Base of Android program development-page value passing

Activity jump and value passing mainly connects multiple activities through the intent class and transmits data through the bundle class.

ExampleCodeAs follows:

 

1.1 UseIntent. putextra () Method assignment

 1   Public   Class Menu Extends  Activity {  2   3   @ Override  4       Public   Void Oncreate (bundle savedinstancestate ){  5           Super  . Oncreate (savedinstancestate );  6   7   Setcontentview (R. layout. Menu );  8   9   ...  10   11           //  Button2  12 Button btn2 =(Button) findviewbyid (R. Id. button2 );  13   14 Btn2.setonclicklistener ( New  Onclicklistener (){  15   16   @ Override  17               Public   Void  Onclick (view arg0 ){  18   19 Intent intent = New Intent (menu. This , Detail. Class  );  20 Intent. putextra ("flg", "list" );  21   Startactivity (intent );  22   }  23   });  24   25   ...  26          27   28 }

 

 

 

1.2. Get the value on another page

 
1Bundle bundle =This. Getintent (). getextras ();2String flg = bundle. getstring ("flg");3If(Flg. Equals ("list")){4 ...5}
 

 

 

2.1 If You Want To transmit a set of data, you must use the bundle object to transmit data.

 
1Bundle bundle =NewBundle ();2 3Bundle. putstring ("name", "jacker");4Bundle. putstring ("phone", "13590010101");5Bundle. putboolean ("flg ",True);6 7Intent. putextras (bundle );
 

 

2.2 The same method is used to obtain the passed Value

1Bundle bundle =This. Getintent (). getextras ();2 3String name = bundle. getstring ("name");4String phone = bundle. getstring ("phone");5BooleanFlg = bundle. getboolean ("flg ");