Android Development Notes-passing class objects via Intent

The intent transitive class object in Android provides two ways of passing an object by implementing the Serializable interface, and one is passing an object by implementing the Parcelable interface.

The object required to be passed must implement one of the above 2 interfaces to pass directly through the intent.

Methods for passing these 2 kinds of objects in intent:

Bundle.putserializable (key,object);  Implements the Serializable interface object Bundle.putparcelable (Key, object); Objects that implement the Parcelable interface

The following are examples of the most common serializable methods:

Assume that the user information that is passed by the login interface (login) to the main interface (mainactivity) is logged in the Users class

First create a serialization class: User

Importjava.io.Serializable; Public classUserImplementsSerializable {Private intID; PrivateString UserName; PrivateString PWD;  Public Final voidSetID (intvalue) {ID=value; }     Public Final intGetID () {returnID; }         Public Final voidsetusername (String value) {UserName=value; }     Public FinalString GetUserName () {returnUserName; }       Public Final voidsetpwd (String value) {PWD=value; }     Public FinalString getpwd () {returnPWD; }        }

Login form to pass content after login

New Intent (); Intent.setclass (Login. this, mainactivity. class  New  bundle (); Bundle.putserializable ("user", user); Intent.putextras (bundle) ; this. startactivity (intent);

Receiving end

 This . getintent (); User= (user) Intent.getserializableextra ("User");

The above can achieve the object delivery.

Add:

If List<object> is passed, the list can be strongly converted to the serializable type, and the Object type must also implement the Serializable interface

Intent.putextras (Key, (Serializable) list)  

Receive

(list<yourobject>) Getintent (). getserializable (Key)

Android Development Notes-passing class objects via Intent