Data transfer between two activities in Android

1. Passed through intent:

Set in activity1

:

A. Character transfer:

Java code

String text = "hello ";

Intent intent1 = new intent (activitymain. This, activity2.class );
Intent1.putextra ("activity1", text );

Startactivity (intent1 );

B. Upload objects. objects must be instantiated and serializable can be inherited.

Java code

Bundle mbundle = new bundle ();
Mbundle. putserializable ("user", userlist. Get (position ));

Intent in = new intent (getapplicationcontext (), activity2.class );
In. putextras (mbundle );

Startactivity (in );

Received in activity2:

A: receive

Java code

Bundle extras = getintent (). getextras ();

If (extras! = NULL ){
Textview. settext (extras. getstring ("activity1 "));
}

B. Receive

Java code

Bundle Bundel = getintent (). getextras ();
User = (User) Bundel. Get ("user ");

2. sharedpreferences

Set the following in activity1:

Java code

Sharedpreferences sp = getsharedpreferences ("textinfo", 0 );
Editor editor = sp. Edit ();
String text = "hello ";

Editor. putstring ("text", text );
Editor. Commit ();

Intent I = new intent (getapplicationcontext (), activity2.class );

Startactivity (I );

Jump to the Message activity and obtain the following content:

Java code

Sharedpreferences share = getsharedpreferences ("textinfo", 0 );
String text = share. getstring ("text", null );
Msgtextview. settext (text );