
MyClass deserializedMyClass = SerializeClass.deserializeObject(binaryObject);
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